Automatic drainage gas recovery device for gas well
A technology for automatic drainage and gas production, which is applied to the valve device of wellbore/well, production fluid, and earth-moving drilling, etc. It can solve the problem of high construction cost, achieve convenient operation, simple structure, and solve the effect of serious wellbore fluid accumulation.
Pending Publication Date: 2020-06-12
中石化石油工程技术服务有限公司 +1
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Problems solved by technology
In addition, there are optimized drainage methods such as pipe strings, bubble drainage, jet pumps, etc., but at present, these drainage aids have certain disadvantages, or need to apply an external power source, or the construction cost is relatively high
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[0021] In order to further elaborate the technical means and effects that the present invention adopts for reaching the intended invention purpose, below in conjunction with the accompanying drawings and preferred embodiments, the specific implementation, structure, features and effects of the present invention are described in detail as follows:
[0022] Such as Figures 1 to 4 As shown, the drainage and gas recovery device for gas wells of the present invention includes formation fluid filter pipe 12, bypass valve 10, automatic drainage and gas recovery mechanism 5, reverse circulation valve 3, gas recovery and liquid discharge end; the bypass valve 10 is provided with Mixed liquid outlet 8; the automatic drainage gas recovery mechanism includes a formation fluid channel, annulus fluid inlet 9 and annulus fluid outlet (not shown); the formation fluid filter pipe communicates with the formation fluid through a bypass valve channel; a sealing device 11 is also provided between...
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The invention discloses an automatic drainage gas recovery device for a gas well. The automatic drainage gas recovery device for the gas well comprises a formation fluid filter pipe, a bypass valve, an automatic drainage gas recovery mechanism, a reverse circulation valve and gas recovery draining end; the bypass valve is provided with a mixed liquid outlet; the automatic drainage gas recovery mechanism comprises a formation fluid channel, an annular effusion inlet and an annular effusion outlet; the formation fluid filter pipe communicates with the formation fluid channel through the bypass valve; a packer is arranged between the formation fluid filter pipe and the bypass valve; the automatic drainage gas recovery mechanism is located between the bypass valve and the reverse circulation valve; the annular effusion inlet is formed below liquid level of annular effusion; and the annular effusion outlet communicates with the gas recovery draining end through the reverse circulation valve. According to the device, automatic drainage gas recovery for the gas well can be realized without application of external power.
Description
technical field [0001] The invention relates to the technical field of downhole tools in the petroleum industry, in particular to an automatic drainage and gas recovery device for gas wells suitable for use in gas well drainage and gas recovery operations when the energy of the gas well itself cannot discharge formation water from the wellbore. Background technique [0002] At present, in the long-term production process of gas wells, one of the main problems is that with the production of gas wells, the gas in the formation is continuously extracted from the ground, the formation energy is continuously reduced, and the gas flow rate is not enough to bring the bottom fluid out of the ground. It also continues to accumulate in the wellbore. In the later stage of gas well exhaust, relying on the energy of the formation itself is not enough to discharge the fluid in the wellbore to the ground. The fluid in the wellbore reaches a certain height, which will seriously affect the g...
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IPC IPC(8): E21B43/00E21B43/08E21B43/12E21B34/06
CPCE21B43/00E21B43/086E21B43/121E21B34/06
Inventor 袁发勇褚晓丹陈龙高云伟杨洁江强徐帮才冯德华孙文常张怡然朱江雷
Owner 中石化石油工程技术服务有限公司