Patent ID: 7779922

Claim:
A device for locking a tubular in a drill string for rotation with a quill of a drilling unit comprising: a. a collar having at least one longitudinal first channel for receiving a key within an internal face of said collar, said collar having an upper end and a lower end; b. said collar having at least one socket for receiving the key within an internal face of said collar, said socket being adjacent to said first channel; c. said collar having at least one second channel for receiving the key within an internal face of said collar, said second channel being adjacent to said socket and parallel to said first channel; d. said collar having at least one contact point connected to said lower end of said internal face, said contact point contacting a key stock of said tubular; e. said first channel extending above and below said socket and being unobstructed from said upper end of said collar to said lower end of said collar.