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Rubber plug and bump pressure tool comprising same and used for oil pipe well cementation

A technology for rubber plugs and tubing, applied in the field of oil and gas well cementing, can solve problems such as affecting the opening of sliding sleeves and backflow of cement slurry, and achieve the effects of avoiding backflow, improving cementing quality, and ensuring wellbore quality.

Pending Publication Date: 2021-12-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the operation, the cement slurry often flows back after the rubber plug is replaced, which affects the opening of the sliding sleeve.

Method used

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  • Rubber plug and bump pressure tool comprising same and used for oil pipe well cementation
  • Rubber plug and bump pressure tool comprising same and used for oil pipe well cementation
  • Rubber plug and bump pressure tool comprising same and used for oil pipe well cementation

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with accompanying drawing.

[0030] figure 1 A rubber stopper 100 according to the invention is shown. Such as figure 1 As shown, the rubber plug 100 includes a rubber plug core 1 , a cup 2 and a first locking member 3 . Wherein, the rubber plug core 1 is in the shape of a rod, which can play the role of skeleton and support. And, from bottom to top, the rubber plug core 1 has an insertion head 11 , a main body 12 and a connection tail 13 fixedly connected in sequence. An annular installation groove 14 is provided on the outer wall of the insertion head 11 . The leather cup 2 is sleeved on the outer wall of the connecting tail 13, and is used to scrape off the cement slurry by contacting the inner wall of the oil pipe 200 during the displacement process. The first locking member 3 is disposed in the installation groove 14 . After the cementing cement grouting is completed, the above-mentioned rub...

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Abstract

The invention provides a rubber plug and a bump pressure tool comprising same and used for oil pipe well cementation. The rubber plug comprises a rubber plug core, the rubber plug core is provided with an inserting head, a main body and a connecting tail which are fixedly connected in sequence from bottom to top, and an annular mounting groove is formed in the outer wall of the inserting head; a leather cup sleeves the outer wall of the connecting tail; a first locking piece is arranged at the position of the mounting groove and used for limiting the position of the rubber plug, after the rubber plug moves downwards in place, the first locking piece on the rubber plug can be matched with a second locking piece arranged on a working barrel of an oil pipe in advance, so that the position of the rubber plug is locked, the purpose of effectively avoiding backflow of cement paste is achieved, and the oil pipe well cementation quality is improved.

Description

technical field [0001] The invention belongs to the technical field of oil and gas well cementing, and in particular relates to a rubber plug and a bumper tool for oil pipe cementing containing the same. Background technique [0002] As the field of oil and gas exploration continues to develop towards unconventional gas (tight gas, shale gas, coalbed methane), the objects faced are becoming more and more complex, and the construction period is getting longer and longer. [0003] After conventional well construction and drilling, it is necessary to run the casing in the oil layer for cementing operations, and then run the tubing for perforation, stimulation, gas production and other operations. This well construction method has a long period and high cost. The integrated well construction technology can effectively overcome the above problems, greatly reduce the cost of well construction, and improve the benefits of oil and gas field development. [0004] In integrated well...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/134E21B23/01
CPCE21B33/134E21B23/01
Inventor 严焱诚侯治民房舟崔警宇郭治良李腾飞谭玮李粒张磊
Owner CHINA PETROLEUM & CHEM CORP