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Lessons Learned

Lessons Learned865

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Operator Rig Discipline / Origin Project Phase Well Section Date What Happened

PGNiG
4830 – PGNiG

 		Deepsea Yantai Marine
Own Experience		 Operational 6608/1-1 S
Copernicus		 Rig move 29/08/2022 All tubulars were backloaded from the rig and mud and bulk tanks emptied. The rig was deballasted to . . .

Phil Hardy / Morten Laget


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PGNiG
4831 – PGNiG

 		Deepsea Yantai Drilling Operational 6608/1-1 S
Copernicus		 29/08/2022 When the conductor was lowered to the seabed it was realised that a blanking plate from the Wellhead . . .

Phil Hardy / Morten Laget


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PGNiG
396 – PGNiG

 		Deepsea Nordkapp Drilling Operational 6507/5-9 S, 6507/5-9 A
Shrek		 N/A 13/03/2020 More slops backloaded than planned using Halliburton BSS. Amount of slop backloaded; 836 m3 + 200 m3 . . .


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PGNiG
342 – PGNiG

 		Deepsea Nordkapp Drilling Operational 6507/5-9 S, 6507/5-9 A
Shrek		 Pilot hole section 22/10/2019 BHA modules coming out with various lifting subs.


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PGNiG
361 – PGNiG

 		Deepsea Nordkapp Drilling Operational 6507/5-9 S, 6507/5-9 A
Shrek		 Production section 22/10/2019 Cement stand is big and difficult to handle. Time consuming to rack back and lay out. Cement stand . . .


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PGNiG
372 – PGNiG

 		Deepsea Nordkapp Drilling Operational 6507/5-9 S, 6507/5-9 A
Shrek		 Reservoir section 22/10/2019 Problems with gas readings from gas trap with flow less than 2000 lpm. Gas trap installed in flow . . .


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PGNiG
380 – PGNiG

 		Deepsea Nordkapp Drilling Operational 6507/5-9 S, 6507/5-9 A
Shrek		 Reservoir section 22/10/2019 Circulating after releasing 9-5/8” hgr.


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PGNiG
381 – PGNiG

 		Deepsea Nordkapp Drilling Operational 6507/5-9 S, 6507/5-9 A
Shrek		 Reservoir section 22/10/2019 Circulating beneath annular for potential gas (ie on pulling seal assy)


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PGNiG
383 – PGNiG

 		Deepsea Nordkapp Drilling Operational 6507/5-9 S, 6507/5-9 A
Shrek		 Production section 22/10/2019 Had to stop operations to fix a leak in TDX s-pipe connection – 2x o-rings.


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PGNiG
384 – PGNiG

 		Deepsea Nordkapp Drilling Operational 6507/5-9 S, 6507/5-9 A
Shrek		 Production section 22/10/2019 NOV software did not include the PGNiG well so PGNiG personnel unable to see it – only seen in . . .


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PGNiG
337 – PGNiG

 		Deepsea Nordkapp Drilling Operational 6507/5-9 S, 6507/5-9 A
Shrek		 Top hole 21/10/2019
When running conductor 0.5 m higher stick-up was observed.
Base plan was to hold the conductor . . .


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PGNiG
338 – PGNiG

 		Deepsea Nordkapp Drilling Operational 6507/5-9 S, 6507/5-9 A
Shrek		 Top hole 21/10/2019
Slow ROP with 36″ x 42″ BHA, due to keeping neutral point below seabed, it limited the drilling . . .


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PGNiG
339 – PGNiG

 		Deepsea Nordkapp Drilling Operational 6507/5-9 S, 6507/5-9 A
Shrek		 Top hole 21/10/2019 Rigged up for conductor running, extra 20 ft mobilized for the operation.


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PGNiG
340 – PGNiG

 		Deepsea Nordkapp Drilling Operational 6507/5-9 S, 6507/5-9 A
Shrek		 Pilot hole section 21/10/2019 BHAs racked offline; very tight tolerances with racking boards and stabilizers etc. Same crew that . . .


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PGNiG
341 – PGNiG

 		Deepsea Nordkapp Drilling Operational 6507/5-9 S, 6507/5-9 A
Shrek		 Pilot hole section 21/10/2019 Debris and cuttings could congregate around the subsea WHIM as cuttings would not go to surface . . .


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