Tungsten carbide gripper jaws are tools used to clamp and hang the casing string during the drilling process. They are used to clamp or place between the casing of the drill pipe. They are used to tighten and hang the casing string and oil string in the well to prevent them from falling into the well.
Classification
According to the number of slips, it is divided into three-piece, four-piece and multi-piece slips; according to the clamping objects, it is divided into drill pipe slips, drill collar slips, casing slips, tubing slips, and basket slips. , Spiral slips, etc.
Basket Slip
The basket-shaped slip is cylindrical and shaped like a flower basket. The outside of the slip is a complete wide serrated left-handed thread, which matches the internal thread of the outer cylinder. The pitch is the same, but the tooth surface is much narrower and can move up and down in the cylinder. A certain distance. The internal grabbing teeth are also multi-head left-handed serrated threads, and the slips are provided with key grooves at the lower end, which cooperate with the convex keys on the control ring to prevent the slips from rotating in the cylinder. Slips are longitudinally provided with equal expansion and contraction grooves, which can expand or shrink the inner diameter of the slips. Its seal is on the control ring.
Spiral slip
The spiral slip is shaped like a spring, with a wide serrated left-handed thread on the outside that fits with the internal thread of the cylinder. The pitch is equal, but the thread surface is much narrower and can move up and down a certain distance. There are grabbing teeth inside the spiral slip, which is a multi-head left-handed serrated screw. Finger keys are welded to the lower part of the slips to cooperate with the control card to prevent the slips from rotating in the cylinder. Its seal is an "A" shaped sealing ring, placed on top of the spiral slip.
