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British Gas Egypt Incident Investigation – March 2013

British Gas Egypt Incident Investigation – March 2013. MPO Flow diagram Tap Root Investigations BG March 2013 NSD Equipment Pressure Testing following equipment left on the rig. 2 1/16” 10k Valve N4 failed pressure test. Casual Factors Identified, Proposed Recommendations & Verification

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British Gas Egypt Incident Investigation – March 2013

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  1. British Gas Egypt Incident Investigation – March 2013 • MPO Flow diagram Tap Root Investigations BG March 2013 • NSD Equipment Pressure Testing following equipment left on the rig. 2 1/16” 10k Valve N4 failed pressure test. • Casual Factors Identified, Proposed Recommendations & Verification • Needs Improvement • Support Data

  2. TapRoot Investigations – March 2013 Onsite Supervisor informs DSV of problems Review Process Incident Reports etc., Received Client Visit & Review A Presentation of corrective action plan Onsite Supervisor informs MPO Management Consolidate Data / Fact Find • Ops Team & QHSE, commence reviewing reports. Implementation Initiate internal review with crews NI

  3. NSD 2 1/6” 10k Valve failure March 2013 TapRootInvestigation 18:00 hrs to 20:00hrs 8th Mar 2013 18:00 hrs to 20:00hrs 8th Mar 2013 1stMar 2013 09:00 hrs8th Mar 2013 NSD Operators down manned due to stuck pipe incident NSD Supervisor mobilized to the rig. Pressure up control panel and Function all valves Pressure Test against N3 & N4 Low pressure test then High pressure test ? B N4 Valve leaked during High pressure test A CF #1 NI 1 Isolated the entire NSD system from the rig checked all equipment bled off the MCP shut in all valves manually on the NSD Ram Low Pressure Test was at 300psi Equipment had been left in an as is status by the previous crew. All valves functioned correctly from fully closed to fully open. High Pressure Test was at 5000psi Flushed through the RAM with the cement unit then flushed Through hose after closing N3 & N4 Operator was called off to get equipment ready for NSD Pressure Test on N1 & N2 conducted with successful result NI

  4. NSD 2 1/6” 10k Valve failure March 2013 TapRootInvestigation CF #2 09:00 hrs 9th Mar 2013 Valve stripped down by NSD Operator Valve seat was found to be washed out Spares were not available on the rig N4 Valve leaked during pressure test B NI 3 Blade supervisor assisted with the strip down Spares container was in Alexandria 21st Feb-13. Instability led to 20 day delay in clearance Washout was erosional on the upstream side of the valve seat. NI 2 No lifting gantry available for combined lift of actuator and bonnet. whichhad to be manhandled Valve had been used to drain down after 10 connections With 13.4 ppg mud. Clarification Required from Manufacturer T3 Customs Clearance required transportation to Cairo – Thereafter this will be transported to Alexandria Valve seat material is NACE compliant. Alternate Non-H2S options are available. Further advise sought from T3 Valve spares in country will arrive at the rig 16th Mar 13 Additional trim spares ordered and will be airfreighted NI

  5. NSD Casual Factors Identified & Proposed RecommendationsTapRoot Investigation – March 2013

  6. Needs Improvement Factors Identified & Proposed RecommendationsTapRoot Investigation – March 2013

  7. Support Data – Report of Washout findings by M.Honeyman Support Data

  8. Support Data Communication regarding Procedural Compliance Washout in this valve has been seen after only 10 connections, the volume of fluid which is going through this valve is very small under a pressure of 2-3bar of hydrostatic from the top of the Kelly hose. This is a low pressure and low volume application and therefore the washout is unexpected. The material specification for the valve seat was as designed for this type of usage and the design criteria for the valve meets the specification for the fluid which is being flowed through at the pressures measured on the rig. T3 are performing a full investigation into the failure. Spares required for the NSD were planned to be on the rig before the start of operations, however issues with transportation during political unrest has meant that there have been significant delays to the spares reaching the rig site. Crew will properly break down the valves into manageable lifts and properly JSA the operation of replacement of valves.

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