Present Procedure for cutting stuck casing on Drilling PLATFORM 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. 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)

Eg: Cameron fast loc Connector @ BTM of B.O.P 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 Associated Risk 6. Left BOP ASSY to perform the first cut Failure of BOP lifting devices Eg: Cameron fast loc Connector @ BTM of B.O.P 7. Install External casing cutter to perform the first cut 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

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.

17. Install 14” casing cutter to perform 2nd cut on 14”. 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. . Top of Vetco Gray wellhead 25. Remove NT2 Adaptor Plate and Lay out. .

Why use an Alternative Internal Casing Cutting Machine (ICC) for Cutting Stuck Casing ? This will eliminate the risk of personnel having to work under suspended loads. 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. RIH with ICC Machine and perform an Internal cut, ±12in above the top of the MB wellhead assembly. Cut # 1 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. Top of Vetco Gray wellhead 27. Remove the NT2 X Flange Adaptor

Concerns or Questions Slips Installed 18 ¾” Riser assy 1. Will the casing string need to be held in Tension BEFORE performing the cut ? 18 ¾” Riser assy . YES. 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 Casing OD Blade Position Beyond Casing OD Cut Blade Shorter Drill new Hole to Modified Blades Position of Blades after Modification @ ¾”

Center Line of Bolt Hole 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

Blade Exceeding casing OD @ .75” Position of the Cutting Blades before Modifying Casing OD Max Spacing @ ¾” Set with ¼” Spacing Cutting Blades at Full length Blade Exceeding casing OD @ .75”

Blade Exceeding casing OD after Mod. Position of the Cutting Blades after Modifying Max Spacing @ ¾” Set with ¼” Spacing Casing OD 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. 1 7 1 5 2 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.)