4527 Brittmoore | Houston, Texas 77041 | +1 (281) 324-0558 | [email protected] | www.thesubsea.com © 2012, The Subsea Company Ideas, Innovation and Implementation Signature Tester Typical BOP Test Applications SUBSEA BOP EQUIPMENT OPERATOR RELATED FAILURE FAILURE RESULT IMPORTANCE SIGNATURE TEST Wellhead Connector Cannot or difficult to unlock Lost rig time, possible lost well due to cutting off wellhead High Unlock signature test and back driving test LMRP Connector Cannot or difficult to unlock Lost riser string if can not release during drift off High Unlock signature test and back driving test Locking Mini-Collets Cannot or difficult to unlock Severe damage to subsea BOP Low Unlock signature test and back driving test Annular Type Blow Out Preventers Leak, possible difficulty with annular fully opening subsea Usually repairs are made after well completion. Sometimes the BOP has to be pulled Low Close and open signature test with pressure test; observe annular to make sure it relaxes Ram Blow Out Preventers Cannot or difficult to unlock Can not open the rams resulting in substantial downtime. Potential for well control incident High Lock and unlock full-function signature test Subsea Valves Broken fail-safe spring Loss of fail-safe capability Low Signature test open port will confirm spring function; test will show spring and gate condition
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4527 Brittmoore | Houston, Texas 77041 | +1 (281) 324-0558 | [email protected] | www.thesubsea.com
© 2012, The Subsea CompanyIdeas, Innovation and Implementation
Signature Tester
Typical BOP Test Applications
SUBSEA BOPEQUIPMENT
OPERATORRELATEDFAILURE
FAILURERESULT
IMPORTANCE SIGNATURE TEST
WellheadConnector
Cannot or diffi cult to unlock
Lost rig time,possible lost well due to cutting off wellhead
High Unlock signature test and back driving test
LMRP Connector
Cannot or diffi cult to unlock
Lost riser string if can not release during drift off
High Unlock signature test and back driving test
Locking Mini-Collets
Cannot or diffi cult to unlock
Severe damage to subsea BOP
Low Unlock signature test and back driving test
Annular Type Blow Out Preventers
Leak, possible diffi culty with annular fully opening subsea
Usually repairs are made after well completion. Sometimes the BOP has to be pulled
Low Close and open signature test with pressure test; observe annular to make sure it relaxes
Ram Blow Out Preventers
Cannot or diffi cult to unlock
Can not open the rams resulting in substantial downtime. Potential for well control incident
High Lock and unlock full-function signature test
Subsea Valves Broken fail-safe spring
Loss of fail-safe capability
Low Signature test open port will confi rm spring function; test will show spring and gate condition
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