Slot recovery operation for well J58-87, as a preparation of J58 platform to drill a new Extended-Reach Well SB293-4 Drilled by GULF OF SUEZ PETROLEUM CO. GUPCO Joint Venture with BP, EGYPT. 2013 @ Gulf of Suez, EGYPT.

1. Asset Life Extension Process
Platform Slot Recovery
GULF OF SUEZ PETROLEUM Co. GUPCO
KAMEL ELSAYED
DRILLING ENGINEER

2. Slot recovery on J58-82
Site preparation for SB293-4 ERD WELL
ST BAHARI-1 TEAM
As operators cope with
maturing fields and
challenging market
conditions, it has become
increasingly important to
manage and extend the life
of assets

3. CONTENTS
STAGE I :
SECURING THE STRING FOR CUTTING
STAGE II : MULTI STRING CUTTER
STAGE III : PULL THE CUT-OFF STRING
STAGE IV : CUTTING STRING INTO PIECES
STAGE V : P/U DCS

4. 1
1
Before start cutting the multi-string conductor,
we had to apply tension on the string so it
would come out easily when cutting is finished.
Applying tension would also make cutting faster.
We did that using CTU, C-plate and a spider
elevator

5. FIRST … WHAT IS A CTU ?!
CONDUCTOR TENSIONER UNIT
• A conductor tensioner unit is installed on an offshore jackup rig to apply
upward tension on the conductor.
• A Conductor Tensioning System consists of an elevated tensioning ring
pinned to and supported by hydraulic tensioning cylinders, each of which
are interconnected to a compensated hydraulic circuit employing bladder
type accumulators.
• When the cylinders are hydraulically extended to their mid-stroke, the
tensioning ring exerts a balanced upward pressure against a collar fitted
around the conductor, thereby imposing vertical tension on the conductor
string.

6. LARGE SKID-MOUNTED SPLIT CTU
TYPICAL SPECIFICATION
Tensioning capacity: 400 TON
Max. conductor diameter: 36”
(Adaptors available for smaller
conductor diameters)
Hydraulic cylinders: 8-Off (4-Off
per half)
Cylinder stroke: 610mm
Accumulators: Up to 11-Off
bladder type Nitrogen filled
Mode of travel: Slot and claw type
Skidding mechanism for travel
across CTP structure

7. WHAT IS A CTU ?!
Conductor Tensioning Unit
Cantilever
CTU, inside

8. STAGE #1: SECURING THE STRING FOR CUTTING
Removed the THS, then install 13-3/8” pulling tool onto the Braden head

9. STAGE #1: SECURING THE STRING FOR CUTTING
The C-plate supports the Spider elevator, which clamps on the pulling tool. Then the CTU pistons can be
extended to apply the desired amount of pulling force.
13-3/8” CSG
Pulling tool
CTU
Spider
Elevator
Hydraulic
Pistons
C-Plate
CTU

10. 2
2
Now that we have the enough tension on the
string to be cut, cutting operation can
commence.

11. STAGE #2: MULTI STRING CUTTER

12. STAGE #2: MULTI STRING CUTTER
MSC knives protruding from the 24” conductor due to eccentricity of casing strings

13. Note
Multi-String Cutter
MSC got stuck while trying to cut the rest of the 24” Conductor (due to
eccentricity)
After many trials of rotating and applying overpull, we were successful to pull the
MSC out with all knives recovered

14. STAGE #2: MULTI STRING CUTTER
Damaged knives after POH … and knives were stuck in place and back-loaded as it is .

15. Note
Multi-String Cutter
We think that knives got bent laterally due to high torque applied to them … not
because of the over pull or slack
As a result we couldn’t get the knives back in place and that why we had to put
extra pull to retract them.
The sides of the knives had peeled off while trying to retract knives into place.

16. STAGE #2: MULTI STRING CUTTER
The sides of the knives had peeled off while trying to retract knives into place.

17. STAGE #2: MULTI STRING CUTTER
We ran in hole again with new set of knives and could successfully cut thru.
Cut-off
string
CSG Stump
Eccentricity of CSG
strings is very clear

18. 3
Now we can recover the cut-off string to the
surface, but first we have to secure it.

19. STAGE #3: Pull the cut-off string
1- On the Production deck, Below the braden head, Cut window thru the 3 CSG strings and install a pin as a
securing pin (not to allow any string to slip off) and as a lifting pin as well.

20. STAGE #3: PULL THE CUT-OFF STRING
2- Remove the Spider Elevator and C-plate
3- Pull the string till the Braden head is above the rig floor

21. 4
Now we have to cut the string into smaller
pieces that can be handled and transported
We’re going do that using:
1- BORAIS Dual pin drill
&
2- BORAIS Guillotine pipe saw

22. Quick Note
DUAL PIN DRILL
• Dual Pin Drill with hydraulically-powered twin opposed drills are used to
prepare cut sections of casing for securing and rigging.
• Dual Pin Drill incorporates two opposed drills on a mounting frame for drilling
precisely aligned holes through which bolts or pins can be inserted to secure
multiple-layered casings. Holes up to 4” can be drilled.

23. BORAIS DUAL HOLE DRILLING MACHINE

24. BORAIS DUAL HOLE DRILLING MACHINE IN ACTION

25. STAGE #4: CUTTING STRING INTO PIECES
Carbide inserts
Cut-off pieces due to hole drilling
24”
13-3/8”
9-5/8”

26. Quick Note
GUILLOTINE PIPE SAW
• Designed to cold cut 16” to 32” pipe of all materials, as well as solids , and
multi-stranded casing strings, can work in sub-sea conditions.
• It has Auto-clamp & Auto-feed features.
• A 16” diameter 3/4” wall steel pipe is cut in only 24 minutes.
• A 32” diameter multi-stranded casing string is cut in about 48 minutes.

27. BORAIS GUILLOTINE PIPE SAW

28. STAGE #4: CUTTING STRING INTO PIECES
Cut-off the first joint by BORAIS Guillotine pipe saw, and L/D on cantilever

29. STAGE #4: CUTTING STRING INTO PIECES
Securing Pins … is inserted into the drilled hole to prevent any of the casing string of slipping off.
It’s also secured by welding and wedges preparing for backload

30. 5
P/U DCS parts and weld it on rig floor

31. 5-7/8” VX-57 DRILL PIPES
XO 4-1/2” IF PIN x 5-7/8” VX-57 BOX
XO 30” XLF PIN x 4-1/2” IF BOX
2 x 30” XLF CONDUCTOR JOINTS
STAGE #5: P/U DCS
DCS ASSEMBLY
XLF BOX THREAD
DCS PART #2
ALL WELDED
DCS PART #1
BLIND BTM WITH SPIKES

32. STAGE #5: STAGE #5: P/U DCS
DCS part #1

33. STAGE #5: P/U DCS
Blind end with spikes that will grip into sea bed and prevent DCS movement with sea current

34. 6
WAIT ON WEATHER TO RUN WITH ROV TO
ENSURE AREA AROUND OLD CASING STUMP
IS CLEAR FROM ANY DEBRIS
WAIT ON WEATHER TO RUN WITH DCS

35. Forward Plan
Production deck
Cellar deck
After Running with the
DCS, orienting it in the
new well direction, it
should be secured to the
platform by clamps to the
cellar deck and the
production deck, then
cold-cut the DCS just
above the production
deck
Later after the rig leaves
the platform, other
clamps can be installed on
the subsea bracings.

36. THANKS FOR YOUR TIME
KAMEL ELSAYED
DRILLING ENGINEER
BAHARI-1 RIG TEAM
BELLIHYKE@GUPCO.NET
0122 910 2341