CN2685528Y - Underground high pressure hydraulic pulse generator - Google Patents
Underground high pressure hydraulic pulse generator Download PDFInfo
- Publication number
- CN2685528Y CN2685528Y CN 200420038848 CN200420038848U CN2685528Y CN 2685528 Y CN2685528 Y CN 2685528Y CN 200420038848 CN200420038848 CN 200420038848 CN 200420038848 U CN200420038848 U CN 200420038848U CN 2685528 Y CN2685528 Y CN 2685528Y
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- piston
- guiding valve
- spring
- sliding valve
- pressure
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Abstract
The utility model discloses an underground high pressure hydraulic pulse generator, comprising a converting connector, an upper positioning ring for sliding valve, a sliding valve, a sliding valve spring, a lower positioning ring for sliding valve, a sliding valve cylinder sleeve, a piston cylinder sleeve, a piston, a piston spring, a spring frame, a pressure increasing cylinder, a shell and a high-pressure spraying tube. The pressure increasing cylinder, the spring frame, the piston spring, the piston cylinder sleeve, the piston, the sliding valve cylinder sleeve, the lower positioning ring for sliding valve, the sliding valve spring, the sliding valve and the upper positioning ring for sliding valve are orderly arranged in the inner part of the shell from bottom to top. The upper end of the shell is connected with the converting connector, and the lower end of the shell is connected with a drill head. The outlet of the lower end of the pressure increasing cylinder is connected with the high-pressure spraying tube, and the high-pressure spraying tube is inserted into the inner part of the drill head and directly inserted to the well bottom. The sliding valve and the piston are moved to and fro under the combined action of the surge pressure, the inertial force and the elastic force of the spring. A periodic pressure increasing pulse and a negative pressure pulse are formed at the well bottom, the 'chip hold down effect' of the detritus is reduced, the clean-up effect of the well bottom is strengthened, and the efficiencies of the jet rock-breaking drilling and the auxiliary rock-breaking drilling are improved.
Description
Technical field
The utility model belongs to the corollary apparatus of oil, gas drilling.
Technical background
The broken rock drilling efficiency that how effectively to improve deep formation is a problem that presses for solution in the current domestic and international drilling engineering, significantly increase the jet velocity of bottom jet, the auxiliary rock effect of fortified water jet, even to utilize the direct fractured rock of water jet be an effective way that significantly improves the broken rock drilling efficiency of deep formation.By significantly increasing the feasibility that ground pump power and capacity of equipment increase bottom jet speed by practice negated, with proper method, obtaining higher broken rock drilling efficiency in the shaft bottom by the pressure that significantly increases very little a part of fluid is the most feasible present a kind of method.But current techniques adopts the method for the broken rock of solid jet, require fluid pressure to reach about 200Mpa, this has proposed high requirement to capacity of equipment, make device structure be tending towards complicated, manufacturing cost rises, the stability of a system descends, and this also is why this imagination proposes the existing quite a while, but slowly fails to realize the main cause of industrial applications.Rock breaking by water jet mechanism is discovered, the relative solid jet of thresholding pressure of the broken rock of pulsing jet is much lower, and under the identical situation of rock breaking efficiency, required jet quality also will be lacked, this points out us, if adopt the mode of supercharging pulsation to improve deep formation jet efficiency of breaking rock, can significantly reduce the working strength of equipment in the shaft bottom, thereby create conditions down in existing industry, can effectively improve operation stability of equipment, make in the creeping into of deep-well, ultradeep well, stablely comprehensively improve rate of penetration and become possibility.
Summary of the invention
The utility model is just for solving prior art means complex structure, system reliability is low, be difficult to effectively improve current deep-well, ultradeep well drilling machinery drilling speed designs, its principle is to utilize the low characteristic of thresholding pressure of the broken rock of pulsing jet, the simplified structure design, the stability of raising system and compliance, by significantly increasing the hydraulic pulse peak value in shaft bottom, produce local decompression simultaneously again in the shaft bottom, strengthen the bottom hole flushing effect, effectively improve the broken rock of jet, the efficient that auxiliary rock creeps into, the purpose of this utility model are exactly to provide a kind of a kind of down-hole high pressure hydraulic pulse generator that is suitable for more for the scene.
The utility model is achieved like this, it is by crossover sub, guiding valve upper limit back-up ring, guiding valve, slide valve spring, guiding valve lower limit back-up ring, the guiding valve cylinder sleeve, piston-cylinder, piston, piston spring, spring support, pressurized cylinder, housing and high-pressure nozzle are formed, the housing lower end links to each other with drill bit, the housing upper end links to each other with drill string by crossover sub, pressurized cylinder is contained in the enclosure interior lower end, the outer rim of pressurized cylinder is processed with runner, spring support is contained in the pressurized cylinder upper end, the spring support middle part is processed with through hole, be processed with runner around the axle center of spring support, piston spring seat placed in the middle is put in the spring support upper end, be processed with runner around the axle center of piston, piston is fitted in the piston-cylinder, the enclosure interior of packing into together, the lower surface of piston-cylinder and spring support upper surface join, the small end of piston stretches in the piston spring, pass the through hole at spring support center, join then and insert in the pressurized cylinder, guiding valve cylinder sleeve inner chamber is processed into the little shape of entrance point large outlet end, guiding valve lower limit back-up ring and slide valve spring are packed in the guiding valve cylinder sleeve, guiding valve is fitted in the guiding valve cylinder sleeve, and the small end of guiding valve inserts in the slide valve spring, and the guiding valve center is processed with runner, the plug of the outlet of the runner at guiding valve center and piston upper end joins, the guiding valve upper limit back-up ring of packing in the upper end of guiding valve cylinder sleeve links to each other crossover sub with housing, the lower surface of crossover sub and guiding valve upper limit back-up ring join, the lower end outlet of pressurized cylinder is connected with high-pressure nozzle, high-pressure nozzle stretches into drill bit internal, and drilling fluid enters guiding valve inside through crossover sub, because the plug of piston upper end is closed the runner at guiding valve center, so drilling fluid promotes guiding valve, piston is descending with certain speed, while compression piston spring and slide valve spring, behind the descending certain distance, guiding valve is blocked by guiding valve cylinder sleeve internal spool valve lower limit back-up ring, piston then continues descending under inertia and drilling liquid pressure synergy, at this moment the plug of piston upper end and guiding valve lower end break away from, and the runner at guiding valve center is opened, and the drilling liquid pressure that acts on the guiding valve upper end descends, guiding valve is up under the effect of slide valve spring elastic force, connect up to bumping with guiding valve lower limit back-up ring, descent of piston is to certain position, after the kinetic energy of piston all is converted into the elastic potential energy of spring, piston is then up under the effect of piston spring elastic force, plug on piston and guiding valve bump to connect closes the guiding valve runner, and the high speed drilling fluid produces positive water attack because of blocking-up, at the very big pressure of epicoele formation of guiding valve, the guiding valve cavity of resorption can not be descending because of top liquid stream simultaneously, and original drilling fluid continues to flow downward, and pressure sharply reduces, promptly when epicoele produces positive water attack, cavity of resorption produces negative water attack, the pressure differential of upper and lower cavity promotes guiding valve and piston moves downward, and behind the descending certain distance, guiding valve is blocked by the guiding valve lower limit back-up ring in the guiding valve cylinder sleeve, piston then continues descending under inertia force and drilling liquid pressure synergy, at this moment the plug of piston upper end and guiding valve lower end break away from, and the runner at guiding valve center is opened, and the drilling liquid pressure that acts on the guiding valve upper end descends, guiding valve is up under the effect of slide valve spring elastic force, connect up to bumping with guiding valve upper limit back-up ring, descent of piston is to certain position, after the kinetic energy of piston all is converted into the elastic potential energy of spring, piston is up under the effect of piston spring elastic force, make the plug of piston upper end bump and connect, again the runner at guiding valve center is closed, again at the upper and lower cavity formation surge pressure of guiding valve with guiding valve, the pressure differential of upper and lower cavity promotes guiding valve and piston moves downward, so go round and begin again, by the pressure reduction Displacement Feedback of piston and guiding valve, guiding valve and piston are at surge pressure, the comprehensive function of inertia force and spring power moves back and forth down, in the piston stroking upward process, form negative pressure in the pressurized cylinder, with the drilling fluid in shaft bottom in high-pressure nozzle sucks pressurized cylinder, because the suction of high-pressure nozzle jet pipe, part in the shaft bottom near the high-pressure nozzle outlet produces negative pressure, be the low value of hydraulic pulse, in the process of guiding valve and descent of piston, the drilling fluid in the piston lower end extruding pressurized cylinder, because the upper surface area of guiding valve is the several times of pressurized cylinder intracavity section area, known that by pascal's principle the interior drilling fluid of pressurized cylinder this moment is owing to push, its pressure significantly improves rapidly, spray to the shaft bottom to be several times as much as the descending pressure of promotion guiding valve at a high speed through high-pressure nozzle, form the high value of hydraulic pulse, periodic hydraulic booster pulsation in shaft bottom and negative pressure pulsation help landwaste and overcome " chip hold down effect ", impel landwaste to start and new catalase face exposure, strengthen the clean-up effect in shaft bottom, improve near the force-bearing situation of the rock in shaft bottom, improve the efficient that mechanical rock breaking is crept into, the peak value of hydraulic pulse and frequency are by adjusting the rigidity of piston spring and slide valve spring, the stroke of piston, the weight of piston and guiding valve, the sectional dimension of guiding valve and booster cavity and the outlet diameter of high-pressure nozzle wait and obtain.
The utility model creatively utilizes the relative solid jet of thresholding pressure of the broken rock of pulsing jet much lower, and under the identical situation of rock breaking efficiency, required jet quality is wanted little characteristic, by form high amplitude in the shaft bottom, the shaft bottom hydraulic pulse of peak value, be periodic supercharging pulsation and negative pressure pulsation, reduce " chip hold down effect " of shaft bottom landwaste, strengthen the bottom hole flushing effect, improve the broken rock of jet, the efficient that auxiliary rock creeps into, the utlity model has simple in structure, use easy to operate, safe and reliable, characteristics such as wide adaptability are for improving deep-well, the rate of penetration of ultradeep well drilling well has very important practical significance.
Description of drawings
A kind of down-hole high pressure hydraulic pulse generator of Fig. 1
1. crossover sub; 2. guiding valve upper limit back-up ring; 3. guiding valve; 4. slide valve spring; 5. guiding valve lower limit back-up ring; 6. guiding valve cylinder sleeve; 7. piston-cylinder; 8. piston; 9. piston spring; 10. spring support; 11. pressurized cylinder; 12. housing; 13. high-pressure nozzle
The specific embodiment
Now the utility model will be further described in conjunction with Figure of description.
When adopting the utility model to produce hydraulic pulse, the housing lower end links to each other with drill bit, the housing upper end links to each other with drill string by crossover sub, pressurized cylinder is contained in the enclosure interior lower end, the outer rim of pressurized cylinder is processed with runner, spring support is contained in the pressurized cylinder upper end, the spring support middle part is processed with through hole, be processed with runner around the axle center of spring support, piston spring seat placed in the middle is put in the spring support upper end, be processed with runner around the axle center of piston, piston is fitted in the piston-cylinder, the enclosure interior of packing into together, the lower surface of piston-cylinder and spring support upper surface join, the small end of piston stretches in the piston spring, pass the through hole at spring support center, join then and insert in the pressurized cylinder, guiding valve cylinder sleeve inner chamber is processed into the little shape of entrance point large outlet end, guiding valve lower limit back-up ring and slide valve spring are packed in the guiding valve cylinder sleeve, guiding valve is fitted in the guiding valve cylinder sleeve, the small end of guiding valve inserts in the slide valve spring, the guiding valve center is processed with runner, the plug of the outlet of the runner at guiding valve center and piston upper end joins, the guiding valve upper limit back-up ring of packing in the upper end of guiding valve cylinder sleeve links to each other crossover sub with housing, the lower surface of crossover sub and guiding valve upper limit back-up ring join, the lower end outlet of pressurized cylinder is connected with high-pressure nozzle, and high-pressure nozzle stretches into drill bit internal.
When adopting the utility model to produce hydraulic pulse, drilling fluid enters guiding valve inside through crossover sub, because the plug of piston upper end is closed the runner at guiding valve center, so drilling fluid promotes guiding valve, piston is descending with certain speed, while compression piston spring and slide valve spring, behind the descending certain distance, guiding valve is blocked by guiding valve cylinder sleeve internal spool valve lower limit back-up ring, piston then continues descending under inertia and drilling liquid pressure synergy, at this moment the plug of piston upper end and guiding valve lower end break away from, the runner at guiding valve center is opened, the drilling liquid pressure that acts on the guiding valve upper end descends, guiding valve is up under the effect of slide valve spring elastic force, connect up to bumping with guiding valve lower limit back-up ring, descent of piston is to certain position, after the kinetic energy of piston all is converted into the elastic potential energy of spring, piston is then up under the effect of piston spring elastic force, plug on piston and guiding valve bump to connect closes the guiding valve runner, the high speed drilling fluid produces positive water attack because of blocking-up, epicoele at guiding valve forms very big pressure, the guiding valve cavity of resorption can not be descending because of top liquid stream simultaneously, and original drilling fluid continues to flow downward, pressure sharply reduces, promptly when epicoele produces positive water attack, cavity of resorption produces negative water attack, the pressure differential of upper and lower cavity promotes guiding valve and piston moves downward, behind the descending certain distance, guiding valve is blocked by the guiding valve lower limit back-up ring in the guiding valve cylinder sleeve, piston then continues descending under inertia force and drilling liquid pressure synergy, at this moment the plug of piston upper end and guiding valve lower end break away from, the runner at guiding valve center is opened, the drilling liquid pressure that acts on the guiding valve upper end descends, guiding valve is up under the effect of slide valve spring elastic force, connect up to bumping with guiding valve upper limit back-up ring, descent of piston is to certain position, after the kinetic energy of piston all is converted into the elastic potential energy of spring, piston is up under the effect of piston spring elastic force, making the plug of piston upper end and guiding valve bump connects, again the runner at guiding valve center is closed, upper and lower cavity at guiding valve forms surge pressure again, and the pressure differential of upper and lower cavity promotes guiding valve and piston moves downward, and so goes round and begins again, pressure reduction Displacement Feedback by piston and guiding valve, guiding valve and piston are at surge pressure, the comprehensive function of inertia force and spring power moves back and forth down, in the piston stroking upward process, forms negative pressure in the pressurized cylinder, with the drilling fluid in shaft bottom in high-pressure nozzle sucks pressurized cylinder, because the suction of high-pressure nozzle jet pipe, the part in the shaft bottom near the high-pressure nozzle outlet produces negative pressure, the i.e. low value of hydraulic pulse, in the process of guiding valve and descent of piston, drilling fluid in the piston lower end extruding pressurized cylinder because the upper surface area of guiding valve is the several times of pressurized cylinder intracavity section area, is known by pascal's principle, the interior drilling fluid of pressurized cylinder this moment is because extruding, its pressure significantly improves rapidly, sprays to the shaft bottom to be several times as much as the descending pressure of promotion guiding valve at a high speed through high-pressure nozzle, forms the high value of hydraulic pulse, periodic hydraulic booster pulsation in shaft bottom and negative pressure pulsation help landwaste and overcome " chip hold down effect ", impel landwaste to start and new catalase face exposure, strengthen the clean-up effect in shaft bottom, improve near the force-bearing situation of the rock in shaft bottom, improve the efficient that mechanical rock breaking is crept into, the peak value of hydraulic pulse and frequency are by adjusting the rigidity of piston spring and slide valve spring, the stroke of piston, the weight of piston and guiding valve, the sectional dimension of guiding valve and booster cavity and the outlet diameter of high-pressure nozzle wait and obtain.
Claims (2)
1. a down-hole high pressure hydraulic pulse generator is characterized in that housing [12] lower end links to each other with drill bit, housing [12] upper end links to each other with drill string by crossover sub [1], pressurized cylinder [11] is contained in housing [12] interior lower end, the outer rim of pressurized cylinder [11] is processed with runner, spring support [10] is contained in pressurized cylinder [11] upper end, spring support [10] middle part is processed with through hole, be processed with runner around the axle center of spring support [10], piston spring [9] seat placed in the middle is put in spring support [10] upper end, be processed with runner around the axle center of piston [8], piston [8] is fitted in the piston-cylinder [7], housing [12] inside of packing into together, the lower surface of piston-cylinder [7] and spring support [10] upper surface join, the small end of piston [8] stretches in the piston spring [9], pass the through hole at spring support [10] center, join then and insert in the pressurized cylinder [11], guiding valve cylinder sleeve [6] inner chamber is processed into the little shape of entrance point large outlet end, guiding valve lower limit back-up ring [5] and slide valve spring [4] are packed in the guiding valve cylinder sleeve [6], in the equipped guiding valve cylinder sleeve [6] of guiding valve [3], the small end of guiding valve [3] inserts in the slide valve spring [4], guiding valve [3] center is processed with runner, the plug of the outlet of the runner at guiding valve [3] center and piston [8] upper end joins, the guiding valve upper limit back-up ring [2] of packing in the upper end of guiding valve cylinder sleeve [6], crossover sub [1] is linked to each other with housing [12], the lower surface of crossover sub [1] and guiding valve upper limit back-up ring [2] join, the lower end outlet of pressurized cylinder [11] is connected with high-pressure nozzle [13], and high-pressure nozzle [13] stretches into drill bit internal.
2. a kind of down-hole high pressure hydraulic pulse generator according to claim 1 is characterized in that guiding valve [3] and guiding valve cylinder sleeve [6], pressurized cylinder [11] and piston [8] adopt the connection that is sealed and matched.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420038848 CN2685528Y (en) | 2004-03-09 | 2004-03-09 | Underground high pressure hydraulic pulse generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420038848 CN2685528Y (en) | 2004-03-09 | 2004-03-09 | Underground high pressure hydraulic pulse generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2685528Y true CN2685528Y (en) | 2005-03-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420038848 Expired - Fee Related CN2685528Y (en) | 2004-03-09 | 2004-03-09 | Underground high pressure hydraulic pulse generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2685528Y (en) |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101077598B (en) * | 2007-06-18 | 2011-11-09 | 李衍远 | Method for preparing flat-plate stone using rock crackle forming continuous spreading fracture |
| CN102330539A (en) * | 2011-10-12 | 2012-01-25 | 西南石油大学 | Pulsed jet underground flow self-improving device for petroleum and natural gas drilling |
| CN102410939A (en) * | 2011-12-06 | 2012-04-11 | 西北工业大学 | Hydraulic pulse excitation device for structural dynamic characteristic test research |
| CN102536121A (en) * | 2012-02-08 | 2012-07-04 | 中国石油大学(北京) | Pulse type underground pressurization jet flow drilling method and device |
| CN103422826A (en) * | 2013-08-08 | 2013-12-04 | 中国地质大学（武汉） | Multipurpose water pulse device used in well |
| CN103802223A (en) * | 2014-01-20 | 2014-05-21 | 李衍远 | Method for making rock cracks grow and fracture through alternating tensile stress to manufacture slab stone |
| WO2016090209A3 (en) * | 2014-12-05 | 2016-07-21 | AOI (Advanced Oilfield Innovations, Inc.) | Down-hole vibrational oscillator |
| CN107152265A (en) * | 2017-07-14 | 2017-09-12 | 西安石油大学 | The ultrasonic generation system of low permeability reservoir augmented injection underground low-frequency hydraulic pulse coupling waterpower |
| CN108331924A (en) * | 2016-03-28 | 2018-07-27 | 广东普洛测控科技有限公司 | A kind of downhole pulser control valve of low remanent magnetism |
| CN109441354A (en) * | 2018-12-22 | 2019-03-08 | 西南石油大学 | A kind of pulsating cyclic shock wave auxiliary rock device |
| CN109469476A (en) * | 2018-10-29 | 2019-03-15 | 中国石油集团渤海钻探工程有限公司 | Measurement while-drilling instrument pore throat drilling fluid pulse generator |
| CN109930998A (en) * | 2019-05-07 | 2019-06-25 | 刘伟 | A kind of PDC drill bit rock crushing tool |
| CN112049572A (en) * | 2019-06-05 | 2020-12-08 | 中石化石油工程技术服务有限公司 | Hydraulic pulser and hydraulic oscillator |
| CN115095309A (en) * | 2022-07-26 | 2022-09-23 | 山东科技大学 | Differential pressure type piston supercharging energy storage pulse device |
| CN115126466A (en) * | 2022-08-09 | 2022-09-30 | 山东科技大学 | Inertia pressure-accumulation amplitude-rising type pulse device |
| CN117108205A (en) * | 2023-10-20 | 2023-11-24 | 四川派盛通石油工程技术有限公司 | Pulse type supercharging jet drilling device |
-
2004
- 2004-03-09 CN CN 200420038848 patent/CN2685528Y/en not_active Expired - Fee Related
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101077598B (en) * | 2007-06-18 | 2011-11-09 | 李衍远 | Method for preparing flat-plate stone using rock crackle forming continuous spreading fracture |
| CN102330539A (en) * | 2011-10-12 | 2012-01-25 | 西南石油大学 | Pulsed jet underground flow self-improving device for petroleum and natural gas drilling |
| CN102410939A (en) * | 2011-12-06 | 2012-04-11 | 西北工业大学 | Hydraulic pulse excitation device for structural dynamic characteristic test research |
| CN102410939B (en) * | 2011-12-06 | 2014-02-26 | 西北工业大学 | Hydraulic pulse excitation device for experimental investigation on dynamic characteristics of structure |
| US9115541B2 (en) | 2012-02-08 | 2015-08-25 | China University Of Petroleum-Beijing (Cupb) | Impulse-type underground supercharged jet drilling method and device |
| CN102536121A (en) * | 2012-02-08 | 2012-07-04 | 中国石油大学(北京) | Pulse type underground pressurization jet flow drilling method and device |
| CN103422826A (en) * | 2013-08-08 | 2013-12-04 | 中国地质大学（武汉） | Multipurpose water pulse device used in well |
| CN103422826B (en) * | 2013-08-08 | 2015-10-14 | 中国地质大学（武汉） | A kind of multiplex WIH power pulser |
| CN103802223A (en) * | 2014-01-20 | 2014-05-21 | 李衍远 | Method for making rock cracks grow and fracture through alternating tensile stress to manufacture slab stone |
| WO2016090209A3 (en) * | 2014-12-05 | 2016-07-21 | AOI (Advanced Oilfield Innovations, Inc.) | Down-hole vibrational oscillator |
| CN108331924A (en) * | 2016-03-28 | 2018-07-27 | 广东普洛测控科技有限公司 | A kind of downhole pulser control valve of low remanent magnetism |
| CN108331924B (en) * | 2016-03-28 | 2020-04-14 | 广东普洛测控科技有限公司 | Low-remanence underground pulse generator control valve |
| CN107152265A (en) * | 2017-07-14 | 2017-09-12 | 西安石油大学 | The ultrasonic generation system of low permeability reservoir augmented injection underground low-frequency hydraulic pulse coupling waterpower |
| CN107152265B (en) * | 2017-07-14 | 2023-03-17 | 西安石油大学 | Low-frequency hydraulic pulsation coupling hydraulic ultrasonic generating system for injection enhancement of low-permeability reservoir |
| CN109469476B (en) * | 2018-10-29 | 2022-04-19 | 中国石油集团渤海钻探工程有限公司 | Throat type drilling fluid pulse generator for measurement while drilling instrument |
| CN109469476A (en) * | 2018-10-29 | 2019-03-15 | 中国石油集团渤海钻探工程有限公司 | Measurement while-drilling instrument pore throat drilling fluid pulse generator |
| CN109441354A (en) * | 2018-12-22 | 2019-03-08 | 西南石油大学 | A kind of pulsating cyclic shock wave auxiliary rock device |
| CN109930998A (en) * | 2019-05-07 | 2019-06-25 | 刘伟 | A kind of PDC drill bit rock crushing tool |
| CN112049572A (en) * | 2019-06-05 | 2020-12-08 | 中石化石油工程技术服务有限公司 | Hydraulic pulser and hydraulic oscillator |
| CN115095309A (en) * | 2022-07-26 | 2022-09-23 | 山东科技大学 | Differential pressure type piston supercharging energy storage pulse device |
| CN115095309B (en) * | 2022-07-26 | 2023-07-25 | 山东科技大学 | Pressure difference type piston boosting energy storage pulse device |
| CN115126466A (en) * | 2022-08-09 | 2022-09-30 | 山东科技大学 | Inertia pressure-accumulation amplitude-rising type pulse device |
| CN115126466B (en) * | 2022-08-09 | 2024-02-02 | 山东科技大学 | Inertial pressure accumulation amplitude-rising type pulse device |
| CN117108205A (en) * | 2023-10-20 | 2023-11-24 | 四川派盛通石油工程技术有限公司 | Pulse type supercharging jet drilling device |
| CN117108205B (en) * | 2023-10-20 | 2024-01-23 | 四川派盛通石油工程技术有限公司 | Pulse type supercharging jet drilling device |
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| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |