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Vortex sand washing device

A technology of sand flushing and eddy current, which is applied in flushing wellbore, wellbore/well components, earth-moving drilling, etc. It can solve the problems of in-place, long time-consuming and failure of the process string, and achieve high operation success rate, flushing and other problems. High sand efficiency and adaptable effect

Inactive Publication Date: 2012-12-19
RES INST OF PETROLEUM ENG SHENGLI OIL FIELD SINOPEC
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AI Technical Summary

Problems solved by technology

This varnish tube sand washing method not only takes a long time and uses a lot of sand washing fluid, but also cannot guarantee the sand washing effect
In oil fields and mines, there are many phenomena where the process string is not in place due to incomplete sand washing, resulting in insignificant or complete failure of process measures

Method used

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  • Vortex sand washing device
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Examples

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Embodiment Construction

[0015] refer to Figure 1-Figure 4 , an eddy current sand washing device, comprising an upper joint, a short joint of oil pipe, a conversion body, a sand washing core pipe, a rotating body and a sand washing head. The upper joint 1 is sequentially connected with the tubing nipple 4, the conversion body 5, the sand washing core pipe 7, the rotating body 10 and the sand washing head 14; An annulus 3 is formed, and a plug 53 is installed at the lower end of the short joint 51 in the conversion body; there is a flow passage in the axial direction between the inner short joint 51 and the outer short joint 52 of the conversion body; the rotating body 10 is installed on the sand washing core pipe 7 and the outside of the sand washing head 14; a bearing hoop 13 is installed between the lower inner cavity of the rotating body 10 and the sand washing head 14, and a conversion hole 9 is arranged on the sand washing core pipe 7. A y-shaped sealing ring 11 is installed on the sand flushin...

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Abstract

The invention discloses a vortex sand washing device which comprises an upper connector, a tubing pup joint, a conversion body, a sand washing core tube, a revolving body and a sand washing head, wherein the upper connector is connected with the tubing pup joint, the conversion body, the sand washing core tube, the revolving body and the sand washing head in sequence; an annulus is formed betweenthe upper part of the inner pup joint of the conversion body and the cavity of the tubing pup joint; the lower end of the inner pup joint of the conversion body is provided with a stopper; a flow channel is arranged axially between the inner pup joint and the outer pup joint of the conversion body; the revolving body is arranged outside the sand washing core pipe and the sand washing head; and a bearing hoop is arranged between the lower cavity of the revolving body and the sand washing head. The vortex sand washing device adopts a double-tube structure, thus providing different channels for washing and upward-returning of sand washing fluid, and is characterized by high adaptability, high sand washing efficiency, high sand washing and well cleaning speed, good effect, high operation success rate and the like, thus being adapted to sand washing operation of common oil gas wells, especially to sand washing operation of highly-deviated wells and horizontal wells.

Description

1. Technical field [0001] The invention relates to a petroleum workover tool, in particular to a vortex sand washing device. 2. Background technology [0002] In the process of oil workover operations, oil well sand washing operations are often carried out, especially in recent years with the large-scale popularization and application of large-diameter oil wells or horizontal wells. The carrying capacity of the horizontal well is low, or due to the special wellbore structure of the horizontal well, it is difficult for the formation sand deposited in the lower part of the horizontal well to be washed out of the well. This varnish tube sand washing method not only takes a long time and uses a large amount of sand washing liquid, but also cannot guarantee the sand washing effect. In oil fields and mines, there are many phenomena where the process string is not in place due to incomplete sand washing, resulting in insignificant or complete failure of process measures. The vort...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B21/14
Inventor 王世虎郑家丰杨勇赵明宸亓传和彭绪勇张士学覃忠校顾海红
Owner RES INST OF PETROLEUM ENG SHENGLI OIL FIELD SINOPEC
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