Hydraulic casing centralizer with double hydraulic cylinders

A technology of centralizer and hydraulic cylinder, which is applied to casing, drill pipe, drilling equipment and other directions, can solve problems such as poor centering effect, and achieve the effect of improving centering effect, avoiding puncture and scraping, and being convenient to use.

Active Publication Date: 2015-01-14
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0003] The present invention provides a double-hydraulic cylinder hydraulic casing centralizer, which overcomes the above-mentioned deficiencie

Method used

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  • Hydraulic casing centralizer with double hydraulic cylinders
  • Hydraulic casing centralizer with double hydraulic cylinders

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Embodiment Construction

[0017] 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.

[0018] In the present invention, for the convenience of description, the description of the relative positional relationship of each component is based on the description attached to the description. figure 1 For example, the positional relationship of front, back, up, down, left, right, etc. is based on the attached figure 1 determined by the layout direction.

[0019] Below in conjunction with embodiment and accompanying drawing, the present invention will be further described:

[0020] as attached Figures 1 to 3 As shown, the double-cylinder hydraulic casing centralizer includes a casing nipple 1, an upper liquid cylinder 2, a lower liquid cylinder 3, an upper backstop bushing 4, a lower backstop bushing 5, and a first limit device , the second limit ...

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Abstract

The invention relates to the technical field of casing centralizing devices and discloses a hydraulic casing centralizer with double hydraulic cylinders. The hydraulic casing centralizer comprises a casing nipple, an upper hydraulic cylinder barrel, a lower hydraulic cylinder barrel, an upper backstop shaft sleeve, a lower backstop shaft sleeve, a first limiting device, a second limiting device, a third limiting device, a fourth limiting device and at least one spring plate, wherein the first limiting device is fixedly arranged at the outer side of the upper part of the casing nipple; the outer side of the upper part of the casing nipple is sleeved by the upper backstop shaft sleeve; and the outer side of the upper part of the upper backstop shaft sleeve is fixed together with the inner side of the lower part of the first limiting device. The hydraulic casing centralizer is reasonable and compact in structure, and convenient to use; both the upper hydraulic cylinder barrel and the lower hydraulic cylinder barrel can push the spring plate to expand, so that the centering effect of a casing connected with the hydraulic casing centralizer in a well can be improved, and the centralizing effect of the hydraulic casing centralizer to the casing is improved; and meanwhile, the formed cement sheath is uniform in thickness, the well cementation quality is improved, and risks existing in later-period production and oil and gas invasion in operation are reduced.

Description

technical field [0001] The invention relates to the technical field of casing centralizers, and relates to a double-hydraulic cylinder hydraulic casing centralizer. Background technique [0002] The quality of horizontal well cementing directly restricts the oil production of oil wells in the later stage. In cementing operations, centralizers, as a cementing tool, play an important role in cementing quality. At present, domestic and foreign cementing operations mostly use rigid Conventional casing centralizers such as centralizers and roller centralizers, when using conventional centralizers to run casing in the horizontal well section for cementing, there are large frictional resistance when the centralizer is run in, the casing is not centered, and the thickness of the cement sheath is high. The problem of unevenness, when the casing is not centered, reduces the centralizing effect of the centralizer on the casing, seriously affects the cementing quality, and increases the...

Claims

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Application Information

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IPC IPC(8): E21B17/10
CPCE21B17/1078
Inventor 宋朝晖李晓军穆总结李富强
Owner BC P INC CHINA NAT PETROLEUM CORP
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