A drilling tool centralizer

A technology for centralizers and drilling tools, which is applied in the direction of drill pipe, drill pipe, earthwork drilling, etc. It can solve the problems of fast wear of wear-resistant band, long repair period, and high drilling cost, so as to reduce the contact area and trim the size of the well wall , to avoid the effect of drill sticking

Active Publication Date: 2020-10-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The wear-resistant belt of the existing integral centralizer wears quickly, making repair difficult and long repair period. One well needs to consume many centralizers, which results in high drilling costs

Method used

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  • A drilling tool centralizer
  • A drilling tool centralizer

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Embodiment Construction

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereby.

[0023] figure 1 It schematically shows the working state of the drilling tool centralizer 10 in the embodiment of the present invention when drilling. figure 2 It schematically shows the working state of the drilling tool centralizer 10 in the embodiment of the present invention when lifting the drilling tool after being blocked.

[0024] Such as figure 1 with figure 2 As shown, the drilling tool centralizer 10 of the embodiment of the present invention includes a mandrel 1 , a bearing 2 , a bearing bush 3 , a support sleeve 4 and a lower joint 5 . The top of the mandrel 1 is connected with the upper drilling tool, the bottom of the mandrel 1 is connected with the top of the lower joint 5, and the bottom of the lower joint 5 is connected with the lower dril...

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Abstract

The invention provides a drilling tool centralizer which comprises a mandrel, a bearing, a bearing bush, a supporting sleeve and a lower connector. The top end of the mandrel is connected with an upper drilling tool, the bottom end of the mandrel is connected with the top end of the lower connector, the bottom end of the lower connector is connected with a lower drilling tool, the bearing and thebearing bush are arranged on the periphery of the mandrel in a sleeving mode, the supporting sleeve is arranged on the periphery of the bearing bush in a sleeving mode, and a positioning groove used for fixing the bearing bush is formed in the supporting sleeve. Friction resistance inside the drilling tool centralizer can be reduced, quick-wear parts are easy to replace, and therefore the drillingcost can be reduced.

Description

technical field [0001] The invention belongs to the technical field of petroleum industry machinery, and in particular relates to a drilling tool centralizer. Background technique [0002] Drilling tool centralizer is an important tool to prevent well deviation in oil drilling. During the drilling process, the working outer diameter of the centralizer is strictly required. When the working outer diameter is reduced, the drilling tool centralizer loses its function and must be replaced with a new one. centralizer. The wear-resistant band of the existing integral centralizer wears quickly, and it is difficult to repair, and the repair period is long. One well needs to consume many centralizers, which results in high drilling costs. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a drilling tool centralizer that can reduce frictional resistance inside the drilling tool...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B17/10
CPCE21B17/1078
Inventor 胡群爱崔晓杰赵晨熙刘匡晓马兰荣孙连忠赵建军陈军海
Owner CHINA PETROLEUM & CHEM CORP
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