A self-adaptive intelligent retractable wellbore sand scraping tool suitable for complex structure wellbore

A complex structure, self-adaptive technology, applied in wellbore/well parts, cleaning equipment, earthwork drilling and production, etc., can solve the problems of scraper jamming and inability to adapt to the change of casing diameter, so as to protect the casing and save The effect of lifting or lowering time and stretching length can be controlled

Active Publication Date: 2021-10-15
SOUTHWEST PETROLEUM UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention aims to overcome the defects that the existing casing scraper can not adapt the casing diameter to the change of the casing diameter, over-scratch the casing when the straight well is scraped and the curved hole is over, and the scraper is stuck, etc., and provides a controllable telescopic length, An adaptive intelligent telescopic wellbore sand scraping tool with controllable telescopic timing for wellbore with complex structures

Method used

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  • A self-adaptive intelligent retractable wellbore sand scraping tool suitable for complex structure wellbore
  • A self-adaptive intelligent retractable wellbore sand scraping tool suitable for complex structure wellbore
  • A self-adaptive intelligent retractable wellbore sand scraping tool suitable for complex structure wellbore

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Embodiment Construction

[0023] Below in conjunction with accompanying drawing and example the present invention will be further described:

[0024] An adaptive intelligent retractable wellbore sand scraping tool suitable for wellbore with complex structures, mainly composed of an upper joint 1, a spring 4, a wedge body 5, a knife plate 6, a wedge body 2 7, a casing 8, a center column 9, a lower Joint 10, distribution tube 11, rotary valve plate 12, motor 13, sensor 16, blade spring 18; it is characterized in that: the interior of the upper joint 1 is positioned by the shaft shoulder and connected with the end cap 2 and the pipe joint by screws 3. The end cover 2 is welded to the spring seat 17; the lower end of the upper joint 1 is threadedly connected to the upper part of the shell 8; the shell 8 has a positioning window for the installation, positioning and expansion of the knife plate 6; the knife The plate 6 is provided with a blade spring groove and a wedge-shaped body 27 movement channels; the ...

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Abstract

The invention relates to a self-adaptive intelligent telescopic wellbore sand scraping tool suitable for wellbore with complex structures, which mainly consists of a casing, wedge body 1, wedge body 2, knife plate, center column, two kinds of tension springs, lower joint, shunt Composed of cylinder, rotary valve plate, sensing device, etc., it is characterized in that: the knife plate has a spring groove and a wedge-shaped body two movement channels, and is fixed in the shell, and the center column inside the shell is equipped with a wedge-shaped The body is connected with a spring together; the lower joint is connected with the shell, and a shunt cylinder, a rotary valve plate, a base, a motor and a sensor are installed inside. With the help of the controllable telescopic knife plate and the intelligent feedback system, the present invention effectively avoids the practical problem of over-scraping the casing when the well bends, effectively improves the efficiency of the workover, prolongs the service life of the scraper, and reduces the risk and cost of the workover and loss.

Description

technical field [0001] The invention relates to the technical field of oil drilling and production tools, in particular to an adaptive intelligent telescopic wellbore sand scraping tool suitable for complex-structured wellbore. Background technique [0002] In the process of oil extraction, the problem of sand production in oil wells has always been an urgent problem to be solved in the oil extraction industry. Sand production in oil wells will not only reduce the production of oil wells, but also accelerate the wear, corrosion, and aging of ground and underground mining equipment. , causing the oil well to be scrapped. Therefore, sand scraping operation has become an indispensable process in workover and completion operations. [0003] The existing sand scraping technology mainly removes the solid sand particles remaining in the wellbore by lowering the sand scraping tool, and also removes various salt crystals and deposits such as cement block, cement sheath, and hard wax...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B37/04
CPCE21B37/04
Inventor 董亮亮周志浩李坤崔同勤
Owner SOUTHWEST PETROLEUM UNIV
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