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Trajectory slideway-type pressure relief switch

A slideway and trajectory technology, which is applied in the direction of wellbore/well components, earthwork drilling and production, sealing/isolation, etc., can solve the problems of construction failure and easy upward string movement of tubing, and achieve unique trajectory design and avoid radial The effect of exposed vias

Inactive Publication Date: 2015-02-18
张晓义
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Oil well casing deformation (hereinafter referred to as casing deformation) is a practical problem often encountered in oil wells. , it is necessary to drain the high-pressure hydraulic medium in the casing shaping equipment and in the tubing. The pressure relief switch is a key part of the casing shaping and shaping equipment. During the workover process, the equipment below the pressure relief switch is opposite to the oil well casing. Fixed, the upper part of the pressure relief switch is connected with the tubing string. When the tubing string has high-pressure liquid inside, the high-pressure liquid has a relatively large upward thrust on the tubing string. When the oil well is shallow, the weight of the tubing is lighter, so that The oil pipe is easy to move upwards, causing construction failure

Method used

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  • Trajectory slideway-type pressure relief switch
  • Trajectory slideway-type pressure relief switch
  • Trajectory slideway-type pressure relief switch

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Embodiment Construction

[0027] As shown in the figure, the track slideway pressure relief switch includes an outer sleeve 2 and a track core tube 3 arranged in the outer sleeve 2. The number of the outer sleeves 2 is two, and a slide is used between the two outer sleeves 2 The column collar 4 is connected and fixed, the upper end of the upper outer casing 2 is threaded with the upper joint 1, the lower end of the lower outer casing 2 is threaded with the lower collar 6, and the track core pipe 3 is composed of the upper thick-diameter cylindrical section 13 and the lower Small-diameter cylindrical section 14 is composed of an axial through hole 11 in the middle, and a plurality of radial through-holes 12 communicating with the axial through-hole 11 are provided on the lower thin-diameter cylindrical section 14. The lower end of the section 14 protrudes to the outside of the lower collar 6 and an annular seal 5 is arranged between the inner ring groove of the lower collar 6 and the lower thin-diameter ...

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Abstract

The invention relates to a trajectory slideway-type pressure relief switch, which comprises two outer sleeves and a trajectory core tube arranged in the outer sleeves; the two outer sleeves are fixedly connected by a slideway column coupling; the trajectory core tube consists of an upper large-diameter cylindrical section and a lower small-diameter cylindrical section; radial through holes communicated with an axial through hole of the trajectory core tube are formed in the lower small-diameter cylindrical section; trajectory grooves are formed in the upper large-diameter cylindrical section by corresponding to inwards convex sliding blocks on the inner wall of the slideway column coupling; the upper groove of each trajectory groove consists of two groups of grooves evenly distributed; each group of grooves is provided with a long straight groove and a short straight groove, and the adjacent long straight grooves and short straight grooves are in connection and transition respectively by oblique planes I identical in direction; the lower groove of each trajectory groove consists of four lower straight grooves evenly distributed, and the adjacent lower straight grooves are in connection and transition respectively by oblique planes II identical in direction; the oblique planes I and the oblique planes II are staggered in position and opposite in direction of dip. According to the trajectory slideway-type pressure relief switch, a tubing string in a plastic repair casing deformation well process is prevented from shifting upwards, so that the construction process can be performed smoothly, and the performance is reliable.

Description

Technical field [0001] The present invention belongs to the high -pressure liquid leakage switch in the oil well, especially for the key equipment for the deformation of the oil well shrinkage diameter, that is, the trajectory slider -type pressure switch. technical background [0002] The deformation of the oil well sleeve (hereinafter referred to as the suit) is a practical problem often encountered by oil wells. At present, in the construction process of a new hydraulic plastic surgery repair cover, the high -pressure hydraulic medium in the oil pipe in the oil pipe needsDispeling, the leakage switch is a key part of the set to form a kit equipment. During the repair process, the equipment below the pressure switch is relatively fixed with the oil well sleeve.When there is a high -pressure liquid inside, the high -pressure liquid has a relatively large upward thrust on the oil pipe column. When the oil well is lighter, the weight of the oil pipe is lighter, making the oil pipe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B34/12E21B29/10
CPCE21B29/10E21B34/12
Inventor 张晓义
Owner 张晓义
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