Case Study 1
|Job:||Separation of XMT from Tubing Spool|
|Job Location:||North Sea|
|Time Taken to Complete Removal:||12 hours|
The client’s drill string had inadequate pull to separate a 13 5/8” 10M flange between the bottom of the XMT and the tubing spool.
■ API 6A 13 5/8” 10M ThinJacks, Technicians and ThinJack inflation equipment mobilised.
■ ThinJack technicians selected the best combination and locations of ThinJacks and associated shims to maximise force available and to prevent unwanted tilting of the flange.
■ Initial gap of 4mm increased to 29mm using 16 ThinJacks.
■ Maximum pushing force was 268 tonnes this was generated with 17,000 psi of hydraulics pressure.
■ Once at 29mm friction was sufficiently reduced to allow the drill string to release the flanges with a pull of 70 tonnes.
■ No studs were cut during the XMT removal.
■ ThinJack reduced the likelihood of damage to tubing hanger by keeping flange vertical.