Oil-gas field pressure energy recovery power generation device
A power generation device, pressure energy technology, applied in engine components, machines/engines, gas/liquid distribution and storage, etc., can solve problems such as increased loss, waste of natural gas, and high production costs
Inactive Publication Date: 2020-10-27
GUIZHOU AEROSPACE TIANMA ELECTRICAL TECH
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Problems solved by technology
[0003] From the perspective of natural gas extraction and processing technology, first, throttling and decompression allow 70% - 80% of the wellhead natural gas pressure to be consumed in useless work; Sand and corrosive substances aggravate its own loss, and the price of a throttling and pressure-reducing valve is about hundreds of thousands, and it needs to be replaced every month in the process of natural gas exploitation, which keeps the exploitation cost high; thirdly, In order to prevent the formation of ice blockage and prevent the formation of hydrates during throttling and depressurization, it is necessary to burn a part of natural gas for heating treatment, resulting in waste of natural gas
Method used
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Embodiment 1
[0029] Using the above scheme, if figure 1 As shown, there are two working tanks, which are respectively the first working tank 5 and the second working tank 9; the number of working tanks corresponding to the intake valve is also two, which are respectively the first intake valve 3 and the second intake valve 15 The number of working tanks corresponding to the return valve is two, namely the first return valve 6 and the second return valve 10; the number of drain valves corresponding to the working tank is two, respectively the first drain valve 7 and the second drain valve 11. There is one expansion tank, the gas expansion tank 8, and four exhaust valves, namely the first exhaust valve 19, the second exhaust valve 18, the third exhaust valve 17, and the fourth exhaust valve 16. The power of the water turbine 12 is output to the generator 13 .
[0030] The specific workflow is as follows:
[0031] A: Open the first water return valve 6, the first exhaust valve 19 and the se...
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The invention provides an oil-gas field pressure energy recovery power generation device. The device comprises a high-pressure natural gas inlet, wherein the high-pressure natural gas inlet communicates with a gas collecting pipeline, the gas collecting pipeline communicates with a plurality of working tanks and at least one expansion tank, the working tanks communicate with the expansion tanks, and a plurality of one-way gas inlet valves and exhaust valves are arranged on inlet and outlet pipelines of the working tanks and the expansion tanks, so that gas forms one-way circulation between theworking tanks and the expansion tanks; and a water return pipe is used for communicating the bottoms of the working tanks, and a water turbine is mounted at the middle section of the water return pipe. According to the device, in practice, a multi-group parallel connection mode is conveniently adopted, and continuous and stable conveying of wellhead natural gas is guaranteed in an alternate circulation working mode; and pressure reduction of the high-pressure natural gas is mainly achieved in the gas expansion tanks, and after expansion in the gas expansion tank, the pressure of the high-pressure natural gas can be effectively reduced to meet the pressure requirement of a natural gas collecting pipe network.
Description
technical field [0001] The invention relates to an oil and gas field pressure energy recovery power generation device. Background technique [0002] Natural gas extraction generally adopts the self-spraying method. The bottom hole pressure of the gas tree is usually 20MPa-100MPa, and the wellhead pressure is usually 20MPa-70MPa. The natural gas pressure of the gas-gathering pipeline network is much lower than that of the wellhead natural gas. For this reason, throttling and pressure-reducing devices are usually installed at the wellhead or downhole to reduce the pressure of the natural gas in the gas well to a safe gas-gathering pipeline network pressure. In the process of natural gas throttling and decompression treatment, in order to prevent the formation of natural gas hydrate and ice blockage caused by the temperature drop, it is usually necessary to heat it. Reduce pressure through the throttle valve. [0003] From the perspective of natural gas extraction and process...
Claims
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IPC IPC(8): F17D1/02F17D3/01F17D3/14F16L55/02F16L55/07F03B13/00B01D35/02
CPCB01D35/02F03B13/00F16L55/02F16L55/07F17D1/02F17D3/01F17D3/14
Inventor 徐幸朱会昆梁力廉琦晏乾红黄伟李剑穆迪张巍马晓钢覃政
Owner GUIZHOU AEROSPACE TIANMA ELECTRICAL TECH