Hydraulic pulse cavitating jet generation device
A technology for generating devices and hydraulic pulses, which is applied in the direction of drilling with liquid/gas jets, etc. It can solve the problems of inability to guarantee the service life, difficult disassembly and replacement, and poor sealing condition, so as to facilitate disassembly, repair and replacement, and reduce manufacturing. cost, the effect of prolonging the service life
Active Publication Date: 2013-01-16
CHINA UNIV OF PETROLEUM (BEIJING) +2
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Problems solved by technology
In the extremely harsh downhole environment, and the sealing state is not good, the downhole mud will easily enter the hydraulic pulse cavitation jet drilling device, and the high-speed rotation of the impeller and the impeller shaft will generate a lot of heat, so it is easy to cause the wear of the impeller shaft. The lubrication of the impeller by drilling fluid alone cannot guarantee its service life
In addition, because in the drilling process, a large amount of mud will enter the hydraulic pulse cavitation jet drilling device in the known structure, causing the deflector, impeller assembly and oscillating nozzle and the main body to be stuck between the body. When the hydraulic pulse cavitation jet drilling device is taken out of the well for maintenance, it is very difficult to disassemble and replace the internal parts, resulting in the scrapping of the entire part, thereby increasing the cost of use
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[0041] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.
[0042] figure 1 It is a schematic diagram of the assembly of the hydraulic pulse cavitation jet device of the present invention; image 3 It is a schematic cross-sectional view of the body of the hydraulic pulse cavitation jet generating device of the present invention; Figure 4A It is a structural schematic diagram of the top pressure ring of the hydraulic pulse cavitation jet generating device of the present invention; Figure 4BA cross-sectional schematic diagram of the top pressure ring. As shown in the figure, the hydraulic pulse cavitation jet generating device proposed by the present invention includes: a hollow cylindrical body 1, one end of the body 1 is a fluid inlet section 11, and the other end is a fluid outlet se...
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The invention provides a hydraulic pulse cavitating jet generation device. The device comprises a hollow column body, wherein one end of the body is a fluid inlet section, the other end is a fluid outlet section, an accommodation cavity is formed between the fluid inlet section and the fluid outlet section, a baffle, an impeller assembly and a self-oscillation nozzle are orderly arranged in the accommodation cavity, one side of the accommodation cavity close to the fluid outlet section is provided with an annular flange, one surface of the flange facing towards the fluid inlet section forms apositioning end surface, and the self-oscillation nozzle can abut on and be positioned on the positioning end surface; and a top compression ring is arranged at one side close to the fluid inlet section of the body, and the accommodation cavity of the body is connected with and abuts on the baffle by threaded connection. By arranging seal washers in the hydraulic pulse cavitating jet generation device, the invention can improve the sealing effect, effectively prevents mud from flowing into the device, facilitates the maintenance and the replacement of internal parts, and simultaneously, further prolongs the service life of the impeller shaft.
Description
technical field [0001] The invention relates to a hydraulic pulse cavitation jet generating device for drilling operations, especially a hydraulic pulse cavitation jet that is easy to maintain and replace internal parts, has good lubrication and sealing performance, and can effectively improve the service life of the impeller shaft generating device. Background technique [0002] The hydraulic pulse cavitation jet drilling device is an important part of the hydraulic pulse cavitation jet drilling technology. When drilling, the device is installed between the drill bit and the drill collar, or between the drill bit and the downhole power drilling tool, and the drill collar or downhole power The continuous flow of drilling fluid flowing out of the drilling tool is transformed into a pulsed cavitation jet, which is injected to the bottom of the well through the drill bit nozzle, producing three effects of hydraulic pulse, cavitation cavitation, and instantaneous negative pressu...
Claims
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IPC IPC(8): E21B7/18
Inventor 李根生史怀忠申瑞臣何爱国牛继磊黄中伟田守嶒
Owner CHINA UNIV OF PETROLEUM (BEIJING)