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Reversible sand-washing cleaning tool

A technology for cleaning tools and sand washing, which can be used in the direction of flushing wellbore, wellbore/well components, earth-moving drilling, etc., which can solve the problems of low efficiency and poor wellbore cleaning effect.

Pending Publication Date: 2022-03-29
BC P INC CHINA NAT PETROLEUM CORP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The main purpose of the present invention is to provide a reversible sand flushing cleaning tool to solve the problems of poor wellbore cleaning effect and low efficiency in the prior art

Method used

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  • Reversible sand-washing cleaning tool
  • Reversible sand-washing cleaning tool
  • Reversible sand-washing cleaning tool

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Embodiment Construction

[0027] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0028] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by those of ordinary skill in the art to which this application belongs.

[0029] In the present invention, unless stated otherwise, the used orientation words such as "upper, lower, top, bottom" are usually for the directions shown in the drawings, or for the parts themselves in the vertical, In terms of vertical or gravitational direction; similarly, for the convenience of understanding and description, "inner and outer" refer to the inner and outer relative to the outline of each component itself, but the above orientation words ...

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Abstract

The invention provides a sand washing and cleaning tool capable of reversing. The reversible sand washing tool comprises an upper connector, a barrel, a backward nozzle and a forward nozzle which are connected in sequence. The backward nozzle comprises a first hollow cavity and a second hollow cavity which are communicated with each other, a jet hole is formed in the outer wall of the backward nozzle, and the jet hole is communicated with the first hollow cavity; the reversible sand washing tool further comprises a piston rod which is movably arranged in the barrel and provided with a hollow flow channel, and a water outlet hole is formed in the end, close to the forward nozzle, of the piston rod so that fluid can flow into the backward nozzle and / or the forward nozzle from the water outlet hole. The piston rod is provided with a first position, a second position and a third position sequentially close to the forward nozzle. And the rotation generating impeller is arranged in the forward nozzle and is connected with one end, close to the forward nozzle, of the backward nozzle, so that fluid flows through the rotation generating impeller to form rotational flow and then is sprayed out from an outlet of the forward nozzle. The problems that in the prior art, the shaft cleaning effect is poor, and efficiency is low are solved.

Description

technical field [0001] The invention relates to the technical field of downhole operations, in particular to a reversible sand washing and cleaning tool. Background technique [0002] At present, the coiled tubing downhole operation method in the wellbore preparation process before construction operations is mainly jet cleaning. Typical jet cleaning tools include forward jet, backward jet and front and rear mixed jets. [0003] The forward jet tool is designed by using the flow channel and the rotating mechanism, so that the flow direction of the fluid passes axially forward or obliquely forward to generate high-speed fluid, and the forward impact force is used to destroy the consolidation, thereby forming a mixture with the fluid fluid. Its advantage is that it has a large impact on the consolidation and is destructive. The disadvantage is that the solid particles in the mixed fluid are prone to secondary settlement, and it is not easy to move the debris out of the well, ...

Claims

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Application Information

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IPC IPC(8): E21B21/00E21B21/08
CPCE21B21/00E21B21/08
Inventor 辛永安吕维平朱峰贾夏张正周士杰
Owner BC P INC CHINA NAT PETROLEUM CORP
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