Lessons Learned749

New report

Operator	Rig	Discipline / Origin	Project Phase	Well	Section	Date	What Happened
DNO 5866 – DNO	Deepsea Yantai	Drilling Own Experience	Planning	25/7-11 S Norma	Surface section	30/07/2023	Difficulties with logistics to separate the joints below 11.5 m and the joints longer due to limited . . . Drilling Engineer / Morten Laget	PDF Edit
DNO 5860 – DNO	Deepsea Yantai	Drilling Own Experience	Planning	25/7-11 S Norma	Top hole	30/07/2023	One of the stop collars fell of when it was picked up from the boat. When laying down the . . . 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 5837 – Wellesley	Deepsea Yantai	Drilling Own Experience	Operational	35/10-10S Carmen	Surface section	16/06/2023	Pups could not be run from aux using the “handshake” technique (too short for the Hydraracker) and . . . Drilling Engineer / Morten Laget	PDF Edit
Wellesley 5836 – Wellesley	Deepsea Yantai	Drilling Own Experience	Planning	35/10-10S Carmen	Top hole	16/06/2023	The casing string run was a mixed string of VAM TOP and VAM 21 with VAP TOP run first. This meant . . . Drilling Engineer / Morten Laget	PDF Edit
Wellesley 5835 – Wellesley	Deepsea Yantai	Drilling Own Experience	Planning	35/10-10S Carmen	Surface section	16/06/2023	Crossovers supplied were of very different lengths: 4m, 6m and 12m. Drilling Engineer / Morten Laget	PDF Edit
Wellesley 5157 – Wellesley	Deepsea Yantai	Drilling Own Experience	Operational	35/10-10S Carmen	Production section	24/04/2023	It was done before the cementer got the change to da a pre-job check / install bypass baffle etc. Drilling Engineer / Morten Laget	PDF Edit
Wellesley 5140 – Wellesley	Deepsea Yantai	Drilling	Operational	35/10-10S Carmen	Surface section	13/04/2023	NPT: 0.75 hrs Cost: 156 250 NOK Observed poor make-up of jt #204 into jt #111: – No shoulder . . . Drilling Engineer / Morten Laget	PDF Edit
Wellesley 5139 – Wellesley	Deepsea Yantai	Drilling	Operational	35/10-10S Carmen	Surface section	13/04/2023	NPT: 1.25 hrs Cost: 260 417 NOK Performed mechanical repair on make/break cylinder on casing . . . Drilling Engineer / Morten Laget	PDF Edit
Wellesley 5131 – Wellesley	No Rig	Drilling	Operational	No well	Surface section	10/04/2023	Difficulties passing 20″ CSG shoe through FMS. Engaged CRTi and pushed through. Drilling Engineer / Morten Laget	PDF Edit
Wellesley 5122 – Wellesley	Deepsea Yantai	Drilling	Operational	35/10-10S Carmen	Surface section	09/04/2023	The shoetrack was made up to 27,500 ft.lbs. Drilling Engineer / Morten Laget	PDF Edit
Wellesley 5121 – Wellesley	Deepsea Yantai	Drilling	Operational	35/10-10S Carmen	Surface section	09/04/2023	Did not observe a shoulder making the casing up to 27 500 ft-lbs. Drilling Engineer / Morten Laget	PDF Edit
Wellesley 5115 – Wellesley	Deepsea Yantai	Drilling	Operational	Eirik (OMV)	Production section	30/03/2023	If we are leaning to one of the sides it is easy to hang up in something which can result in a . . . 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
Wellesley 2325 – Wellesley	Borgland Dolphin	Drilling Own Experience	Operational	36/1-4 Hemispheres	Top hole	24/12/2021	The deck-crew on days started to lay out slick joints in one bay before a crew change happened in . . . Drilling Engineer / Morten Laget	PDF Edit
Wellesley 2321 – Wellesley	Borgland Dolphin	Drilling Own Experience	Operational	36/1-4 Hemispheres	Top hole	23/12/2021	o At 281m conductor couldn’t pass due to the tight spot observed when drilling there. Attempted to . . . Drilling Engineer / Morten Laget	PDF Edit
INEOS 2320 – INEOS	Borgland Dolphin	Drilling Own Experience	Operational	6306/3-1 S Fat Canyon	Production section	09/12/2021	Managed to barely land the casing in very sticky clay. Since the mainbore 9 5/8″ casing became . . . Steinar Aarnes / Morten Laget	PDF Edit
INEOS 2318 – INEOS	Borgland Dolphin	Drilling Own Experience	Operational	6306/3-1 S Fat Canyon	Production section	09/12/2021	The used 9 5/8″ casing was run quite smoothly. Not a single joint rejected, and Frank’s tongs . . . Steinar Aarnes / Morten Laget	PDF Edit
INEOS 2302 – INEOS	Borgland Dolphin	Drilling Own Experience	Operational	6306/3-1 S Fat Canyon	Production section	10/11/2021	Went down with 9 5/8″ cutters and cut the casing, observed 75 bar pressure drop and torque drop to . . . Drilling Engineer / Morten Laget	PDF Edit
INEOS 2214 – INEOS	Borgland Dolphin	Drilling Own Experience	Operational	6306/3-1 S Fat Canyon	Top hole	10/10/2021	It happened as planned. However, a suggestion of improvement was proposed. Drilling Engineer / Morten Laget	PDF Edit

Lessons Learned749

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