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Hydraulic oscillation centering device

A centralizer and hydraulic technology, which is used in wellbore/well components, earthmoving, sealing/packing, etc., can solve the problems of inability to achieve turbulent state of slurry replacement, low displacement efficiency, and poor cementing quality, etc. To achieve the effect of improving replacement efficiency, strengthening compactness and reasonable structure

Active Publication Date: 2014-05-21
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 hydraulic oscillation centralizer, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problem that existing centralizers cannot The turbulent state of slurry replacement, low replacement efficiency and poor cementing quality

Method used

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  • Hydraulic oscillation centering device
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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 based on the description attached to the description. figure 1 For example, the positional relationship of front, rear, top, bottom, left, right, etc. is determined according to the layout direction of the drawings in the description.

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

[0022] as attached figure 1 , 2 , 3, 4, and 5, the hydraulic oscillation centralizer outer cylinder 1, eccentrically rotating inner cylinder and annular gland 2; the inner side of the upper end of the outer cylinder 1 is fixed with an annular end Fluid impacts ...

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Abstract

The invention relates to the technical field of centering devices for well drilling and completion work, and discloses a hydraulic oscillation centering device. The hydraulic oscillation centering device comprises an outer cylinder, an eccentric rotating inner cylinder and an annular gland. An annular end cover is fixed to the inner side of the upper end of the outer cylinder. The eccentric rotating inner cylinder which can rotate in the outer cylinder in an eccentric mode under the impact of fluid is arranged in the outer cylinder in a sleeved mode. The annular gland is fixedly installed at the position, corresponding to the position below the eccentric rotating inner cylinder, inside the lower portion of the outer cylinder. The annular gland and the annular end cover are respectively provided with at least one circulating passageway which is communicated with the inner portion of the outer cylinder in the circumferential direction. The hydraulic oscillation centering device is reasonable and compact in structure; the hydraulic oscillation centering device drives a sleeve to shake, and therefore generated vibration waves can impact on sleeve columns and wash away mud cakes on the well wall; viscosity of displacing liquid is reduced, and therefore the displacing liquid can easily flow, displacing efficiency is improved, and meanwhile cementing of cement sheathes and the well wall and cementing of the sleeve columns and the well wall are facilitated, the density degree of set cement is increased, and therefore well fixing quality is effectively improved; the hydraulic oscillation centering device can be applied to any well condition and any stratum and has a good effect on low-pressure stratums which are prone to leakage.

Description

technical field [0001] The invention relates to the technical field of centralizers for drilling and completion operations, and relates to a hydraulic vibration centralizer. Background technique [0002] In the actual drilling and completion operations, cementing is the finishing project of a well, and its quality is related to the quality of the whole well and whether the well can be handed over. Therefore, improving the quality of cementing has become an important task for all companies engaged in cementing and completion technology. Important goals that are constantly being pursued. Casing centering and displacement efficiency of cement slurry are the key factors affecting the cementing quality; currently, in order to ensure the above two conditions, elastic or rigid centralizers are usually used to ensure the centralization, and the displacement rate and flow rate are increased to ensure the cementing quality. The cement slurry creates turbulent flow to increase displac...

Claims

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Application Information

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IPC IPC(8): E21B33/13
Inventor 郭新超张新文杨树林王文涛王浩颜斌
Owner BC P INC CHINA NAT PETROLEUM CORP
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