Gulf Oil and Gas accountACCOUNT

CNSOPB Permits Resumption of Drilling with Conditions

Source: www.gulfoilandgas.com 6/22/2016, Location: North America

The Canada-Nova Scotia Offshore Petroleum Board (CNSOPB) permitted Shell Canada to resume drilling with restrictions at its Cheshire L-97 exploration well.

Drilling was halted on March 5th after an operations incident on the Stena IceMAX drillship. After securing the exploration well with two barriers and successfully disconnecting to ride out heavy weather, the riser was accidentally dropped to the seafloor.

No one was injured and no well fluids or synthetic oil-based drilling fluids were spilled to the environment.

The CNSOPB review confirmed that the crew of the Stena IceMAX appropriately prepared for heavy weather in the days leading up to the incident on March 5th by suspending drilling, installing two barriers to secure the well (a downhole plug and the closing of the Blowout Preventer, BOP), and displacing drilling fluids in the riser to sea water. When vessel motion exceeded the operational limits, the decision was made to disconnect and ride out the weather with the riser attached to the vessel through the tensioner riser system, a standard procedure. To maximize the distance between the bottom of the riser and the BOP so as to protect the integrity of the well, the tensioner system holding the riser was fully retracted.

The key factors in the cause of the incident were the heave of the vessel andthe inability of the riser tensioner system to compensate for the difference in the movement between the riser and the vessel with the tensioner system in a fully retracted position and with the Riser Anti-Recoil System (RARS) inactive.

For the past three months the CNSOPB has thoroughly reviewed the incident and investigation report. It engaged independent, outside, world-class expertise in deep-water drilling to provide additional oversight. Aberdeen Drilling Management (ADM) worked with the CNSOPB in the review of the incident, the work procedures, the investigation report and an assurance plan that CNSOPB required from Shell Canada, to determine whether drilling can be safely resumed, and, if so, under what conditions.

“This has been a rigorous and exhaustive review of the incident,” says CNSOPB CEO Stuart Pinks. “We are satisfied that the cause of the incident has been properly determined and that appropriate corrective actions have been taken so that drilling may resume safely. As an additional safeguard, the CNSOPB has introduced a condition further tightening operating limits under which drilling may occur.”

Until such time as the CNSOPB completes further reviews, Shell Canada is required to lower its well disconnect criteria on the Stena IceMax based on vessel heave of five metres. The previous criteria was eight metres.



Drilling News in Canada >>

Gabon >>  1/22/2020 - Panoro Energy ASA is pleased to announce the successful completion of the DTM-5H well, the second of the phase 2 Tortue development wells on Dussafu p...
United States >>  1/22/2020 - Oil Search is pleased to advise that the two well/two rig exploration drilling programme and road construction to support the Pikka Unit Development ...

Gabon >>  1/21/2020 - Vaalco Energy, Inc. provided an operational update on its 2019/2020 drilling program offshore Gabon. ...
Argentina >>  1/20/2020 - Echo Energy, the Latin American focused upstream oil and gas company, is pleased to announce that the Campo Limite exploration well (CLix-1001) in th...

Azerbaijan >>  1/15/2020 - SOCAR and BP announced that the first exploration well was spudded on the Shafag-Asiman offshore block in the Azerbaijan sector of the Caspian Sea on ...
Norway >>  1/15/2020 - Equinor is the operator for production licence 878. We have now given the company consent to drill pilot hole 30/2-U-1 using the West Hercules semi-su...

Related Categories: Artificial Lift  Cementing, Stimulation  Directional Drilling  Drilling  Drilling Engineering & Equipment Systems  Enhanced Oil Recovery  General  Logging, Perforating, Testing  Offshore Drilling  Reservoir/Completion Consultants  Workover & Well Services  Workover Rigs/Services 

Related Articles: Artificial Lift  Cementing, Stimulation  Directional Drilling  Drilling  Drilling Engineering & Equipment Systems  Enhanced Oil Recovery  General  Logging, Perforating, Testing  Offshore Drilling  Reservoir/Completion Consultants  Workover & Well Services  Workover Rigs/Services 


Canada Oil & Gas 1 >>  2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 |

More News

Related Links

Gulf Oil and Gas
Copyright © 2020 Universal Solutions All rights reserved. - Terms of Service - Privacy Policy.