Coal breakage using abrasive liquid nitrogen jet and its implications for coalbed methane recovery

Yang, Ruiyue; Hong, Chunyang; Huang, Zhongwei; Song, Xianzhi; Zhang, Shikun; Wen, Haitao

doi:10.1016/j.apenergy.2019.113485

Cited by 57 publications

(12 citation statements)

References 55 publications

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“… 33 − 35 When applying the application of the technology, a borehole is firstly milled on the casing of the coal seam (gas reservoir) with a drill rig, and then a high-pressure hose with a jet bit is used to drill multiple wells in different directions of the coal seam with the aid of a high-pressure water jet. 36 The specific steps are as follows: (1) The depth of the casing window is determined by magnetic positioning and natural gamma logging technology, while the orientation of it is measured using a gyroscope inclinometer. (2) A φ22 mm borehole is drilled on the target casing using a drill bit.…”

Section: Mrbhf Methodsmentioning

confidence: 99%

“…Radial boreholes are horizontal wells whose curvature radii are smaller than those of conventional drilling. By adopting this technology, one or more horizontal branch boreholes can be drilled along the radial direction in a vertical well. − When applying the application of the technology, a borehole is firstly milled on the casing of the coal seam (gas reservoir) with a drill rig, and then a high-pressure hose with a jet bit is used to drill multiple wells in different directions of the coal seam with the aid of a high-pressure water jet . The specific steps are as follows: (1) The depth of the casing window is determined by magnetic positioning and natural gamma logging technology, while the orientation of it is measured using a gyroscope inclinometer.…”

Section: Mrbhf Methodsmentioning

confidence: 99%

See 1 more Smart Citation

A Method of Quick and Safe Coal Uncovering by Hydraulic Fracturing in a Multibranch Radial Hole with a Coalbed Methane Well

Liu

Wei

et al. 2020

ACS Omega

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Coal and gas outburst accidents occur most frequently during coal uncovering operation, and uncovering-induced outburst accidents have caused great economic losses and casualties. In order to quickly and safely uncover the outburst coal seam at the air intake shaft in panel 2, Zhaozhuang Coal Mine has come up with the technology of multibranch radial borehole hydraulic fracturing (MRBHF) coal uncovering technology in the surface coalbed methane (CBM) well. By conducting fracturing of constructed radial boreholes in the CBM well, the technology increases fractures, enhancing coal permeability and raising gas drainage volume in the uncovering area. It brings the following three major benefits: (1) uncovering coal efficiently, rapidly, and safely; (2) greatly reducing engineering quantity, coal uncovering period, and construction cost, i.e., significantly improving the economic benefits; and (3) efficiently reusing the CBM well. Compared with conventional uncovering measures, the proposed technology shortens the uncovering period by 118 d, enhances the coal seam permeability by 3.55 times, raises the gas drainage rate by 22%, increases the gas drainage volume by 1.93 times, and reduces the engineering volume of drilling by 12,000 m. The safe, rapid, economical, and applicable technology provides scientific guidance and reference for domestic and foreign shaft coal uncovering engineering and possesses important economic and social values and application prospect for safe and efficient production of coal mines.

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Section: Mrbhf Methodsmentioning

confidence: 99%

Section: Mrbhf Methodsmentioning

confidence: 99%

A Method of Quick and Safe Coal Uncovering by Hydraulic Fracturing in a Multibranch Radial Hole with a Coalbed Methane Well

Liu

Wei

et al. 2020

ACS Omega

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Section: Ln2 Fracturing Processesmentioning

confidence: 99%

“…Nitrogen has a low density and is unable to carry abrasives . Without the injection of abrasives, cracks that have been compressed will slowly close under pressure over time, which reduces the efficiency of subsequent fracturing efforts and the economic benefits .…”

Section: Challenges and Future Perspectivesmentioning

confidence: 99%

Advances in Liquid Nitrogen Fracturing for Unconventional Oil and Gas Development: A Review

et al. 2022

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Liquid nitrogen (LN 2 ) fracturing is an anhydrous fracturing technology that enhances coal permeability and supports unconventional oil and gas exploitation. In this Review, we provide a systematic review of five aspects of LN 2 fracturing. They are the history of the technology's development, research topics, factors influencing fracturing efficiency, fracturing mechanism, and engineering processes and systems. Liquid nitrogen fracturing transforms coal and rock pore structure through mechanisms such as low temperature, freeze−thaw damage, and gas expansion. It changes coal and rock mechanical properties and improves the pore penetration and efficiency of unconventional oil and gas extraction. However, in-depth studies are still required in many areas. They include theoretical studies of twophase nitrogen flow in coal and rock, development of technical equipment to support field operations, and plans to monitor and evaluate fracturing efficiency. On the basis of the advances in LN 2 fracturing research and the challenges, we conclude that future research should focus on multiphase flow and field equipment and technology.

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“…2,3 It is worth mentioning that due to the stimulation of various industries, high-speed water jet technology has achieved significant progress in the past few decades. [4][5][6] With its unique advantages of environmental protection and high efficiency, high-pressure water jets are widely used in energy industries for applications, such as quarry rock-breaking, 7,8 coal seam drilling, 9,10 oil drilling, 11 geothermal exploitation, 12 and deep-sea shallow drilling. 13 In summary, the high-pressure water jet is considered one of the most promising assisted rockbreaking technologies and can further improve the rate of penetration.…”

Section: Introductionmentioning

confidence: 99%

Effects of pulsating fluid at nozzle inlet on the output characteristics of common and self‐excited oscillation nozzle

Feng

Wang

Kong

2022

Energy Science & Engineering

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High-speed water jets are key technologies for increased production efficiency in oil drilling, and high-speed self-excited oscillating pulsed water jets (SEOPWs) offer many advantages compared to continuous jets for most industrial applications. Therefore, many studies have focused on this topic.However, the current studies on hydraulic pulsed jets have rarely extended to integrated modeling of the high-speed water jet transmission process. To better apply the SEOPWs, based on fluid mechanics, the theoretical model of the plunger pump-pipeline-nozzle is established, and the sensitivity of different nozzles on the pulsating fluid is studied in the time domain.Furthermore, the vibration characteristics of the nozzle are further investigated in the frequency domain. The results show that the common nozzle has an enlarged role in the pressure amplitude, the Helmholtz nozzle enlarges the pressure peak and amplitude, and the amplification is more obvious with the speedy growth on the plunger pump. However, as the pipeline becomes longer, the difference between the pressure of the inlet and outlet does not change. Therefore, the nozzle is more sensitive to the change in the plunger pump speed. In the frequency domain, the secondary frequency peak for the Helmholtz nozzle is 1.26 times larger than the interference frequency, while it is 1.08 times for the common nozzle. Helmholtz nozzles tend to produce stronger natural vibrations than common nozzles. By comparing the impact force, the experimental results show good agreement with the simulated results. The study provides a theoretical basis for water jet-assisted drilling in deep wells and lays the foundation for the better application of self-oscillating impact drilling tools.

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Coal breakage using abrasive liquid nitrogen jet and its implications for coalbed methane recovery

Cited by 57 publications

References 55 publications

A Method of Quick and Safe Coal Uncovering by Hydraulic Fracturing in a Multibranch Radial Hole with a Coalbed Methane Well

A Method of Quick and Safe Coal Uncovering by Hydraulic Fracturing in a Multibranch Radial Hole with a Coalbed Methane Well

Advances in Liquid Nitrogen Fracturing for Unconventional Oil and Gas Development: A Review

Effects of pulsating fluid at nozzle inlet on the output characteristics of common and self‐excited oscillation nozzle

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