CN112796723B - Pulse generating device - Google Patents
Pulse generating device Download PDFInfo
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- CN112796723B CN112796723B CN202011553725.5A CN202011553725A CN112796723B CN 112796723 B CN112796723 B CN 112796723B CN 202011553725 A CN202011553725 A CN 202011553725A CN 112796723 B CN112796723 B CN 112796723B
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- 239000012530 fluid Substances 0.000 claims abstract description 58
- 230000007246 mechanism Effects 0.000 claims abstract description 41
- 230000005540 biological transmission Effects 0.000 claims abstract description 39
- 238000005086 pumping Methods 0.000 claims abstract description 19
- 230000009286 beneficial effect Effects 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000004576 sand Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B28/00—Vibration generating arrangements for boreholes or wells, e.g. for stimulating production
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
The invention relates to a pulse generating device, comprising: the device comprises a tubular main cavity, wherein a fluid inlet is arranged on the main cavity; a transmission mechanism is arranged in the main cavity and is driven by fluid entering the main cavity; the transmission mechanism acts on the pressurizing chamber, and the volume of the pressurizing chamber is adjusted under the working state of the transmission mechanism; communicating the exterior of the main chamber with the interior of the plenum through the fluidic channel. The hydraulic wave booster is operated by the fluid driving transmission mechanism to adjust the volume of the pumping chamber, and the fluid in the pumping chamber is pressurized by reducing the volume of the pumping chamber so as to increase the amplitude of hydraulic waves.
Description
Technical Field
The invention relates to the technical field of hydraulic fracturing tools, in particular to a pulse generating device.
Background
Hydraulic fracturing is a well-stimulation measure with wide application prospect, which utilizes high-speed and high-pressure fluid carrying sand to carry out jet flow, and after a channel between a stratum and a well shaft is opened, the fluid discharge capacity is increased, so that a crack is opened in the stratum, the seepage condition of a low-permeability stratum is improved, and the stimulation and injection are realized.
The hydraulic fracturing device utilizes the self-oscillation nozzle to form pressure pulse or generates pressure pulse by changing the flow area, the amplitude and frequency characteristics of the generated hydraulic wave are greatly restricted, the effect is limited, and the application and popularization of the vibration oil extraction technology are limited.
Disclosure of Invention
The invention provides a pulse generating device, aiming at the technical problem of small amplitude of hydraulic wave in the prior art.
The technical scheme for solving the technical problems is as follows: a pulse generating device comprising:
a main tubular cavity;
the fluid inlet is arranged on the main cavity;
the transmission mechanism is arranged in the main cavity and driven by the fluid entering the main cavity;
the pressurizing chamber is arranged in the main cavity body and is communicated with the interior of the main cavity body, the transmission mechanism acts on the pressurizing chamber, and the volume of the pressurizing chamber is adjusted under the working state of the transmission mechanism;
and a fluidic channel for communicating the exterior of the main chamber with the interior of the plenum.
The invention has the beneficial effects that: the fluid drive transmission mechanism works to adjust the volume of the pressurizing chamber, and the fluid in the pressurizing chamber is pressurized by reducing the volume of the pressurizing chamber, so that the amplitude of the hydraulic wave is increased.
On the basis of the technical scheme, the invention can be improved as follows.
Further, the inside a room, the b room that arranges along main cavity axial in proper order that form of main cavity, fluid inlet and a room intercommunication, the inside arrangement of b room the plenum chamber, the lateral wall of main cavity is formed by the lateral wall concatenation of the lateral wall of a room, the lateral wall of b room.
The beneficial effect of adopting the above further scheme is: the assembly of the parts of the invention is facilitated.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the number of the pressurizing chambers is at least 2, and the pressurizing chambers are distributed along the circumferential direction of the main cavity body.
The beneficial effect of adopting the above further scheme is: a plurality of pressure pulse waves are generated along the circumference of the main cavity to increase the scope of the invention.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, a check valve is installed on the pressurizing chamber, and the fluid in the b chamber flows into the pressurizing chamber through the check valve.
The beneficial effect of adopting the further scheme is that: the backflow of fluid from the pumping chamber into the b-chamber is prevented by the check valve.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, a pipe shell is arranged inside the main cavity, a piston is arranged inside the pipe shell, the side wall of the main cavity, the pipe shell and the piston form the pressurizing chamber in an enclosing mode, the transmission mechanism comprises an eccentric assembly acting on the piston, and the piston moves inside the pipe shell under the working state of the transmission mechanism.
The beneficial effect of adopting the above further scheme is: the piston is pushed by the eccentric component to do reciprocating motion in the pipe shell, so that the volume of the pressurizing chamber is periodically adjusted.
On the basis of the technical scheme, the invention can be improved as follows.
Further, a buffer member is arranged in the pressurizing chamber and acts on the piston to buffer the impact of the fluid on the pressurizing chamber.
The beneficial effect of adopting the above further scheme is: the impact of the fluid on the pressurizing chamber is buffered through the buffer, and the service life of the pressurizing chamber is prolonged.
On the basis of the technical scheme, the invention can be improved as follows.
Furthermore, the transmission mechanism comprises a shaft part, blades are arranged on the shaft part, the shaft part is connected with the eccentric assembly, and the shaft part rotates to drive the eccentric assembly to rotate eccentrically when fluid acts on the blades.
The beneficial effect of adopting the above further scheme is: through the blades and the shaft part, the energy of the flowing working medium (namely fluid) is converted into rotary motion, and the structure is simple.
On the basis of the technical scheme, the invention can be improved as follows.
Further, the axial direction of the shaft member is kept consistent with the axial direction of the main cavity, and the blades are spirally arranged along the axial direction of the shaft member.
The beneficial effect of adopting the further scheme is that: in the field of hydraulic fracturing, the main chamber is relatively slender and the fracturing fluid used is a fluid carrying sand particles. The invention adopts the blades which are spirally arranged along the axial direction of the shaft piece, so that the blockage is not easy to occur and the stability is good.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the jet flow channel comprises a channel a and a channel b, the channel a is arranged on the side wall of the main cavity body, the channel b is arranged on the transmission mechanism, and in the working state of the transmission mechanism, the channel a and the channel b are switched between a first state and a second state, the channel a and the channel b are communicated, and the jet flow channel is opened; in the second state, the channels a and b are staggered, and the jet flow channel is closed.
The fluid entering the main cavity drives the transmission mechanism to circularly switch the jet flow channel between an open state and a closed state so as to generate water hammer type pressure pulse waves and obtain larger amplitude.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, drive mechanism includes the sleeve, and telescopic axial and the axial of the main cavity body keep unanimous and both normal running fit, and the b passageway is located on the sleeve, under the sleeve for the main cavity body rotation state, a, b passageway are periodic switching between state one and state two.
The beneficial effect of adopting the further scheme is that: a. the channel b is periodically switched between the first state and the second state, so that stable water hammer type pressure pulse wave amplitude is generated.
Drawings
FIG. 1 is a schematic perspective view of a pulse generator according to the present invention;
FIG. 2 isbase:Sub>A cross-sectional view taken at A-A of FIG. 1;
FIG. 3 is an enlarged schematic view at B of FIG. 2;
FIG. 4 is a schematic perspective view of the transmission mechanism of the present invention;
FIG. 5 is a schematic view showing the internal structure of the chamber b according to the present invention.
In the drawings, the reference numbers indicate the following list of parts:
1. a main chamber, 11, a chamber, 12, b chamber, 121, b1 side wall, 122, b2 side wall, 13, a cover, 2, a fluid inlet, 3, a transmission mechanism, 31, a shaft, 32, a blade, 33, an eccentric component, 331, a pressure rod, 332, a connecting rod, 34, a sleeve, 4, a pressurizing chamber, 41, a tube housing, 42, a piston, 5, a jet channel, 51, a channel, 511, a1 channel, 512, a2 channel, 52, b channel, 6, a check valve, 7, a buffer.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1 to 2, a pulse generating device includes: the device comprises a tubular main cavity 1, wherein a fluid inlet 2 is arranged on the main cavity 1; a transmission mechanism 3 is arranged in the main cavity 1, and the transmission mechanism 3 is driven by fluid entering the main cavity 1; the transmission mechanism 3 acts on the pressurizing chamber 4, and the volume of the pressurizing chamber 4 is adjusted when the transmission mechanism 3 is in a working state; the outside of the main chamber 1 communicates with the inside of the plenum chamber 4 through a fluidic channel 5.
The working steps of the pulse generating device in this embodiment are as follows: step one, the pulse generating device of the embodiment is lowered to a well section to be fractured along a drill rod. And step two, pressurizing the fracturing fluid by a pump and injecting the pressurized fracturing fluid into the main cavity 1 from the fluid inlet 2. Step three, the transmission mechanism 3 is driven to work through fracturing fluid, the volume of the pressurizing chamber 4 is increased in the stage a, and meanwhile, the fracturing fluid enters the pressurizing chamber 4; in the stage b, the volume of the pressurizing chamber 4 is reduced, when the volume of the pressurizing chamber 4 is compressed to a preset degree, the jet flow channel 5 is opened, and the fracturing fluid in the pressurizing chamber 4 is sprayed out from the jet flow channel 5 to form a pressure pulse wave to fracture the stratum. The embodiment realizes the pressurization of the fluid in the pressurizing chamber 4 by reducing the volume of the pressurizing chamber 4, thereby improving the action radius of the pressure pulse wave and obtaining better pulse effect.
In an embodiment of the present invention, an a chamber 11 and a b chamber 12 sequentially arranged along an axial direction of the main body 1 are formed inside the main body 1, a side wall of the a chamber 11 and a side wall of the b chamber 12 are spliced to form a side wall of the main body 1, and on this basis, a detachable cover 13 may be installed at an end of the b chamber 12 away from the a chamber 11, that is, the side wall of the b chamber 12 and the cover 13 may be detachably connected by a threaded connection. When assembling the parts of the embodiment, the transmission mechanism 3 is assembled with the side wall of the b chamber 12, then the side wall of the a chamber 11 is assembled with the side wall of the b chamber 12, and the side wall of the a chamber 11 and the side wall of the b chamber 12 can be detachably connected through a threaded connection mode. In the embodiment, the main cavity 1 is formed by splicing the side wall of the chamber a 11 and the side wall of the chamber b 12, so that the parts of the embodiment are convenient to assemble.
The fluid inlet 2 is communicated with the chamber a 11, the chamber b 12 is internally provided with the pressurizing chambers 4, the number of the pressurizing chambers 4 is several, in one embodiment of the invention, the number of the pressurizing chambers 4 is 2, and the pressurizing chambers are distributed along the circumference of the main cavity 1, specifically, the 2 pressurizing chambers 4 are distributed on the same diameter of the main cavity 1, and a plurality of pressure pulse waves in different directions are generated along the circumference of the main cavity 1 so as to enlarge the acting range of the invention on the stratum.
In order to ensure the pressurizing effect of the pressurizing chamber 4, in one embodiment of the present invention, a check valve 6 is installed on the pressurizing chamber 4, and referring to fig. 5, the fluid in the chamber 12 flows into the pressurizing chamber 4 through the check valve 6. The fracturing fluid enters the chamber b 12 through the chamber a, and under the action of the check valve 6, the fracturing fluid can only enter the pressurizing chamber 4 but cannot flow backwards, so that the pressure of the fracturing fluid in the pressurizing chamber 4 is ensured to be gradually increased.
The volume of the pressurizing chamber 4 is periodically adjusted, so that the a stage and the b stage can be alternated to continuously generate the pressure pulse wave. In one embodiment of the invention, a tube housing 41 is arranged inside the b chamber 12, a piston 42 is arranged inside the tube housing 41, the side wall of the b chamber 12, together with the tube housing 41 and the piston 42, encloses the pressurizing chamber 4, the transmission mechanism 3 comprises an eccentric assembly 33 acting on the piston 42, and the piston 42 moves inside the tube housing 41 in the operating state of the transmission mechanism 3. The present embodiment realizes the periodic adjustment of the volume of the pressurizing chamber 4 by the eccentric assembly 33 pushing the piston 42 to reciprocate in the tube housing 41.
In order to prolong the service life of the pressurizing chamber 4, in one embodiment of the present invention, a buffer member 7 is disposed inside the pressurizing chamber 4, the buffer member 7 acts on the piston 42, in this embodiment, the buffer member 7 is a spring, one end of the spring is fixed on the piston 42, the other end of the spring is fixed on a side wall of the pressurizing chamber 4, specifically, a side wall of the b chamber 12 includes a b1 side wall 121 and a b2 side wall 122 which are sequentially arranged from inside to outside, and the pressurizing chamber 4 is fixedly connected with one side wall of the spring, namely, the b1 side wall 121. When the pressure of the fracturing fluid in the b chamber 12 is suddenly increased, the spring contracts, the volume of the pressurizing chamber 4 is reduced, and the available space volume in the b chamber 12 (namely the space volume of the b chamber 12 minus the volume of the pressurizing chamber 4) is increased, so that the rising speed of the fluid pressure in the b chamber 12 is delayed, the impact of the fluid pressure on the pressurizing chamber 4 is reduced, and the service life of the pressurizing chamber 4 is prolonged. On this basis, the check valve 6 may be mounted on the piston 42.
Referring to fig. 2 to 4, in one embodiment of the present invention, the implementation of the transmission mechanism 3 includes: the transmission mechanism 3 comprises a shaft 31 and blades 32 fixedly connected with the shaft 31, and the shaft 31 and the blades 32 are fixedly connected in a welding manner; in this embodiment, the blades 32 and the shaft 31 convert the energy of the fluid (i.e., fluid) into a rotational motion, and the structure is simple. The turbine is a well-known rotary power machine for converting energy of a flowing working medium (i.e. fluid) into mechanical work, and it is easy to think that the turbine is installed in the main cavity 1. In the field of hydraulic fracturing, the main chamber 1 is elongated as a whole, and the fracturing fluid used is a fluid carrying sand particles; and the blades 32 of the turbine are densely arranged along the circumferential direction of the turbine, so that the gap between the turbine and the side wall of the main cavity 1 is very limited, and the fracturing fluid is easy to block through the gap between the turbine and the main cavity 1. In order to solve this problem, in one embodiment of the present invention, the axial direction of the shaft 31 is kept consistent with the axial direction of the main cavity 1, and the blades 32 are spirally arranged along the axial direction of the shaft 31; the blade 32 is located in the chamber a, and during the process that the fracturing fluid flows from the chamber a 11 to the chamber b 12, the fracturing fluid acts on the blade 32, and the blade 32 drives the shaft 31 to rotate. The blades 32 spirally arranged along the axial direction of the shaft 31 are adopted in the embodiment, so that the pulse generating device is not easy to block, and has good stability when in operation.
The shaft member 31 is connected to the eccentric assembly 33, and the eccentric assembly 33 is driven to rotate eccentrically by the shaft member 31. On this basis, the realization mode of the eccentric mechanism comprises the following steps: the eccentric assembly 33 comprises a pressing rod 331, the center of the pressing rod 331 is fixedly connected with one end of a connecting rod 332, the other end of the connecting rod 332 is fixedly connected with one end of the shaft 31, the center of the pressing rod 331 deviates from the axis of the shaft 31, and the outer edge of the pressing rod 331 is used for abutting against the piston 42. The shaft 31 drives the pressing rod 331 to eccentrically rotate through the connecting rod, and the pressing rod 331 abuts against the piston 42, so that the piston tube moves inside the housing 41 to change the size of the internal volume of the pressurizing chamber 4.
In one embodiment of the present invention, the fluidic channel 5 includes an a channel 51 and a b channel 52, the a channel 51 is disposed on the sidewall of the main cavity 1, the b channel 52 is disposed on the transmission mechanism 3, and in the working state of the transmission mechanism 3, the a channel 51 and the b channel 52 are switched between a first state and a second state, the a channel 51 and the b channel 52 are communicated, and the fluidic channel 5 is opened; in the second state, the a-channel 51 and the b-channel 52 are staggered, and the fluidic channel 5 is closed. In this embodiment, the fracturing fluid drives the transmission mechanism 3 to work, so that the jet flow channel 5 is circularly switched between the open state and the closed state, when the jet flow channel 5 is opened and closed, the fluid speed is suddenly changed, a water hammer type pressure pulse wave is generated in the fluid, and the amplitude of the water hammer type pressure pulse wave is larger than that of other pressure pulse waves, wherein the other pressure waves refer to pressure pulse waves formed by a self-oscillation nozzle and pressure pulse waves generated by changing the flow area.
In order to generate stable water hammer type pressure pulse wave amplitude, in one embodiment of the present invention, the transmission mechanism 3 comprises a sleeve 34, the axial direction of the sleeve 34 is consistent with the axial direction of the main cavity 1 and the sleeve is rotationally matched with the main cavity, specifically, one end of the shaft 31 located in the b chamber is fixedly connected with the sleeve 34 through a support frame, and the shaft 31 is coaxial with the sleeve 34; the b channel 52 is provided on the sleeve 34, where 1 b channel 52 is provided on the sleeve 34 and the a channel 51 opens on the side wall of the b chamber 12. Under the condition that the fracturing fluid acts on the blade 32, the blade 32 drives the shaft 31 to rotate, the shaft 31 drives the sleeve 34 to rotate relative to the main cavity 1, and the channel a 51 and the channel b 52 are periodically switched between the first state and the second state.
Referring to fig. 3 and 5, on the basis of the above embodiment, the side wall of the b-chamber 12 includes a b1 side wall 121 and a b2 side wall 122 arranged from inside to outside, the a-channel 51 includes a1 channel 511 and a2 channel 512, the a1 channel 511 is disposed on the b1 side wall 121, the a2 channel 512 is disposed on the b2 side wall 122, and the sleeve 34 is disposed between the b1 side wall 121 and the b2 side wall 122, and adjacent two are in surface contact. a. When the b channel 52 is staggered, staggered sealing is formed between the sleeve 34 and the b1 side wall 121 and the b2 side wall 122, the sealing is reliable, and the pressurization effect in the pressurization chamber 4 is good.
The number of the channels (52) b on the sleeve (34) is 1, and the channels (51) a on the side wall of the chamber (12) are in a plurality of groups, and each group of the channels (51) a is communicated with one pressurizing chamber (4). In one embodiment of the invention, the a channels 51 are in 2 groups and are distributed on the same diameter of the main cavity 1. Referring to fig. 2 to 3, in the present embodiment, the fracturing fluid acts on the vane 32 to rotate the shaft 31, the eccentric assembly 33 and the sleeve 34 are respectively driven to rotate by the shaft, when the pressure rod 331 of the eccentric assembly 33 abuts against the piston 42 in one of the pumping chambers 4 and the volume of the pumping chamber 4 (see the pumping chamber 4 on the left side of fig. 2) reaches the minimum, the channel a 51 corresponding to the pumping chamber 4 (see the pumping chamber 4 on the left side of fig. 2) is communicated with the channel b 52 on the sleeve 34, and at this time, the jet channel 5 corresponding to the pumping chamber 4 (see the pumping chamber 4 on the left side of fig. 2) is opened, the fracturing fluid in the pumping chamber 4 (see the pumping chamber 4 on the left side of fig. 2) is ejected through the jet channel 5 to fracture the formation; at the same time, the volume of the other pumping chamber 4 (see pumping chamber 4 on the right in fig. 2) is maximized, and the a-channel 51 corresponding to the pumping chamber 4 (see pumping chamber 4 on the right in fig. 2) is offset from the b-channel 52 on the sleeve 34.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, which is intended to cover any modifications, equivalents, improvements, etc. within the spirit and scope of the present invention.
Claims (7)
1. An impulse generating device, comprising:
a main tubular cavity;
a fluid inlet disposed on the main chamber;
the transmission mechanism is arranged in the main cavity and driven by the fluid entering the main cavity; the transmission mechanism comprises an eccentric assembly acting on the piston, and under the working state of the transmission mechanism, the piston moves in the pipe shell; the transmission mechanism comprises a shaft part, blades are arranged on the shaft part, the shaft part is connected with the eccentric assembly, and the shaft part rotates to drive the eccentric assembly to eccentrically rotate when fluid acts on the blades; the eccentric assembly comprises a pressure lever and a connecting rod, the center of the pressure lever is fixedly connected with one end of the connecting rod, the other end of the connecting rod is fixedly connected with one end of the shaft part, the center of the pressure lever deviates from the axis of the shaft part, and the outer edge of the pressure lever is used for abutting against the piston;
the pressurizing chamber is arranged in the main cavity body and is communicated with the interior of the main cavity body, the transmission mechanism acts on the pressurizing chamber, and the volume of the pressurizing chamber is adjusted under the working state of the transmission mechanism;
a fluidic channel for communicating the exterior of the main chamber with the interior of the plenum;
the transmission mechanism further comprises a sleeve, the axial direction of the sleeve is consistent with the axial direction of the main cavity body, the axial direction of the sleeve and the axial direction of the main cavity body are in running fit, the jet flow channel comprises a channel a and a channel b, the channel b is arranged on the sleeve, and under the rotating state of the sleeve relative to the main cavity body, the channel a and the channel b are periodically switched between a first state and a second state.
2. The pulse generating device as claimed in claim 1, wherein the main chamber body has a chamber a and a chamber b arranged in sequence along the axial direction of the main chamber body, the fluid inlet is communicated with the chamber a, the chamber b is internally provided with the pressurizing chamber, and the side wall of the main chamber body is formed by splicing the side wall of the chamber a and the side wall of the chamber b.
3. The pulse generating device as claimed in claim 1, wherein the number of the pressurizing chambers is at least 2, and the pressurizing chambers are distributed along the circumferential direction of the main chamber.
4. The pulse generating device as claimed in claim 1, wherein the pressurizing chamber is provided with a check valve, and the fluid in the b chamber flows into the pressurizing chamber through the check valve.
5. The pulse generating device of claim 1, wherein a buffer is disposed within the pumping chamber to buffer an impact of the fluid on the pumping chamber, the buffer acting on the piston.
6. An impulse generating device according to claim 1, characterized in that the axial direction of said shaft member is kept in conformity with the axial direction of the main chamber, and the vanes are arranged spirally along the axial direction of the shaft member.
7. The pulse generating device according to claim 1, wherein the a channel is disposed on a side wall of the main cavity, the b channel is disposed on the transmission mechanism, and in the working state of the transmission mechanism, the a channel and the b channel are switched between a first state and a second state, the a channel and the b channel are communicated, and the jet channel is open; in the second state, the channels a and b are staggered, and the jet flow channel is closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011553725.5A CN112796723B (en) | 2020-12-24 | 2020-12-24 | Pulse generating device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011553725.5A CN112796723B (en) | 2020-12-24 | 2020-12-24 | Pulse generating device |
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| CN112796723A CN112796723A (en) | 2021-05-14 |
| CN112796723B true CN112796723B (en) | 2023-01-31 |
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| CN109113567A (en) * | 2018-10-29 | 2019-01-01 | 长江大学 | A kind of hydraulic booster liquid jet instrument |
| CN110306931A (en) * | 2019-06-03 | 2019-10-08 | 中国石油集团渤海钻探工程有限公司 | A kind of hydraulic impacter of helical runner driving |
| CN112031726A (en) * | 2020-08-31 | 2020-12-04 | 长江大学 | Turbine drive circumference sliding sleeve formula pulse generation instrument |
| CN214303801U (en) * | 2020-12-24 | 2021-09-28 | 长江大学 | Pulse generating tool |
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