Well string retrieving apparatus

Details Well string retrieving apparatus Well string retrieving apparatus

E - Fixed Constructions

21

B

255/14.4

E21B 19/02 (2006.01) B66D 1/82 (2006.01) E21B 19/00 (2006.01) E21B 19/14 (2006.01)

Patent

CA 1125736

ABSTRACT OF THE DISCLOSURE An apparatus for retrieving elements of a drill string, i.e., sections of drill pipe or collars in a derrick includes a winch unit and pulleys mounted at substantially the same height as the derrick work plat- form. A cable extending outwardly from the winch unit passes around the pulleys and is secured to the derrick frame, so that the cable surrounds the inner periphery of the derrick, except for the work platform side thereof. The pulleys are connected to retract units. When the winch is actuated, the pulleys move with the cable towards the work platform side of the derrick to retrieve any element which has fallen away from the work platform.

375103

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