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Well cementing head

A technology of cementing cement and body pipe, which is applied in wellbore/well components, earth-moving drilling, sealing/packing, etc., can solve the problems of potential safety hazards, inability to judge the downward movement of rubber plugs, and difficulty in opening stopper pins. Simple structure, avoid cementing accident, low cost effect

Active Publication Date: 2012-03-14
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a well cementing head, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problem of opening of the retaining pin in the existing cementing head Difficult, unable to judge the downward direction of the rubber plug, and potential safety hazards

Method used

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  • Well cementing head
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Embodiment Construction

[0019] The present invention is not limited by the following examples, and specific implementation methods can be determined according to the technical solutions of the present invention and actual conditions.

[0020] In the present invention, for the convenience of description, the description of the relative positional relationship of each component is described according to the layout of the drawings in the specification, such as: the positional relationship of front, rear, upper, lower, left, right, etc. is It is determined according to the layout direction of the attached drawings.

[0021] Below in conjunction with embodiment and accompanying drawing, the present invention will be further described:

[0022] as attached figure 1 , 2 , 3, the cementing head includes body pipe 1, upper joint 2, lower joint 3, packing rubber plug 4, left stop pin cover 5, right stop pin cover 6, stop pin device and rubber plug indication device; the upper part of the body tube...

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Abstract

The invention relates to the technical field of petroleum gas well cementation and completion tools, and discloses a well cementing head, which comprises a body tube, an upper joint, a lower joint, a packing rubber plug, a left stop pin shell, a right stop pin shell, stop pin devices and a rubber plug indicating device, wherein both sides of the middle part of the body tube are provided with a left tube hole and a right tube hole respectively; the left stop pin shell and the right stop pin shell are fixedly arranged on the body tube on the outer sides of the left tube hole and the right tube hole respectively; and the stop pin devices which can be opened for moving the packing rubber plug downwards are arranged in the left stop pin shell and the right stop pin shell respectively. The well cementing head has a reasonable and compact structure, and is convenient to use; the left and right stop pin devices can be conveniently and reliably opened through a left rotating rod and a right rotating rod, the descending of the packing rubber plug can be reliably judged through the rubber plug indicating device, and well cementation accidents are effectively avoided; and the well cementing head has the characteristics of simple structure, safety, reliability, low cost, convenience for maintaining and reusability.

Description

technical field [0001] The invention relates to the technical field of oil and gas well cementing and completion tools, and relates to a well cementing cement head. Background technique [0002] At present, cement heads are commonly used in oilfields at home and abroad to achieve cementing. If the stop pin cannot be opened and the rubber plug is not pressed down during the oilfield cementing operation, it will cause the cementing to fail to proceed smoothly or the cement plug will remain in the casing accident, especially when the oil layer is completed. During well cementing operations, once a cement plug accident occurs in the casing, the oil well will not be put into production normally, and the later workover will be expensive. Existing cement heads are generally of the straight-rod retaining pin type, and the down indicator of the rubber plug has been used in the straight-rod retaining pin cement head, but due to complex structure, high price or poor use effect, it cann...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/13
Inventor 郑永生彭为孙栓科巴春寿柳文杨林建增张志成
Owner BC P INC CHINA NAT PETROLEUM CORP