Oil-layer setting packing method and special self-pressurization controller

A controller and self-pressurization technology, which is applied in the field of setting and sealing oil layer and special self-pressurizing controller, which can solve the problems of high cost, difficulty in running, and high risk.

Pending Publication Date: 2017-03-08
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The third method is that the packer is connected to the wellhead equipment through a capillary for pressure setting. In this method, the entire string needs to be run with a c

Method used

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  • Oil-layer setting packing method and special self-pressurization controller
  • Oil-layer setting packing method and special self-pressurization controller
  • Oil-layer setting packing method and special self-pressurization controller

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Embodiment Construction

[0020] The detailed description and technical content of the present invention are described below with the accompanying drawings, but the accompanying drawings are only provided for reference and description, and are not intended to limit the present invention.

[0021] according to Figure 1-3 , a method for setting and sealing an oil layer. Firstly, the setting pipe string is lowered to a predetermined position in the downhole, and then the self-pressurization controller is activated to complete the setting of the packer; The method of setting the packer to isolate the oil layer is to install the self-pressurization control packer setting string in the downhole according to the design position requirements. The string is controlled by the self-pressurization controller 1, the hydraulic control pipeline 2. It is composed of packer 3. In this pipe string, anchors, safety joints and other tools can be connected to the upper part of the booster controller 1. At least one set of...

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Abstract

The invention discloses an oil-layer setting packing method and a special self-pressurization controller. The method includes the steps that a setting pipe column is put into the underground preset position, and then the self-pressurization controller is started to complete setting of packers; the setting pipe column comprises a pipe column body, the self-pressurization controller and the packers, wherein the self-pressurization controller and the packers are sequentially connected on the pipe column body from top to bottom, and the self-pressurization controller and the packers are also connected through control pipes; the self-pressurization controller is composed of a starting assembly, a pressurizing assembly and a pressure transmission joint, wherein the starting assembly, the pressurizing assembly and the pressure transmission joint are sequentially connected from top to bottom, and a high pressure area is formed between the pressurizing assembly and the pressure transmission joint; the pressurizing assembly adjusts increasing and reducing of the pressure in the high pressure area, and the pressure transmission joint is connected with a liquid control pipe through a quick joint; after the pressurizing assembly is started by the starting assembly, the pressure in the high pressure are is increased to the required set pressure through the pressurizing assembly, the pressure transmission joint is connected with the liquid control pipe through the quick joint, high pressure is transferred to the packers to allow differential pressure is generated inside and outside the packers to achieve setting.

Description

technical field [0001] The invention relates to oil well packer sealing oil layer technology, in particular to a method for setting and sealing oil layer and a special self-pressurization controller. Background technique [0002] At present, the use of packers to isolate oil layers is widely used in vertical wells, deviated wells, and horizontal wells for layered reconstruction, oil testing, oil production, testing, water search, and water plugging. There are six main methods of setting packers. Among them, the hydraulically driven method of setting packers has the advantages of convenient operation, high reliability, and no restriction of well type, and its application scale is gradually expanding. [0003] At present, the domestic and foreign methods that can be retrieved use hydraulically driven setting packers to isolate the oil layer. The setting pressure difference required for packer setting is mainly generated by two forms, one depends on the supporting tools in the ...

Claims

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Application Information

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IPC IPC(8): E21B33/12
Inventor 叶金胜吕芳蕾张峰安申法张建于昭东田浩然周景彩魏剑飞高恒超
Owner CHINA PETROLEUM & CHEM CORP
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