Mechanical unclamping non-rotating casing scraper
A non-rotating, mechanical technology, applied in the direction of casing, drill pipe, cleaning equipment, etc., can solve the problems of easily damaged casing and affect the service life of scraper, and achieve the effect of avoiding damage to casing
Inactive Publication Date: 2021-08-06
中石化石油工程技术服务有限公司 +2
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Problems solved by technology
The scraper of the existing scraper will rotate with the string body, which is easy to damage the casing and affect the service life of the scraper
Method used
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[0023] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.
[0024] Such as Figure 1-2 As shown, the mechanically detachable card non-rotating sleeve scraper of the present invention. It includes a body 1 , an upper lock sleeve 2 , a sleeve 7 , a lower lock sleeve 13 , a left-handed scraper 11 , a right-handed scraper 9 and a lower joint 20 .
[0025] The sleeve 7 is mounted outside the body 1 , and a bearing is provided between the sleeve 7 and the body 1 . The right-handed scraper 9 is fixed on the upper part of the sleeve 7 through the upper locking sleeve 2 and the connecting sleeve 10 , and the left-handed scraper 11 is fixed on the lower part of the sleeve 7 through the lower locking sleeve 13 and the connecting sleeve 10 . The lower end of the main body 1 is fixedly con...
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The invention relates to a mechanical unclamping non-rotating casing scraper. The casing scraper comprises a body, an upper locking sleeve, a sleeve, a lower locking sleeve, a left rotating scraper, a right rotating scraper and a lower connector, wherein the sleeve is installed on the outer side of the body, a bearing is arranged between the sleeve and the body, and the right rotating scraper is fixed to the upper portion of the sleeve through the upper locking sleeve and a connecting sleeve; and the left rotating scraper is fixed to the lower portion of the sleeve through the lower locking sleeve and the connecting sleeve, the lower end of the body is fixedly connected with the lower connector, a shearing sleeve is arranged between the body and the lower locking sleeve, a shearing ring is arranged between the body and the lower connector, the shearing sleeve is connected with the shearing ring through a shearing pin, clamping teeth are arranged at the lower end of the lower locking sleeve, and tooth grooves opposite to the clamping teeth are formed in the upper end of the lower connector. According to the mechanical unclamping non-rotating casing scraper, the scrapers and the body can rotate relatively and freely, in the normal scraping process, the body rotates along with a pipe column, the scraper cannot rotate, damage to a casing is avoided, and all-in-one operation of completing multiple procedures through one pipe can be achieved by combining drifting, plug drilling and cleaning tools.
Description
technical field [0001] The invention relates to the technical field of oil drilling, oil testing and gas testing, and more specifically relates to a mechanical detachable non-rotating casing scraper. Background technique [0002] Casing scraper is used to remove cement block, cement sheath, hardened mud, paraffin, various salt crystals and deposits on the inner wall of oil and gas field wellbore. It can also remove perforation burrs and iron oxides produced after casing corrosion. In order to make the inner wall of the wellbore clean and tidy, unobstructed, the downhole tools can be inserted smoothly, and the success rate of the operation can be improved. The scraper of the existing scraper rotates with the pipe string body, which easily damages the casing and affects the service life of the scraper. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a mechanical detachable non-rotating bushing scraper, which can ...
Claims
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IPC IPC(8): E21B37/02E21B17/10
CPCE21B37/02E21B17/1078
Inventor 苏浩曹宗波郭知龙孙晨祥张永峰唐永祥郭锐锋高攀陈志航李庆楼
Owner 中石化石油工程技术服务有限公司