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Reverse circulation forward sand washing type horizontal well rotational flow sand washing tool

A horizontal well and reverse circulation technology, which is applied in the direction of flushing wellbore, wellbore/well components, earthwork drilling and production, etc., can solve the problem of insufficient ability of sand flushing and well flushing, shorten the time of sand flushing operation, and enhance sand flushing Well capacity, the effect of increasing the impact force of the liquid

Pending Publication Date: 2020-12-18
YANGTZE UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, it is necessary to provide a reverse circulation positive sand washing horizontal well swirling sand washing tool to solve the problem of insufficient sand washing ability of existing sand washing tools

Method used

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  • Reverse circulation forward sand washing type horizontal well rotational flow sand washing tool
  • Reverse circulation forward sand washing type horizontal well rotational flow sand washing tool
  • Reverse circulation forward sand washing type horizontal well rotational flow sand washing tool

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Embodiment Construction

[0032] Preferred embodiments of the present invention will be specifically described below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the application and together with the embodiments of the present invention are used to explain the principle of the present invention, but not to limit the scope of the present invention.

[0033] Such as figure 1 As shown, the embodiment of the present invention provides a reverse circulation positive sand washing horizontal well swirl sand washing tool, the swirl sand washing tool is sleeved in a sleeve (not shown in the figure), and the swirl sand washing tool is The flow sand flushing tool includes a fluid reversing device 1 , a turbo swirling device 2 and a rotary flushing device 3 . The fluid reversing device 1 is mainly used for reversing and separating the flushing fluid and the sand-mixing fluid produced after flushing, and the turbo-increasing device 2 is mainly used for pressu...

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Abstract

The invention relates to a reverse circulation forward sand washing type horizontal well rotational flow sand washing tool. The rotational flow sand washing tool is sleeved with a sleeve and comprisesa fluid reversing device, a turbine rotation increasing device and a rotary washing device, wherein a fluid reversing valve comprises a tubular reversing valve and a sealing ring; an inverted-Z-shaped partition plate is arranged in the tubular reversing valve; the upper tubular reversing valve and the right end of the inverted-Z-shaped partition plate are spaced to form a first annulus; the lowertubular reversing valve and the left end of the inverted-Z-shaped partition plate are spaced to form a second annulus; and the tubular reversing valve is sleeved with the sealing ring, and the sealing ring is located between the first annulus and the second annulus. According to the reverse circulation forward sand washing type horizontal well rotational flow sand washing tool, sand chips in sandmixing liquid are effectively prevented from forming secondary deposition at a deflecting section, the upward movement success rate of the sand mixing liquid is greatly increased, the operation timeis shortened, and efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of drilling equipment, in particular to a swirling flow sand washing tool for a reverse circulation positive sand washing horizontal well. Background technique [0002] In the latter part of the last century, the rapid development of horizontal well drilling technology has brought great comprehensive benefits to oilfield development. The drilling technology and oil production technology of horizontal wells are also becoming more and more mature. development requirements. With the development and production of the oil field, the pressure of the oil layer will gradually decrease, and the degree of deficit of the oil layer will also increase, which will destroy the original balance of the formation to a large extent. Once the bottom hole leakage is serious, the formation sand will flow together with the formation fluid Migration into the pumping wellbore will cause the perforation section to be buried by depos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B21/00
CPCE21B21/00
Inventor 冯定王高磊陈文康
Owner YANGTZE UNIVERSITY
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