Charlie W Hartley

US Patent:

41836499, Jan 15, 1980

Filed:

Apr 28, 1978

Appl. No.:

5/901219

Inventors:

Charlie Hartley - Durham OK

International Classification:

B66C 2360

US Classification:

2541391

Abstract:

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 powdered winch for carrying a guide cable, said first winch including apparatus for selectively engaging and disengaging a first winch spool from a first winch shaft. A disc brake 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 for receiving a length of guide rope, said second powered winch including a plurality of friction drive collars. The apparatus is mounted upon a vehicle 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 driving force of the collars thereby pulling the drilling cable onto the storage spool. Methods are disclosed for use of this apparatus in removing and replacing the drilling cable within the oil rig.