A ball-throwing and unsealing hydraulic oil pipe anchor

Abstract

The invention provides a ball injecting de-blocking hydraulic tubing anchor which comprises a lower connector, a central tube and an upper connector arranged on the central tube in a sleeved mode. The ball injecting de-blocking hydraulic tubing anchor is characterized in that the outer wall of the central tube is connected with a piston through a second shear pin, a piston cylinder sleeve is arranged on the outer wall of the piston in a sleeved mode, the inner wall of the piston cylinder sleeve and the outer wall of the piston form a piston cylinder, a locking ring is arranged at the lower end of the piston cylinder and connected with the piston cylinder sleeve in a threaded mode, the lower end of the locking ring is connected with a locking ring back band, the lower end of the piston is provided with a two-way slip connected with the central tube through an elastic part, the two ends of the inner side of the two-way slip are oblique planes, an upper cone and a lower cone are wedged into the two oblique planes respectively, the lower end of the central tube is connected with a pawl sleeve, the lower end of the pawl sleeve is provided with an elastic pawl, a de-blocking ball base is connected with the inner wall of the elastic pawl through a fourth shear pin, and the lower connector is arranged on the outer wall of the de-blocking ball base in a sleeved mode. The ball injecting de-blocking hydraulic tubing anchor has the advantages of being high in safety factor, convenient to use and suitable for various operating environments.

Description

technical field [0001] The invention relates to oil drilling equipment, in particular to a ball-throwing and unsealing hydraulic oil pipe anchor. Background technique [0002] The tubing anchors in the prior art are mainly divided into mechanical rotary setting and rotary unsealing type tubing anchors, and ball-pitching hydraulic setting mechanical lifting and unsealing type tubing anchors. However, the mechanical rotary setting rotary unsealing tubing anchor cannot effectively transmit torque in horizontal wells or highly deviated wells and cannot be used. Although the ball-pitching hydraulic setting mechanical lifting unsealing tubing anchor can be pitched and set in horizontal wells or highly deviated wells However, when lifting and unsealing in deep or ultra-deep wells, the lifting load will be too large, even exceeding the maximum lifting load of the workover rig, so it also has great limitations and great operational risks. Contents of the invention [0003] The obj...

AI Technical Summary

Problems solved by technology

However, the mechanical rotary setting rotary unsealing tubing anchor cannot effectively transmit torque in horizontal wells or highly deviated wells and cannot be used. Although the ball-pitching hydraulic setting mechanical lifting unsealing tubing anchor can be pitched and set in horizontal wells or highly deviated wells However, when lifting and unsealing in deep or ultra-deep wells, the lifting load will be too large, even exceeding the maximum lifting load of the workover rig, so it also has great limitations and great operational risks

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