A liquid drainage gas collection string and its production method

A gas production pipe and pipe body technology, which is applied in the field of liquid-draining gas production string and its production, can solve the problem that the use speed string cannot meet the requirements of well control, and achieves the improvement of the liquid-carrying capacity of the whole wellbore, the reduction of operating costs, and the reduction of the operating cost. The effect of string work

Active Publication Date: 2020-09-01
CHINA NAT OFFSHORE OIL CORP +1
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Problems solved by technology

[0004] The purpose of the present invention is to provide a liquid drainage and gas production string and its production method. This invention effectively solves the problem that the speed string used in the current offshore oil field liquid drainage and gas recovery well cannot meet the well control requirements, and increases the fluid flow rate in the wellbore of the gas well. Thereby improving the liquid-carrying capacity of gas wells and meeting the needs of gas well drainage and gas production in offshore oilfields

Method used

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  • A liquid drainage gas collection string and its production method
  • A liquid drainage gas collection string and its production method
  • A liquid drainage gas collection string and its production method

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Embodiment Construction

[0027] 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.

[0028] like figure 1 As shown, the present invention provides a liquid drainage and gas production string, which is composed of a pipe body 1 with a liquid control pipeline 2, and the pipe body 1 is sequentially provided with a lower safety valve 3, a sliding sleeve 9, a positioning seal 10 and a second A packer 11, a second packer 4, a hanger 6, a velocity tube 7 and a blocker 8 are arranged between the safety valve 3 and the sliding sleeve 9; the upper body 61 of the hanger 6 passes through the first The second packer 4 passes through the safety valve 3 and is connected in the pipe body 1, and its lower body 64 is connected with the plug 8 through the velocity pipe 7; the hanger 6 is movably connected with a vortex...

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Abstract

The invention discloses a liquid-unloading gas recovery pipe string. The liquid-unloading gas recovery pipe string is composed of a pipe body with a liquid-controlled pipeline, and the pipe body is sequentially provided with a subsurface safety valve, a sliding sleeve, a positioning seal and a first packer; a second packer, a hanger, a speed pipe string and a blanking plug are arranged between thesubsurface safety valve and the sliding sleeve; an upper body of the hanger is connected into the pipe body sequentially through the second packer and the safety valve, and a lower body of the hangeris connected with the blanking plug through the speed pipe string; and an eddy current tool is movably connected to the interior of the hanger. According to the liquid-unloading gas recovery pipe string, the flow velocity of fluid in a wellbore of a gas well is increased, so that the liquid carrying ability of the gas well is improved, and requirements of liquid-unloading gas recovery in an offshore oilfield gas well are met.

Description

technical field [0001] The invention relates to the liquid drainage and gas recovery technology of the downhole non-moving pipe string and the downhole suspended velocity pipe string, in particular to a liquid drainage gas recovery pipe string and a production method thereof. Background technique [0002] Continuous velocity tube is a kind of rapid operation equipment for oilfields, widely used in slimhole production wells, coiled tubing fracturing wells, coiled tubing electric pumps and other operations. The continuous velocity tube is to install a coiled tube with a smaller diameter in the wellbore as a velocity string, which can reduce the critical liquid-carrying velocity to a certain extent, increase the flow velocity of the gas-liquid mixture in the wellbore, and thus improve the liquid-carrying capacity of the gas well. However, there is a downhole safety valve in the gas well string in the offshore oil field, and the suspension of the conventional velocity string at ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/01E21B33/038E21B33/12
Inventor 朱橙崔国亮钟宝库罗少锋李孟超姜雨省韩琦张伦玮田发超刘华伟
Owner CHINA NAT OFFSHORE OIL CORP
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