Cement slurry rotational flow generator mud cake scraping rotational flow type centralizing tool

A swirl generator and cement slurry technology, applied in cleaning appliances, drilling equipment, wellbore/well components, etc., can solve problems such as inability to scrape mud cakes, casing stuck, etc., and achieve time-saving and stable operation. Effect

Inactive Publication Date: 2019-01-04
大庆宏测技术服务有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiency that the existing casing centralizer cannot scrape the mud cake on the well wall or cause the casing to be stuck, the present invention provides a mud cake scraping swirl type centralizing tool for a cement slurry swirl generator. The tool can scrape off the mud cake on the well wall, and at the same time, it can generate rotating water flow to flush the well wall. When encountering hard objects, it can produce elastic deformation to prevent the casing from being stuck

Method used

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  • Cement slurry rotational flow generator mud cake scraping rotational flow type centralizing tool

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Embodiment Construction

[0010] The present invention will be further described below in conjunction with accompanying drawing:

[0011] Depend on figure 1 As shown, a slurry swirl generator mud cake scraping swirl type righting tool includes an outer sleeve 1, and a rubber screw wing seat 2 and a rigid screw wing 4 are fixed on the outer wall of the outer sleeve 1. The rubber helical wing seat 2 is fixed with a rubber helical wing 3 . The rubber helical wing seat 2 and the rigid helical wing 4 are all four, and are fixed on the outer sleeve 1 at intervals, wherein the rigid helical wing 4 is welded on the outer sleeve 1 . The rubber spiral wing seat 2 includes a left base and a right base, the left base and the right base are L-shaped in cross-section, and are symmetrically welded on the outer sleeve 1 to form a slideway. The section of the rubber helical wing 3 is T-shaped, and its bottom edge is placed in the above-mentioned slideway and fixed by screws. The rubber helical wing seat 2 and the ri...

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Abstract

The invention relates to a cement slurry rotational flow generator mud cake scraping rotational flow type centralizing tool. The cement slurry rotational flow generator mud cake scraping rotational flow type centralizing tool mainly solves the problem that an existing casing centralizer cannot scrape mud cakes on a well wall or cause a casing to be stuck. The cement slurry rotational flow generator mud cake scraping rotational flow type centralizing tool is characterized in that rubber spiral wing seats (2) and rigid spiral wings (4) are fixed to the outer wall of an outer sleeve (1), and rubber spiral wings (3) are fixed to the rubber spiral wing seats (2). According to the centralizing tool, the mud cakes on the well wall can be scraped, and meanwhile, rotating water flow is generated toflush the well wall; and when hard objects are encountered, elastic deformation is generated to prevent the casing from being stuck.

Description

technical field [0001] The invention relates to a downhole tool, in particular to a mud cake scraping swirl type righting tool for a cement slurry swirl generator. Background technique [0002] At present, when the casing is running in the oil field, in order to keep the casing string centered and not be stuck by the mud cake and protruding hard objects on the well wall, a casing centralizer needs to be installed at intervals. Most of the current casing centralizers are of leaf spring structure or steel structure, and leaf spring centralizers cannot scrape the mud cake on the well wall, nor can they play the role of swirl flushing; steel centralizers are prone to casing being Major accidents such as sticking of protruding hard objects on the well wall affect the quality of cementing. Contents of the invention [0003] In order to overcome the deficiency that the existing casing centralizer cannot scrape the mud cake on the well wall or cause the casing to be stuck, the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B17/10E21B37/00
CPCE21B17/1078E21B37/00
Inventor 何亮杨雨蒙李梦龙薛峰
Owner 大庆宏测技术服务有限公司
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