The document outlines the steps for well drilling and site preparation. It describes leveling the site, digging a cellar and mud pits, hammering a conductor pipe, drilling a rathole, and transporting equipment to the site. Subsequent steps include rig setup, inspection and preparation of drill pipes and drill string, mixing and pumping spud mud, drilling initial sections, cleaning the hole, running and cementing surface casing.

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Well
drilling
Sequence of

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Schedule
Time frame managing
Exploration introduction
THE Drilling SITE
Drilling Rig
Running CSG
Casing CMT
Basic logging

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Exploration and
Geophysics

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Seismic survey

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Let the Story Begin

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THE Drilling SITE01
Once the location for the site has been established, the area is prepared for
drilling, with the following steps:
1. Site Preparation
2.Conductor-rathole-mousehole
3. Transporting Equipment

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THE Drilling SITE01
1. Leveling & site preparation

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THE Drilling SITE01
2. Cellar digging
• A dug-out area,
• located below the rig.
• The cellar serves as a cavity in
which the casing spool and casing
head reside.

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THE Drilling SITE01
2. Cellar digging

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THE Drilling SITE01
3. Mud pit digging

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THE Drilling SITE01
3. Mud pit digging

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THE Drilling SITE01
4. Conductor pipe hammering
Conductor Hole
A large diameter hole bored to facilitate steel pipe. May be cemented in place to allow
conventional oil and gas well drilling operations ,and also allows fluid returns to a mud
system when drilling surface hole.
CONDUCTOR PIPE INSTALLATION
30” OD x 1”. wall thickness has been selected and Affiliate’s standard for world-wide
exploration and development drilling activities
Pile Hammers
• Diesel pile hammers are used for surface driving operations of conductor pipe.
• The driving depth of the conductor pipe is a function of the sediments in the ground.
• The most common used system is a hammer weight of 18t

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THE Drilling SITE01
4. Conductor pipe hammering

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THE Drilling SITE01
4. Conductor pipe hammering Drive Shoe Technology

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THE Drilling SITE01
5. Rathole drilling
Conductor
pipe
Rat-hole mouth hole

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THE Drilling SITE01
5. Rathole drilling
• Rathole
A shallow bored hole under the derrick substructure in which the Kelly is
temporarily stored during tripping operations.
• Mouse Hole
A shallow bored hole under the derrick substructure in which a single drill
pipe joint is temporarily set to facilitate easier connections.

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THE Drilling SITE01
4. Conductor pipe hammering

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THE Drilling SITE01
4. Conductor pipe hammering

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1. Rig Move
Drilling Rig02

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1. Rig Move
Drilling Rig02

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1. Rig Move
Drilling Rig02

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2. Rig up
Drilling Rig02

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2. Rig up
Drilling Rig02
a. Mast Raising

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2. Rig up
Drilling Rig02
b. substructure Raising

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2. Rig up
Drilling Rig02

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2. Rig up
Drilling Rig02

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2. Rig up
Drilling Rig02

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3. Conductor connection
Drilling Rig02
Shaker line

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4. Rig Acceptance
Drilling Rig02
Rig acceptance checklist Rig accept

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5. Pipe rack
Drilling Rig02

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6. Drill Pipe Inspection
Drilling Rig02

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6. Drill Pipe Inspection
Drilling Rig02
Thread cleaning

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6. Drill Pipe Inspection
Drilling Rig02
Thread cleaning

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7. Stands make up
Drilling Rig02

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7. Stands make up
Drilling Rig02
• Single pipe
• Stand “ 3 singles “

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7. Stands make up
Drilling Rig02

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7. Stands make up
Drilling Rig02

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8. Rack back stands
Drilling Rig02

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9. BHA preparation
Drilling Rig02
BHA
• Run a 26" bit + 3 x 9" DC + HW-DP
• Run a 26" bit + float valve + 36" Hole
Opener + 1 x 9" Monel DC + 1 x 9"
Spiral DC + 5" HWDP + 5" DPs
Drill Bit
Drill Collers
Heavyweight
Drill pipe
Hole Opener
Bit sub

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9. BHA preparation
Drilling Rig02

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1. Preparing spud mud
Spud Mud03
• Spud mud
Mud used to drill a well from
surface to a shallow depth. Guar
gum or salt gel are commonly used
offshore as spud mud. Onshore
spud mud is usually a water-base
mud containing bentonite clay that
is flocculated with lime.
MUD SYSTEM SEAWATER & SPUD MUD
Mud Density 8.9 – 12.0 ppg
Rheology @ 120°F/49°C
PV 13 – 15 cps
YP 24 – 32 lb/100 sqft
Gels 11/15- 10/20 lb/100 sqft

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1. Preparing spud mud
Spud Mud03

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1. Preparing spud mud
Spud Mud03
Mixing

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2. Spud In
Spud Mud03
A large diameter hole is
drilled using a large
diameter drill bit. Drilling is
conducted by heavy duty
industrial strength drill bits.
The drill bits come in
different sizes according to
the diameter of the hole
being drilled.

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2. Spud In
Spud Mud03
• First, a large drill
bit is used to drill a
short interval of
hole.

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2. Spud In
Spud Mud03

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2. Spud In
Spud Mud03

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2. Spud In
Spud Mud03
1. Mud pumping
2. Mud cleaning
Mudreturnline

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2. Spud In
Spud Mud03

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2. Spud In
Spud Mud03
Drill to the depth of the first two joints using high viscosity mud (80-120 seconds Funnel
viscosity) and at a very slow pump rate,

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2. Mud Cleaning
Spud Mud03

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3. Continue drilling
Spud Mud03
26” conductor pipe 20” pit diameter
36” conductor pipe 30” pit diameter

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4. Hole Cleaning
Spud Mud03
1. Mud pumping
2. Mud cleaning
Mudreturnline

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5. Wiper trip for hole cleaning
Spud Mud03
At TD circulate the hole clean, displace the hole with gel mud
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6. POOH
Running CSG04

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7. surface Casing Running
04 Running CSG

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7. surface Casing Running
Spud Mud0304 Running CSG

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7. surface Casing Running
03
Float show and float coaller
04 Running CSG

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7. surface Casing Running
Spud Mud0304 Running CSG

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7. surface Casing Running
Spud Mud03
Surface casing
04 Running CSG

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8. Casing Cementing
Spud Mud0305 Cementing
Cement functions
Provides zonal isolation.
Supports axial load of casing.
Protects casing against corrosion and erosion
1
2
3
Provides support to borehole in
plastic or unconsolidated formations
4

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8. Casing Cementing
Spud Mud0305 Cementing
Drilling
Fluid
Spacer Fluid
Bottom Plug
Shoe Joint
Top Plug
Cement
A B C
Float Shoe
Float
Collar
Bottom Plug
Ruptured
Top Plug
Released
Plug
Bumped
Displacement
Fluid

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9. Wait on cement
Spud Mud0305 Cementing
To suspend drilling operations while
allowing Cement slurries to solidify,
harden and develop compressive
strength

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10. Cement Job completion
Spud Mud0305 Cementing

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3. Connection casing head9. Wait on cement
Spud Mud0305 Cementing