Apparatus and method for improved tubular grip assurance

Details Apparatus and method for improved tubular grip assurance Apparatus and method for improved tubular grip assurance

E - Fixed Constructions

21

B

E21B 19/07 (2006.01) E21B 7/00 (2006.01) E21B 19/10 (2006.01)

Patent

CA 2274650

An apparatus for optionally gripping and releasing a tube (34), said apparatus having an elevator (12) with a set of slips (30) for optionally gripping and releasing a tube (34) and a spider (18) with a set of slips (30) for optionally gripping and releasing the other end of said tube (34), said elevator and spider slips (30) being in communication one to the other by pressurized conduits, said conduits forming a pressure circuit to supply pressure to release one set of slips (30) only when the other set of slips is gripping said tube (34), wherein said apparatus has improved response time, said spider (12) may be hydraulically or pneumatically actuated and said elevator (18) may be pneumatically operated, and wherein said spider (12) may be flush mounted; and methods.

L'invention concerne un dispositif servant, au choix, à serrer ou à libérer un tube (34), comportant un élévateur (12) pourvu d'un ensemble de coins de retenue (30) permettant, au choix, de serrer ou de libérer un tube (34) et un collier (18), pourvu d'un ensemble de coins de retenue (30), servant, au choix, à serrer ou à libérer l'autre extrémité dudit tube (34). Les coins de retenue (30) de l'élévateur et du collier sont en communication les uns avec les autres grâce à des conduits à fluide sous pression, lesdits conduits formant un circuit à fluide sous pression qui fournit de la pression pour libérer un ensemble de coins de retenue (30) seulement lorsque l'autre ensemble de coins de retenue serre ledit tube (34). Le dispositif selon l'invention présente un temps de réaction plus court, ledit collier (12) peut être actionné de façon hydraulique ou pneumatique et ledit élévateur (18) peut être actionné de façon pneumatique, le collier (12) pouvant être encastré. L'invention concerne également des procédés associés.

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