CN115126466B - Inertial pressure accumulation amplitude-rising type pulse device - Google Patents
Inertial pressure accumulation amplitude-rising type pulse device Download PDFInfo
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- CN115126466B CN115126466B CN202210949894.3A CN202210949894A CN115126466B CN 115126466 B CN115126466 B CN 115126466B CN 202210949894 A CN202210949894 A CN 202210949894A CN 115126466 B CN115126466 B CN 115126466B
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- 238000009825 accumulation Methods 0.000 title claims abstract description 20
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 83
- 230000001965 increasing effect Effects 0.000 claims abstract description 29
- 239000012530 fluid Substances 0.000 claims description 38
- 239000007788 liquid Substances 0.000 claims description 35
- 230000003068 static effect Effects 0.000 claims description 18
- 239000000956 alloy Substances 0.000 claims description 8
- 229910045601 alloy Inorganic materials 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 4
- 230000009286 beneficial effect Effects 0.000 claims description 2
- 230000000630 rising effect Effects 0.000 claims 7
- 230000035699 permeability Effects 0.000 abstract description 8
- 230000000903 blocking effect Effects 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000007921 spray Substances 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002596 correlated effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000035485 pulse pressure Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
Abstract
The invention belongs to the technical field of hydraulic fracturing permeability increasing equipment, and relates to an inertial pressure accumulation amplitude-increasing pulse device, which comprises an inlet, a shell, an upstream inertial wheel set, an upstream elastic cavity, a shutoff wheel, a downstream elastic cavity, a downstream inertial wheel set and an outlet, wherein the inlet is connected with the shell through the upstream inertial wheel set; the middle part of the shell is provided with a cutoff wheel, one side of the cutoff wheel is communicated with an upstream inertia wheel set, an upstream elastic cavity is arranged between the cutoff wheel and the upstream inertia wheel set, and the input end of the upstream inertia wheel set is communicated with the inlet; the other side of the cutoff wheel is communicated with a downstream inertia wheel set, a downstream elastic cavity is arranged between the cutoff wheel and the downstream inertia wheel set, and the output end of the downstream inertia wheel set is communicated with the outlet; the device can store and release the flow energy through the inertia energy of the upstream and downstream inertia wheel sets, obviously increases the pressure fluctuation amplitude, enlarges the action range of the hydraulic pulse, and improves the joint making, blocking removing and permeability increasing capabilities of the hydraulic pulse.
Description
Technical field:
the invention belongs to the technical field of hydraulic fracturing and permeability increasing equipment for coal mines and oil and gas fields, relates to a device for increasing hydraulic pulse amplitude through inertial energy of a metal impeller, and in particular relates to an inertial pressure accumulation amplitude-increasing type pulse device which can improve hydraulic fracturing and permeability increasing effects under the condition that a pump pressure is unchanged.
The background technology is as follows:
the hydraulic pulse can effectively improve the hydraulic fracturing and permeability increasing effects through fatigue damage, cavitation damage, fluctuation reflection superposition, reduction of pore permeation resistance and the like, and is an effective technology widely applied to coal bed fracturing, permeability increasing and oil and gas field fracturing and plugging removal.
In the prior art, chinese patent with publication number of CN2685528 discloses an underground high-pressure hydraulic pulse generator, which consists of an adapter, a slide valve upper limit retainer ring, a slide valve spring, a slide valve lower limit retainer ring, a slide valve cylinder sleeve, a piston spring, a spring support, a booster cylinder, a shell and a high-pressure spray pipe, wherein the booster cylinder, the spring support, the piston spring, the piston cylinder sleeve, the slide valve lower limit retainer ring, the slide valve spring, the slide valve and the slide valve upper limit retainer ring are sequentially arranged in the shell from bottom to top, the upper end of the shell is connected with the adapter, the lower end of the shell is connected with a drill bit, the outlet of the lower end of the booster cylinder is connected with the high-pressure spray pipe, the high-pressure spray pipe stretches into the drill bit, the well bottom is directly inserted, and the slide valve and the piston reciprocate under the combined action of water hammer pressure, inertia force and spring elastic force. The Chinese patent with publication number CN104929605B discloses a downhole hydraulic pulse staged fracturing permeation increasing device and method, wherein the device comprises a downhole pulse fracturing device, a controllable hydraulic packer, a continuous oil pipe, a fluid control valve and a fracturing truck; the fracturing truck is connected with a controllable hydraulic packer and an underground pulse fracturing device through a continuous oil pipe, the controllable hydraulic packer is connected to the rear end of the underground pulse fracturing device, and a fluid control valve is arranged at the joint of the continuous oil pipe; the underground pulse fracturing device comprises a first cylinder body, a second cylinder body, a mandrel, a sliding sleeve, a sealing ring, a spring, a nozzle and the like.
The hydraulic pulse can be generated by a surface pulse pump and a bottom hole pulse tool, and the bottom hole pulse tool is a main direction of the development of the hydraulic pulse because the energy loss is large when the pulse energy of the surface pulse pump is transmitted to the bottom of a borehole. Typical pulse tools at the bottom of the well are represented by impeller shutoff pulse tools and self-oscillation pulse tools, but the impeller shutoff pulse tools and the self-oscillation pulse tools have the problem of smaller pulse amplitude. Because the pulse energy is positively correlated with the amplitude of the pressure fluctuation, the application effect of the conventional bottom hole pulse tool in fracturing and permeability increasing is limited.
The invention comprises the following steps:
the invention aims to overcome the defects of the prior art, and designs an inertial pressure accumulation amplitude-increasing type pulse device, aiming at the defects of large pulse energy loss, small pulse amplitude of a bottom hole pulse tool, limited application effect and the like of the prior ground pulse pump, and by utilizing the inertia of a hard alloy wheel set, the flow energy is efficiently stored and released, the pressure fluctuation amplitude of impeller interception is greatly increased, and more excellent hydraulic fracturing and permeability increasing effects are realized
In order to achieve the aim, the invention relates to an inertial pressure accumulation amplitude-rising type pulse device, which mainly comprises an inlet, a shell, an upstream inertial wheel set, an upstream elastic cavity, a shutoff wheel, a downstream elastic cavity, a downstream inertial wheel set and an outlet, wherein the inlet is arranged on the shell; the middle part of the shell is provided with a cutoff wheel, one side of the cutoff wheel is communicated with an upstream inertia wheel set, an upstream elastic cavity is arranged between the cutoff wheel and the upstream inertia wheel set, and the input end of the upstream inertia wheel set is communicated with the inlet; the other side of the cutoff wheel is communicated with a downstream inertia wheel set, a downstream elastic cavity is arranged between the cutoff wheel and the downstream inertia wheel set, and the output end of the downstream inertia wheel set is communicated with the outlet.
The shell is of a tubular structure, the front part of the shell is provided with an inlet, and the inlet consists of a front straight tubular pipe orifice and a speed increasing part of a rear conical structure; the speed increasing portion of the inlet is capable of converting a low-speed fluid into a high-speed fluid.
The rear end of the speed increasing part of the inlet is communicated with the front end of an upstream liquid pipe, an upstream inertia wheel set is arranged on the upstream liquid pipe, the lower part of the upstream inertia wheel set is positioned in a pipe cavity of the upstream liquid pipe, the upper side of the rear part of the upstream liquid pipe is connected with an upstream elastic cavity, and the rear end of the upstream liquid pipe is communicated with the lower part of the front side of the shutoff wheel.
The middle part of the rear side of the shutoff wheel is communicated with the front end of a connecting pipe, the rear end of the connecting pipe is communicated with the front end of an inclined pipe, the inclined pipe is inclined downwards from front to back, and the upper part of the rear end of the inclined pipe is communicated with the lower end of a downstream elastic cavity; the rear end of the inclined tube is also communicated with the front end of the downstream liquid tube, a downstream inertia wheel set is arranged on the downstream liquid tube, the lower part of the downstream inertia wheel set is positioned in the tube cavity of the downstream liquid tube, the rear part of the downstream liquid tube is communicated with the front end of an outlet, and the outlet and the inlet are identical in structure and are symmetrically arranged.
The downstream elastic cavity is of a right trapezoid structure, the bevel edge shell of the downstream elastic cavity is parallel to the inclined tube, the lower bottom cavity of the downstream elastic cavity is communicated with the upper part of the rear end of the inclined tube, and the arrangement structure of the downstream elastic cavity is beneficial to outflow of fluid and reduction of static pressure energy.
The upstream inertia wheel set and the downstream inertia wheel set are respectively composed of 3-10 hard alloy impellers, and the impellers can rotate along with high-speed fluid in an upstream liquid pipe or a downstream liquid pipe to store part of kinetic energy of the fluid in a rotation inertia energy mode; the volumes of the upstream elastic cavity and the downstream elastic cavity are 5L-10L respectively, the upstream elastic cavity can store inertial energy released by the upstream inertial wheel set through fluid elasticity, and the downstream elastic cavity can buffer the inertial energy released by the downstream inertial wheel set through fluid elasticity; the shutoff wheel can rotate along with the fluid to realize the opening and closing of the flow channel, and the opening and closing of the shutoff wheel are controlled in a wired or wireless mode so as to realize the flow change and pressure fluctuation of the upstream and downstream of the shutoff wheel.
The invention relates to a method for realizing hydraulic pulse by an inertial pressure accumulation amplitude-rising type pulse device, which comprises the following specific steps:
(1) The inlet is connected with a hydraulic booster pump, and the inlet generates high-speed fluid after the booster pump is started;
(2) When the flow channel is opened by the cutoff wheel, the hard alloy impellers of the upstream inertia wheel set and the downstream inertia wheel set rotate at high speed along with the fluid, and the kinetic energy of the high-speed fluid is stored as the rotation inertia energy of the inertia wheel set;
(3) When the flow channel is closed by the shutoff wheel, the static pressure energy of the upstream elastic cavity can be increased by the inertia energy of the upstream inertia wheel set, and the static pressure energy of the downstream elastic cavity can be reduced by the inertia energy of the downstream inertia wheel set;
(4) When the shutoff wheel opens the runner again, the static pressure energy of the upstream elastic cavity is increased while the static pressure energy of the downstream elastic cavity is reduced, and a large static pressure difference and an instantaneous high flow rate are generated before and after the shutoff wheel, so that the flow rate and the pressure fluctuation amplitude of the outlet are increased.
Compared with the prior art, the designed inertial pressure accumulation amplitude-increasing pulse device has reasonable main structure, and can increase the pressure fluctuation amplitude by more than 20 times of the pumping pressure through the storage and release of the flow energy by the inertial energy of the upstream and downstream inertial wheel sets, thereby expanding the action range of the hydraulic pulse and improving the joint making, blocking removing and permeation increasing capabilities of the hydraulic pulse.
Description of the drawings:
fig. 1 is a schematic structural diagram of an inertial pressure accumulation amplitude-rising pulse device according to the present invention.
The specific embodiment is as follows:
the invention is further illustrated by the following examples in conjunction with the accompanying drawings.
Example 1:
as shown in fig. 1, the main structure of the inertial pressure accumulation amplitude-rising type pulse device comprises an inlet 1, a shell 2, an upstream inertial wheel set 3, an upstream elastic cavity 4, a shutoff wheel 5, a downstream elastic cavity 6, a downstream inertial wheel set 7, an outlet 8, an upstream liquid pipe 9, a connecting pipe 10, an inclined pipe 11 and a downstream liquid pipe 12; wherein, the front part of the shell 2 with a tubular structure is provided with an inlet 1, and the inlet 1 consists of a front straight tubular pipe orifice and a speed increasing part with a rear conical structure; the speed increasing part of the inlet 1 can convert low-speed fluid into high-speed fluid; the rear end of the speed increasing part of the inlet 1 is communicated with the front end of an upstream liquid pipe 9, the upstream liquid pipe 9 is provided with an upstream inertia wheel set 3, the lower part of the upstream inertia wheel set 3 is positioned in a pipe cavity of the upstream liquid pipe 9, the upper side of the rear part of the upstream liquid pipe 9 is connected with an upstream elastic cavity 4, the rear end of the upstream liquid pipe 9 is communicated with the lower part of the front side of a shutoff wheel 5, the middle part of the rear side of the shutoff wheel 5 is communicated with the front end of a connecting pipe 10, the rear end of the connecting pipe 10 is communicated with the front end of an inclined pipe 11, the inclined pipe 11 is inclined downwards from front to back, the upper part of the rear end of the inclined pipe 11 is communicated with the lower end of a downstream elastic cavity 6, the hypotenuse shell of the downstream elastic cavity 6 is parallel to the inclined pipe 11, the lower bottom cavity part of the downstream elastic cavity 6 is communicated with the upper part of the rear end of the inclined pipe 11, and the arrangement structure of the downstream elastic cavity 6 is favorable for outflow of fluid and static pressure energy reduction; the rear end of the inclined tube 11 is also communicated with the front end of the downstream liquid tube 12, the downstream liquid tube 12 is provided with a downstream inertia wheel set 7, the lower part of the downstream inertia wheel set 7 is positioned in the tube cavity of the downstream liquid tube 12, the rear part of the downstream liquid tube 12 is communicated with the front end of the outlet 8, and the outlet 8 and the inlet 1 are identical in structure and are symmetrically arranged.
The upstream inertia wheel set 3 and the downstream inertia wheel set 7 related to the embodiment are respectively composed of 3-10 hard alloy impellers, and the impellers can rotate along with high-speed fluid in an upstream liquid pipe 9 or a downstream liquid pipe 12, so that part of kinetic energy of the fluid is stored in a rotation inertia energy mode; the volumes of the upstream elastic cavity 4 and the downstream elastic cavity 6 are 5L-10L respectively, the upstream elastic cavity 4 can store inertial energy released by the upstream inertial wheel set 3 through fluid elasticity, and the downstream elastic cavity 6 can buffer the inertial energy released by the downstream inertial wheel set 7 through fluid elasticity; the shutoff wheel 5 can rotate along with the fluid to realize the opening and closing of the flow channel, and the opening and closing of the shutoff wheel 5 are controlled in a wired or wireless mode so as to realize the flow change and pressure fluctuation of the upstream and downstream of the shutoff wheel 5.
The method for realizing hydraulic pulse by the inertial pressure accumulation amplitude-rising type pulse device comprises the following specific steps:
(1) The inlet 1 is connected with a hydraulic booster pump, and after the booster pump is started, high-speed fluid is generated at the inlet 1;
(2) When the shutoff wheel 5 opens the flow channel, the hard alloy impellers of the upstream inertia wheel set 3 and the downstream inertia wheel set 7 rotate at high speed along with the fluid, and the kinetic energy of the high-speed fluid is stored as the rotation inertia energy of the inertia wheel set;
(3) When the shutoff wheel 5 closes the flow passage, the inertia energy of the upstream inertia wheel set 3 can increase the static pressure energy of the upstream elastic cavity 4, and the inertia energy of the downstream inertia wheel set 7 can reduce the static pressure energy of the downstream elastic cavity 6;
(4) When the shutoff wheel 5 opens the flow passage again, since the static pressure energy of the upstream elastic chamber 4 is increased while the static pressure energy of the downstream elastic chamber 6 is reduced, a large static pressure difference and an instantaneous high flow rate are generated before and after the shutoff wheel 5, thereby increasing the flow rate and the pressure fluctuation amplitude of the outlet 8.
The working principle of the inertial pressure accumulation amplitude-rising pulse device related to the embodiment is as follows:
the density of the hard alloy is 15 times of that of water, and the inertia wheel set has more than 10 times of that of water at the same speed; when the shutoff wheel 5 opens the flow channel, the upstream inertia wheel set 3 and the downstream inertia wheel set 7 accelerate and rotate along with the fluid flow, and the fluid flow energy is converted into impeller inertia energy; when the shutoff wheel 5 closes the flow passage, the inertia energy of the inertia impeller set is more than 10 times of that of water, so that the upstream inertia wheel set 3 can increase the upstream pressure of the shutoff wheel 5 by more than 10 times of that of the pump pressure, and the downstream inertia wheel set 7 can reduce the downstream pressure of the shutoff wheel 5 by less than 1/10 of that of the pump pressure; when the cutoff wheel 5 opens the flow channel, the inertial energy of the upstream inertial wheel set 3 and the downstream inertial wheel set 7 is converted into pulse pressure energy upstream and downstream of the cutoff wheel 5, and is propagated to the outlet 8 along with the fluid flow.
Claims (7)
1. An inertial pressure accumulation rising amplitude pulse device is characterized in that: the device comprises an inlet, a shell, an upstream inertia wheel set, an upstream elastic cavity, a shutoff wheel, a downstream elastic cavity, a downstream inertia wheel set and an outlet; the middle part of the shell is provided with a cutoff wheel, one side of the cutoff wheel is communicated with an upstream inertia wheel set, an upstream elastic cavity is arranged between the cutoff wheel and the upstream inertia wheel set, and the input end of the upstream inertia wheel set is communicated with the inlet; the other side of the cutoff wheel is communicated with a downstream inertia wheel set, a downstream elastic cavity is arranged between the cutoff wheel and the downstream inertia wheel set, and the output end of the downstream inertia wheel set is communicated with the outlet; the upstream inertia wheel set and the downstream inertia wheel set are composed of 3-10 hard alloy impellers, and the impellers can rotate along with high-speed fluid in an upstream liquid pipe or a downstream liquid pipe to store part of kinetic energy of the fluid in a way of rotating inertia energy; the volumes of the upstream elastic cavity and the downstream elastic cavity are 5L-10L, the upstream elastic cavity can store inertial energy released by the upstream inertial wheel set through fluid elasticity, and the downstream elastic cavity can buffer the inertial energy released by the downstream inertial wheel set through fluid elasticity; the shutoff wheel can rotate along with the fluid to realize the opening and closing of the flow channel, the flow channel is opened after the shutoff wheel is opened, and the flow channel is closed after the shutoff wheel is closed, so that the flow variation and the pressure fluctuation of the upstream and the downstream of the shutoff wheel are realized.
2. An inertial pressure accumulation amplitude rising pulse device as claimed in claim 1 characterised in that: the shell is of a tubular structure, an inlet is formed in the front of the shell, and the inlet consists of a front straight tubular pipe orifice and a speed increasing part of a rear conical structure; the speed increasing portion of the inlet is capable of converting a low-speed fluid into a high-speed fluid.
3. An inertial pressure accumulation amplitude rising pulse device as claimed in claim 2 characterised in that: the rear end of the speed increasing part of the inlet is communicated with the front end of an upstream liquid pipe, an upstream inertia wheel set is installed on the upstream liquid pipe, the lower part of the upstream inertia wheel set is positioned in a pipe cavity of the upstream liquid pipe, the upper side of the rear part of the upstream liquid pipe is connected with an upstream elastic cavity, and the rear end of the upstream liquid pipe is communicated with the lower part of the front side of the shutoff wheel.
4. An inertial pressure accumulation amplitude rising pulse device as claimed in claim 3 characterised in that: the middle part of the rear side of the shutoff wheel is communicated with the front end of a connecting pipe, the rear end of the connecting pipe is communicated with the front end of an inclined pipe, the inclined pipe is inclined downwards from front to back, and the upper part of the rear end of the inclined pipe is communicated with the lower end of a downstream elastic cavity; the rear end of the inclined tube is also communicated with the front end of the downstream liquid tube, a downstream inertia wheel set is arranged on the downstream liquid tube, the lower part of the downstream inertia wheel set is positioned in the tube cavity of the downstream liquid tube, the rear part of the downstream liquid tube is communicated with the front end of an outlet, and the outlet and the inlet are identical in structure and are symmetrically arranged.
5. The inertial pressure accumulation amplitude rising pulse device as in claim 4 wherein: the downstream elastic cavity is of a right trapezoid structure, the bevel edge shell of the downstream elastic cavity is parallel to the inclined tube, the lower bottom cavity of the downstream elastic cavity is communicated with the upper portion of the rear end of the inclined tube, and the arrangement structure of the downstream elastic cavity is beneficial to outflow of fluid and reduction of static pressure energy.
6. The inertial pressure accumulation amplitude rising pulse device as in claim 5 wherein: the opening and closing of the shutoff wheel is controlled in a wired or wireless mode.
7. The inertial pressure accumulation amplitude rising pulse device as in claim 6 wherein: the method for realizing the hydraulic pulse by the inertial pressure accumulation amplitude-rising type pulse device comprises the following specific steps:
(1) The inlet is connected with a hydraulic booster pump, and the inlet generates high-speed fluid after the booster pump is started;
(2) When the flow channel is opened by the cutoff wheel, the hard alloy impellers of the upstream inertia wheel set and the downstream inertia wheel set rotate at high speed along with the fluid, and the kinetic energy of the high-speed fluid is stored as the rotation inertia energy of the inertia wheel set;
(3) When the flow channel is closed by the shutoff wheel, the static pressure energy of the upstream elastic cavity can be increased by the inertia energy of the upstream inertia wheel set, and the static pressure energy of the downstream elastic cavity can be reduced by the inertia energy of the downstream inertia wheel set;
(4) When the shutoff wheel opens the runner again, the static pressure energy of the upstream elastic cavity is increased while the static pressure energy of the downstream elastic cavity is reduced, and a large static pressure difference and an instantaneous high flow rate are generated before and after the shutoff wheel, so that the flow rate and the pressure fluctuation amplitude of the outlet are increased.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210949894.3A CN115126466B (en) | 2022-08-09 | 2022-08-09 | Inertial pressure accumulation amplitude-rising type pulse device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210949894.3A CN115126466B (en) | 2022-08-09 | 2022-08-09 | Inertial pressure accumulation amplitude-rising type pulse device |
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| Publication Number | Publication Date |
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| CN115126466A CN115126466A (en) | 2022-09-30 |
| CN115126466B true CN115126466B (en) | 2024-02-02 |
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| CN202210949894.3A Active CN115126466B (en) | 2022-08-09 | 2022-08-09 | Inertial pressure accumulation amplitude-rising type pulse device |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2685528Y (en) * | 2004-03-09 | 2005-03-16 | 中国石化集团胜利石油管理局钻井工艺研究院 | Underground high pressure hydraulic pulse generator |
| CN201125722Y (en) * | 2007-12-24 | 2008-10-01 | 中国石化集团胜利石油管理局钻井工艺研究院 | Downhole pressure pulsed jet solution tools |
| CN104929605A (en) * | 2015-06-26 | 2015-09-23 | 重庆地质矿产研究院 | Underground hydraulic pulse staged fracturing and permeability increasing device and method |
| CN110821454A (en) * | 2019-11-29 | 2020-02-21 | 中国石油大学(华东) | Downhole pulse generating device driven by oil pipe transmission and injection method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3134609A1 (en) * | 2014-04-24 | 2017-03-01 | Anders, Edward, O. | Apparatus, systems, and methods for fracturing a geological formation |
-
2022
- 2022-08-09 CN CN202210949894.3A patent/CN115126466B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2685528Y (en) * | 2004-03-09 | 2005-03-16 | 中国石化集团胜利石油管理局钻井工艺研究院 | Underground high pressure hydraulic pulse generator |
| CN201125722Y (en) * | 2007-12-24 | 2008-10-01 | 中国石化集团胜利石油管理局钻井工艺研究院 | Downhole pressure pulsed jet solution tools |
| CN104929605A (en) * | 2015-06-26 | 2015-09-23 | 重庆地质矿产研究院 | Underground hydraulic pulse staged fracturing and permeability increasing device and method |
| CN110821454A (en) * | 2019-11-29 | 2020-02-21 | 中国石油大学(华东) | Downhole pulse generating device driven by oil pipe transmission and injection method |
Non-Patent Citations (2)
| Title |
|---|
| 多级脉冲高能气体压裂裂缝动态扩展分析;孙志宇等;《西南石油大学学报(自然科学版)》;第32卷(第6期);全文 * |
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