Well completion sand prevention process and sand prevention strings thereof

A sand control pipe and process technology, applied in drilling pipes, casings, drilling equipment, etc., can solve the problems of single treatment measures, affecting the operation progress, and low one-time success rate, so as to meet the requirements of sand control technology, reduce operation risks, and solve the problems of sand control. full effect

Active Publication Date: 2014-02-12
STARSE ENERGY & TECH GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] a) Before the sand control string is drilled to the design position, in case of complicated situations, the treatment measures are single, and can only be lifted by lifting, lowering the active string, and small displacement circulation. Since the setting tool is not allowed to withstand t...

Method used

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  • Well completion sand prevention process and sand prevention strings thereof
  • Well completion sand prevention process and sand prevention strings thereof
  • Well completion sand prevention process and sand prevention strings thereof

Examples

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Embodiment Construction

[0084] Below in conjunction with accompanying drawing, structural principle and working principle of the present invention are specifically described:

[0085] see figure 2 , figure 2 It is a structural schematic diagram of a sand control pipe string according to an embodiment of the present invention. The sand control pipe string used in the sand control process of well completion of the present invention includes an outer pipe string 1 and an inner pipe string 2, the inner pipe string 2 is located in the lumen of the outer pipe string 1 and is connected to the outer pipe string 1 Coaxially arranged, the inner pipe string 2 includes an insertion sealing cylinder 21, a positioning head 22 and a flushing tube 23 connected sequentially from bottom to top, and the outer pipe string 1 includes a sealing cylinder 11 connected sequentially from bottom to top , a screen pipe 12 and a blind pipe 13, the tops of the blind pipe 13 and the flushing pipe 23 are respectively connected ...

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PUM

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Abstract

Disclosed are a well completion sand prevention process and sand prevention strings thereof. The process comprises the following steps of assembling an inner string and an outer ring; mounting a hydraulic rotation device; connecting a top packer and a setting tool; performing function testing; drilling down to a set position; performing completion fluid replacement, gel breaking fluid replacement, gel breaking and well flushing; performing ball feeding, setting the top packer and examining the sealing performance; pulling out a feeding drill and the inner string. The sand prevention strings comprise the outer string and the inner string, the inner string is arranged inside the cavity of the outer string and comprises an insertion seal, a positioning head and a flushing pipe, and the outer string comprises a sealing bore, a screen pipe and a blank tubing; the tops of the blank tubing and the flushing pipe are connected with the top packer, and the top packer is connected with the feeding drill through the setting tool; the outside of the outer string is also provided with the hydraulic rotation device, and the inside of the inner string is provided with a fluid path for the driving fluid of the hydraulic rotation device to pass through; the hydraulic rotation device is connected with a surface pump through the fluid path.

Description

technical field [0001] The invention relates to a well completion technology in oil exploitation, in particular to a well completion sand control technology and a sand control pipe string. Background technique [0002] In the prior art, the sand control pipe string of the well completion sand control technology relies on the self gravity of the pipe string to overcome the buoyancy and the frictional resistance in the casing and the open hole to run in. see figure 1 , figure 1 It is a schematic diagram of the structure of the sand control string in the prior art. The bottom of the sand control pipe string in the prior art is a floating shoe 10 with a round head. The outer pipe string mainly includes the floating shoe 10, the well cleaning sealing cylinder 20, the screen pipe 30, the blind pipe 40, etc., which play the role of sand control and isolation; The pipe string mainly includes insertion seal 50, positioning head 60, flushing pipe 70, etc., to establish a circulatio...

Claims

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Application Information

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IPC IPC(8): E21B43/02E21B17/00
Inventor 易会安范白涛温干亮陈善饮马自江丁柏松昝志恩李文飞谢红英陈光利
Owner STARSE ENERGY & TECH GROUP
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