Isolation Valve Installation Readiness Trevor Smith/Mark Nichols 11 May 2010 MC 252 Incident Response.

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Presentation transcript:

Isolation Valve Installation Readiness Trevor Smith/Mark Nichols 11 May 2010 MC 252 Incident Response

2 Problem Statement Capping of the well with the dual ram or isolation valve assembly will require: stabbing into a flange opening which may be obstructed by debris and flowing oil and gas aligning and bolting up a flange connection which is designed for make-up on the drill floor and performing this for the first time at 5000ft water depth, suspended from a drill rig Proposal: perform onshore and/or onshore trials to maximize probability of success

MC 252 Site Overview

Top of BOP Stack

Mule Shoe Detail

Readiness Summary

Trial Objectives & Site Suitability Issue to be checked or testedOnshore Test Suitability Subsea Test Suitability Alignment pin & plug make-up risks Risk of seal damage Befit or risk from pins & plug use Mule shoe engagement with pipe debris Flange rotation & bolt release ROV tool access & function/speed ROV crew familiarization & training Rig crew familiarization &training Ability to stab with rig X Ability to keep flange alignment during make-up X Flow effect on seals XX Stabbing under flow XX

Schedule DRAFT

Other Issues Decide if trials are necessary, if so which & when Define Accountabilities Confirm ROV vessel for flange unbolting Confirm ROVs for flange make-up (DD2 or other support vessel)