Patent ID: 9708865
Date: 2017-07-18
CPC Classifications: E21B,F16L

Claim:
1. A pipe connection, comprising: a pin having external threads, a nose portion at an end of the pin on a first side of the external threads, an external shoulder on a second side of the external threads, and a longitudinal axis; a box having internal threads that mate with the external threads and a rim at the end of the box that abuts the external shoulder at make-up of the pin and the box; a circumferentially extending row of pin teeth on an exterior portion of the pin, the pin teeth encircling an outer diameter of the pin and located axially between the external threads and the external shoulder; a key on the box, the key being rigid and having at least one key tooth that engages the pin teeth; the key being mounted to the box such that a portion of the key containing the at least one key tooth is radially movable relative to the box so that the at least one key tooth ratchets on the pin teeth during make-up of the pin and the box; and each of the pin teeth having a saw-tooth configuration to resist unscrewing rotation of the pin and the box; wherein the key is a separate member from the box and mounted within a slot formed in a side wall of the box; and the pipe connection further comprises: