Transcript ICC Presentation - Wellheadservices.net

Present Procedure
for cutting stuck casing on
Drilling PLATFORM
•Present Procedure
In the event, that we are unable to land off,
the14”casing string on its Mandrel Casing
hanger, the following steps will need to be
performed.
Present Procedure for cutting stuck casing
1. Run 14” casing.
2. Cement the 14” casing string in place.
3. Wait on Cement.
4. Remove any excess casing that may be sticking up
above the rig floor. (cut # ?)
5. Ensure that the appropriate scaffolding is erected to allow work to
be conducted safely. e.g. Breaking the connection under the BOP
6. Break the connection between the bottom of the BOP stack and
the top of the 18 ¾” 10K riser assembly.
7. Lift the BOP assembly 2-3ft off the top of the riser.
using the BOP crane/Hoist system.
Present Procedure for cutting stuck casing
8. Install the external casing cutting machine under the B.O.P to
perform an external cut on the 14” or 10 ¾” casing string, Note
the cut is to be made above the top of the upper Cameron 18 ¾”
10K hub top adaptor.
(cut # 1)
•
Associated Risk
•
Failure of BOP lifting devices
•
Personnel will need to work under
suspended load
9. Drilling holes in to the casing to remove SBM.
.
•
Associated Risk
•
Failure of BOP lifting devices
•
Personnel will need to work under
suspended load
Present Procedure for cutting stuck casing
10. Remove the cutting tools. Lower the BOP assy on to the top of
the Cameron 18 ¾” adaptor and secure same.
11. Lay out the 14” or 10 ¾” casing stub.
12. Remove the BOP stack and place it, on to the BOP test
stump.
13. Drill adequate holes in 14” casing and attach individual lifting
slings. One set on to the top of the 18 ¾” riser assembly and
another set to the 14” casing string (simultaneously).
14. Calculate the length of 14” casing from the top of the wellhead
to the rig Floor an support its weight
15. Break the connection between the bottom of the riser and the
top of the Wellhead assembly.
Present Procedure for cutting stuck casing
16. Lift the riser assembly 2-3ft, off the top of MB wellhead
assembly and install the18 ¾” x 14” Emergency slips.
17. Install the external casing cutting machine under the riser and
cut the 14” or 10 ¾” casing string above the top of the
wellhead NT2 connection (cut # 2)
18. Remove the external casing cutting tools and lower the 18 ¾”
riser assy on to the top of the MB wellhead.
19. Lay out the 14” or 10 ¾” casing stub.
20. Lift the 18 ¾” riser assembly and lay out.
21. Install the wellhead NT2 adaptor and ICC machine.
22. Cut the 14” or 10 ¾” casing string below the top of the MB wellhead assy
as per procedure (cut #3)
Present Procedure for cutting stuck casing
1. Run 14” casing string.
2. Cement 14” casing string in
place
3. Waiting on Cement
4. Ensure that the appropriate
scaffolding is erected to allow
work to be conducted safely. e.g.
5. Break Connection under
BOP
6. Left BOP ASSY to
perform the first cut
• Associated Risk
7. Install External casing
cutter to perform the
first cut
•
Failure of BOP lifting devices
•
Personnel will need to work
under suspended load
8. Lift Casing stub and lay
out
9. Place BOP on test
stump.
10. Remove the casing
cutter and secure.
11. Drill Holes in casing OD to
Install lifting devise
Eg: Cameron fast loc
Connector @ BTM of
B.O.P
12. Lower lifting slings and
connect to 14” casing.
13. Lower lifting slings and connect
to 18 ¾” Riser assy.
14. Break NT2 connector located @
Wellhead MB Assy
15. lifting the 18 ¾” Riser assy to
access the 14 casing.
16. Install 18 ¾” x 14” Emergency
Slips
17. Install 14” casing cutter to
perform 2nd cut on 14”.
18. Remove casing cutter
form OD of casing and
secure.
19. Lift second 14” casing
stub and lay out.
20. Lift 18 ¾” Riser assy and
remove.
Risk of personnel working
under load.
Ie: Top of Vetco Gray wellhead
21. Install NT2 Adaptor Plate
required to perform Internal cut
on 14”.
22. Install ICC machine on to
pin adaptor
23. Perform all necessary
check and perform the
internal cut on the 14” .
24. Remove 14” casing stub
together with ICC and Lay
out. .
25. Remove NT2 Adaptor
Plate and Lay out. .
Top of Vetco Gray wellhead
Why use an Alternative Internal Casing Cutting Machine (ICC)
for Cutting Stuck Casing ?
a)
This will eliminate the risk of personnel having to work under suspended
loads.
b) This option will also eliminate the need to perform a second external cut on
the casing string.
Steps
1. Run and cement the 14” casing string in place
2. Remove any excess casing, that may be sticking up, above the
rig floor (cut # ?)
3. Rig up ICC contingency cutting tools.
4. RIH with ICC Machine and perform an Internal cut, ±12in
above the top of the MB wellhead assembly. Cut # 1
5. Retrieve the ICC and lay out the14” casing stub.
6. Remove the BOP stack and place it on to the test stump.
7. Attach appropriate lift slings to the riser assembly, break the
connection between the bottom of the riser and the top MB
Wellhead assembly.
Alternative ICC for cutting stuck casing on
8. Lift the riser assembly off the top of MB wellhead
assembly and Lay out.
Eliminate the risk of personnel working under suspended Riser to cut casing
9. Install the internal casing cutting machine and cut the 14” casing string
below the top of the MB wellhead assy as per procedure (Final cut, # 2)
10. Run 14” casing string.
11. Cement 14” casing string in place
12. Run ICC while Waiting on Cement
13. Ensure that the appropriate scaffolding
is erected to allow work to be conducted
safely.
14. Install 14” casing cutter to
perform first cut on 14”.
15. Remove casing cutter
form ID of casing and
secure.
16. Lift the14” casing stub and
lay out.
No risk of personnel
working under load.
N/D The Down The BOP Stack
17. Ensure that the appropriate
scaffolding is erected to allow work
to be conducted safely.
18. Break Connection
under BOP
19. Lift BOP stack assy and place on stump.
• Risk of personnel working
under load mitigated
•
Personnel will not need to work
under suspended load
N/D The Down The Riser Assy
20. Lower lifting slings and
connect to 18 ¾” Riser assy.
21. Break NT2 connector located
@ the top of the MB Assy
22. lifting the 18 ¾” Riser assy to
access the 14 casing.
No risk of personnel
having to working under
load. To cut casing
23. Install NT2 Adaptor Plate
required to perform Internal cut
on 14”.
24. Install ICC machine on to
pin of adaptor
25. Perform all necessary
check and perform the
internal cut on the 14” .
26. Remove ICC and casing
stub.
27. Remove the NT2 X Flange
Adaptor
Top of Vetco Gray wellhead
Concerns or Questions
Slips
Installed
1. Will the casing string need to be held in
Tension BEFORE performing the cut ?
. YES.
18 ¾” Riser
assy
2. Will the Blades cut in to the ID of the
Riser assy, while performing the cut
on the casing string. ?
Top of Vetco Gray wellhead
Position of the Cutting Blades before Modifying
Center Line of
Bolt Hole
Casing OD
ID of Riser
Distance between
casing OD & Riser ID
Original Blade
length
Reduce blade
the length
Drill new holes
Position of the Cutting Blades before & After Modifying
Center Line of
Bolt Hole
Cut Blade
Shorter
Casing OD
Blade Position
Beyond Casing OD
Drill new Hole
to Modified
Blades
Position of Blades after
Modification @ ¾”
Position of the Cutting Blades After Modifying
Center Line of
Bolt Hole
Casing OD
Install mod. Blade
secure blade
Bolt hole for
blades
Position of the cutting blades prior to RIH
Position of the Cutting Blades before Modifying
Casing OD
Max
Set Spacing
with ¼”
@
Spacing
¾”
Cutting Blades
at Full length
Blade Exceeding
casing OD @ .75”
Position of the Cutting Blades after Modifying
Casing OD
Max
Set Spacing
with ¼”
@
Spacing
¾”
Blade Exceeding
casing OD after Mod.
How to Center the ICC within the ID of the Casing
Casing OD
Cutting
Blades
Hydraulically
operated
legs
Performing the Internal cut after Modifying the
Blades.
0
0
1
7
5
2
0 1
Counter @ Rig Floor
• The number of Rotation
will be Monitored at the
Rig Floor
ICC casing range design
ICC design data
MACHINING FUNCTION: Internally mounted pipe/
casing cut-off with dual
tool post and remote
control panel.
MOUNTING SYSTEM: 3-jaw, hydraulic actuated
universal chuck.
TOOLING: Carbide Insert & Holder
TOOL POST SYSTEM: Twin, continuous feed 60
degree, Hardened and
Ground Dovetail type with
dual parting blades.
FEED RATE: Continuous worm drive
feed @ .002” (.1016mm)
per revolution.
DRIVE SYSTEM: Gear Drive
POWER: Hydraulic, 6-7 gpm @
2000 psi
CONTROLS: Remote control panel (with pedistal mount with independent clamp
& spindle controls, pressure controls and tool position meter.
DIMENSIONS: 8-1/2” (215.9 mm) O.D. x 13-1/2” (342.9 mm) long
WEIGHT: 50 lbs. (23 kgs.)