A scraper controllable multifunctional wall scraper

A wall scraper and multi-functional technology, which is applied in the direction of cleaning equipment, wellbore/well components, earthwork drilling and production, etc., can solve problems such as impassability, downhole accidents, and failure to raise, and achieve the effect of eliminating hidden safety hazards in the well

Active Publication Date: 2017-12-26
BAOJI AOTONG PETROLEUM MACHINERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the scraper of the conventional wall scraper is always in the open state, if the tool encounters a large cement block or a small hole caused by deformation of the well wall, it will not be able to pass through or cannot be raised, causing downhole accidents

Method used

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  • A scraper controllable multifunctional wall scraper
  • A scraper controllable multifunctional wall scraper
  • A scraper controllable multifunctional wall scraper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] combined with Figure 1-7 An embodiment of the present invention is described.

[0022] A liquid multifunctional wall scraper with a retractable scraper, comprising an upper joint 1 and a lower joint 21 with a through hole in the center, the lower end of the upper joint 1 is connected with a first tubular scraper seat 2, and the first tubular The lower end of the scraper seat 2 is connected with a second tubular scraper seat 22 through an intermediate sleeve 9, and the lower end of the second tubular scraper seat 22 is connected with a ball socket 12 through a ball joint 10, and the ball socket The lower end of 12 is connected with lower joint 21;

[0023] The lower end of the upper joint 1, the two ends of the intermediate sleeve 9 and the upper end of the ball joint 10 all have an annular groove 13, and the first spring 3 is installed in the axial direction of the annular groove 13; Three strip-shaped grooves 14 are evenly distributed along the circumferential direc...

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PUM

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Abstract

The invention discloses a scraper-controllable multifunctional wall scraping device. The lower end of an upper joint is connected with a first tubular scraper seat, the lower end of the first tubular scraper seat is connected with a second tubular scraper seat through a middle sleeve, the lower end of the second tubular scraper seat is connected with a ball receiving sleeve through a ball seat joint, the lower end of the ball receiving sleeve is connected with a lower joint, a scraper is embedded on the excircle of each of the first tubular scraper seat and the second tubular scraper seat, a sliding sleeve and a piston symmetrically mounted at two ends of each of the first tubular scraper seat and the second tubular scraper seat in a sleeving manner, and the lower end of the ball seat joint is connected with a first ball seat through a first ball seat pin and connected with a second ball seat through a second ball seat pin. Pressure in a pipe column is changed by ball casting to control popping and retrieving of the scrapers, so that jamming in a well is avoided and the objective of integration of well drifting, wall scraping and well washing can be achieved through one pipe column.

Description

technical field [0001] The invention relates to the technical field of petroleum workover and downhole operation, in particular to a multifunctional wall scraper with controllable scraper. technical background [0002] The wall scraper is mainly used to clean the cement block, cement sheath, hard wax, various salt crystal nucleus deposits, perforation burrs and oxides produced after casing corrosion on the inner wall of the oil well casing, so that various Downhole tools can be run in unimpeded. Generally, the working nature of the wall scraper determines that its scraper is always larger than the outer diameter of the tool itself, and smaller than the inner diameter of the casing, and the purpose of cleaning is achieved through the up and down movement of the drilling tool. Because the conventional wall scraper is always in the open state, if the tool encounters a large cement block or a small hole caused by deformation of the well wall, it will not be able to pass through...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B37/04
CPCE21B37/04
Inventor 刘君才高耀峰周林
Owner BAOJI AOTONG PETROLEUM MACHINERY CO LTD
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