Drill Collar Handling Sub (Patent No: 654099)

Inventor: Oakes, William E.

Location: Edmonton

Comments: N/A

Description:
The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:

1. A drill collar handling sub comprising a rigid metal stem having a cap at one end and an externally threaded portion at the other end thereof~ said stem having an axial bore extending therethrough, a wire line extending axially through said bore, and means for pre-stressing said wire line and for maintaining said wire line under tension comprising a socket member seated on said stem at each end thereof, said wire line having each of its ends embedded in and fixed to one of said socket members, one of said socket members having a shoulder seated on the end of said stem adjacent said cap, and a handling eye fixed to said shoulder, the other of said socket members being of substantially cylindrical externally threaded form, said bore having a tapered section lying within said threaded end portion of said stem~ said tapered section being of gradually decreasing diameter from the adjacent end of said stem, and an expansible locknut having threaded engagement with said threaded socket member and also having a tapered outer surface complementary to and in engagement with said tapered section.