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Pump and packer integrated water exploration and plugging pipe pile and floating bottom plug thereof

An integrated, pump-sealing technology, applied in the fields of fluid production, sealing/packing, wellbore/well components, etc., can solve the problems of piston effect, increased unsealing load, and difficulty in unsealing, and achieve increased cross-sectional area. area, reduce liquid pressure, and facilitate the effect of unsealing

Active Publication Date: 2020-11-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a swimming bottom plug with integrated pump and seal to find and block the water pipe string, so as to solve the problem of piston effect formed during the unsealing process of the lower packer in the prior art, resulting in increased unsealing load and difficulty in unsealing technical problem; the purpose of the present invention is also to provide a pump-seal integrated plugging water pipe string to solve the piston effect formed during the unsealing process of the lower packer in the prior art, resulting in increased unsealing load and difficulty in unsealing technical issues

Method used

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  • Pump and packer integrated water exploration and plugging pipe pile and floating bottom plug thereof
  • Pump and packer integrated water exploration and plugging pipe pile and floating bottom plug thereof
  • Pump and packer integrated water exploration and plugging pipe pile and floating bottom plug thereof

Examples

Experimental program
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Effect test

specific Embodiment 1

[0063] like figure 2 As shown, the pump-seal integrated water pipe string includes an oil pipe 26, and the oil pipe 26 includes pipe string sections connected in series in sequence. The upper part of the oil pipe 26 is connected with the oil well pump 21, and the upper end of the oil well pump 21 is connected with a sucker rod, which drives Oil well pump 21 carries out oil pumping operation. The oil pipe 26 is connected with an upper packer 22 and a lower packer 24 below the oil pump 21, and the upper packer 22 and the lower packer 24 are arranged at intervals in the vertical direction to separate each oil layer 28 .

[0064] In this embodiment, the upper packer 22 is a Y111 packer, and the lower packer 24 is a Y211 packer, wherein both the Y111 packer and the Y211 packer are mature products in the prior art, and here No longer.

[0065] Wherein, the oil pipe 26 is connected with a screen pipe 23, the screen pipe 23 is located between the upper packer 22 and the lower pack...

specific Embodiment 2

[0082] The difference from the specific embodiment 1 is that in embodiment 1, the elastic member is a compression spring 34, and the compression spring 34 is located below the piston 33 to apply an upward elastic force to the piston 33. In this embodiment, the elastic member is a pull spring 34. The spring, the extension spring is above the piston to apply upward elastic force to the piston.

specific Embodiment 3

[0084] The difference with the specific embodiment 1 is that in embodiment 1, the bottom of the piston chamber 35 is detachably connected with a retaining ring 36, and the retaining ring 36 is used to stop the lower end of the compression spring 34. In this embodiment, the retaining ring can be fixed by screws. The lower part of the piston chamber is disassembled and connected. For example, the lower part of the piston chamber is provided with a stepped structure, the stepped surface of the stepped structure is provided with a threaded hole, and the retaining ring is provided with a perforation. The screw is fixed on the lower part of the piston cavity.

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Abstract

The invention relates to a pump and packer integrated water exploration and plugging pipe pile and a floating bottom plug thereof. The floating bottom plug of the pump and packer integrated water exploration and plugging pipe pile comprises a cylinder body with a communication channel extending in the vertical direction, a piston cavity formed in the cylinder body and extending in the vertical direction, a piston slidably and hermetically assembled in the piston cavity, an elastic part and a flow channel, wherein the piston cavity and the communication channel are distributed at an interval inthe radial direction of the cylinder body, and the lower potion of the piston cavity communicates with the communication channel; the piston aims to adjust the volume of the portion, below a lower packer, of the cavity; the elastic part is disposed in the piston cavity and used for applying upward elastic force to the piston; and the flow channel is formed in the cylinder body and used for makingthe portion, above the piston, of the piston cavity communicate with an oil pipe annulus below the lower packer. Due to the design, lay-down setting and lifting unsealing of the pipe pile are facilitated.

Description

technical field [0001] The invention relates to a pump-seal integrated water pipe column for finding plugging and a swimming bottom plug thereof. Background technique [0002] In the middle and late stage of oilfield development, especially in the late stage of oilfield development by water flooding, with the change of formation water content, the layers are divided more and more finely, the contradiction between layers becomes more and more prominent, and high and low aquifers coexist. In order to understand oil layers, stabilize Oil control water, often need to find water plugging work. At present, the commonly used pipe string in the operation of finding plugging water is the pipe string with integrated pump seal and double seal, such as figure 1 As shown, the tubing string is connected with the upper packer 2, the screen 3, the lower packer 4 and the plug 5 in sequence on the tubing 6 under the well pump 1. The tail is connected with a plug 5, and after the two packers...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B34/08E21B34/12E21B43/14
CPCE21B34/08E21B34/12E21B43/14
Inventor 秦世群宋保建王登辉张峰陈旭波林波代吉建郑壮王宇睿
Owner CHINA PETROLEUM & CHEM CORP
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