Double-nut anti-off sucker rod string in thick oil horizontal well

A sucker rod string and sucker rod technology, applied in drill pipes, drilling equipment, earthwork drilling and other directions, can solve problems such as tripping at the rod-string connection, prevent tripping phenomenon, ensure the reliability of anti-dropping, Easy-to-use effects

Inactive Publication Date: 2010-02-17
中国石油新疆油田分公司采油工艺研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a heavy oil horizontal well double-nut detachment-proof sucker rod string, which overcomes the deficiencies in the prior art and solves the problem of tripping of the sucker rod string at the joint of the rod string

Method used

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  • Double-nut anti-off sucker rod string in thick oil horizontal well
  • Double-nut anti-off sucker rod string in thick oil horizontal well
  • Double-nut anti-off sucker rod string in thick oil horizontal well

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Embodiment Construction

[0017] The present invention is not limited by the following examples, and specific implementation methods can be determined according to the technical solutions of the present invention and actual conditions.

[0018] Below in conjunction with embodiment and accompanying drawing, the present invention will be further described:

[0019] as attached figure 1 As shown, the heavy oil horizontal well double-nut anti-off sucker rod string includes a polished rod 7, a double-nut sucker rod anti-off device 4, a double-nut anti-off sucker rod 6, no less than one set of anti-off devices and two Nut sucker rod adapter 2; polished rod 7, double nut sucker rod preventer 4, double nut preventer sucker rod 6, not less than one set of anti-loose device and double nut sucker rod adapter 2 from top And the bottom is connected together in sequence; each group of anti-loosening devices includes double-nut anti-loosening sucker rod centralizer 3, double-nut sucker rod anti-loosening device 4 an...

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Abstract

The invention relates to an anti-off sucker rod string in a thick oil horizontal well, which is a double-nut anti-off sucker rod string of the thick oil horizontal well. The double-nut anti-off suckerrod string of the thick oil horizontal well comprises a tubing pump plunger, a sucker rod adapter, an anti-off sucker rod centralizer, an anti-off sucker rod anti-off device, an anti-off weighted lever, an anti-off sucker rod, a polished rod, a coupling, lock nuts and an annular groove. The anti-off sucker rod, the anti-off sucker rod anti-off device, the anti-off sucker rod centralizer and a weighted lever adapter are connected with one another in turn through embedded type anti-off structures and are fixed by the lock nuts. When the coupling is screwed up with a lock screw cap, threads arepulled in a screwing section and the nuts are pressed to form a threaded connection pair compressed horizontally; besides, the lock screw cap is designed with the annular groove which plays a role oflocking by means of the generated pretightening force elastic deformation. The structure of the anti-off sucker rod string allows the entire anti-off sucker rod string to have the anti-off function toensure the overall anti-off reliability of the sucker rod string in the horizontal well, and the anti-off sucker rod string has the advantages of reasonable and compact structure, convenient use, safety and reliability.

Description

technical field [0001] The invention relates to a sucker rod string for a heavy oil horizontal well, and is a double-nut detachment prevention sucker rod string for a heavy oil horizontal well. Background technique [0002] Due to the particularity of the wellbore structure in heavy oil horizontal wells, the sucker rod string of the rod pump is subject to greater bending and torsional stress during work, resulting in tripping of the sucker rod string connection. In the past, the sucker rod string was connected by an embedded structure, and there was still the problem of rod string tripping. Contents of the invention [0003] The invention provides a heavy oil horizontal well double-nut detachment prevention sucker rod string, which overcomes the above-mentioned deficiencies in the prior art and solves the problem of tripping of the rod string joints of the sucker rod string. [0004] The technical solution of the present invention is achieved through the following measure...

Claims

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Application Information

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IPC IPC(8): E21B17/00E21B17/02E21B17/10
Inventor 黄晓东张丽萍何先坤袁新生杨玉梅
Owner 中国石油新疆油田分公司采油工艺研究院
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