Drilling Safety Joint

Drilling Safety Joint provides safe and easy release make-up as require. This tool is designed to transmit torque in either direction when placed in the drilling, fishing or wash over strings. The safety joint consists of a pin section, a box section, and a friction ring. The internal connection of the safety joint is a coarse acme thread used to facilitate easy pack-off and re-engagement. A knurled release ring between the box and pin sections maintain torsion integrity until back-off procedure is initiated. An O-ring seal contains pressure while the safety joint is made up.  

Assembly and Operation: 

To assemble, install the safety joint in the drill string as indicated below. Make up the service connection to a torque of approximately 60 to 75% of the drill string connections. 

• In drill strings, the safety joint should be located above the drill collars to avoid compression.  

• In fishing strings, the safety joint should be located directly above the fishing tool but below the jar or bumper sub. 

• In wash over strings, the safety joint should be located between the drill pipe and the wash over pipe. Wellcare Wash over Safety Joints is provided with a tool joint box thread and a wash over pipe pin thread. 

To disengage the safety joint while down-hole, place pipe in tension and apply left-hand torque. Hold torque while slowly lowering pipe until safety joint breaks. Continue to unscrew safety joint to the left. To re-engage the safety joint, lower pipe until pin section of safety joint lands on box section. Apply one point of weight. Rotate to the left one or two turns. Then rotate to the right until torque builds up, indicating safety joint is made up.