Results 31 to 40 of about 522 (199)
Particle jet impact deep-rock in rotary drilling: Failure process and lab experiment.
PLoS ONE, 2021 Aimed at the technical problems of low drilling speed and difficult rock-breaking in deep-well and hard rock-stratum, particle waterjet coupled impact rock-breaking technology in rotary drilling is put forward in this paper.
Tiancheng Fang +4 more
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Hydraulic extension ability of radial jet drilling with multi-nozzles jet bit
IOP Conference Series: Earth and Environmental Science, 2020 Abstract Radial jet drilling technology, which utilizes hydraulic energy of jet to create multiple radial micro-laterals in different layers from the main borehole, has been used widely as an effective approach to enhance the oil recovery, and the extreme extension length of radial micro-laterals affects the effect of simulation directly.
Dawei Qin +3 more
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Research on Dynamic Index of Coal Seams Area Based on Water Jet Slotting
Meikuang Anquan, 2020 Based on the water jet slotting coal seam permeability increase technology, the stress distribution state of the coal after slotting is analyzed, and the radial and tangential stresses of the slotted borehole are calculated.
LIU Jian, JIANG Wenzhong, REN Zhongjiu, LIU Ziwen
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A technical review of radial jet drilling [PDF]
Journal of Petroleum and Gas Engineering, 2017 Radial jet drilling (RJD) is an unconventional drilling technique that uses the jet energy of high velocity fluids to drill laterals with different geometries in both conventional and unconventional reservoirs. Many case studies available worldwide have proven RJD as a viable alternative to traditional stimulation techniques, especially in marginal ...
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Study on the rock‐breaking effect of water jets generated by self‐rotatory multinozzle drilling bit
Energy Science & Engineering, 2020 Underground radial drilling technique is a novel hydraulic stimulation technology, which is one of the important ways to realize precise, intelligent, and efficient extraction of the gas resources.
Yanbao Liu +4 more
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Flow Field Simulation of Swirling Abrasive Jet Nozzle for Hard Rock Breaking
Geofluids, 2022 Radial jet drilling (RJD) technology has been proved to be an economical and efficient stimulation technology for oil and gas, geothermal, hydrate, etc. but conventional RJD technology adopts pure water jet to break rock and form laterals, which has low ...
Zhang Dongqing +4 more
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Research on the Step Drilling System for Water Jet Radial Drilling
Shiyou jixie, 2021 The low traction force of the front-end nozzle for water jet radial drilling limits the drilling distance. The ground run drilling method has complex force transmission, large run-in-hole fluctuation, and has difficulty in the ground precise control of ...
Chen Zhi +5 more
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Drilling Performance of Self-propelled Straight-Rotary Mixing Nozzle
Shiyou jixie, 2022 In order to improve the application results of hydraulic radial drilling technology in hydrate exploitation and reservoir stimulation,numerical simulation method was used to study the drilling performance of self-propelled nozzle,which is the core ...
Gao Junhong, Fu Biwei, Dong Zongzheng
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D3.2 Report on radial jet-drilling (RJD) stimulation technology
, 2016 Radial water jet drilling uses the power of a focused uid jet, which is capable of drilling multiple laterals of about 100 m length out of an existing well and thereby stimulating the well with full control on the operational parameters like initial direction of the lateral, length, uid pressure etc.
Blöcher, G. +5 more
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Shiyou jixie, 2021 The hydraulic jet radial drilling technology is the optimal technology for connecting fractures and vuggs in ultra-depth carbonate reservoirs of the Tahe Oilfield. The existing “nozzle + hose” hydraulic jet radial drilling technology is difficult to meet
Zhang Jie +6 more
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