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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.

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Presentation on theme: "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."— Presentation transcript:

1 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 on Drilling PLATFORM Present Procedure

2 Present Procedure for cutting stuck 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 # ?) 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. 5. Ensure that the appropriate scaffolding is erected to allow work to be conducted safely. e.g. Breaking the connection under the BOP 1. Run 14” casing.

3 Present Procedure for cutting stuck casing Associated Risk 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) 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

4 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. 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). 12. Remove the BOP stack and place it, on to the BOP test stump. 15. Break the connection between the bottom of the riser and the top of the Wellhead assembly. 14. Calculate the length of 14” casing from the top of the wellhead to the rig Floor an support its weight

5 Present Procedure for cutting stuck casing 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. 21.Install the wellhead NT2 adaptor and ICC machine. 20. Lift the 18 ¾” riser assembly and lay out. 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) 16. Lift the riser assembly 2-3ft, off the top of MB wellhead assembly and install the18 ¾” x 14” Emergency slips. 22. Cut the 14” or 10 ¾” casing string below the top of the MB wellhead assy as per procedure (cut #3)

6 2. Cement 14” casing string in place 1. Run 14” casing string. 3. Waiting on Cement 5. Break Connection under BOP 4. Ensure that the appropriate scaffolding is erected to allow work to be conducted safely. e.g. 7. Install External casing cutter to perform the first cut 6. Left BOP ASSY to perform the first cut 8. Lift Casing stub and lay out 9. Place BOP on test stump. Associated Risk Failure of BOP lifting devices Personnel will need to work under suspended load 10. Remove the casing cutter and secure. 11. Drill Holes in casing OD to Install lifting devise Present Procedure for cutting stuck casing Eg: Cameron fast loc BTM of B.O.P

7 12. Lower lifting slings and connect to 14” casing. 13. Lower lifting slings and connect to 18 ¾” Riser assy. 15. lifting the 18 ¾” Riser assy to access the 14 casing. 14. Break NT2 connector Wellhead MB Assy

8 Risk of personnel working under load. 17. Install 14” casing cutter to perform 2 nd cut on 14”. 19. Lift second 14” casing stub and lay out. 18. Remove casing cutter form OD of casing and secure. 20. Lift 18 ¾” Riser assy and remove. Ie: Top of Vetco Gray wellhead 16. Install 18 ¾” x 14” Emergency Slips

9 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 Remove NT2 Adaptor Plate and Lay out.. Top of Vetco Gray wellhead

10 Why use an Alternative Internal Casing Cutting Machine (ICC) for Cutting Stuck Casing ? 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. 6. Remove the BOP stack and place it on to the test stump. 4.RIH with ICC Machine and perform an Internal cut, ±12in above the top of the MB wellhead assembly. Cut # 1 7. Attach appropriate lift slings to the riser assembly, break the connection between the bottom of the riser and the top MB Wellhead assembly. 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 5.Retrieve the ICC and lay out the14” casing stub.

11 Eliminate the risk of personnel working under suspended Riser to cut casing Alternative ICC for cutting stuck casing on 8. Lift the riser assembly off the top of MB wellhead assembly and Lay out. 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)

12 11. Cement 14” casing string in place 10. Run 14” casing string. 12. Run ICC while Waiting on Cement 13. Ensure that the appropriate scaffolding is erected to allow work to be conducted safely.

13 No risk of personnel working under load. 14. Install 14” casing cutter to perform first cut on 14”. 16. Lift the14” casing stub and lay out. 15. Remove casing cutter form ID of casing and secure.

14 19. Lift BOP stack assy and place on stump. 18. Break Connection under BOP 17. Ensure that the appropriate scaffolding is erected to allow work to be conducted safely. Risk of personnel working under load mitigated Personnel will not need to work under suspended load N/D The Down The BOP Stack

15 20. Lower lifting slings and connect to 18 ¾” Riser assy. 22. lifting the 18 ¾” Riser assy to access the 14 casing. 21. Break NT2 connector the top of the MB Assy N/D The Down The Riser Assy

16 No risk of personnel having to working under load. To cut casing

17 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

18 Concerns or Questions 1. Will the casing string need to be held in Tension BEFORE performing the cut ? 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 Slips Installed 18 ¾” Riser assy. YES.

19 Casing OD Position of the Cutting Blades before Modifying Original Blade length Distance between casing OD & Riser ID Reduce blade the length Drill new holes ID of Riser Center Line of Bolt Hole

20 Casing OD Position of the Cutting Blades before & After Modifying Blade Position Beyond Casing OD Position of Blades after ¾” Drill new Hole to Modified Blades Center Line of Bolt Hole Cut Blade Shorter

21 Casing OD Position of the Cutting Blades After Modifying secure blade Install mod. Blade Center Line of Bolt Hole Bolt hole for blades

22 Position of the cutting blades prior to RIH

23 Set with ¼” Spacing Max ¾” Casing OD Position of the Cutting Blades before Modifying Cutting Blades at Full length Blade Exceeding casing

24 Set with ¼” Spacing Max ¾” Casing OD Position of the Cutting Blades after Modifying Blade Exceeding casing OD after Mod.

25 Cutting Blades Casing OD How to Center the ICC within the ID of the Casing Hydraulically operated legs

26 Performing the Internal cut after Modifying the Blades Rig Floor The number of Rotation will be Monitored at the Rig Floor

27 ICC casing range design

28 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 (.1016mm) per revolution. DRIVE SYSTEM: Gear Drive POWER: Hydraulic, 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.)


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