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11. 发明授权

US10837271B2 Method and device for conducting explosive-fracturing 有权
$Method and device for conducting explosive-fracturing$
公开(公告)号：US10837271B2
公开(公告)日：2020-11-17
申请号：US16382048
申请日：2019-04-11
申请人： Bo Qu
发明人： Bo Qu
IPC分类号： E21B43/263 , E21B34/10
CPC分类号： E21B43/263 , E21B34/10
摘要： A downhole sub for injecting and detonating liquid explosive into a subterranean formation has a first fluid chamber, a second fluid chamber, a piston slidably disposed between and separates the first fluid chamber and the second fluid chamber, and a detonation unit affixed to the piston. It also has a third fluid chamber, a coupling disposed between the second fluid chamber and the third fluid chamber, and an annular sealing device disposed about the downhole sub. During operation, the downhole sub is filled with a liquid explosive and lowered into a well. A hydraulic fluid is injected into the downhole sub to initiate a process in which a portion of the well casing having a plurality of perforations in its wall is isolated from the rest of the well first, the liquid explosive is then injected into the isolated portion, and from there into the surrounding subterranean formation, and finally ignited to create fractures in the formation.

12. 发明授权

US08154266B2 Bi-directional DC power circuit 有权
标题翻译：双向直流电源电路
公开(公告)号：US08154266B2
公开(公告)日：2012-04-10
申请号：US12343845
申请日：2008-12-24
申请人： YiFei Zhao , Bo Qu
发明人： YiFei Zhao , Bo Qu
IPC分类号： G05F1/40
CPC分类号： H02M3/1582
摘要： Bi-directional direct current (DC) power circuit having: a signal processing module for processing feedbacks of output voltage and voltage drop, and outputting pulse control and directional control signals; a pulse width modulation (PWM) module for outputting pulse signals in response to the control signals from the signal processing module; and a switch rectifying module for switching on and off in response to the pulse signals from the PWM module. The pulse control signal from the signal processing module can be in response to an input current signal from a sense resistor. The circuit is capable of achieving both step-up and step-down voltage conversions.
摘要翻译：具有：用于处理输出电压和电压降的反馈的信号处理模块，以及输出脉冲控制和方向控制信号的双向直流（DC）电源电路; 脉冲宽度调制（PWM）模块，用于响应于来自信号处理模块的控制信号输出脉冲信号; 以及用于响应于来自PWM模块的脉冲信号而导通和截止的开关整流模块。来自信号处理模块的脉冲控制信号可以响应于来自检测电阻器的输入电流信号。该电路能够实现升压和降压电压转换。

13. 发明授权

US11473414B2 Method and device for conducting explosive-fracturing 有权
$Method and device for conducting explosive-fracturing$
公开(公告)号：US11473414B2
公开(公告)日：2022-10-18
申请号：US17164017
申请日：2021-02-01
申请人： Bo Qu
发明人： Bo Qu
IPC分类号： E21B33/128 , E21B23/04 , E21B23/06 , E21B43/263 , E21B34/10
摘要： A downhole sub has a cylindrical body and a sealing device disposed about the cylindrical body. The cylindrical body has a first fluid chamber configured to store a hydraulic fluid, a second fluid chamber configured to store a liquid energetic material, a piston slidably disposed between the first fluid chamber and the second fluid chamber, and an ignition unit. The sealing device has two annular pistons and two annular sealing rings. The sub is loaded with the liquid energetic material and lowered into a well casing installed in the subterranean formation. A section of the well casing having a plurality of perforations is sealed. The liquid energetic material in the downhole sub is injected into the subterranean formation through the plurality of perforations in the well casing and is detonated using the ignition unit in the downhole sub.

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