positioning hanger

Abstract

The invention discloses a positioning hanger which comprises a positioning tieback system, a hydraulic reversing double-release assembly, a packer anchoring assembly and a double-hydraulic cylinder system, wherein the positioning tieback system comprises an upper joint, a positioning sleeve, a sealed tieback cylinder, a sliding torque transmission sleeve and a torque transmission key, the upper joint is in threaded connection with the sliding torque transmission sleeve, the sliding torque transmission sleeve is fixedly connected with the torque transmission key, the positioning sleeve is sheathed outside the upper joint, the arc-shaped curved surface is formed on the lower wall surface of the positioning sleeve, a pointed part is formed at the lower end, the sealed tieback cylinder is connected with the positioning sleeve and sheathed outside the upper joint and the sliding torque transmission sleeve, the upper-end shape of the sealed tieback cylinder adapts to the lower-part shape of the positioning sleeve, the lowest part at an opening at the upper end of the sealed tieback cylinder extends downwards for forming a long slot, a key slot is formed on the upper joint, a positioning key is mounted in the key slot, the position of the long slot corresponds to the key slot, and the pointed part at the lower end of the positioning sleeve is aligned with the midline of the key slot. The hanger can provide accurate orientation and positioning for other well completion tools, a setting mechanism of the hanger is safe and reliable, and smooth release can be realized under different working conditions.

Description

technical field [0001] The invention relates to the fields of well drilling and well completion, in particular to a positioning hanger. Background technique [0002] At present, the existing hanger only plays the role of suspending the liner, and cannot provide accurate orientation and tie-back functions for other supporting completion tools. Whenever the operation requires accurate orientation of the tie-back tool, it must be The tie-back string is connected to the directional joint to measure the azimuth, which will increase the difficulty and risk of construction work. In addition, the existing hangers have a single function and generally only have a hanging function. In addition, the anchoring ability and sealing performance are poor, and the application range is limited. Contents of the invention [0003] It is an object of the present invention to provide a positioning hanger with a positioning tie-back system and a dual hydraulic cylinder system. [0004] Another ...

AI Technical Summary

Problems solved by technology

[0002] At present, the existing hanger only plays the role of suspending the liner, and cannot provide accurate orientation and tie-back functions for other supporting completion tools. Whenever the operation requires accurate orientation of the tie-back tool, it must be Connect the directional joint to measure the azimuth on the tie-back string, which will increase the difficulty and risk of construction work

In addition, the existing hangers have a single function, generally only have the hanging function, and the anchoring ability and sealing performance are poor, and the application range is limited

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