Lessons Learned749

New report

Operator	Rig	Discipline / Origin	Project Phase	Well	Section	Date	What Happened
Wellesley 5843 – Wellesley	Deepsea Yantai	Drilling	Planning	35/10-10S Carmen	Intermediate section	20/06/2023	It was separated into two runs. The cup tester did not fit in the 9 7/8″ wearbushing installed in . . . Drilling Engineer / Morten Laget	PDF Edit
Wellesley 5842 – Wellesley	Deepsea Yantai	Drilling	Planning	35/10-10S Carmen	Intermediate section	20/06/2023	Had some stringer in the bottom of the 12 1/4″ Section and had to work the csg hgr w/seal assy up . . . Drilling Engineer / Morten Laget	PDF Edit
Wellesley 5841 – Wellesley	Deepsea Yantai	Drilling	Planning	35/10-10S Carmen	Intermediate section	20/06/2023	The CHSART was run with the pup sent out with the tool. Drilling Engineer / Morten Laget	PDF Edit
Wellesley 5840 – Wellesley	Deepsea Yantai	Drilling	Planning	35/10-10S Carmen	Intermediate section	20/06/2023	It was run according to tally. Drilling Engineer / Morten Laget	PDF Edit
Wellesley 5839 – Wellesley	Deepsea Yantai	Drilling	Operational	35/10-10S Carmen	Intermediate section	20/06/2023	The cement didn’t set up as expected. Drilling Engineer / Morten Laget	PDF Edit
Wellesley 5145 – Wellesley	Deepsea Yantai	Drilling	Operational	35/10-10S Carmen	Intermediate section	16/04/2023	FIT was a success. Shaved off 1.75 hrs compared to the test at 20″ shoe. 2.5 hrs vs 0.75 hrs. . . . Drilling Engineer / Morten Laget	PDF Edit
Wellesley 5141 – Wellesley	Deepsea Yantai	Drilling Own Experience	Operational	35/10-10S Carmen	Intermediate section	13/04/2023	Not approved pressure test. Downtime to drilling contractor. Drilling Engineer / Morten Laget	PDF Edit
Wellesley 5114 – Wellesley	Deepsea Yantai	Drilling	Operational	Eirik (OMV)	Intermediate section	30/03/2023	Experienced higher pore pressure earlier than expected. Had enough to weight up active from 1,44 to . . . Sander Schaathun / Morten Laget	PDF Edit
PGNiG 4841 – PGNiG	Deepsea Yantai	Drilling Own Experience	Operational	6608/1-1 S	Intermediate section	04/09/2022	Had to switch to a BX elevator Drilling Engineer / Morten Laget	PDF Edit
PGNiG 4762 – PGNiG	Deepsea Yantai	Drilling Own Experience	Planning	Copernicus	Intermediate section	22/08/2022	4-string contingency scenario was miscommunicated and we did not have the 13 3/8″ SSRII landing . . . Richard Mollison / Morten Laget	PDF Edit
INEOS 2300 – INEOS	Borgland Dolphin	Drilling Own Experience	Planning	6306/3-1 S Fat Canyon	Intermediate section	09/11/2021	Initial planned centralizer program of using 1 centralizer every other joint above shoetrack to top . . . Drilling Supervisor / Morten Laget	PDF Edit
INEOS 2280 – INEOS	Borgland Dolphin	Drilling Own Experience	Operational	6306/3-1 S Fat Canyon	Intermediate section	07/11/2021	Had initially many problems with Franks equipment that did not work, and cold windy weather outside . . . Drilling Supervisor / Morten Laget	PDF Edit
INEOS 2279 – INEOS	Borgland Dolphin	Drilling Own Experience	Planning	6306/3-1 S Fat Canyon	Intermediate section	07/11/2021	9 5/8″ float shoe filled up with mud. Drilling Supervisor / Morten Laget	PDF Edit
INEOS 2278 – INEOS	Borgland Dolphin	Drilling Own Experience	Operational	6306/3-1 S Fat Canyon	Intermediate section	07/11/2021	We had several faults on the Franks equipment. This led to troubleshooting, phone calls to town, . . . Drilling Supervisor / Morten Laget	PDF Edit
INEOS 2277 – INEOS	Borgland Dolphin	Drilling Own Experience	Operational	6306/3-1 S Fat Canyon	Intermediate section	07/11/2021	It took 4,25 hrs to rig it up on Borgland Dolphin. The rigging up of casing tong and FMS slips . . . Drilling Supervisor / Morten Laget	PDF Edit
INEOS 2276 – INEOS	Borgland Dolphin	Drilling Own Experience	Operational	6306/3-1 S Fat Canyon	Intermediate section	07/11/2021	Decided to use the Franks casing circulating tool FA-1 Drilling Supervisor / Morten Laget	PDF Edit
INEOS 2275 – INEOS	Borgland Dolphin	Drilling Own Experience	Operational	6306/3-1 S Fat Canyon	Intermediate section	06/11/2021	Had two bit trips with very low, down to 1 m/hr ROP Drilling Supervisor / Morten Laget	PDF Edit
INEOS 3407 – INEOS	Borgland Dolphin	Drilling Own Experience	Operational	PL937 Fat Canyon	Intermediate section	04/11/2021	ROP in 12 1/4″ section dropped to almost nothing at +/- 1900 m. Drilling parameters were varied, and . . . /	PDF Edit
INEOS 2269 – INEOS	Borgland Dolphin	Drilling Own Experience	Operational	6306/3-1 S Fat Canyon	Intermediate section	31/10/2021	ROP dropped from 50 m/hr to 1 m/hr Drilling Supervisor / Morten Laget	PDF Edit
DNO 2108 – DNO	Borgland Dolphin	Drilling Own Experience	Operational	2/5-15 Gomez	Intermediate section	05/09/2021	The PAB system failed before the cement job due to water ingress inside the unit which caused some . . . Drilling Supervisor / Morten Laget	PDF Edit

Lessons Learned749

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