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Precision-adjustable composite sand control screen pipe

A sand control screen, high-precision technology, applied in wellbore/well components, production fluids, earth-moving drilling, etc., can solve problems such as large-scale prefabrication unfavorable for processing plants, difficulty in meeting use requirements, poor sealing at joints, etc., to avoid The effect of working pressure and working strength, good sealing, convenient installation and connection

Active Publication Date: 2021-02-09
山东华冠能源技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, if the above screens are to be used, they must be prefabricated according to the oil reservoir, and once manufactured, they cannot be changed, which makes their scope of application narrow, which is not conducive to large-scale prefabrication in advance by processing plants, resulting in the need to work overtime during processing. It will cause greater working pressure and work intensity for production personnel; in addition, the existing screen pipes are more troublesome to install, and the joints after installation are poorly sealed, making it difficult to meet the use requirements

Method used

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  • Precision-adjustable composite sand control screen pipe
  • Precision-adjustable composite sand control screen pipe
  • Precision-adjustable composite sand control screen pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Such as figure 1 As shown, a precision-adjustable composite sand control screen according to an embodiment of the present invention includes a base pipe 1 , a precision-adjustable sand control mechanism 2 and a connecting mechanism 3 .

[0048] Among them, such as figure 1 , image 3 with Figure 9 As shown, both ends of the base pipe 1 are open structures, and a number of sieve holes 5 are uniformly opened on the wall of the middle part of the base pipe 1, and one end of the base pipe 1 is provided with a threaded part 6 outside, The other end of the base pipe 1 is welded with a connecting flange 7, and several mounting holes 10 are opened on the connecting flange 7 near its edge.

[0049] Among them, such as Figure 1-Figure 3 As shown, the precision adjustable sand control mechanism 2 includes a first annular connection seat 201, a second annular connection seat 202, a winding wire 203, a guide sleeve 204, an annular abutment seat 205 and an adjustment nut 206. T...

Embodiment 2

[0054] Such as Figure 6-Figure 7 As shown, the difference between this embodiment and Embodiment 1 is that the composite sand control screen with adjustable precision also includes a protection mechanism 4, and the protection mechanism 4 includes several circular through holes 404, several hollow round rods 403, an annular fixing seat 401 and several guide rods 402, several of the circular through holes 404 are opened on the second annular connecting seat 202, and several of the circular through holes 404 surround the second annular connecting seat The central axis of 202 is arranged at an equal angle in the circumferential direction, and several hollow round rods 403 are movably installed in the insides of several circular through holes 404, and several hollow round rods 403 are arranged parallel to the base pipe 1, And one end of the plurality of hollow round rods 403 is fixedly connected to a side of the first annular connecting seat 201 facing the second annular connectin...

Embodiment 3

[0057] Such as image 3 , Figure 7 with Figure 9 As shown, the difference between this embodiment and Embodiment 2 is that the first annular connecting seat 201, the second annular connecting seat 202, the annular fixing seat 401, the hollow round rod 403 and the The guide rods 402 are all made of stainless steel, the width of the gap between two adjacent hollow round rods 403 is 0.2-0.3 times the diameter of the sieve hole 5, and the installation holes 10 are at least four, and at least The four mounting holes 10 are circumferentially arranged at equal angles around the central axis of the connecting flange 7 .

[0058] By adopting the above technical scheme, the first annular connecting seat 201, the second annular connecting seat 202, the annular fixing seat 401, the hollow round rod 403 and the guide rod 402 are all made of stainless steel, so that the precision adjustable sand control mechanism 2 and the protective mechanism 4 has better load-bearing strength, less p...

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Abstract

The invention discloses a precision-adjustable composite sand control screen pipe. The screen pipe comprises a base pipe, a precision-adjustable sand control mechanism and a connecting mechanism; a plurality of screen holes are evenly formed in the pipe wall of the middle of the base pipe; the precision-adjustable sand control mechanism comprises a first annular connecting base, a second annular connecting base, a winding wire, a guide sleeve, an annular abutting base and an adjusting nut; and the connecting mechanism comprises a fixing sleeve, a connecting cylinder, a locking nut, an annularcheck ring, a first sealing ring and a second sealing ring. According to the precision-adjustable composite sand control screen pipe, the screening precision can be adjusted, prefabrication accordingto an oil reservoir is not needed, the screening precision can still be changed after manufacturing, the application range is relatively large, large-scale prefabrication of a processing plant in advance is facilitated, and the phenomenon that a worker often needs to work at an overtime point during processing can be avoided. Therefore, large work pressure and work intensity are prevented from being caused to production personnel, installation and connection are convenient, the sealing performance of the connection position after installation is good, and the use requirement can be met.

Description

technical field [0001] The invention relates to the technical field of sand control equipment for oil and gas wells, in particular to a composite sand control screen with adjustable precision. Background technique [0002] At present, the development of most oil and gas reservoirs in the world has entered the middle and late stages, and the problem of sand production is common in the development process. Sand production has a huge impact on the exploitation of oil and gas reservoirs, mainly including reducing or even stopping production of oil and gas wells; aggravating the wear and tear of downhole equipment and surface equipment; the most serious is causing casing damage, and eventually oil and gas wells are scrapped. For such problems, sand control is the most effective way, through the control of sand production in oil and gas wells, to prevent its impact on the normal production of oil and gas wells. The screening accuracy has a great influence on the recovery factor o...

Claims

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Application Information

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IPC IPC(8): E21B43/08
CPCE21B43/086
Inventor 李明张弦张伟
Owner 山东华冠能源技术有限公司
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