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Oil and gas well structure facilitating pulling out downhole filter pipe column and method for pulling out downhole filter pipe

A technology for filters and oil and gas wells, which is applied in wellbore/well components, earthwork drilling and production, and production fluids, etc., to achieve the effects of simple and feasible methods, convenient production, and reduced production costs

Active Publication Date: 2010-05-05
ANTON BAILIN OILFIELD TECH (BEIJING) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] There is no oil and gas well structure that is convenient for pulling out the downhole filter string and a particularly effective method for pulling out the downhole filter string from the oil and gas well

Method used

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  • Oil and gas well structure facilitating pulling out downhole filter pipe column and method for pulling out downhole filter pipe
  • Oil and gas well structure facilitating pulling out downhole filter pipe column and method for pulling out downhole filter pipe
  • Oil and gas well structure facilitating pulling out downhole filter pipe column and method for pulling out downhole filter pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Such as figure 2As shown, the present invention is an oil and gas well structure that is convenient for pulling out the downhole filter string, including the well wall 1 of the oil and gas well and the downhole filter string 2 lowered into the oil and gas well, and the downhole filter string is close to the wellhead end A packer 4 for hanging the downhole filter string is arranged between the downhole filter string and the well wall, and an annular space is formed between the downhole filter string and the well wall; the annular space between the downhole filter string and the well wall Filled with ultra-light particles6.

Embodiment 2

[0039] Example 2 Extraction method of flow control filter column

[0040] Such as figure 2 As shown, the completion structure as described in Example 1, wherein the ultra-light particles have an average particle diameter of 0.05-0.8mm and a true density of 0.7-1.3g / cm 3 Polypropylene and polyvinyl chloride polymer particles.

[0041] Such as image 3 As shown, the downhole filter string is a flow control filter string 2, and a flow control filter 2-1 is arranged on the downhole filter string; the lifting method of the downhole filter string is as follows:

[0042] 1) Open the packer that hangs the downhole filter string. For the packer that can be lifted and unsealed, the opening method is to lift the packer, and the packer will be automatically unsealed. For the packer that can be rotated and unsealed, the packer is automatically unsealed when the packer is rotated. After unsealing, there is a gap between the packer and the well wall, and the gap becomes a fluid communi...

Embodiment 3

[0046] Example 3 Flow Control Filter Column Extraction Method

[0047] Such as figure 2 As shown, the completion structure as described in Example 1, wherein the ultra-light particles have an average particle diameter of 0.05-0.8mm and a true density of 0.94-1.08g / cm 3 Styrene and divinylbenzene cross-linked copolymer particles.

[0048] Such as Figure 4 As shown, the downhole filter string is a flow control filter string 2, and a flow control filter 2-1 is arranged on the downhole filter string; the lifting method of the downhole filter string is as follows:

[0049] 1) Open the packer that hangs the downhole filter string. For the packer that can be lifted and unsealed, the opening method is to lift the packer, and the packer will be automatically unsealed. For the packer that can be rotated and unsealed, the packer is automatically unsealed when the packer is rotated. After unsealing, there is a gap between the packer and the well wall, and the gap becomes a fluid fl...

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Abstract

The invention discloses an oil and gas well structure facilitating pulling out a downhole filter pipe column and a method for pulling out the downhole filter pipe column from the oil and gas well. The oil and gas well structure facilitating pulling out the downhole filter pipe column comprises an oil and gas well wall and a downhole filter pipe column arranged in the oil and gas well, wherein one end of the downhole filter pipe column, which is near the mouth of the well, is fixedly connected with the well wall; a cavity is formed between the downhole filter pipe column and the well wall; and ultra light particles are filled in the cavity between the downhole filter pipe column and the well wall. The method for pulling out the downhole filter pipe column comprises the following steps of: (1) establishing a channel; (2) emptying injection: injecting ultra light particle carrier fluid and emptying ultra light particles piled up outside the downhole filter pipe column; (3) and pulling out the downhole filter pipe column. The invention can conveniently pull out the downhole filter pipe column from the oil and gas well, thereby facilitating the change and the maintenance of the downhole filter pipe column, the parameter regulation of a current controlled filter and repeat use.

Description

technical field [0001] The invention relates to the field of petroleum exploitation, in particular to an oil-gas well structure for pulling out a downhole filter string and a method for pulling out the downhole filter string from the oil-gas well. Oil and gas wells here refer to production wells in a broad sense in the development of oil and gas fields, including oil wells, gas wells, natural gas wells, injection wells, etc. Background technique [0002] The completion structure of most mechanical sand control oil and gas wells includes oil and gas wells and downhole filter strings that are lowered into oil and gas wells. Oil and gas wells include vertical wells, deviated wells, highly deviated wells and horizontal wells. Such as figure 1 as shown, figure 1 1 is the well wall of the oil and gas well, 2 is the downhole filter string, 3 is the annular space between the downhole filter string and the well wall, and 4 is the packer for hanging the downhole filter string. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/10E21B43/02
CPCE21B43/08E21B43/04E21B49/04E21B49/08E21B43/10
Inventor 裴柏林房娜
Owner ANTON BAILIN OILFIELD TECH (BEIJING) CO LTD
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