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Downhole three-phase separating device

A technology of three-phase separation and outer pipe, which is applied in the direction of wellbore/well components, cleaning equipment, production fluid, etc., and can solve the problems of short protection distance, limited protection distance, shortened protection time and crude oil separation

Inactive Publication Date: 2014-01-22
张兵
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are mainly physical treatment and chemical treatment for oil well anti-wax, anti-scaling and anti-corrosion prevention. The physical method has a strong magnetic anti-wax and anti-scaling device, which has a protective effect but the protection distance is short, and the phenomenon of high-temperature demagnetization of strong magnetic materials will reduce its effect. Effect, the chemical treatment method is to fill the anti-wax, anti-scaling and anti-corrosion chemical agents in the anti-wax, anti-scaling and anti-corrosion device. This method has a certain effect, but with the consumption and loss of these chemicals, the control effect will be weakened and its protection The time will also be shortened, and it will also have adverse effects on the crude oil separation and refining equipment in the later stage. In addition, the cathodic protector that protects the main body by sacrificing the anode material is mainly aimed at anti-corrosion, and the protection distance is limited and its own consumption is serious.

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Embodiment Construction

[0018] Since the present invention is composed of a gas-liquid separation grit setting module and a wax-proof, anti-scaling and anti-corrosion module, the specific embodiments of the gas-liquid separation and grit setting module, the wax-proof, anti-scaling and anti-corrosion module will be described below in conjunction with the accompanying drawings.

[0019] The first embodiment of the gas-liquid separation sand settling module of the present invention, with image 3It shows that the specific structure of the gas-liquid separation and sand settling module in this embodiment consists of an upper joint 1, an exhaust valve 2, an upper outer pipe 3, a gas collection chamber 13, a central pipe 5, a primary foam breaking body 4, and a secondary breaking body. Bubble body 6, middle collar 8, lower outer tube 18, spiral blade 9, lower joint 12, wherein the upper end of upper outer tube 3 is connected with one end of upper joint 1, the other end of upper outer tube 3 is connected wit...

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Abstract

The invention relates to a downhole three-phase separating device which comprises a two-stage bubble-breaking gas-liquid separating mechanism and cyclone sand settling three-phase separating mechanism. Bubble breaking separation is organically combined with gravity cyclone sand settling three-phase separation, multi-phase flow output liquid is subjected to gas-liquid separation through the bubble-breaking gas-liquid separating mechanism and then subjected to solid-gas-liquid separation through the cyclone sand settling separating mechanism, during the process, heavy solid phase is thrown to the periphery under centrifugal force and gravity and settled to the bottom under gravity, light liquid enters a central pipe, the lightest gas is emitted upwards along gas guide holes to a gas collecting cavity, and three-phase multi-stage separation is achieved. By the downhole three-phase separating device suitable for output liquid with wider vapor liquid ratio range, mud and sand discharge of oil wells can be dealt with effectively, and for oil wells with sufficient stratum liquid supply capacity, pumping effect can be increased, oil well yield can be increased, pump detection cycle can be prolonged, and production effectiveness can be increased.

Description

1. Technical field: [0001] The invention relates to a solid, liquid and gas three-phase separation device installed under an oil pump in an oil well in an oil field to process the oil well output liquid, especially a modular downhole with two-stage foam breaking separation and sand settling functions Three-phase separation device. 2. Background technology: [0002] The existing downhole separation devices mainly include gas-liquid separation, solid-liquid separation and solid-liquid-gas three-phase separation from different separation media. There are many kinds of downhole separation devices. In the early days, there were gravity separation devices with pipe and casing, and there are also cyclone centrifugal separation devices that can separate gas and liquid, and at the same time separate solid phase and settle solid phase, because the gravity separation of gas and liquid is related to its downlink distance. In order to achieve the ideal separation effect, the gravity sep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/38E21B37/00
Inventor 张兵
Owner 张兵
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