Ashish Modi ONGC

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PARUL INSTITUTE OF TECHNOLOGY
P.o. Limda, Tal.: Waghodia-391760,Dist.:Vadodara,Gujarat(India)
DEPARTMENT OF MECHANICAL ENGINEERING
A Summer Training Report
In the field of Mechanical Engineering
At
Oil & Natural Gas Corporation Limited,
Ankleshwar Asset,
Ankleshwar – 393010
Submitted by :-
Modi Ashish Jayprakash
Er.No.:130870119077
B.E.(3rd
Year)
Mechanical Department.
M : +919510801093

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PREFACE
As a part of my B.E. curriculum I have to undergo a summer training that
includes overall study of the related areas related to my discipline obtain practical
knowledge of various mechanical equipment.
This report has been prepared at ONGC Ltd. Which is renowned company in
the business of exploration & production of Oil & Natural gas, Ankleshwar Asset
is one of the oldest onshore oil & gas fields of ONGC Ltd. This training is very
helpful in learning various industrial aspects of Mechanical Engineering and
specifically its implication in the oil and gas industries like ONGC.
This Report is the outcome of our practical exposure of ―Mechanical
Equipment & Processes‖ consisting of various types of mechanical system such
as: Gas and Steam pump, compressor, Diesel Engines.

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ACKNOWLEDGEMENT
I express my sincere thanks to the ONGC Management, for providing me an
opportunity to undergo summer field training at their Ankleshwar Asset.
I am thankful to ONGC Management Mr. Aman Xavier Kandulna [Chief
Manager (HR)-I/C - T&D Centre, Ankleshwar Asset] for granting me permission
to undergo training in ONGC Ltd.
I am indebted to Mr. Shyam Sunder, DGM (Mech), PMM-3 for extending
necessary facilities during the summer training. I am also thankful to
Mr. Abraham George, SE (PTYS,Mech); J.D.Desai(PTYS,Mech); Salim
Khan(PTYS,Mech); Baburao Sir(Chem); Dharmadhikari Sir(Chem); Abhijit
Bhoyer Sir(CPF,Mech); Nageshwaram Rao Sir(CCPP,Elect); Amitesh
Sir(CCPP,Elect) for helping me to complete my training and sparing their
valuable time from their busy schedule.
Finally, I wish to thank all the Engineers, Technician and other employees
of PTYS & CPF of Gandhar field and also to those persons who have directly or
indirectly helped me during this training.
Modi Ashish Jayprakash
Er.No.:130870119077
B.E.(3rd
Year)
Mechanical Department.
M : +919510801093
Parul Institute of Tchnology

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CERTIFICATE
This is to certify that Mr.Modi Ashish Jayprakash (130870119077)has
completed his Industrial Training reported to the undersigned on 01/06/2016 &
underwent training till 30/06/2016.
His overall performance during whole training period was One Month. I
really appreciate his sincere work and bless him a very bright career in Future.
Shyam Sundar/Laxmi Narayan
DGM(Mechanical)
ONGC,Ankleshwar

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Index
Topic Page No.
1. INTRODUCTION TO ONGC 1
2. OVERVIEW OF ANKLESHWAR ASSET 3
3. Driling Technology 6
4. PTYS(PRODUCTION TOOL YARD STATION) 11
5. WORKOVER SYSTEMS 12
6. GGS (GROUP GATHERING STATION) 17
7. CPF (CENTRAL PROCESSING FACILTIES) 24
8. COMBINE CYCLE POWER PLANT (CCPP) 36
9. Gas Turbine 39
10. Cooling Water System 43
11. SAFETY, HEALTH AND ENVIRONMENT 47
12. Take Away From the Training 49

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INTRODUCTION TO ONGC
Company overview
 Type :- P.S.U
 Foundation :- 14th
August, 1956
 Headquarter :- Tel Bhavan, Dehradun, India
 Corporate Office :- New Delhi, India
 Industry :- Exploration & Production (E&P) Company
 Products : - Petroleum, Natural Gas & Other Petrochemicals.
 Revenue :- US $ 25 billion(2015)
 Net Income :- US $ 8 billion(2015)
 Employees : - 34,000 approx.
ONGC was set up under the visionary leadership of Pandit Jawahar Lal Nehru.
He has reposed faith in Shri Keshav Dev Malviya, who laid the foundation of
ONGC in the form of Oil and Gas division, under Geological Survey of India, in
1955. A few months later, it was converted into an Oil and Natural Gas Directorate.
The Directorate was converted into Commission and christened Oil & Natural Gas
Commission on 14th August 1956.
"Not only had India set up her own machinery for oil exploration and
exploitation, an efficient oil commission had been built, where a large number of
bright young men and women had been trained and they were doing good work"
said Pandit JawaharLal Nehru, India's first Prime Minister to Lord Mountbatten, on
ONGC in 1959.
In 1994, Oil and Natural Gas Commission was converted in to a Corporation,
and in 1997 it was recognized as one of the Navratnas by the Government of India.

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Subsequently, it has been conferred with Maharatna status in the year 2010.
In its 60 years of illustrious journey, ONGC has crossed many a milestone to
realize the energy aspirations of India. The journey of ONGC, over these years, has
been a tale of conviction, courage and commitment. ONGCs‘ superlative efforts
have resulted in converting earlier frontier areas into new hydrocarbon provinces.
From a modest beginning, ONGC has grown to be one of the largest E&P
companies in the world in terms of reserves and production.
The company has now grown into a full-fledged horizontally –integrated
world, class E&P company. Today it is recognized as numero uno E&P company in
the world, & 25th among the leading global energy majors as per ‗platts top Global
Energy company ranking , 2008. It is also the first & only Indian company to figure
in fortune‘s World‘s Admired companies List,2007.
ONGC is india‘s flagship energy major. It has discovered six out of seven
producing basins of india; & discovered 6.5 billions tonnes of in –place oil & gas.
ONGC has bagged 85 out of 162 blocks under the New exploration licensing polity
[NELP] Government of India.
Currently, ONGC accounts for the country‘s 69% crude oil and 70% natural
gas production, produces 1.2 million barrels of oil & oil equivalent per day. ONGC
is the largest producer of oil and gas in the country.
ONGC has opened up India‘s ultra-deepwater province by its deepwater
discovery in Krishna Godavari (KG) block. The deepwater success ratio of ONGC
is more than Asia –Pacific average of 20%.
ONGC‘s fleet comprises of 250 onshore installations, 248 offshore
installations. It has 24,300 Km of pipe lines, 15 own and 49 charter hired offshore
supply vessels (OSVS) & multisupport vessel (MSVS) , one own and two hired
Well stimulation vessel along with 18 own and 3 hired seismic crews. It has 75 own
and 26 hired Drilling rigs along with 58 own and 21 hired Work-over rigs.
ONGC‘s wholly- owned subsidiary ONGC Videsh Ltd.(OVL) is the biggest

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Indian multinational with 39 oil & gas project in 17 countries. OVL has a
committees overseas investment of over 5 billion US dollars(23,000 crore rupees).
Currently producing 8.87 million tones of oil + oil- equivalent gas (O+OEG) in
F.Y.2014-15, it targets bringing in 60 million tonnes of equity oil by 2025.
Today, ONGC has the highest market capitalization (among Indian public
enterprises) of over INR 3 lakh crores with 4,84,544 shareholders and the highest
net Profit earning Indian public enterprise with the net profit of Rs 22,095 Crores
(after Tax) for the fiscal year 2014-15.
1. Mumbai region-Mumbai
2. Estern region-nazira(Assam)
3. Southern region- Chennai
4. Western Onshore region-Vadodara
5. Northen region-Dehradun
6. Central region-Kolkata
OVERVIEW OF ANKLESHWAR ASSET
During 1858-59, geological survey revealed the existance of two structural
highs/elongated dams trending in ENE-WSW direction near HAZAT &
KOSAMBA villages in Bharuch & Surat District respectively.
The 1st
exploratory test well Ankleshwar was spudded-on 25th
February 1960
with Russian rig URALMARSH-5D. The first commercially producing well of
ONGC was christed as ―VASUDHARA‖ ON 23RD
June 1960.

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Ankleshwar asset has been grouped into four areas :-
Area Field
1. Ankleshwar, Andada, Southwestmotwan, Sisodara,Kudara
2. Kim,Kosamba,Olpad,Elao,Kaptur
3. Gandhar,Dahej,Pakhajanda
4. South Malpur,Jambusar,Dabka,Gajera,Degam
Ankleshwar asset covers three district of Gujarat viz.Vadodara,Bharuch & Surat.
The operational activities of asset are spread over 5100 sq.kms.
 Ankleshwar asset has 10 drilling rigs
 Ankleshwar asset has 15 work over rigs
There are number of Department at Ankleshwar asset, They are :-
1. Admiinistration
2. Drilling Zone
3. Elecrical Dept.
4. Transportation Dept.
5. Accounts
6. Civil Dept.
7. Labor
8. Logging Dept.
9. Planning Dept.

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Fabrication Shop :
The main work of this fabrication shop is maintanance of the jobs brought from
the rigs.The main working done in fabrication shop are gas cutting, gas welding and
arc welding.
There are three workshop at Ankleshwar :
Machine Shop :
The main work of this shop is to repair the smaller parts brought from rigs.
Some basic parts that they have to repair piston nuts, bolt, shaft and they have to
replace the worn out bearing etc. there are modern equipments at this shop which
can be used accordingly as per the job requirement. There are number of lathe,
Drilling machine, milling machine and shaper too. Some of the lathe machines are
 HMT LATHE 1.45
 HMT LATHE NH22
 VIKRAM LATHE
 MILLING LATHE etc.
Diesel & Equipment repair shop :
The main repaired jobs are the caterpiller and Cummins engineers which are
mostly used at rigs. The equipment like compressors, draw works, mud pumps,
coolling heads and other equipment are also brought at the shop for repairing.

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Driling Technology
The main objective of ONGC is self sufficiency in oil production. To achieve
this objective, more and more Oil & gas wells must be drilled to the petrolioum
bearing formation.
The ultimate purpose of drilling an oil or gas well is to provide a conduit from
the reservoir to the surface; which will permit the commercial withdrawal of fluid
from the reservoir. All wells drilled should yield geologic information for the
purpose of reservoir control, evalution & discovery of resources. There are two
types of wells are drilled :-
1. Exploratory Or Wild Cat Wells
As the saying goes ―Oil is where you find it‖ the ultimate tool to find out the
new sources of petroleum is drilling of an exploratory well.
2. Development Wells
Once a field is established to have hydrocarbon, development wells are drilled
to get the production from the field.
Drilling Methods :
A. Cable Tool Drilling :-
In this method the drilling tool is suspended from a cable attached to a rocker
beam, which by means of a balancing movement alternately raises the drilling
bit and allows it to fall, thus delivering sharp sucessinve blow to the bottom of
the hole thus breaking up the rock.
B. Rotory Drilling :-

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String of drill pipe with a cutting bit is rotated. The bit is lowered as the
formation drills out from under the bit.
Drilling Rigs :
The drilling unit to drill a well is called ―RIG‖. Rigs can be classified in many
ways :
I. Based on the special requirement and application, rig may be classified as
:
a) ONSHORE RIG: Rig which are used for drilling on land. These can be
further sub-classified as :
 Conventional Rigs : These rigs are transported by trailers or trucks.
 Mobile Rigs : These types of rigs are suitable to drill shallow wells.These
rigs are manufactured to drill up to 3000m depth well.
 Desert Rigs : These rigs are suitable in desert areas here trailers with heavy
loads can‘t move. ONGC has purchased one desert rig. Drill upto 3600m
deapth in desert.
 Heli Rig : These Rigs can be dismantled in smaller modulus of 4000-5000lbs
 T.B.A Rig : TBA stands for ―Transportable By Any means‖. It is small so it
can be Transport easily.
b) OFFSHORE RIG : Rigs which are used for drilling in water. e.g. sea, lake,
pond, river, etc. further classified as :

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Jack Up Rigs : These are cheapest to operate. They are capable to drill
300m of water to 25000m.
Semi Submersible Rigs : This is most expensive type rig to consruct. They
are capable to drill 25000m.
Drill Ship : It is capable over 5000m.
Fixed Platform : These are the platforms that are built for production
purpose in the sea.
II. Based on the capacity of the rigs, these may be classified into following 4
types :
1) Type-1 Rig : Drilling capacity upto 3600m.
Draw works 1000 HP
Hook load capacity 5,50,000lbs
Known as ―E-760‖.
2) Type-2 Rig : Drilling capacity up to 4900m.
Draw works 1400 HP

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Draw works 2000 HP
Draw works 3000 HP
Main System of a Rig :
Rotating Equipment : it includes rotory table, Kelly, swivel, drill pipe coller,
drill bit etc.
Hoisting Equipment : The main function of this unit is to provide the means
for removing equipment from or lowering equipment into hole. It comprises
of Crown block, Travelling block, Drilling block, Draw works.
Circulating system: the basic function of this unit is to carry out the cutting and
balance of formation. It comprises of Mud pump, Stand pipe manifolds, Rotary
hose, Drill string etc.
Mud handling system: it is used to clean out the coming mud from the well. It

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comprises
Of :
Shale shaker
Desander w
Desilter
Degasser
Centrifuge
Mud cleanes etc.
Land rig classification
Based on the type of rigs, the drill site for the future well must be prepared for
proper placement of equipment. The land around the well site is cleared, grade and
labelled. A celler pit is made along with rig specific foundation. For all other
auxiliary equipment cella A labelled foundation strips are made. If necessary, local
roads and appropriate
The rigs are surfaced to facilitate transportation of rig equipment. Drilling rig
equipment can be divided into two systems Mast and Sub Structure Power System.
1. A.C - D.C.
2. D.C - D.C
Most land rigs come under two Categories -
• Carrier mounted rigs
• High floor mast and sub structure
Carrier mounted rig
These are also called mobile rigs in which rigs is mounted on wheeled carrier.
This carrier can be driven to the well site with all necessary hoisting equipment,
engines on truck unit. These rigs are for shallower depth wells.
High floor mast and Sub structure These are higher capacity rigs. In these rigs
components are transported to new location with the help of trucks heavy duty
trailers. High floor mast and sub structure in ONGC are —
1. BHEL electrical rig

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2. ROMANIAN electrical rig
Rig Move/building procedure
Rig building operations involves the following activities :-
Drill site preparation
Route survey
Rig releases rigging down
Transportation of rig equipments
Rigging up
PTYS, (GANDHAR & ANKLESHWAR)
PTYS stands for Production Tool Yard Store. This is the store house of all the
equipments which are required for production.
In addition to housing the central maintenance teams (mechanical electrical/
instrumentation) that caters to all preventive maintenance works, it has some
production departments like:
There are number of sections in PTYS (production tolls yard services).
These are:
1.Fishing: it is a process in which the broken or stuck equipment or small
component, anything from a part of or all of down equipment, string, or any
material accidentally dropped into the well bore is recovered from the well bore.
For evaluating the fishing problem the following information are required. It is
extremely important that complete and accurate data is recorded.
• Well data
• String data
• Well condition

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Tools generally being used in fishing operations are:
1. For external catch i.e. to catch the fish from o.d(outside dia.): OVERSHOTS &
DIE COLLARS
2. For internal catch i.e. to catch the fishing job from i.d(inner dia.): MEILTECH
& SPEAR
Some additional tools used are impression block (to get impression of fish face over
it) and milling cutters tipped with tungsten carbide.
2. Tubular: This shed contains different types of tubes being used in wells. Cross-
overs are available here to account for variation id dia. Of tube string
in case if required. Other tools here are pump joints. Diff. sizes of joints and cross-
overs are: 27/8", 31!2", 31/8" etc.
3. Mud plant: generally brine is used for killing and circulation purpose. This is
mixed with certain additives to enhance certain properties of the mud such as
specific gravity, viscosity etc. -
Water + Nacl-> spec. gravity of 1.18 or 1.19(normal brine)
Water + Cacl2-> spec. gravity of 1.25.
For higher spec. gravities, Barite is used. Sodium hydroxide (NaoH) is used to
maintain pH of the mud around 9.5 as acidic medium corrodes easily.
WORKOVER SYSTEMS
INTRODUCTION
When oil and gas well starts behaving erratically during production, it is -
Commonly called as sick wells may be commonly due to low production rate, high
GOH, high water cut or mechanical failures. For tacking remedial measures, work-
over programmers are made. -
Work over programmer are variety of remedial operations on a producing/

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Ceased/injection well for restoring its original position or increasing production by
work over rig.
work-over job is done with the help of work-over rig which is comparatively
Smaller than drilling rig in size as well as capacity.
The rig that i saw had salient features like:
 Capacity: 120 tones
 Carrier mounted rig
 Most up-down & utility work performed "hydraulically"
 Controls "pneumatic"
 Cummins engine- 525 BHP, KTA-19C type.
Power for hosting and roading is gained from "allisson transmission" through an
engine. Engine runs and power transferred to allisson transmission which consists
of sun and planetary gears, then power is transferred to draw works then to rotary
table and crown block, from crown block it is transferred to traveling block.
THE SICKNESS OF THE WELL:
1. Mechanical Problems:
Bad primary cementation and channeling behind casing. Casing or well head
failures.
Perforation problems.
Production of sand, paraffin.
Failure of down hole equipments.
Failure of artificial lift equipments.
Failure of tubing.
2. Reservoir Problems
3. Fluid Problems
4. Problems around the well bore
Work-over planning is to maintain the field at the optimum producing well

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and work-Over with work-over rig is performed to:
a. Remedy problem wells
b. Repair mechanical failure in oil and gas wells
c. For maintaining or improving production well stimulation can be an alternate
to drilling new wells
d. Tore complete in new horizons or evaluate.
e. Eliminate excessive gas or water production
f. Clean cut and sand control is also carried out
g. artificial lift equipment such as gas lift, sucker rod pump, submersible pumps,
hydraulic pump are installed with the help of work-over rings
h. Control production of oil, water and gas in stratified reservoirs.
REMEDIAL MEASUREMESURES:
Cement Squeeze Job: The main purpose of this is to fill all perforations or
channels behind casing with cement to obtain a seal between the casing and
formation. It is also used to seal off undesirable perforation, plug primary cement
channels to exclude water or gas from oil zone, repair damped casing and
supplement original primary cementation.
Sand control: the production of sand in oil wells is one of the oldest problems faced
in oil field. It is usually associated with sandy reservoirs of Tertiary age. There are
three main method for this remedy, these are: Reducing drag forces, mechanical
methods of sand control, and plastic consolidation methods of sand control
Formation damage: Following remedial measures are taken up for this problem : (a)
Surfactant
(b) Acidization
(C) Mud Acid
(d) Hydraulic Fracturing
Paraffin plugging:
Plugged perforations:
Water production work-over: channeling being casing is squeezed of using low

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filtrate cement and a low pressure Squeeze job. The wells have to be reperforated.
Coning is alleviated by plugging lock back. Fingering in layer reservoirs is
controlled by low pressure squeeze cementing the water. Producing zones.
Work-over for reducing high GOR wells: low pressure cement Squeeze jobs
can usually percent gas production in layered or stratified reservoirs.
Recompletion work-over, etc.
TOOL USED
|) Bridge plug-to allow isolation of well-bore b/w adjacent zones.
ll) Packer-to allow isolation for acid treatment of lower of upper zones.
lll) Cement retainer-it helps cement to be placed in the formation below the tool
Through the work string.
IV) Selective Stimulation Tool (SST)-to allow precise placements of treating fluids
Within a perforated interval.
V) Choke packer- it's just a modification of standard packer.
VI) Electric Wire line Setting Tool (E-Line)-designed to allow the tubing bridge
plugs.
APPLICATIONS -
i. Water shut off
ii. Lower zone abandonment
iii. Dement Squeezing
iv. Acidizing and chemical treatments
v. Flow profile modifications
vi. Hydraulic fracture
vii. Production testing
ACCESSORY TOOLS
!) Coiled tubing connector
ll) Back pressure valve
Ill) Locating tool

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IV) Emergency disconnect
V) Pull disconnect
VI) Hydraulic disconnect
Vll) Circulating valves
VIll) Fluid loading valve
IX) Retrieving bridge plugs
SCALE DEPOSITION
Scale deposition is one of major problems being faced in well-bores. It's formed on
surface of tubing and thus affects the production.
• Causes of scale deposition
Primary factors affecting scale precipitation, deposition, and crystal growth are:
Super saturation; mingling to two unlike water having incompatible compounds in
solution; change of temperature; change of pressure on solution;
evaporation(affects concentration), agitation, contact time, and PH.
SCALE REMOVAL
Scale is classified by method of removal. Chemically inert scales are not soluble in
chemicals. Chemically reactive scales may be classified as: -
(l) Water soluble
(II) Acid soluble, and
(Ill.) Soluble in chemical other than water or acid.
Steps to be taken in solving scale problems are:
1. Identify the scale and the reason for its deposition.
2. Remove deposit by chemical or mechanical means.
3. In perforated completion, it may be more satisfactory to bypass scaled -
Perforation by reperforating.
4. Inhibit against further scale deposition.

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GGS (GROUP GATHERING STATION)
The GGS is designed and constructed for safe operation of oil and gas and as
per oil mine regulations (OMR) and relevant OISD and APL standards. The size of
Group gathering station depends on no of oil gas well planned so connecting to
GGS and the quantity of oil gas to be handled and processed.
During my training, I got an opportunity to visit some of GGSs. There are
number of
Installations there which I'm briefing down along with GGS divisions. I spent my
time in area 3 as Specified above Ankleshwar is divided in four areas.
Important installations of area 3:
GGS-1
• GGS-2
• GGS-3
• GGS-4
• GGS-5
• GGS-6
• GGS-7
• GGS-8
• GGS-DAHEJ
• EPS-JOLWA
• WTP-ZANORE
Critical equipments installed in area 3:
• Crude oil pumps (centrifugal & reciprocating)
• Fire water pumps
• IIA compressors
• Jockey pumps
• Booster pumps

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• Gas lift compressors
• Zero flaring compressors
operational procedure along with maintenance. Each GGS has been provided
with some units. These are:
i. Oil pump house: oil pump house is for pumping of oil from GGS to CPF. Oil
pump house comprises of oil tank, strainer, and oil pumps. Oil tank is of three
types: receiving, stabilization and dispatch tanks each of capacity ranging
from 200 to 1000 cubic meter. Strainer is fitted near suction point. It is used to
clean the incoming oil, it is of simple y-type configuration. Oil pumps are of
two types: centrifugal and reciprocating.
ii. Centrifugal pumps: These are rotodynamic pumps which convert mechanical
energy into hydraulic energy by centripetal force on the liquid. It consists of
impellers, diffusers, casings, bearings, shaft and mechanical seal. A rotating
impeller increases the velocity of the fluid and casing converts this increased
velocity into increase in pressure. These pumps can be single stage as well as
multi-stage. Up to 11 stage pumps are being used.
iii. Reciprocating pumps: These pumps use a piston and cylinder arrangement
with Suction and discharge valves integrated into the pump. Pumps can be
simplex i.e. of single cylinder to four cylinders. Commonly, duplex or triplex
pumps are in use. Further, it can be single acting or double acting.

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Equipment Operational Procedure
Starting Procedure
Centrifugal
And
Reciprocating pumps
 Fully open the suction valve
 Bleed the air/gas from bleeding
point
 Check that the discharge valve is
fully closed
 Start the pump
 Check for any abnormal sound
from pump.
Stopping Procedure
 Stop the pump
 Close the discharge valve
Maintenance Schedule
Centrifugal
And
Reciprocating pumps
 Check Cooling line of
mechanical seal/condition of
gland packing
 Check for abnormal sound
 Do greasing/ top up lube oil
 Check bearing temperature,
pump body temperature
 Tighten foundation bolts
 Check Vibrations
 Check Coupling/Bushes
 Check Alignment
 Check Head and Flow
 Check condition of Mechanical
Seal

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1. Fire Water Pump House :
Fire water pump is installed there to fight fire in case if happens. It
mainly consists of water tank, pumps and Their network, fire water
sprinkler system etc. pump is used are electrical and diesel engine
driven.
Jockey pump is there to keep the header pressurized. Auto system is
followed comprising jockey pumps and electrical engine.
2. Generators: Generators are used as a back-up source of power in case
no electricity is available. Generators are used to produce electricity by
converting mechanical energy into electrical energy with the help of an
alternator. 125 kva and 380 kva generators are used in GGSs.
Generators can be of two types:
diesel engine or gas engine driven. Diesel engine driven generator is used in GGS.
DG mainly comprises of an alternator (gives electricity as output), turbo-charger,
engine, exhaust system etc. turbocharger mainly has two parts-turbine &
compressor part. Turbine part is connected to exhaust and compressor part to inlet
air valve. Turbocharger uses exhaust gas temp. as power to drive turbine part which
in turn transfer power to compressor part and it compresses the in-air, hence air fuel
ratio gets increased and so does the efficiency.
Starting Procedure
DG SETS
 Check the fuel, oil and water
level
 On the Battery switch
 Start the Engine
 Put it on load and check the
frequency and voltage
 Check for any abnormal sound
from engine
Stopping Procedure

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 Cut-off the load on generator
 Stop the engine
Maintenance Schedule
Engine
of
Generators
and
Fire water pumps
 Check external piping, hoses,
tubings
 Clean strainer fuel system
 Check radiator fan, v-belts
 Check cooling system
 Clean fuel tank breather-fuel
system
 Check Alignment
 Replace Lube oil filter
 Replace fuel filter and parts
 Adjust injector valves
 Clean radiator externally
 Check for abnormalities
 Check Push Rods
3. I/A Compressor:
Instrument controlled compressor is installed in GGS1, These are three such
compressors installed there in this compressor major components are motor, air
drier, intercooler, moisture separator, aftercooler, motor operated valves and non-
return valve. Basic function of this compressor is to compress low pressure gas and
make it to high pressure gas so that it can be Sent to CPF.

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This compressor is reciprocating type, 3-stage compression is achieved in here.
Motor drives the piston in cylinders and gas is pressurized, cylinder is equipped
with suction and discharge valves. Intercooling is achieved with water in jackets
running all across the system. Pressurized gas becomes hot, so aftercooler is used to
reduce its temperature. Non-return valve assures that pressurized hot gas doesn't
return again once it's discharged.
Equipment Operational Procedure
Starting Procedure
I/A COMPRESSOR
 Check oil and water level in
compressor and it‘s cooling
tower
 Start the cooling fan and cooling
water pump
 Start Auxiliary oil pump and put
the compressor starts check for
any abnormal sound
Stopping procedure
 Stop the compressor
 Stop the cooling fan and cooling
water pump
Maintenance schedule
I/A COMPRESSOR
 Check all external piping, tubing
 Check compressor vibration,
undue noise
 Check crankcase lube oil level
 Check & maintain the quality of
water
 Check NRV valve component

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 Check Alignment
 Replace Lube oil filter
 Replace fuel filter and parts
 Adjust injector valves
 Clean radiator externally
 Check for abnormalities
5. Separator platform: Normally 3-phase separation is carried out here. It
has got certain advantages over 2-phase separation, such as: Free water
Separated first, better quality of oil produced etc.
5. Storage unit & pipe meshes :
Once separation is done. Gases and oil has to be stored in tanks before
being sent to CPF. There are two types of storage tank available receiving and
stabilizer tanks. Oil & Gas are received in receiving tank and then pass to
stabilizer tanks; there it‘s being left for some time to get stabilized. Gases
come on top of the oil in this procedure.
6. Electrical Substation :
In each GGS, one electrical sub-station has to be there. It consists of mainly:
breakers, panels, main cables & switches. It comes handy in case of repairing.
Whenever repairing of any component has to be done, then that
unit/component is being cut-off from main power supply.
7. Control Room :
Each GGS is provided with one Control Room, from where every component
and unit is being controlled with the help of instruments. Control panels are
there and indicator also used.

24
CPF GANDHAR (CENTRAL PROCESSING FACILTIES)
"Gandhar" is the Oil field currently being exploited here in ankeshwar. There
are about 34 production installation at ONGC, Ankleshwar, one of them is CPF
(Central Processing Farm). It is the heart or main processing unit at ONGC,
Ankleshwar.
There are about 21 different plant functioning at CPF (Gandhar), serving
various requirements in the Sequential treatment of crude oil & gas extracted from
the producing wells. One Of these plants, CCPP functions as the power-generating
unit here.
List of the operating units in the CPF:
1. CSU : CRUDE STABILIZATION UNIT
2. CFU : CRUDE FRACTIONATION UNIT
3. GAS INJECTION UNIT.
4. WATER INJECTION UNIT
5. OGC-I(OFF GAS Compressor)
6. OGC-II (OFF GAS Compressor)
7. BOILER UNIT
8. COP-CRUDE OL PUMPING UNIT
9. PROCESS & PRODUCTs QUALITY CONTROLLABORATORY
10. FIRE section
11. CCPP – COMBINEDCYCLE POWERPLANT
12. HEATER TREATER
13. AIR COMPRESSOR UNIT
14. MAIN INJECTION PUMP UNIT
15.SUB STATION 1
16. SUΒSΤΑΤΙΟΝ 2

25
17. ETP-EFFLUENT TREATMENT PLANT
18. ETP -EFFLUENT TREATMENTPLANT.
19. STORAGE TANK
20. GLCU - GAS LIFT COMPRESSOR UNIT
21. WATER TREATMENT PLAN
PROCESSES AND FUNCTION OF VARIOUS PLANTS AT CPF :
CSU(Crude Stabilization Unit) :-
CPF has two identical trains of CSU in Ph.1 and two number of identical trains
in Ph.2 Each trains consist of HP separator, MP separator and LP separator along
with associated system like Heat Exchanger and pumps.
In addition to PH2 of CSU is having gas fired LP preheater between MP and
LP separator of each train. The crude stabilization process, well fluid is passed
through series f separator to reduce the pressure in stages, by liberating the gas.
The well fluid which is comes from GGS, is first sent to HP sep. at CPF which
operated at 25kg/cm2. Then crude oil goes to MP sep. through control valve, which
operated at 9kg/cm2 and then LP sep. at 0.2kg/cm2. The stabilized oil along with
Water coming out of LP Sep is sent to storage tanks with the help of pumps. The
heating of well f1uid in LP preheater increase the heavier components viz. propane
and butane in the low pressure gas which otherwise Will get vented off from
storage tanks and helps in de-emulsification.
The excess gas liberating from separators, which is not consumed by
Consumers is vented in glare header which after passing through unit flare KOD.
Any liquid carryover is knocked offin KOD and with the help of KOD pumps.
Separated liquid is sent to storage tanks. All the separators are protected from over
Pressurization through individual pressure control valve, and pressure safely valve.

26
Specification :
Make Sun Dyne, Japan
Head 515.7 m.
Capacity 14.1 m3/hr
Specific gravity 0.543
Input speed 2960 RPM
Output speed 12300 RPM
Motor 37 KW
LP Condensate Pumps :
Make Swelove
Flow rate 4500 lit/hr
Pressure 38 kg/cm2
Motor 22 KW
STABILIZED CRUDE PUMPS :
Make KSB pumps
Discharge 120 m3/hr
Head 74.3 m.
Speed 2930 RPM
Motor 37 KW

27
FLARE BLOW DOWN PUMPS :
Make KSB pumps
Discharge 10 m3/hr
Head 39 m.
Speed 2900 RPM
Motor 3.7 KW
LP PREHEATER BLOWERS :
Make Andrew Yule & co.
Fan FD fan
Fan Size 1.395 m.
Fan Arrangement 9/d
Capacity 12.95 m3/hr.
Temperature 65c
Pressure design 503 kg/cm2
Speed 1480 RPM
Motor 125 KW
СFU (Crude Fraction Unit) :
CFU consists of mainly condensate receiving system, i. ration, light and
fractionation column and LPG column. Feed condensate is received in condensate
surge drum, which is normally operated at 30 kg/cm2. Weir plate and boot is
provided to drain the separated water trough and interface level Control valve in
CSD.
Two condensate feed pumps are provided to feed the condensate to LEF
column after passing through coalescer filter. Water and any foreign material in the

28
condensate is filtered and drained off through interface level control valve. LEF
column is designed to strip off methane, ethane, C02 and a part of propane. It is
operated at a pressure of 30 kg/cm‘ and has 35 bubble cap type valve trays.
Thermosyphon type hot oil reboiler is used to heat the condensate. The top and
bottom temperature of the column are maintained at 550⁰C and 100°C respectively.
The vapors from top of the column are condensed in a condenser. The reflux thus
generated is collected in LEF Reflux Drum from where it is refluxed back to
column 1to maintain it's temp.
The bottom product of LEF ends from LPG. Column is operated at 10kg/cm2
and has 55 single pass bubble cap type valve tray. Top and bottom
Temp of LPG Column are normally maintained at 57⁰C and 13.1°C respectively.
The vapor from top is Condensed in LPG condenses, which is flooded type. The
liquid LPG is collected in reflux drum and a part of this is refluxed back in to the
column through a pump. Remaining LPG is sent to storage sphere under a level
control. The bottom product is storage as Naphtha after passing through coolers.
Specification :
HOT OIL MAKE-UP PUMP :
Make Khimline
Discharge 15 m3/hr.
Head 41.2 m.
Speed 2910 RPM
Motor 9.3 KW
HOT OIL CIRCULATION PUMP :
Make Khimline
Discharge 170 m3/hr.
Head 128.7 m.

29
Speed 2960 RPM
Motor 10 KW
HOT OIL TRANSFER PUMP :
Make BPCL
Discharge 15 m3/hr.
Speed 2900 RPM
Motor 9.3 KW
KNOCK OUT PUMP :
Make Khimline
Discharge 10 m3/hr.
Head 47 m.
Speed 2850 RPM
Motor 3.7 KW
LPG LOADING PUMP :
Make Khimline
Discharge 60 m3/hr.
Head 72 m.
Speed 2900 RPM
Motor 37 KW
Water Injection Plant :
To maximize the oil recovery and maintain the reservoir press, water is injected at a
press of age centrifugal pumps, each having capacity of 250m3/hr. The suction
press required for these pump is 6kg/cm2 with help of 4 no or 7 stage centrifugal

30
pumps, each have capacity of 250m3/hr. There is water injected to make out oil
with high pressure.
Specification :
Make Ebara cop, Japan
Normal Cap. 250 m3/hr
Rated Cap. 275 m3/hr
Suction pressure. 5.8 kg/cm2
Discharge pressure. 180 kg/cm2
Head 1742 m.
Speed 5400 RPM
Motor 1.9 MW
AUXILARY OIL PUMP :
Pressure 5 Kg/cm2
Capacity 180 ltr/cm2
Speed 1480 RPM
WATER INJECTED BOOSTER PUMP :
Make Ebara
Normal cap. 250 m3/hr.
Rated cap. 275 m3/hr.
Head 60 m.
Speed 1480 m.
Motor 75 KW

31
LUBE OIL COOLING PUMP :
Make Kirlosker
Head 20 m.
Speed 1450 RPM
Power 15 KW
OFF GAS COMPRESSORS :
The low pressure gas released in CSU is rich in propane, butane and higher
fraction. In order to recover these fraction and for transporting it to consumers, this
gas is compressed.
phase-1 Compressor unit (OGC-l): 32 KM 101 A/B/C :
Three reciprocating compressors of IR make each with a capacity of 1.8 Lac
m3/day is available for raising the pressure from 4.5kg/cm2 to 25kg/cm2 in two
stages. The M.P. gas from field is taken at suction of tile compressors after passing
through MP scrubber to scrub off any liquid entrained with the gas. The excess gas
from CSU MP Separator can also be diverted to OGC-1 for compression. The
compressed gases, after compression, are passed through after-coolers and
knock out drum, before it is supplied to consumers.
Specification :
Make Dresser Rand
Capacity 175,000 m3/day
Suction Pres. 5 kg/cm2
Lube Oil Capacity 70 lit.
Motor 600 KW
No of Compressor 3

32
Phase-2 Compressors unit (OGC-2): 16/17/18 k.101 :
The LP gas at 0.1kg/cm2 is compressed to 0.2kg/cm2 in SI stage of compressor and
passed through intercooler. Water and higher fraction. there is 3 stage compression
of gases.
Specification :
Make Mannesmann Demag, Germany
No. of stages 2 process in 06 MH6B, 1 in 05 MV6A
Speed 15787 RPM
Technical specification of 06 MH6B :
Volume 6179 m3/hr.
Inlet Press. 1.08 bars
Discharge Press. 9.5 bar
Casing Design 15 bar
Casing Design temp. 150⁰ C
Technical specification of 05 MV6A :
Volume 926 m3/hr.
Inlet Press. 9.5 bar
Discharge Press. 40.2 bar
Casing Design 50 bar
Casing design temp. 200⁰ C
Motor 1900 KW

33
AUXILARY & MAIN LUBE OIL PUMP :
MFG. All Weller
Type Screw pump
Pressure 38.17 kg/cm2
Speed 1480 RPM
Volume 0.645 m3/min
Motor 69 KW
GEARBOX :
MFG. BHS-Volth
Model TG-325
Power 1900 KW
Input Speed 2966 RPM
Output Speed 15787 RPM
Gear Ratio 5.322
Service Factor 1.4
BOILER UNIT :
In this unit as the name showed these are termed as the utilities for the plant in this
section the water is iced to the boiler and converted into the Steam and sent to the
storage tank for breaking the emulsion of water and oil the
Water is drained out of the tank.

34
CRUDE OIL PUMPING STATION :
Stabilized crude oil received from CSU is routed to intermediate crude oil storage
tanks to remove any residual gas and some water. This liquid is then transferred to
main crude oil storage tanks, Four numbers of transfer pumps. Liquid is allowed to
settle in the main tanks for sufficient time and free water is then drained to ETP.
Stabilized crude oil having water content, <1 % pumped to KT refinery, IOCL.
Baroda.
Specification :
Make BPCL
Pump Capacity 400 m3/hr.
Head 254.8 m.
Lube Oil sump Capacity 5 ltr.
Motor 350 KW
No. of pumps. 3
GAS INJECTION UNIT (GIU) :
As the Oil and Gas are produced and taken out from the reservoir, pressure of the
reservoir depletes. In order to maintain the pressure of the pressure of reservoir for
continued exploitation and maximize the oil recovery, high presser gas is injected
back into the reservoir. Dehydrated and C free lean gas coming from IPCL at 37
kg/cm2 is compressed to 310 kg/cm2 in yd stage reciprocating compressor. Then it
goes to GGS and at 50% or 100% lead. Suction and discharge KOD is provided
with automatic drain valve to remove any liquid carryover.

35
Specification :
Make Ingersoll-rand
Speed 742 RPM
Current 93 A
WR Motor 154.5 kgm
Frame TCP 56F
Capacity 314 kg
Lube oil Press. 3.9 kg/cm2
Lube oil Temp. 54⁰ C
GAS LIFT UNIT(GLU) :
For lifting of crude oil from low pressure well, compressed dehydrated gas is used.
Three numbers of single stage reciprocating compressors, each having capacity of
0.38 MMSCMD, are used to collect dehydrated gas at 37 kg/cm2 up to 122 kg/cm2.
Dehydrated gas is either Rich gas from GDU of Lean gas returned from GAIL. The
compressed gas is sent 10 GGSs through a leader for further distribution into the
well for gas lift operations.
Specification :
Make Nuovo Pignone
Max. Speed 600 RPM
No. of stages 1
Min. Capacity 8750 kg/hr.
Normal Capacity 15300 kg/hr.
Max. Capacity 17500 kg/hr.
Motor 1000 KW

36
COMBINE CYCLE POWER PLANT (CCPP)
This generating station employs gas turbines & steam turbine as a prime
mover for generating electrical energy.
As the name suggests, the power plant work on the principle of combined
cycle. A combined cycle plant employs two constituents‘ cycle brayton cycle
(gas turbine) & rankine cycle (steam turbine).
WHY COMBINED CYCLE?
Since the temperature of exhaust gases from the gas turbine is considerably
high (about 500O
C).If these high temperature exhausts of the gas turbine were
allowed to escape as such, then it would be wasted, serving no purpose. Instead
of wasting the heat energy in the exhaust gases of Gas turbine, a boiler (HRSG)
to recover this heat is used. The steam generated from HRSG (Heat Recovery
Steam Generator) utilized for producing electric power using Steam Turbine
Generator. Thus this process improves the overall efficiency of the plant.

37
POWER OUTPUT:-
(A) Normal gas turbine operation (open cycle mode) :- 20 MW
(B)Combined cycle operation (without aux . firing) :- 28.5 MW
(C)Combined cycle operation (with aux firing):- 31 MW
(D)Forced draught fan operation(when GT is down) :- 11 MW
The plant has installed capacity of 28.5 MW, in waste heat recovery combined
cycle mode with an option to increase this capacity to 31 MW by burning some
gas in boiler, along with waste heat recovery.
The main components of the plant are Gas turbine (GT) of 20 MW capacity,
Heat Recovery Steam Generator (HRSG) of 64.8 tons per hour capacity, Steam
turbine (ST) of 11 MW capacity, DM Water plant of 20 M3
per Hr capacity,

38
Cooling Tower of 5700 M3
per hour capacity and a Switch yard (Two Power
transformers each of the capacity 25 MVA, 66/11 KV) for interfacing with
Gujarat Energy Transmission Company Ltd (GETCO).
The Gas received is first processed at Gas Conditioning Skid (Inlet pressure is
20 kg/cm2
), for removal of liquid hydrocarbons and any solid impurity. This gas
is taken to Gas turbine and is fired there in its ten combustion chambers, round
the periphery. The shaft mounted seventeen stage air compressor sucks the air
through inlet air filters and supplies for combustion and cooling of the GT
components. The combusted mixture is thrown on the two stages of the impulse
reaction turbine blades. The exhaust temperature of GT is normally at 4500
C to
5000
C.
Exhaust from the GT is taken to Heat Recovery Steam Generator (HRSG) where
we have five stages of heat recoveries and steam output is at about 43 Kg/Cm2
and 440 0
C. The water used in HRSG is De-mineralised (DM) Water – free
from Silica. There is a DM water plant for making DM water from the Narmada
water, received from Jhanor. The DM water is used in closed cycle. Average
makeup of DM water is around 300 M3 per day.
High Pressure Saturated Steam with pressure and temperature of 40 to 43
Kg/cm2 and 400 to 440 0
C respectively is fed to steam turbine (ST). It is a
single drum, condensing type, 29 stage, steam turbine. The condensing is done
under vacuum of about –0.9 Kg/Cm2
.
The condensed steam in condenser, is pumped to Feed storage tank by
Condensate Extraction pumps and from there to HRSG through boiler feed
pump. Thus the closed water cycle is completed.
For cooling requirement of ST condenser, GT and for supplying cooling water
to CPF, we have a Cooling Tower with a capacity of 5700 m3/hr and a CW
Pump House.

40
The shaft mounted seventeen stage air compressor sucks the air through inlet air
filters and supplies for combustion and cooling of the Gas Turbine components
The combusted mixture is thrown on the two stages of the impulse reaction
turbine blades. The gas turbine works on the principle of brayton‘s cycle
SPECIFICATIONS :
 Fuel natural gas
 GE frame – V mark V control system
 Heat rate – 12400 KJ/KWH
 17 axial flow compressor
 2 stage turbine with 10 nos combustion chamber
 Diesel engine for initial startup
 Gas turbine speed – 5120 rpm
The gas turbine speed is 5120 rpm but the speed of the generator rotor should be
3000 rpm for 50 Hz frequency. Therefore a gear box is used for this purpose.

41
Lube oil system: It provides lubrication to the bearings and the engine as a
whole. Main components in the lube oil system are as follows.
 Main lube oil pump
 Auxiliary lube oil pump
 DC Emergency lube oil pump (used when there is a blackout)
 Lube oil tank
 Lube oil cooler (2 x 100%)
 Lube oil filter (2 x 100%)
 Mist eliminator
Hydraulic oil system:
 Main hydraulic oil pump
 Auxiliary hydraulic oil pump
Helical
Gear
GT shaft
5200 rpm
Generator
shaft 3000
rpm

42
 Hydraulic oil filter (2 x 100%)
Turbine Tripping condition:
 Lube oil pressure low and temperature high
 Fire in any area
 Gas leakage in any area
 Turbine inlet air filter differential pressure high
 Bearing and shaft vibration very high
 Start-up excessive fuel flow
 Faulty reading of turbine shaft speed sensor
 Fuel supply pressure low
 High Exhaust pressure and temp
 Turbine over speed ( Mechanical, electrical)
 Turbine excessive acceleration
 Loss of flame
 Exhaust thermocouple open
 Compressor bleed valve position trouble
 Starting device failure to hold speed
 Inlet guide vane control failure
 Emergency trip push button pushed from any location
 Tripping occur due to any generator protection
Gas turbine Generator Specifications:
 Apparent power : 27.5 MVA
 Active power : 22 MW
 Rated terminal voltage : 11 kV
 Rated stator current : 1443 A
 Rated power factor : 0.85 lag
 Rated field voltage : 154 V
 Rated field current : 636 A

43
 Speed : 3000rpm (2 pole)
 Cooling system : air cooled
Steam turbine Generator Specifications:
 Apparent power : 15.625 MVA
 Active power : 12.5 MW
 Rated terminal voltage : 11 kV
 Rated stator current :820 A
 Rated power factor : 0.8 lag
 Rated field voltage : 166 V
 Rated field current : 385 A
 Speed : 1500rpm (4 pole)
Control Room:
 From the control room, the plant operators monitor and operate the
facility, via the plant‘s ―Mark Vie Distributed Control System‖, with the
click of a mouse, viewing graphic representations on various screens.
 The system gives operators both audible and visual signals to keep them
informed of plant conditions at all times and to determine when
preventative maintenance is required.
 COOLING WATER SYSTEM :-
Cooling water pump house had 4 motors each rated 6.6 kV, 450 kW,
980 rpm. On the top of the tower there are big fans used for cooling. It
comprises of cooling towers and C.W Circulation pumps [3 numbers X650m3
/hr and 4 nos. X2100m3
/hr] which circulates cooling water in a closed
network through various heat Exchanges. The cooling tower cools the water
from 45oC TO 33O
C and works under Forced draught air circulation.
H2S04 tank is used to maintain the pH of the water in cooling tank.

44
Details:
 Flow rate :- 5700M3
/ HR
 Type:- mechanical induced draught lross flow .
Switch Yard:
It has the two step up transformers for transmission. Both of them have Primary
star connected with neutral grounded and secondary delta connected. There are
sensors to monitor oil temperature and winding temperature. Taps are present on
the HV sides to facilitate on load tap changing (OLTC). At the secondary (HV)
of the transformers we have CT and PT connected for protection and metering.
After that SF6 circuit breakers are present (52 E and 52 B). Then they get
connected to the 66 kV bus. Surge arrestors are present to protect switch yard
equipments from lightning surges. On either sides of the circuit breaker isolators
are present.

45
Important parts in a transformer (taken from transformer manual)
Bushings: Transformer Bushings are specially designed electrical terminals for
taking out winding ends (leads) through the openings provided on the top cover
or wall of the of transformer tank and connecting to the incoming and outgoing
lines.
Conservator: It provides adequate space for the oil to expand when the
transformer is loaded or when the ambient temperature changes. It also
preserves the insulating properties of oil.
Buchholz relay: it is a very sensitive gas and oil operated instrument which
detects low oil level, formation of gas or development of sudden pressure inside
the oil filled transformer. It is connected to protection circuits which gives an
alarm when the oil level is low.
Pressure relief valve: It prevents mechanical damage to the transformer tank by
releasing excess pressure over the set limit.
Double diaphragm explosion vent: It prevents damage to the transformer tank
by releasing excess pressure that may be generated inside the tank.
51505
Radiators: They are used in a transformer to cool the transformer oil through
natural air or forced air flowing in these radiator fins. As the transformer oil
temperature goes down due to cooling it goes to the transformer tank from
bottom ,cool the windings and gets heated, and then returns to the radiator for
next cooling .This cycle repeats as the oil flow is also natural due difference in
temperature of oil on bottom and top.
Transformer Oil: It is a highly refined mineral that is stable at high
temperatures and has excellent electrical insulating properties. It also provides
part of the electrical insulation between internal live parts.
Silica gel breather: when the load on the transformer changes the oil level in
the conservator also changes. When the oil level is changes air is breathed in,
there is a possibility of moisture and dust sucked in. This can deteriorate the

46
insulating properties of oil. Silica gel breathers are provided to absorb moisture
and ensure clean air is breathed.
Dry silica gel crystals are deep blue in color when new. As it keeps absorbing
moisture it loses its blue color.
Magnetic oil level indicator: It indicates the oil level in the conservator. When
the oil level falls below a critical value alarms are produced.
Oil temperature indicator(OTI): It is used to monitor the temperature of oil
Winding temperature indicator(WTI): It is used to monitor the temperature of
windings and helps in detecting overloads.
Fans: Their main purpose is to provide cooling.
On load tap changer (OLTC): It helps in maintain the secondary voltage
constant by adjusting the turns ratio of the transformer. This process can be done
on load (i.e. the transformer need not be isolated). Taps are provided on the HV
side as current carried by HV side is low and HV side is easily accessible.
Transformer Specifications:
 MVA rating: 20/25 MVA
 Rated voltage ratio: 66/11 KV
 Rated current:158A
 Rated impedance:4 ohms
 Transformer impedance: 12.5% on 20MVA base
 OLTC : +10% and -20%

47
SAFETY, HEALTH AND ENVIRONMENT
SAFETY POLICY
ONGC pays special attention towards safety, health and environment aspects.
They expand lots of money for that.
ONGC's safety policy seeks to provide safe and healthy working condition and
enlist the active support of all staff in achieving these ends. The objectives of
the policy are:
• To promote standards of safety, health & welfare in accordance with the
requirements of Directorate of Mines Safety and also other relevant statutory
provisions as well as approved codes of practices.
• To maintain safe and healthy work places and safe systems and the methods of
work.
• To protect staff and others, including the public and employees of contractors,
from foreseeable work hazards on ONGC's premises.
• To equip the staff with the information, instructions, training and supervision
needed for safe working.
• To provide and maintain a safe and healthy environment for staff with
adequate facilities and arrangements for their welfare.
 Develop safety awareness among the staff.
 To make staff aware of their individual responsibility to make all reasonable
care for health and safely of themselves and others who many affected by
their acts of commission at work and to cooperative with management and
staff in matters of safety.
 To have required safety organization adequately manned for the purpose.
 To budget expenditure required for the above purpose.

48
ENVIRONMENT POLICY
The development activities of the ONGC should be planned on sound
ecological principle and must incorporate appropriate environmental safeguards.
 Environmental impact assessment, with the details required by the
"Department of Environment" should be prepared at the earliest stage of
project formulation and necessary financial provision for various
environmental program and safeguards be indicated in the project estimates.
 Environmental norms prescribed by the Central and state government,
statutorily empowered to do so, in the matter of air and water quality, noise,
land use, afforestation etc. should be strictly observed in the design
,construction and operation of all the facilities of the corporation.
 The widest possible range of information on practical options available for
the design of the project should be gathered and analysed for the final
decision making technology that ensures energy, economy, environmental
safeguards, recycling of resources and utilization of wastes should be
adopted for all projects.
 Releases of hydrocarbons, chemicals and other materials should be
controlled so that it does not disturb the flora and fauna. Releases
containing viruses, pathogenic bacteria and parasites, which survive in the
marine life, should be completely eliminated and precluded from entering
marine waters.
 Work Environment in the operational areas should be conductive to safe
and healthy working conditions. Good housekeeping is an integral part of
sound environment management.
RELEVENT IS-CODES FOR THE PERSONAL PROTECTION
IS: 2925-1984 Industrial Safety Helmets
IS: 4770-1968 Rubber gloves for electrical purpose
IS: 6994-1973 Inductrial Safety gloves (leather & cotton gloves)
IS: 1989-1986(part-I & II) Leather Safety boots & shoes

49
IS: 3738-1975 Rubber knee boots
IS: 5557-1969 Industrial and safety Rubber knee boots
IS: 6519-1971 code for practice for selections, care and repair of
safety Footwear
IS: 11226-1985 Leather safety footwear having direct moulding
sole
IS: 9167-1978 Eye protectors
IS: 9167-1979 Ear protector
IS: 3521-1983 Industrial safety belts.
Take Away From the Training
 Observed high degree of automation in the Combined Cycle Power plant (34.5
MW) at CPF Gandhar, Ankleshwar Asset.
 The control and operation in synchronization with infinite Grid at 66 KV level
and synchronization is totally automatic. I had rare opportunity to witness one
such synchronization with Grid.
 For the first time I had the opportunity to see the internals of Steam Turbine at
CCPP. I got very excited to see its rotor with 29 stages.
 Also I watch HRSG Boiler, Pneumatic Automatic Separator, Deaerator, DM Plant
etc.
 We also see control system and how it made easy to control.
 We see OGC,GLC,GIU,WIU which fully thermal based which is connect us with
practical world.
 Exposed to the vast process complex and its Mechanical & Electrical network in
CPF & PTYS, Gandhar
 Get more over Practical Idea how to deal with problems.
 Exposureto manualsgaveme an insight to what the industry expectsfrom
Mechanical Engineer.

Ashish Modi ONGC

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