Designed for Tension & Compression
The TENCOM™ drivable connector prevents crossthreading by providing deep-stab prealignment. The box trap device is designed to be effective in tension or compression, without having to resort to high torque to resist box and pin ovalization.
The four (4) threads per inch, single start, tapered design maximizes wall thickness in box and pin. The thread position is optimized to reduce stress levels. Preload is applied axially to positive load shoulders, with no radial thread interference.
A unique stress relief groove reduces stress at the o-ring area as well as limiting pin swelling under impact conditions. This "low torque” connector remains "low torque.”
For particular applications, a variety of TENCOM™ configurations are available.
Brief Comparison of Single Start & Quarter Turn Large Diameter Threaded Tubular Connectors
Advantage of 1/4 turn connectors:
Less makeup time is required because only a 1/4 or 5/8 turn is needed to make them up. This eliminates the need for power tongs on the rig.
Disadvantages of 1/4 turn connectors:
1) A four (4) start thread is not self-locking, whereas a single start thread is. This means that anti-rotation/back-out precautions are necessary on 1/4 turn connectors in order to prevent premature and unintentional back-out. This can lead to reduced fatigue life endurance, as well as potential connector separation.
2) Setting the various forms of anti-rotation devices (i.e. Hilti Gun) can be time consuming.
Advantages of Single Start Connectors:
1) Eliminates the need for anti-rotation devices because of self-locking feature (the thread form lead angle is less than the friction angle, producing a self -locking taper).
2) Single start connectors are inherently more reliable and fit-for-purpose. This is particularly true for long term applications where cyclic loading will increase the risk of backout of 1/4 turn connectors.
Casing & Handling Tools
