CN113187455A - Pulse continuous jet flow hot melting combustible ice mining tool - Google Patents
Pulse continuous jet flow hot melting combustible ice mining tool Download PDFInfo
- Publication number
- CN113187455A CN113187455A CN202110593130.0A CN202110593130A CN113187455A CN 113187455 A CN113187455 A CN 113187455A CN 202110593130 A CN202110593130 A CN 202110593130A CN 113187455 A CN113187455 A CN 113187455A
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- combustible ice
- disc
- liquid flow
- pulse
- shower nozzle
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- 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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
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- 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
Abstract
The invention relates to a pulse continuous jet flow hot melting combustible ice mining tool, which belongs to the technical field of combustible ice mining equipment. Under the condition that the input flow is unchanged, the tool can improve the flow velocity of jet flow and greatly improve the transient kinetic energy of the jet flow by rotating the valve disc and the spray head, is more favorable for impacting a broken combustible ice reservoir, further improves the exploitation speed of the combustible ice and reduces the consumption of exploitation energy.
Description
Technical Field
The invention relates to a pulse continuous jet flow hot melting combustible ice mining tool, and belongs to the technical field of combustible ice mining equipment.
Background
Under the urgent situation that energy is in shortage, combustible ice gradually enters the visual field of people. According to estimation, the total resource amount of organic carbon contained in the combustible ice in the world is twice of that of coal, petroleum and natural gas known worldwide, the energy demand of human for thousands of years can be met, and the combustible ice is a well-known strategic new resource. Therefore, how to safely, quickly and effectively mine combustible ice is the biggest difficulty in mining combustible ice at present, but because of being limited by objective conditions, the scale development of combustible ice development and utilization still has more obstacles.
The conventional combustible ice mining methods include a heat injection method, a depressurization method, a chemical reagent injection method and the like, wherein the heat injection method is divided into direct hot water injection, hot jet, hot steam injection and the like, the current hot jet mining has a weak crushing effect on a combustible ice reservoir, and meanwhile, the hot jet has low decomposition rate and low thermal efficiency on the combustible ice and high mining energy consumption, so that the improvement is needed.
Disclosure of Invention
The invention aims to: the pulse continuous jet flow hot melting combustible ice mining tool is capable of improving the heat energy utilization rate of mining heat flow, reducing mining energy consumption and improving the combustible ice mining rate.
The technical scheme of the invention is as follows:
the utility model provides a continuous efflux hot melt combustible ice exploitation instrument of pulse, includes casing, top connection, lower casing, screw rotor, stator and pulse mechanism, its characterized in that: go up casing one end screw thread and install the top connection, go up casing other end screw thread and install down the casing, go up and be provided with the stator on the shells inner wall, the inside eccentric form cover of stator is equipped with screw rotor, the inside end cap that is equipped with of last casing above the screw rotor, the internal pulse mechanism that is provided with of inferior valve of screw rotor below, pulse mechanism and screw rotor are connected.
Pulse mechanism include transmission shaft, liquid flow dish, spacing sleeve, bearing, upper end cover, lower end cover, shower nozzle and rotation valve disc, the port under the casing is installed to the shower nozzle screw thread, the liquid flow dish is equipped with through spacing sleeve in the lower casing of shower nozzle top, be equipped with the transmission shaft through the bearing on the liquid flow dish, the transmission shaft top is connected with the screw rotor through universal joint, the transmission shaft bottom extends to liquid flow dish below, the transmission shaft end that extends to liquid flow dish below is equipped with the rotation valve disc, the rotation valve disc is connected with the shower nozzle contact.
The limiting sleeve is respectively connected with the spray head and the liquid flow disc in an abutting mode.
The liquid flow disc is disc-shaped, the central part of the liquid flow disc is provided with an assembly hole, and liquid flow holes are uniformly distributed on the liquid flow disc at the periphery of the assembly hole.
The lower end cover is installed in the lower port of the assembly hole through threads, and the upper end cover is arranged on the upper port of the assembly hole.
And a spring is arranged on a transmission shaft between the rotary valve disc and the liquid flow disc, and two ends of the spring are respectively in contact connection with the rotary valve disc and the liquid flow disc.
The shower nozzle be the drop form, the shower nozzle upper end is provided with the assembly concave, is provided with the external screw thread on the concave shower nozzle circumference that corresponds of assembly, assembly concave bottom central part position is provided with shower nozzle central through-hole, the concave bottom of the outlying assembly of shower nozzle central through-hole is provided with a plurality of shower nozzle side openings.
The rotary valve disc is disc-shaped, a mounting hole is formed in the middle of the rotary valve disc, key grooves are evenly distributed in the circumference of the inner wall of the mounting hole, key teeth are arranged on the circumference of the end at the bottom of the transmission shaft corresponding to the key grooves, and the rotary valve disc and the transmission shaft are connected through the key grooves and the key teeth in a matched mode.
The lower surface of the rotary valve disc is provided with a plurality of valve claws corresponding to the side holes of the nozzle, the sections of the valve claws are fan-shaped, and the rotary valve disc is connected with the nozzle in a sliding contact manner through the valve claws.
An annular space is arranged between the circumference of the rotary valve disc and the assembling recess.
Compared with the prior art, the invention has the beneficial effects that:
the pulse continuous jet flow hot-melting combustible ice mining tool generates pulse jet flow through the rotation of the rotary valve disc relative to the spray head, and the speed and the transient kinetic energy of the jet flow can be improved through the central through hole and the side holes of the spray head on the spray head; the combustible ice storage layer can be impacted and broken more conveniently, the contact area between the broken combustible ice storage layer and the hot fluid is increased, and heat exchange and heat conduction between the broken combustible ice storage layer and the hot fluid are facilitated, so that the heat energy utilization rate of the hot fluid is improved, the decomposition rate of the combustible ice is improved, and the exploitation speed of the combustible ice is further improved; the high-speed thermal jet flow can be generated under lower pressure, the load of a pressure pump is reduced, and the combustible ice is easier to decompose under the condition of low-pressure jet flow due to the property that the combustible ice is easier to decompose under lower pressure, so that the exploitation rate of the combustible ice is improved, and the consumption of exploitation energy is reduced.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;
FIG. 3 is a schematic top view of the showerhead of the present invention;
FIG. 4 is a top view of the rotary valve disc of the present invention;
FIG. 5 is a schematic cross-sectional view taken along the line B-B in FIG. 1;
FIG. 6 is a schematic view showing the operation state when the side hole of the nozzle head is opened.
In the figure: 1. an upper housing; 2. an upper joint; 3. a lower housing; 4. a screw rotor; 5. a stator; 6. a spray head; 7. a plug; 8. a drive shaft; 9. a flow tray; 10. a limiting sleeve; 11. a bearing; 12. an upper end cover; 13. a lower end cover; 14. a spring; 15. rotating the valve disc; 16. a keyway; 17. a central through hole of the nozzle; 18. a side hole of the nozzle; 19. a universal coupling; 20. a liquid flow aperture; 21. and a valve jaw.
Detailed Description
This continuous efflux heat of pulse melts combustible ice exploitation instrument includes casing 1, top connection 2, casing 3 down, screw rotor 4, stator 5 and pulse mechanism, 1 end screw thread of top casing installs top connection 2, 1 other end screw thread of top casing installs casing 3 down, be provided with stator 5 on the inner wall of top casing 1, the axial cross-section of stator 5 inner wall is the wave, the inside eccentric form cover of stator 5 is equipped with screw rotor 4, screw rotor 4 is single spiral shell shaft shape, in operation, screw rotor 4 takes place the rotation and does the inner wall of central rotation time screw rotor 4 and stator 5 around stator 5 simultaneously and do not produce the interference.
A plug 7 is fixedly installed inside the upper shell 1 above the screw rotor 4, a central hole for fluid flowing is formed in the plug 7, and the plug 7 is used for preventing the screw rotor 4 from axially moving inside the stator 5.
A pulse mechanism is arranged in the lower shell 3 below the screw rotor 4, the pulse mechanism comprises a transmission shaft 8, a liquid flow disc 9, a limiting sleeve 10, a bearing 11, an upper end cover 12, a lower end cover 13, a spray head 6 and a rotary valve disc 15, the spray head 6 is installed at the lower port of the lower shell 3 in a threaded mode, the spray head 6 is in a water droplet shape, an assembling recess is formed in the upper end of the spray head 6, and external threads are arranged on the circumference of the spray head 6 corresponding to the assembling recess and used for being connected with the lower shell 3; the central part of the assembly concave bottom is provided with a nozzle central through hole 17, and the assembly concave bottom at the periphery of the nozzle central through hole 17 is provided with 4 nozzle side holes 18.
A liquid flow disc 9 is arranged in the lower shell 3 above the spray head 6 through a limiting sleeve 10, and the limiting sleeve 10 is respectively connected with the spray head 6 and the liquid flow disc 9 in an abutting mode; the liquid flow disc 9 is disc-shaped, the central part of the liquid flow disc 9 is provided with an assembly hole, and liquid flow holes 20 are uniformly distributed on the liquid flow disc 9 at the periphery of the assembly hole; a transmission shaft 8 of a reducing body is arranged in an assembly hole of the liquid flow disc 9 through a bearing 11, the top end of the transmission shaft 8 is connected with the screw rotor 4 through a universal coupling 19, the bottom of the transmission shaft 8 extends into an assembly recess below the liquid flow disc 9, a rotary valve disc 15 is arranged at the end of the transmission shaft 8 extending into the assembly recess below the liquid flow disc 9, and an annular space is arranged between the circumference of the rotary valve disc 15 and the assembly recess.
The rotary valve disc 15 is disc-shaped, a mounting hole is formed in the middle of the rotary valve disc 15, key grooves 16 are evenly distributed in the circumference of the inner wall of the mounting hole, key teeth are arranged on the circumference of the end of the bottom of the transmission shaft 8 corresponding to the key grooves 16, and the rotary valve disc 15 is connected with the transmission shaft 15 through the key grooves 16 and the key teeth in a matched mode.
The lower surface of the rotary valve disk 15 is provided with 4 valve claws 21 corresponding to the nozzle side holes 18, the sections of the valve claws 21 are fan-shaped, and the rotary valve disk 15 is connected with the nozzle 6 through the valve claws 21 in a sliding contact manner.
The lower end cover 13 is installed in the lower end opening of the assembly hole of the liquid flow plate 9 through threads, the upper end cover 12 is installed on the upper end opening of the assembly hole through the reducing shoulder of the transmission shaft 8, and the lower end cover 13 is matched with the upper end cover 12 to seal the assembly hole so as to prevent fluid from corroding the bearing 11.
A spring 14 is arranged on a transmission shaft 8 between a rotary valve disc 15 and a liquid flow disc 9, two ends of the spring 14 are respectively in contact connection with the rotary valve disc 15 and the liquid flow disc 9, the purpose is to apply a downward pressure on the rotary valve disc 15 so as to ensure the close contact state between a valve claw 21 of the rotary valve disc 15 and a spray head 6, in work, the rotary valve disc 15 rotates circumferentially under the action of the transmission shaft 8, and the rotary valve disc 15 intermittently opens and closes a spray head side hole 18 on the spray head 6 through the valve claw 21, so that fluid forms pulse jet.
The rotating speed of the screw rotor 4 of the tool is related to the structure and the overflowing flow of the screw rotor 4, the rotating speed of the screw rotor 4 can be controlled through controlling the flow, the pulse frequency is further controlled, the screw rotor 4 rotates for one circle, and the generated jet pulse frequency is 4 HZ.
The structure of the screw rotor 4 is determined to be difficult to change, so that the rotating speed of the screw rotor 4 can be controlled by controlling the flow passing flow, and the pulse jet frequency is further controlled;
the relationship between the rotation speed and the flow rate of the screw rotor 4 is as follows:
wherein:
n-the rotational speed of the screw rotor 4;
q- -the flow through the screw rotor 4;
q- -displacement per revolution of the screw rotor 4;
as- -the area encompassed by the stator 5 wire form;
AR is the area encompassed by the screw rotor 4 linear shape;
n- -number of heads of screw rotor 4;
h-the pitch of the screw rotor 4.
Because the displacement q of each revolution of the screw rotor 4 is related to the structure, the rotating speed can be controlled by controlling the flow passing through the screw rotor 4, and then the pulse jet flow frequency is controlled, the pulse effect of the pulse jet flow mining mode is not obvious under the condition of high pulse frequency, the pulse effect is better under the lower pulse frequency, the lower rotating speed can be obtained under the condition of high flow due to the slow rotating speed of the screw rotor 4, the rotating speed is probably in the range of dozens to hundreds of revolutions per minute, so the lower pulse frequency is easily controlled, and the better pulse jet flow impact effect is achieved.
When the tool works, the upper part of the tool is connected with a continuous pipe through an upper connector 2, the continuous pipe passes through high-pressure heat flow, the high-pressure heat flow flowing into an upper shell 1 of the tool impacts a screw rotor 4, the screw rotor 4 is driven to rotate and simultaneously revolve around the axis of a stator 5 to form composite rotation, the composite rotation of the screw rotor 4 is converted into concentric circumferential rotation through an adapter of a universal coupling 19 and is transmitted to a transmission shaft 8, the rotation of the transmission shaft 8 drives a rotating disc valve 15 to rotate circumferentially, the rotating valve disc 15 is tightly attached to the inner wall surface of a nozzle 6 to rotate, the nozzle center through hole 17 and the nozzle side hole 18 of the nozzle 6 can be opened and closed repeatedly, and the high-pressure heat flow impacting the screw rotor 4 enters the annulus between the circumference of the rotating valve disc 15 and an assembly recess through a liquid flow hole 20.
Because the central through hole 17 of the nozzle is in a normally open state, and the flow area of the central through hole 17 of the nozzle is smaller than that of the liquid flow hole 20, high-pressure heat flow entering the annular space is downwards sprayed out through the central through hole 17 of the nozzle to form jet flow and acts on a combustible ice reservoir.
The pressure change along with time when the jet flow impacts a target body (a combustible ice reservoir) in the tool exploitation process can be divided into a water hammer pressure stage and a stagnation pressure stage, a jet flow compression area can be formed under the high-speed collision of the jet flow and a target material in a short time at the initial stage of jet flow action, and the peak pressure with strong erosion effect, namely the water hammer pressure, can be formed on the target surface when the water is compressed.
The relationship can be simplified as follows:
wherein: pi- -water hammer pressure;
And then the water jet continuously impacts the solid surface, the jet flow is uniformly spread, the stagnation pressure stage is just the stagnation pressure stage, and the calculation formula of the generated stagnation pressure can be expressed as follows:
wherein: p-stagnation pressure;
The formula can easily show that the water hammer pressure is far greater than the stagnation pressure, so that the huge water hammer pressure generated at the initial stage of jet flow plays a huge promoting role in crushing combustible ice, the water hammer pressure can be generated only at the moment when the jet flow just starts to impact a target body, each pulse of the intermittent pulse jet flow can generate jet flow impact once and generate water hammer pressure once, the impact force of the instantaneous jet flow is improved, and the destructive effect of the jet flow on a combustible ice reservoir is increased; the common continuous jet flow mining only generates primary water hammer pressure when the jet flow just contacts a target body at the beginning, and then generates stagnation pressure by continuous impact all the time, so that the crushing effect on a combustible ice storage layer is weaker, the tool effectively improves the heat energy utilization rate of the mining heat flow, reduces the mining energy consumption, and improves the mining rate of the combustible ice, namely, when a spray head side hole 18 is in a fully closed working condition, the heat flow is all ejected from a spray head central through hole 17, at the moment, the input flow is unchanged, the flow passing through the spray head central through hole 17 is rapidly increased, the pressure in the tool is rapidly increased, the heat flow velocity is increased, the kinetic energy is rapidly increased, the impact force is rapidly increased, at the moment, the high-pressure and high-speed heat flow impacts the combustible ice storage layer before (below), and the huge impact force causes structural damage to the combustible ice storage layer; when the rotating disk valve 12 continues to rotate, the four nozzle side holes 18 are all opened, the internal pressure of the tool is reduced, and jet flow generated by the four nozzle side holes 18 instantaneously impacts an ice-burning reservoir layer at the periphery of an impact point of the nozzle central through hole 17, so that the damage area and efficiency of the ice-burning reservoir layer are accelerated on the basis that the impact of the nozzle central through hole 17 causes structural damage to the ice-burning reservoir layer, therefore, intermittent pulse jet flow is formed by matching with the nozzle central through hole 17 in the process that the nozzle side holes 18 are repeatedly opened and closed by the rotating valve disk 15, and the ice-burning reservoir layer is impacted to be broken.
When the nozzle side hole 18 of the tool is closed by the rotating valve disc 15, the flow rate of the nozzle central through hole 17 is increased instantly, and because the nozzle central through hole 17 is in an open state, the jet flow of the nozzle central through hole 17 forms pulse in the process of repeatedly opening and closing the nozzle side hole 18; and as the side hole 18 of the nozzle is continuously opened and closed by the rotary valve disc 15 repeatedly, the pulse jet generated by the central through hole 17 of the nozzle can vibrate the fragments of the combustible ice storage layer, thereby further accelerating the crushing of the fragments of the combustible ice storage layer.
On the other hand, because four shower nozzle side openings 18 and shower nozzle center through-hole 17 of this instrument mutually support and produce alternate pulse efflux, the impact of these two kinds of pulse in turn can form the swirl, and further stir, vibrate the flammable ice piece and make its breakage, and foretell process not only reaches the area of contact who increases its and hot flow through broken flammable ice reservoir and accelerates its and the heat exchange rate of hot flow to because the swirl that produces can further form the stirring effect, very big improvement flammable ice's decomposition rate.
This instrument is under the unchangeable circumstances of input flow, can improve fluidic velocity of flow and improve fluidic transient state kinetic energy greatly through rotating valve disc 15 and shower nozzle 6, more do benefit to and strike broken combustible ice reservoir, broken combustible ice reservoir has increased the area of contact with the hot-fluid again, more do benefit to and carry out heat exchange and heat-conduction with the hot-fluid, thereby the heat utilization rate of hot-fluid has been improved, improve the decomposition rate of combustible ice, and then the exploitation speed of combustible ice has been promoted, the consumption of exploitation energy has been reduced.
Claims (10)
1. The utility model provides a continuous efflux hot melt combustible ice exploitation instrument of pulse, includes casing (1), top connection (2), casing (3) down, screw rotor (4), stator (5) and pulse mechanism, its characterized in that: an upper connector (2) is installed at one end of an upper shell (1) in a threaded mode, a lower shell (3) is installed at the other end of the upper shell (1) in a threaded mode, a stator (5) is arranged on the inner wall of the upper shell (1), a screw rotor (4) is sleeved in the stator (5) in an eccentric mode, a plug (7) is installed inside the upper shell (1) above the screw rotor (4), a pulse mechanism is arranged in the lower shell (3) below the screw rotor (4), and the pulse mechanism is connected with the screw rotor (4).
2. A pulse continuous jet hot melt combustible ice mining tool as claimed in claim 1 wherein: pulse mechanism include transmission shaft (8), liquid flow dish (9), spacing sleeve (10), bearing (11), upper end cover (12), lower end cover (13), shower nozzle (6) and rotation valve dish (15), shower nozzle (6) screw thread installation port under casing (3), liquid flow dish (9) are equipped with through spacing sleeve (10) in lower casing (3) of shower nozzle (6) top, be equipped with transmission shaft (8) through bearing (11) on liquid flow dish (9), transmission shaft (8) top is connected with screw rotor (4) through universal joint (19), transmission shaft (8) bottom extends to liquid flow dish (9) below, transmission shaft (8) end that extends to liquid flow dish (9) below is equipped with rotation valve dish (15), rotation valve dish (15) are connected with shower nozzle (6) contact.
3. A pulse continuous jet hot melt combustible ice mining tool as claimed in claim 2 wherein: the limiting sleeve (10) is respectively connected with the spray head (6) and the liquid flow disc (9) in an abutting mode.
4. A pulse continuous jet hot melt combustible ice mining tool as claimed in claim 2 wherein: the liquid flow disc (9) is disc-shaped, an assembly hole is formed in the center of the liquid flow disc (9), and liquid flow holes (20) are evenly distributed in the liquid flow disc (9) on the periphery of the assembly hole.
5. A pulse continuous jet hot melt combustible ice mining tool as claimed in claim 4 wherein: the inner thread of the lower port of the assembly hole is provided with a lower end cover (13), and the upper port of the assembly hole is provided with an upper end cover (12).
6. A pulse continuous jet hot melt combustible ice mining tool as claimed in claim 4 wherein: and a spring (14) is arranged on a transmission shaft (8) between the rotary valve disc (15) and the liquid flow disc (9), and two ends of the spring (14) are respectively in contact connection with the rotary valve disc (15) and the liquid flow disc (9).
7. A pulse continuous jet hot melt combustible ice mining tool as claimed in claim 2 wherein: shower nozzle (6) be the drop form, shower nozzle (6) upper end is provided with the assembly concave, is provided with the external screw thread on shower nozzle (6) circumference that the assembly is concave to correspond, assembly concave bottom central point is provided with shower nozzle (6) central through hole, shower nozzle (6) central through hole outlying assembly concave bottom is provided with a plurality of shower nozzle side openings (18).
8. A pulse continuous jet hot melt combustible ice mining tool as claimed in claim 2 wherein: the rotary valve disc (15) is disc-shaped, a mounting hole is formed in the middle of the rotary valve disc (15), key grooves (16) are evenly distributed in the circumference of the inner wall of the mounting hole, key teeth are arranged on the circumference of the end at the bottom of the transmission shaft (8) corresponding to the key grooves (16), and the rotary valve disc (15) is connected with the transmission shaft (8) through the key grooves (16) and the key teeth in a matched mode.
9. A pulse continuous jet hot melt combustible ice mining tool as claimed in claim 8 wherein: the lower surface of the rotary valve disc (15) is provided with a plurality of valve claws (21) corresponding to the nozzle side holes (18), the sections of the valve claws (21) are fan-shaped, and the rotary valve disc (15) is connected with the nozzle (6) in a sliding contact manner through the valve claws (21).
10. A pulse continuous jet hot melt combustible ice mining tool as claimed in claim 7 wherein: an annular space is arranged between the assembling concave and the circumference of the rotary valve disc (15).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110593130.0A CN113187455B (en) | 2021-05-28 | 2021-05-28 | Pulse continuous jet flow hot melting combustible ice mining tool |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110593130.0A CN113187455B (en) | 2021-05-28 | 2021-05-28 | Pulse continuous jet flow hot melting combustible ice mining tool |
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| CN113187455A true CN113187455A (en) | 2021-07-30 |
| CN113187455B CN113187455B (en) | 2023-03-14 |
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| CN105370213A (en) * | 2015-06-18 | 2016-03-02 | 中石化石油工程技术服务有限公司 | Underground pulsing jet drill bit device |
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| CN106761386A (en) * | 2017-03-14 | 2017-05-31 | 长江大学 | A kind of drilling well auxiliary rock instrument |
| CN106917586A (en) * | 2017-05-09 | 2017-07-04 | 长江大学 | A kind of Well screw hydroscillator |
| CN108222875A (en) * | 2018-03-20 | 2018-06-29 | 长江大学 | A kind of deep water waterpower cutter device of pressure pulse waveform indicating type |
| CN109779520A (en) * | 2018-07-27 | 2019-05-21 | 中国石油大学(华东) | A kind of pulse type spiral percussion drilling tool |
| AU2021101085A4 (en) * | 2021-03-01 | 2021-05-06 | China University Of Petroleum (East China) | Petroleum drilling acceleration device |
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2021
- 2021-05-28 CN CN202110593130.0A patent/CN113187455B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105370213A (en) * | 2015-06-18 | 2016-03-02 | 中石化石油工程技术服务有限公司 | Underground pulsing jet drill bit device |
| CN106014316A (en) * | 2016-05-26 | 2016-10-12 | 中国石油集团渤海钻探工程有限公司 | Shock-resisting downhole screw type pulse generator |
| CN106761386A (en) * | 2017-03-14 | 2017-05-31 | 长江大学 | A kind of drilling well auxiliary rock instrument |
| CN106917586A (en) * | 2017-05-09 | 2017-07-04 | 长江大学 | A kind of Well screw hydroscillator |
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| CN109779520A (en) * | 2018-07-27 | 2019-05-21 | 中国石油大学(华东) | A kind of pulse type spiral percussion drilling tool |
| AU2021101085A4 (en) * | 2021-03-01 | 2021-05-06 | China University Of Petroleum (East China) | Petroleum drilling acceleration device |
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