Installing Highly Alloyed Corrosion-Resistant Alloy 25 Chrome Tubing withDope-Free Connections in Triple Joint Stands to Reduce Running in HoleTime in an Offshore Field

摘要

This paper describes the novel experience of running Corrosion-Resistant Alloy(CRA)25% chrome tubingwith Dope-free connections in triple joint stands to reduce online running-in-hole(RIH)time.To achievethis,an international operator of a deepwater field development in Angola,defined a special set-up for themake-up and handling equipment,along with connections featuring Dope-free technology.5 V"2 production tubing strings were run in triple joint stands in 2 deep water wells offshore Angola.Well"A"had 14 triples while Well"B"had 67 triples installed.Running highly alloyed CRA tubing withDope-free technology in stands,in conjunction with using the special handling equipment resulted in fasterand safer installations,thus reducing operational risk and saving rig time for the operator.Furthermore,the thread compensator performed the make-up with the neutral point at thread pin thus minimizing stressat the thread's metal seal zone.Several other benefits recorded include savings in jet-wash water,zerodope discharge,reduced personnel exposure to risk,reusability of non-contaminated thread protectors andimproved well productivity.The notion of installing highly alloyed CRA tubular in oil and gas wells initially considered too sensitiveto be run in triples has been shown to be conservative.This paper shows that from field experience,running highly alloyed CRA tubulars with Dope-free connections in triples is achievable with demonstrableoperational improvement and increased reliability.