WE Report

Lessons Learned

Lessons Learned865


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

Wellesley
256 – Wellesley

Transocean Arctic Drilling Operational 35/4-2
Songesand
Production section 16/06/2020 The cement slurry for the 9 5/8″ casing was thick/sticky and caused cement pump suction problems . . .


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Wellesley
257 – Wellesley

Transocean Arctic Drilling Operational 35/4-2
Songesand
Reservoir section 16/06/2020 Drilled 2 x wiper plugs and landing collar in 45 minutes using a milled tooth rock bit. 300 litres . . .


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Wellesley
258 – Wellesley

Transocean Arctic Drilling Operational 35/4-2
Songesand
Reservoir section 16/06/2020 The mud engineer made a good displacement plan for displacing the well from SW to 1.25 sg mud. The . . .


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Wellesley
259 – Wellesley

Transocean Arctic Drilling Operational 35/4-2
Songesand
Reservoir section 16/06/2020 The cold temperature in the riser and 300 m below seabed made the WBM more viscous than under normal . . .


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Wellesley
260 – Wellesley

Transocean Arctic Drilling Operational 35/4-2
Songesand
Reservoir section 16/06/2020 Noticed several times that “slugs” of cuttings would reach the shakers for no good reason.


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Wellesley
261 – Wellesley

Transocean Arctic Drilling Operational 35/4-2
Songesand
P&A 16/06/2020 After unlatching the BOP we forgot to remove the AX ring from the wellhead prior to pulling the BOP. . . .


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Wellesley
262 – Wellesley

Transocean Arctic Drilling Operational 35/4-2
Songesand
P&A 16/06/2020 The Weatherford MOST tool was successfully used in rotary mode. The tool was dressed such that the . . .


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Wellesley
263 – Wellesley

Transocean Arctic Drilling Operational 35/4-2
Songesand
P&A 16/06/2020 As on all previous wells, with the well displaced to seawater and wellhead cutting operations . . .


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Wellesley
264 – Wellesley

Transocean Arctic Drilling Operational 35/4-2
Songesand
N/A 16/06/2020 Have been lucky all campaign not to have had any problems with the Halliburton OBM cuttings blower.


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Wellesley
265 – Wellesley

Transocean Arctic Drilling Operational 25/1-13
Balcom
P&A 16/06/2020 Unable to run Weatherford 9 5/8″ casing cuting assembly past wellhead. Found out that spiral . . .


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Wellesley
1188 – Wellesley

Borgland Dolphin Marine
PSA Q&A
Planning 6204/11-3
Schweinsteiger
N/A 15/06/2020

Ved hvilke kombinasjoner av signifikant bølgehøyde og -periode skal en etter operasjonsmanualen gå . . .

Karina Helle / Morten Laget


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Wellesley
1189 – Wellesley

Borgland Dolphin Marine
PSA Q&A
Planning 6204/11-3
Schweinsteiger
N/A 15/06/2020

Er det stedsspesifikke målinger av bølger som gjør at en vet når en skal
endre dypgangen?

Karina Helle / Morten Laget


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Wellesley
1190 – Wellesley

Borgland Dolphin Marine
PSA Q&A
Planning 6204/11-3
Schweinsteiger
N/A 15/06/2020

Vi ber om en bekreftelse på at dere for operasjonsdypgangen har
beregnet forankringen for de . . .

Karina Helle / Morten Laget


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Wellesley
1191 – Wellesley

Borgland Dolphin Marine
PSA Q&A
Planning 6204/11-3
Schweinsteiger
N/A 15/06/2020

Hva er gjort for å hindre dannelse av martensitt i overflaten av R5-
kjetting ved sleping av linene . . .

Karina Helle / Morten Laget


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Wellesley
1193 – Wellesley

Borgland Dolphin Marine
PSA Q&A
Planning 6204/11-3
Schweinsteiger
N/A 15/06/2020

Er det utført modellforsøk som er relevant for den aktuelle
forankringen, dypgangen og vanndypet, . . .

Karina Helle / Morten Laget


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Wellesley
1194 – Wellesley

Borgland Dolphin Marine
PSA Q&A
Planning 6204/11-3
Schweinsteiger
N/A 15/06/2020

Vi ber om en bekreftelse på at viskøse bølgedriftskrefter er tatt med i
analysene.

Karina Helle / Morten Laget


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Wellesley
1195 – Wellesley

Borgland Dolphin Marine
PSA Q&A
Planning 6204/11-3
Schweinsteiger
N/A 15/06/2020

I søknaden side 23 skriver dere “The rig anchors have a minimum holding capacity of 8500 kN in . . .

Karina Helle / Morten Laget


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Wellesley
1196 – Wellesley

Borgland Dolphin HSEQ
PSA Q&A
Planning 6204/11-3
Schweinsteiger
N/A 15/06/2020

Vi ber om tilbakemelding på sammensetning og organisering av lokalt AMU offshore (FS-AMU) på . . .

Karina Helle / Morten Laget


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Wellesley
1197 – Wellesley

Borgland Dolphin HSEQ
PSA Q&A
Planning 6204/11-3
Schweinsteiger
N/A 15/06/2020

I tilbakemeldingen fremkommer det hvem som vil representere arbeidstakerne fra 3. part selskap i . . .

Karina Helle / Morten Laget


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Wellesley
1199 – Wellesley

Borgland Dolphin Marine
PSA Q&A
Planning 6204/11-3
Schweinsteiger
N/A 15/06/2020

Hvem har verifisert ankringsanalysene?

Karina Helle / Morten Laget


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