Oil derrick string-up apparatus and methods

Details Oil derrick string-up apparatus and methods Oil derrick string-up apparatus and methods

B - Operations, Transporting

66

C

255/17, 254/29

B66C 23/60 (2006.01) E21B 19/02 (2006.01)

Patent

CA 1087600

Abstract of the Disclosure An apparatus is provided for removing and replacing heavy steel drilling cable within the derrick structure of an oil drilling rig. The apparatus includes a first powered winch means for carrying a guide cable, said first winch means including means for selectively en- gaging and disengaging a first winch spool from a first winch shaft. Disc brakes means is provided for applying a retarding force to said first winch spool to brake its rotational motion. The apparatus also includes a second powered winch means for receiving a length of guide rope, said second powered winch means including a plurality of friction drive collars. The apparatus is mounted upon a vehicle which provides a means for moving the friction drive collars into engagement with flanges of a drilling cable storage spool so that the spool may be rotated by the drilling force of the collars thereby pulling the drilling cable onto the storage spool. Methods are dis- closed for use of this apparatus in removing and replacing the drilling cable within the oil rig.

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