The document discusses the implementation of coiled-tubing conveyed perforation (CTCP) in the Saqqara GS323-A1 well, highlighting its advantages in reaching challenging deep well targets. It details the equipment setup, job preparation procedures, and operational guidelines along with safety measures and troubleshooting protocols. Key aspects, including the design and function of the bottom hole assembly and firing head, are thoroughly outlined to ensure the effectiveness and safety of the perforation process.

1. AYAMAN RASHAD, WSL - KAMEL ELSAYED, WSDE
GULF OF SUEZ PETROLEUM Co. GUPCO
FOR THE FIRST TIME IN GUPCO
Coiled-Tubing Conveyed Perforation

2. Coiled-Tubing Conveyed Perforation
SAQQARA GS323-A1
SD RIG-141 TEAM
ON-SITE TEAM
Ayman Rashad, WSL
Mohamed Saeed, NWSL
Kamel Elsayed, WSDE
Hazem Mosaad, WSDE
Ahmed Elbohoty, DIST. ENG.
Mohamed Mohareb, CTU
Alaa Refaee, TCP
Mohamed Salah, WTL
Tarek Ahmed Ali, SOE
A. ELBELTAGY, CTU
A. SHAWKY, CTU
CAIRO TEAM

3. CONTENTS
1. Why CTCP
1. BHA Assembly
2. Firing Head
2. Job Preparation:
1. Acid Pickling For Ct
2. GR/CCL Correlation Run
3. Safe Handling procedures
4. Dummy Run
3. Shooting:
1. Procedures
2. Perforation Runs
3. Firing Charts
4. Lessons Learned – Depth Counter

4. 1. Why : Coiled-Tubing Conveyed Perforation CTCP ?
THE CHALLENGE
GS323-A1 history:
- Clean-out the hole with Baker Taper mill / Motor assembly.
- Clean-out with Halliburton Coil-sweep® assembly.
- RIH w/ slick line … stopped @ 14,670 ft. (target perforating depth 14,800 ft.)
- RIH w/ E-line dummy gun … stopped @ 14,633 ft.
- Due to high angle (68° @ PBTD), It seems that the hole can’t get cleaned enough to run E-
line perforation.
- That’s where CTCP came into action … due to the snubbing capability of CT, that can push
the gun assy. To the required depth.

5. Conveying perforating guns to the zone of interest with coiled tubing has been effectively used
for many years in a variety of applications. Benefits include faster run-in times when compared
to conventional methods. And the guns can be detonated either with wireline or a pressure-
activated firing head. Some of the applications include:
Perforating in Underbalanced Conditions:
• Underbalanced Perforation allows increased flow from the formation, which helps clean the
perforations and helps reduce near-wellbore damage.
High Angle / Horizontal Well Perforating:
• Coiled tubing conveyed perforating could be deployed in horizontal portions of the well
where conventional methods of perforating are impractical or impossible.
Coiled Tubing Used as the Production String:
• The coiled tubing that conveys the perforating guns can also be used as the production
tubing after well completion.
1. Coiled-Tubing Conveyed Perforation CTCP Capabilities

6. 1.1. CT BHA

7. 1.1. Bottom Hole Assembly (BHA)
A standard coiled-tubing BHA consists of :
1. Coil Connector
2. Dual flapper check valves DFCV
3. Hydraulic disconnect mechanism
4. Circulating sub, with rupture disc
5. Equalizer sub with pressure bleed ports,
6. “Ball Drop Type” firing head
7. Perforating gun

8. 1.1. Bottom Hole Assembly (BHA)

9. 1. Coil Connector
• It is used for attaching a tool string to the end of the coiled tubing. When
installed correctly, provide strong sealed connection to the coiled tubing. a
fishing neck, utilize O-ring seals to seal off the coiled tubing in order to
maintain pressure integrity for the tool string (thread: CS-Hydril)
2. Dual flapper check valve
• It is normally run directly below the coiled tubing connector in CTU operations
and at the top of the BHA in snubbing operations.
• It is run as a well control measure to prevent wellbore pressure from entering
the work string.
• The Back Pressure Valve is a flapper type valve that allows flow down the
tubing, but stops flow coming back up the tubing.
• The Back Pressure Valve has two flappers and flapper seals.
1.1. Bottom Hole Assembly (BHA)

10. 3. Hydraulic Disconnect
• Releases the tubing from other downhole tools run below. It is activated
by a ball and tubing pressure. The hydraulic disconnect is used as an
emergency safety joint.
• Another main application; the assembly allows mechanical packers, bridge
plugs, and tubing hangers to be run, set, and released from coiled tubing.
4. Circulating sub with Rupture disk
• is designed to allow a circulation path from tubing to annulus. it is a ball
actuated and is normally run below the hydraulic disconnect and above
the down hole motor.
• Pumping a ball which will shift the piston sleeve, exposing circulation
ports (depending on number of shear pins and rating).
• Rupture disk : when the bottom hole assembly becomes plugged,
increased pressure from the surface will rupture the disc and allow
circulation of an actuation ball. (rupture disk up to 5,000 Psi)
1.1. Bottom Hole Assembly (BHA)

11. 5. Equalizer sub with pressure bleed ports,
• Vented cross-over
• Normally the vent is too small that can allow
building-up pressure against ball seat and shear it.
• BUT
• In case the gun didn’t fire after dropping the firing
ball and had to POH to surface without firing, then
there will be trapped pressure inside the coil and the
ball seat can shear any time now, this vent works to
vent the trapped pressure slowly to avoid miss fire at
surface.
1.1. Bottom Hole Assembly (BHA)

12. It’s all about the firing head
1.2. Firing head

13. 1.2. Firing Head
The Hydraulic-Actuator Firing (HAF) Head is a pressure-balanced tool that automatically fills the
tubing string while it is running in the well. A stainless steel (or Ceramic) ball is dropped from
the surface and circulated into position. Pressure applied to the tubing string actuates the HAF.
Operation
A stainless steel (or Ceramic) ball is dropped from the surface or is circulated downhole into the
hammer piston. Pressure applied to the tubing string shears the retaining pins and forces the
hammer piston into the firing pin. The firing pin detonates the initiator, which starts the
detonation of the perforating assembly. Circulation is regained as soon as the firing pin has
been sheared.
Features and Benefits:
• Allows packerless completions
• Makes actuation easily observable
• Is useful in coiled tubing-conveyed completions, deviated wells, and through-tubing
perforation
• Is reusable

14. The type used for GS323-A1 job

15. Circulating Ports
Hammer
Ball Seat
Firing Pin
HTI
High Temperature
Initiator
PAI: Polymer
Alignment Insert
Prima
Chord
BDB
Firing ball
(Ceramic/steel)
1.2. Firing Head
BDB

16. 5/8” Ceramic Firing Ball
Circulating Port
Ball seat Shear
pins
Shear pin for
hammer
O-ring
O-ring
1.2. Firing Head : Ball Seat

17. Alignment pin
(NOT to be
sheared)
Alignment pin
(to be sheared)
Alignment groove
1.2. Firing Head : Firing Pin

18. All this part needs
to be equalized
1.2. Firing Head : Relief Ports
Relief Ports
These many ports serve as
relief/equalize in the area
between the hammer and the
firing pin … as if there is any
trapped pressure in this area, will
slow the hammer and thus firing
power will NOT be transmitted
completely to the firing pin …
which may not be enough to
shear the firing pin .. Causing miss
fire.

19. 1.2. Firing Head : Circulating ports
After shooting, the ball seat
moves down and reopens the
circulating ports and circulation
is regained.
This is the most reliable
indication for successful firing.
Circulating Ports

20. FIRING HEAD CONNECTOR TO GUN
PAI: POLYMER
ALIGNMENT INSERT
1.2. Firing Head : Bi-directional Booster
BDB : Bi-directional
Booster

21. ACMI XO between Gun and Firing Head with O-rings to
prevent fluids from entering the gun
Firing Head

22. 2. JOB PREPARATION

23. 2.1. ACID PICKLING
Acid pickling:
• Is used to clean-up the inside of coiled-tubing.
• It removes mud/gel, rust, scale, and any grease from the ID of the tubing.
• pumping of acid and/or proppant will loosen debris from walls of tube, and will sweep the
materials out of the coil (take return to production header).
• Protecting the firing head mechanism from any malfunction or miss-fire.
• Also prevent sweeping this scale into the perforations, creating severe impairment for
production.
Recipe:
• Fresh water
• Acid 31.5%
• Fe1A Acetic acid
• Fe-2 Cetric acid
• HAIOS - corrosion inhibitor
You’re going to need:
• Raw HCL acid (31.5% conc.)
• Acid mixing tank (30 bbl. cap.)
• Diaphragm pump (for mixing)
• Pump rubber goods must be able to tolerate acid.

24. Acid mixing tank
(mixing by circulating from the tank
and to it again, not with hopper)
Raw Acid tank
2.1. ACID PICKLING

25. 2.2. SET-CORE GR/CCL CORRELATION RUN
MU SETCORE GR/CCl BHA as follows:
• 2.25" COIL CONNECTOR.
• 2.25" DFCV.
• 2.25" HYDRAULIC DISCONNECT.
• X-OVER (1-1/4" CS HYDRIL BOX x 1" CS HYDRIL PIN)
• 1.75" CIRC SUB.
• X-OVER (1" CS HYDRIL BOX x 1-11/16" SUCKER ROD BOX)
• 1.69" BATTERY HOUSING.
• 1.69" MPL
• 1.69" CCL.
• 1.69" GR.
• 1.69" PULL PLUG
• Measure and report BHA before RIH
• SETCORE GR/CCL is a Memory recording device, it doesn’t send data real time to surface.
• It records using downhole battery so it shouldn’t be connected until about to RIH (battery 23
HRs working time).
• SETCORE has its own digital depth counter, which is connected on CT depth wheel, and CT
reads only the manual / mechanical depth readings.
• SETCORE GR/CCL doesn’t have an ID to circulate through, so there should be a circulating
sub on top of it.

26. 2.2. SET-CORE GR/CCL CORRELATION RUN
Battery
CCL
GR
Memory
XO

27. 2.2. SET-CORE GR/CCL CORRELATION RUN
CT digital counter
CT mechanical
counter
SETCORE
digital counter

28. 2.2. SET-CORE GR/CCL CORRELATION RUN
Procedures:
• RIH, Stop while RIH @ 1,000 ft. for 5 min and @ 2,000 ft. for 5 min as per SETCORE
recommendations
• RIH, stop while RIH @ marker pup joints, flag coil
• RIH, stop while RIH GR peaks, flag coil
• RIH with CT till wet tag BTM, flag coil
• POH 50 ft. and confirm tag again and flag coil
• POH to surface (check coil flag depths while POH)
Notes:
• For any flag … be sure string under tension
• Circ. through string while @ 0.25-0.5 BPM
• Stop at pup joints top depths and GR peaks & flag coil while string under tension (as
marks for correlation).
• Don’t exceed 50 fpm running speed (reduce speed at any expected obstruction” SSSV, X/O,
GLM’s, nipples, … etc.)
• Check WT each 1000 ft. (PU at least 25 / 50 ft. to establish good readings. Record pickup and
slack off weights vs. depth)
• Do not exceed 1000 lb. slack of weight at any time.

29. Securing the gun with Nylon
slings and two long tag lines, lift
same towards RF.
1
Make up Hall 2” safety clamp
below dummy firing head in the
specified place as per Hall rep.
instructions
Install air tagger wire below
safety clamp and start PU assy.
inside V door with tandem lifting
technique (lifting plan, one
banks man, clear communication
between driller, crane operator)
to get assy. in vertical position
using air tagger
2
2.3. Handling procedures

30. Firing Pin
Dummy Firing Head
“Used here as
protector only”
C-plate
4-1/16” 10K flange
(Halliburton CT riser)
Land it smoothly on the
Hall. CT flange &
Remove the wire sling.
DON’T
Don’t forget to change the
ring gasket of CTU flange
before landing the gun.
4-1/16” 10K flange > BX155
3
Wire sling

31. Remove the dummy firing
head, install the active one,
connect same to CT by with
pipe wrench to connect
same to coil, PU gun assy.,
release safety clamp
4
Coiled-Tubing
Firing head
GUN
C-plate
Close CT flange, pressure
test riser to 500 PSI only for
10 Minutes ( to avoid
shearing ball seat by
mistake), normally pressure
test riser to 3,000 Psi
5
After test in OK, open swab,
LMV & wing manual valves.
Use hand pump to open
UMV, SSSV & wing valves.
6

32. • P/U dummy string as explained before.
• Make pressure tests as usual
• Wash down W/ min rate (0.5 BPM / 600 PSI which come first) till tag bottom @ 14840 ft
ORKB (60 fpm), observe return and confirm well is full through sample point.
• Correlate coil depth according to last run with GR-CCL.
• POH to surface (70 fpm) w/ pump out w/ min rate (0.5 bpm).
2.4. Dummy Run

34. 3. SHOOTING

35. PROCEDURES :
• L/D Dummy Run assy.
• Flush coil with 5/8” ceramic ball.
• PU & MU TCP live gun assy. #1 as explained before.
• Pressure test pump lines/reel/hook up connection against tree swab valve to 500 psi for 10
min with water, bleed off to zero (500 Psi only to avoid accidentally activating the firing head)
• Pressure test DFCV to 500 psi for 10 min, bleed off to zero, open tree swab valve and LMV.
• Wash down W/ min rate (0.5 BPM, 500 Psi which comes first, 40 fpm max, monitor pressure)
till gun in depth.
• Confirm gun in depth / check flag marks / set core GR/CCL correlation and string under
tension
• Record wellhead pressure and PU WT before firing.
• Confirm circ. free before drop ball.
• Drop 5/8” ceramic ball from coil Tbg reel port.
• Pump ball with maximum 500 Psi until land ball in place.
• Raise up pressure on stages to 3000 psi to activate firing head and monitor firing indications.
3.1. Perforation Runs

36. FIRING INDICATIONS:
1. Sudden pressure drop from 3000 psi to normal circulating pressure.
2. Instantaneous change in WT on martin decker.
3. Instantaneous increase in well head pressure.
4. Return will stop when ball in place, then back again once firing where ball opened
circulating path again.
5. Possible sound indication.
6. Possible oil in return.
• POH while pump out to surface (0.5 BPM, 40 fpm max, monitor pressure & confirm full
return) .
• Confirm BHA above tree, Close tree vertical valves.
• Bleed off pressure in riser to zero (on 100 psi stages, coil tbg pressure must be monitored
to ensure it is also being bleed off simultaneously with the riser pressure).
• Disconnect BOP, confirm gun is 100% fired or not.
• L/D TCP live gun assy #1.
3.1. Perforation Runs

37. • In Case the pressure in the CT does not bleed off simultaneously with the riser
• the guns must be run back to perforating depth and the CT pressure must be increased
until circulation is regained, either by the guns firing or bursting the rupture disc in motor
head assembly.
• Once circulation has been regained then a ball should be pumped down to open the
circulating sleeve in the motor assembly to increase the flow area before starting out of
hole.
• If it becomes necessary to run back to bottom and circulation cannot be established
between CT and annulus the operation should be halted until a path forward is agreed
upon by the customer and Halliburton management. TCP Global advisor should be
contacted immediately.
Contingency plan

38. • Safety Precautions for POOH:
• Circulation between the CT and annulus must be established and verified by TCP Eng. And
CT supervisor.
• While POOH and every 1000 ft. the coil must be stopped and circulation between the CT
and the annulus must be re-established and verified.
• At 200 ft. below surface circulation between the CT and the annulus must be re-
established and verified.
• when guns reached at surface in the riser and after closing the x-mass tree
• All personal should be cleared from within a 100 ft. radius from riser.
• To ensure there is no trapped pressure above firing head, the coil pressure should be
bleed off through the annulus. Begin bleeding the pressure in riser off slowly in
increments of 100 psi. the CT pressure must be monitored to ensure it is also being bleed
off simultaneously with the riser pressure.
Contingency plan

39. Guns sent to rig

42. Pressure profile for HAFH Jobs.
• When pumping down a ball to activate a HAFH, different pressure profiles may occur
depending upon many parameters including the sequence of the pumping operation and
the type of fluid being pumped.
• If the fluid being used to pump a ball down - hole is a liquid the expected pressure profile
should be similar to the diagram below

43. ACTUAL : 1st Firing Run

44. ACTUAL : 2nd Firing Run

45. Fired gun
After
Before
Gun swelling at shots positions

46. Issue #1
• RIH w/ SETCORE GR-CCL to 80 ft., found HALL mechanical depth counter & SETCORE
digital depth Encoder not reading, POH to surface, found SETCORE digital depth
encoder setting bolts touch Hall mechanical wheels stopping them from move, Re-
adjust bolts, all ok, POH to surface to re zero Depth counter.
Conclusion: before RIH, make sure that depth counter wheel is free to rotate without any
obstacle.
Issue #2
• RIH w/ SETCORE GR/CCL on coil Tbg, had tag w/ 1,000 lb. @ 13,456 ft. ORKB (1,384
ft. shallower than expected PBTD @ 14,840 FT ORKB based on depth counter)
• Download SETCORE logging data, correlate depth Using GR-CCL log dated mar, 30,
2010, correlated Tag depth @ 14,890 ft ORKB > Tag is confirmed correctly.
• Check OD of wheels for both counters, found Changed counter OD (4.17") and
installed counter OD (3.82")
Conclusion: make sure that depth counter wheel is of standard dimensions.
4. Lessons learned : Depth counter Issues

47. Counter wheel … make sure this is of
standard size and is completely free to rotate
4. Lessons learned : Depth counter Issues

48. • Best Practices for Hydraulic Actuator Firing Head Global Distribution Rev IADC
• Halliburton Perforating_Solutions_catalog
• coiled tubing- admarine 2
• PARADIGM® INDUSTRIES
References

49. KAMEL ELSAYED
DRILLING ENGINEER
SD RIG-141 TEAM
KAMELS@GUPCO.NET
0122 910 2341
THANKS FOR YOUR TIME
DON’T HESITATE TO CONTACT FOT ANY QUESTIONS
AYMAN RASHAD
WELLSITE LEADER
SD RIG-141 TEAM
RASHADAA@GUPCO.NET
010 65 717 313