Lessons Learned749

New report

Operator	Rig	Discipline / Origin	Project Phase	Well	Section	Date	What Happened
DNO 5911 – DNO	Deepsea Yantai	Drilling	Operational	25/7-11 S Norma	Reservoir section	05/09/2023	Time drill to initiate KO with 2 m/hr. Good performance kicking off from mainbore, no problems Drilling Engineer / Morten Laget	PDF Edit
DNO 5909 – DNO	Deepsea Yantai	Drilling	Operational	25/7-11 S Norma	P&A	05/09/2023	Due to high percentage of gas in the mud return the interface had to go over the shaker system and . . . Drilling Engineer / Morten Laget	PDF Edit
DNO 5906 – DNO	Deepsea Yantai		Operational	25/7-11 S Norma	Reservoir section	03/09/2023	The primary MDT tool and BU failed. A additional MDT tool was mobilized from Deepsea Stavanger. Drilling Engineer / Morten Laget	PDF Edit
DNO 5872 – DNO	Deepsea Yantai	Drilling Own Experience	Operational	25/7-11 S Norma	Surface section	07/08/2023	the ROP is very slow ( 1-2 m/hr) after drilling approximately 1500 meters using XZ816 PDC bit. . . . Drilling Engineer / Morten Laget	PDF Edit
DNO 5867 – DNO	Deepsea Yantai	Subsurface Own Experience	Operational	25/7-11 S Norma	Surface section	30/07/2023	New version of the Gravitas earlier used. The WSG not used to the new version. Drilling Engineer / Morten Laget	PDF Edit
DNO 5864 – DNO	Deepsea Yantai	Drilling Own Experience	Operational	25/7-11 S Norma	BOP running	30/07/2023	Used two ROVs to guide the BOP on top of WHH. No problems. Drilling Engineer / Morten Laget	PDF Edit
DNO 5859 – DNO	Deepsea Yantai	Drilling Own Experience	Operational	25/7-11 S Norma	Top hole	30/07/2023	Drawwork in landing mode. No change in hookload while cementing and displacing. Drilling Engineer / Morten Laget	PDF Edit
DNO 5855 – DNO	Deepsea Yantai	Drilling Own Experience	Operational	25/7-11 S Norma	Top hole	30/07/2023	After the 30″ conductor shoe was drilled the inclination of the conductor increased. Used the WHRT . . . Drilling Engineer / Morten Laget	PDF Edit
DNO 5854 – DNO	Deepsea Yantai	Drilling Own Experience	Operational	25/7-11 S Norma	Top hole	30/07/2023	When checking for cement outside the condcutor there was no cement to be found on 3/4 of the sides. . . . 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 5124 – Wellesley	Deepsea Yantai	Drilling	Operational	35/10-10S Carmen	Surface section	10/04/2023	Run mud mat with buoyancy marker. Mud mat covered in soil after completing RMR operation Drilling Engineer / Morten Laget	PDF Edit
PGNiG 4923 – PGNiG	Deepsea Yantai	Logistics Own Experience	Planning	6608/1-1 S Copernicus	Other	03/10/2022	With this focus the mobilization plan became a live document and with a weekly focus, ensuring all . . . Johan Kjos-Hanssen / Morten Laget	PDF Edit
PGNiG 4913 – PGNiG	Deepsea Yantai	Drilling	Operational	6608/1-1 S Copernicus	P&A	23/09/2022	When pulling the conductor there was no cement stuck to it due to use of protane wrapping on the . . . Drilling Engineer / Morten Laget	PDF Edit
PGNiG 4921 – PGNiG	Deepsea Yantai	Logistics Own Experience	Operational	6608/1-1 S Copernicus	Other	20/09/2022	Due to late busy vessel schedule of PSV and MI Swaco vessel MS Norbar, mud for 8-1/2″ Section was . . . Johan Kjos-Hanssen / Morten Laget	PDF Edit
PGNiG 4922 – PGNiG	Deepsea Yantai	Logistics Own Experience	Operational	6608/1-1 S	N/A	12/09/2022	Captain of the vessel suggested to use the Brine tank for the Premix as Premix does not contain . . . Johan Kjos-Hanssen / Morten Laget	PDF Edit
PGNiG 4844 – PGNiG	Deepsea Yantai	Marine Own Experience	Operational	6608/1-1 S Copernicus	Top hole	09/09/2022	Everything went according to plan and logging was done remotely. Final position report was delivered . . . Stian Engvik / Morten Laget	PDF Edit
PGNiG 4843 – PGNiG	Deepsea Yantai	Marine Own Experience	Operational	6608/1-1 S Copernicus	Rig move	09/09/2022	Bridge and marine reps was not informed from DSV or DE when required spud equipment was taken . . . Stian Engvik / Morten Laget	PDF Edit
PGNiG 4842 – PGNiG	Deepsea Yantai	Marine Own Experience	Operational	6608/1-1 S Copernicus	Rig move	09/09/2022	Marine reps identified possibility to start transit 2hrs before de-ballasting was completed. This . . . Stian Engvik / Morten Laget	PDF Edit
PGNiG 4840 – PGNiG	Deepsea Yantai	Logistics Own Experience	Operational	6608/1-1 S Copernicus	Top hole	04/09/2022	With good planning and cooperation, everything shipped to SSJ prior to operation start in due time. . . . Johan Kjos-Hanssen / Morten Laget	PDF Edit
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	PDF Edit

Lessons Learned749

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