Results 11 to 20 of about 588,838 (198)
Improvement and application of a novel drainage pump of deep coalbed methane wells in south Yanchuan [PDF]
Youqicang pingjia yu kaifa, 2023 In order to solve the problem of frequent well laying in the coalbed methane field in south Yanchuan due to sand production（pulverized coal）, a novel drainage pump in south Yanchuan coalbed methane well has been developed. The novel drainage pump is designed as a forced pull rod hemisphere-type seal, and the plunger assembly adopts a hollow design. The
WU Zhuangkun, ZHANG Honglu, CHI Yuxuan, YIN Zhonghua, ZHANG Zhuang
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Meikuang Anquan, 2022 Aiming at the reservoir damage of low-yield coalbed methane wells in Junggar Basin block during the drainage stage, in this paper, the drainage situation of typical coalbed methane wells in the block is systematically analyzed and reservoir damage types and prevention and control methods of coalbed methane wells in the drainage stage are discussed. The
FAN Yigang +6 more
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Drainage system research and application of deep coalbed methane gas reservoirs in Daning-Jixian block [PDF]
Meitan xuebaoCompared to Medium-shallow coalbed methane, deep coalbed methane exhibits significant differences in occurrence state, production mechanism, lifting technology, etc.As an important part of coalbed methane development, drainage directly impact the gas production of deep coalbed methane wells.
Ming CHEN +9 more
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Gas collection technology for coalbed methane well site
Meikuang Anquan, 2021 Aiming at the high gas content at the wellhead and drainage outlet of coalbed methane well site, which affects the normal safety production and is a serious waste of resources. The shortages of the existing wellhead sealing device and water pipeline gas
PANG Tao
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Monitoring system for accurate coalbed methane drainage
Gong-kuang zidonghua, 2020 In view of problems existing in conventional coalbed methane drainage system, such as low control accuracy, high labor intensity, inability to operate according to drainage and extraction rules, and high production cost, a monitoring system for accurate coalbed methane drainage was designed.
LIU Lei
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Meitian dizhi yu kantanBackground In the coal mining areas of China, coalbed methane (coal mine gas) occurs under complex conditions, rendering it difficult to achieve its efficient resource exploitation and effective hazard control using a single technique.AdvancesAs ...
Shijun HAO +5 more
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Isothermal Desorption Hysteretic Model for Deep Coalbed Methane Development
Geofluids, 2022 The adsorption/desorption mechanism of coalbed methane is significant for gas control and coalbed methane exploitation; scholars have done a lot of research on it and generally have confidence in that temperature, pressure, and moisture are central ...
Songlei Tang +3 more
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Chemical Engineering Transactions, 2017 The coalbed methane (CBM) drainage effect of surface drainage after 5 years in Jincheng mining area was detected using the numerical simulation and measured method. The surface drainage effect of CBM detected by the measured method is adopted first time in China.
Siqing Sun
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Gong-kuang zidonghua, 2020 Hydraulic fracturing technology is widely used in fracturing coal seam and improving efficiency of coalbed methane drainage, but due to large water consumption, environment pollution by fracturing fluid and other problems, it is difficult to be used in water-deficient areas where are rich in coalbed methane.
ZHAI Cheng, XU Jizhao
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Meitan kexue jishu, 2022 In order to solve the problems that restrict the efficient development of coalbed methane resources under the conditions of soft and low permeability outburst coal seams in Huainan Mining Area, such as complex coal seam structure, multi-source gas ...
Xiangxi KONG +8 more
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