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High-gas-content well sucker-rod pump lifting efficiency-improving device and process pipe column

A technology with rod pump and outer tube, applied in wellbore/well components, production fluid, earthwork drilling and other directions, can solve the problem that the air lock of the oil well pump cannot work normally, the oil well pump is low in fullness, and cannot meet the requirements of high gas-liquid efficiency. Production demand and other issues, to achieve the effect of improving the gas-liquid separation efficiency, increasing the flow rate, and amplifying the production pressure difference

Pending Publication Date: 2022-01-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Oil wells in low-permeability reservoirs are usually produced by rod pump lifting. Due to the influence of gas in the oil well output fluid, the filling degree of the oil well pump is low; when the gas-liquid ratio is high, the air lock of the oil well pump may even fail to work normally.
In order to improve the pump efficiency, a gas-liquid separation device is usually installed at the lower end of the oil well pump. The formation output liquid first passes through the gas-liquid separation device to reduce the gas content of the liquid entering the oil well pump. Due to the limitation of the current technical level, the separation efficiency of the gas-liquid separation device is between About 20%, which cannot meet the efficient production requirements of high gas-liquid ratio oil wells

Method used

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  • High-gas-content well sucker-rod pump lifting efficiency-improving device and process pipe column
  • High-gas-content well sucker-rod pump lifting efficiency-improving device and process pipe column
  • High-gas-content well sucker-rod pump lifting efficiency-improving device and process pipe column

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] see Figure 1 to Figure 4 , the present invention provides a technical solution:

[0044] Rod pump lifting efficiency device for high gas content wells, including:

[0045] Double-way pipe 5, the double-way pipe is provided with an upper central passage and a lower central passage, the upper port of the upper central passage is unimpeded, and the lower port of the lower central passage is unimpeded, and the lower end of the upper central passage and the upper end of the lower central passage are in the double-way pipe. The inside of the body is not connected to each other, and the double-way pipe is also provided with an axial upper eccentric channel and a lower eccentric channel, the upper port of the upper eccentric channel is unimpeded, the lower port communicates with the upper end of the lower central channel, and the lower port of the lower eccentric channel is unimpeded , the upper port communicates with the lower end of the upper central channel;

[0046] Inne...

Embodiment 2

[0063] see Figure 1 to Figure 4 , the present invention provides a technical solution:

[0064] Rod pump lifting efficiency device for high gas content wells, including:

[0065] Double-way pipe 5, the double-way pipe is provided with an upper central passage and a lower central passage, the upper port of the upper central passage is unimpeded, and the lower port of the lower central passage is unimpeded, and the lower end of the upper central passage and the upper end of the lower central passage are in the double-way pipe. The inside of the body is not connected to each other, and the double-way pipe is also provided with an axial upper eccentric channel and a lower eccentric channel, the upper port of the upper eccentric channel is unimpeded, the lower port communicates with the upper end of the lower central channel, and the lower port of the lower eccentric channel is unimpeded , the upper port communicates with the lower end of the upper central channel;

[0066] Inne...

Embodiment 3

[0073] see Figure 1 to Figure 4 , the present invention provides a technical solution:

[0074] Rod pump lifting efficiency device for high gas content wells, including:

[0075] Double-way pipe 5, the double-way pipe is provided with an upper central passage and a lower central passage, the upper port of the upper central passage is unimpeded, and the lower port of the lower central passage is unimpeded, and the lower end of the upper central passage and the upper end of the lower central passage are in the double-way pipe. The inside of the body is not connected to each other, and the double-way pipe is also provided with an axial upper eccentric channel and a lower eccentric channel, the upper port of the upper eccentric channel is unimpeded, the lower port communicates with the upper end of the lower central channel, and the lower port of the lower eccentric channel is unimpeded , the upper port communicates with the lower end of the upper central channel;

[0076] Inne...

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Abstract

The invention discloses a high-gas-content well sucker-rod pump lifting efficiency-improving device and a process pipe column. The high-gas-content well sucker-rod pump lifting efficiency-improving device comprises a two-way pipe, an inner pipe, an outer pipe, a screen pipe and a plug-in seal, wherein the two-way pipe is provided with an upper center channel and a lower center channel, and the two-way pipe is further provided with an axial upper eccentric channel and an axial lower eccentric channel; the upper end of the inner pipe is connected with the two-way pipe, and an upper port of the inner pipe only communicates with a lower port of the lower central channel of the two-way pipe; the inner pipe is sleeved with the outer pipe, an annular space is formed between the inner pipe and the outer pipe, the upper end of the outer pipe is connected with the two-way pipe, and an upper port of the outer pipe only communicates with a lower port of the lower eccentric channel of the two-way pipe; the screen pipe is connected to the lower end of the outer pipe, and the lower end of the screen pipe is connected with the plug-in seal; and the lower end of the plug-in seal is connected with an outer pipe nipple, and the plug-in seal separates the bottom space between the inner pipe and the outer pipe. The gas content of liquid entering an oil well pump is reduced, and the pump efficiency is improved; and meanwhile, oil well bottom flowing pressure is reduced, production pressure difference is enlarged, and oil well productivity is improved.

Description

technical field [0001] The invention relates to the technical field of production of high gas-liquid ratio oil wells, in particular to a rod pump lifting efficiency raising device and a process pipe string for high gas content wells. Background technique [0002] With the development of the oilfield, Shengli Oilfield has gradually increased its efforts to develop low-permeability reservoirs. Low-permeability reservoirs have the characteristics of deep burial, low permeability, and high gas-liquid ratio of oil wells. Oil wells in low-permeability reservoirs are usually produced by rod pump lifting. Affected by the gas contained in the output fluid of the oil well, the filling degree of the oil well pump is low; when the gas-liquid ratio is high, the air lock of the oil well pump may even fail to work normally. In order to improve the pump efficiency, a gas-liquid separation device is usually installed at the lower end of the oil well pump. The formation output liquid first p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/00E21B43/38
CPCE21B43/126E21B43/38
Inventor 智勤功刘丙生杭发琴肖姝金鑫古光明岳振玉马俊华冯辉费秀英
Owner CHINA PETROLEUM & CHEM CORP