World recognized leader in the tubular accessory market

Crossover Safety Joints

The Crossover Safety Joint is built tough to provide safe and easy release and make-up whenever disengagement becomes necessary. This tool was designed to transmit torque in either direction when placed in the drill, fishing and washover string.

  1. In Drill Strings, the Crossover Safety Joint should be located above the drill collars to avoid compression
  2. In Fishing Strings, the Crossover Safety Joint should be located just above the fishing tool, but below jar or bumper.
  3. In Washover Strings, the Crossover Safety Joint should be located between the drill pipe and washover pipe. Crossover washover safety joints are provided with a tool joint box thread and a washover pin thread.

Operational Components

The Crossover Safety Joint consists of a pin section, box section, and a friction ring. The internal connection of the safety joint is a coarse acme thread to facilitate easy backoff and reengagement. A knurled ring between the box and pin section maintains torsional integrity until backoff procedure is initiated. An O-ring seal contains pressure while the safety joint is made up.


To disengage to Crossover Safety Joint, place pipe in tension and apply left-hand torque. Hold torque while slowly lowering pipe until safety joints break. Continue to unscrew safety joint to the left.

To reengage the Crossover Safety Joint, lower pipe until top section of safety joint lands on box section. Apply one point of weight. Rotate left one or two turns. Then, rotate to the right until torque builds up indicating safety joint is made up.

safety joint diagram
Connection Size 2 ⅜" 2 ⅞"
Connection Type API IF API IF
OD of Joint 4 ½" 4 ½"
ID of Joint 2 ⅞" 2 ⅞"
Complete Assembly Number DSJ-20 DSJ-21
Replacement Parts
Pin Section No. DSJ-20P DSJ-21P
Box Section No. DSJ-20B DSJ-21B
Friction Ring No. DSJ-20F DSJ-21F
O-Ring No. DSJ-20R DSJ-21R