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

1997-01-17

1998-08-11

Neuder, William P.

Wells

Above ground apparatus

Moving tubing or cable into an existing well

166 774, 166 7753, E21B 720

Patent

active

057914109

ABSTRACT:
An apparatus for optionally gripping and releasing a tube, said apparatus having an elevator with a set of slips for optionally gripping and releasing a tube and a spider with a set of slips for optionally gripping and releasing the other end of said tube, said elevator and spider slips 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 only when the other set of slips is gripping said tube, wherein said apparatus has improved response time, said spider may be hydraulically or pneumatically actuated and said elevator maybe pneumatically operated, and wherein said spider may be flush mounted; and methods.

REFERENCES:
patent: 4676312 (1987-06-01), Mosing et al.
patent: 4813493 (1989-03-01), Shaw et al.
patent: 5311937 (1994-05-01), Masaki et al.

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