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Failed Double Studded Adapter (Choke Manifold Test – 4 th test @ 10,000 psi; equipment failed)

Failed Double Studded Adapter (Choke Manifold Test – 4 th test @ 10,000 psi; equipment failed). Rig Commissioning – Yard (Jan 28, 2010) New double studded adapter (DSA) delivered from pressure testers – ‘ready to go’

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Failed Double Studded Adapter (Choke Manifold Test – 4 th test @ 10,000 psi; equipment failed)

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  1. Failed Double Studded Adapter(Choke Manifold Test – 4th test @ 10,000 psi; equipment failed) Rig Commissioning – Yard (Jan 28, 2010) • New double studded adapter (DSA) delivered from pressure testers – ‘ready to go’ • Made up the equipment and readied for testing ~ failed at +/- 10,000 psi (5 minutes into a 10 minute test) Root Cause – Failure • Studs not made-up to the DSA properly – had < ½” make-up • No equipment verification ~ both ‘long bolting / short bolting’ evident Action – Everyone • Trust-n-verify ~ ensure equipment is inspected & ready to go • Question stud length anomalies (upon make-up) • Establish & maintain buffer zones • Ensure CoW 4 1/16” 10K x 2 1/16” 10K DSA Barely threaded into DSA For more information contact: Don McKelvey 1-307-413-4585

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