Many of the outstanding features of our plugs and packers have been incorporated into the Cement Retainers. This is rugged, compact units engineered for fast running downhole on either tubing.
The principle of this product is to use the oil pipe to send the cement retainer to the design depth, the ground ball. After the ball is in place, the cement truck is connected to the ground pipeline and pressed. The thrust produced by the hydraulic pressure acts on the piston. The piston shear pin squeezes down the upper slips. Continue pumping pressure, and the upper slips push down the upper vertebral body to shear the shear nail. Continue pumping pressure, the upper slips continue to compress the rubber cylinder and the lower slips cut off the shear nails and set; Continue pumping pressure, after the ball seat is knocked off, cement can be placed below. After cementing, when the upper lifting string reaches a certain value, the release ring is pulled off, and the upper and lower central pipes can be cemented in the upper part.