Torque rings are steel rings inserted into the couplings of standard API threaded and coupled tubing and casing connections. The ring provides a number of benefits, including a mechanical shoulder for the ends of the pin ends to increase torque capacity.
[pdf] Before starting casing, the drilling supervisor should hold a pre-job safety meeting and confirm the following with the crew: 1. Remove unnecessary tools. 2. Good Housekeeping before the job 3. Rig up Casing handling equipment: Using appropriate hand. .
A circulation sub, fitting the casing thread, equipped with a WECO connection, shall be readily available on the rig floor at all times during casing running.
[pdf] The guide shoe is simply a plain end device run on the bottom of any type of casingwith a cement or composite bottom and a restricted hole through the center. It is rounded on the bottom so it will pass.
[pdf] 
