CN113323591B - Ultrahigh-pressure fluid pressure conversion device - Google Patents
Ultrahigh-pressure fluid pressure conversion device Download PDFInfo
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- CN113323591B CN113323591B CN202110584382.7A CN202110584382A CN113323591B CN 113323591 B CN113323591 B CN 113323591B CN 202110584382 A CN202110584382 A CN 202110584382A CN 113323591 B CN113323591 B CN 113323591B
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- 239000012530 fluid Substances 0.000 title claims abstract description 128
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 115
- 238000007789 sealing Methods 0.000 claims abstract description 92
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 81
- 239000003245 coal Substances 0.000 claims description 36
- 239000011435 rock Substances 0.000 claims description 22
- 230000006835 compression Effects 0.000 claims description 17
- 238000007906 compression Methods 0.000 claims description 17
- 230000002093 peripheral effect Effects 0.000 claims description 13
- 238000005553 drilling Methods 0.000 abstract description 33
- 230000001105 regulatory effect Effects 0.000 description 12
- 239000012634 fragment Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets
-
- 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
- E21B12/00—Accessories for drilling tools
-
- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/02—Drilling rigs characterised by means for land transport with their own drive, e.g. skid mounting or wheel mounting
-
- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
- E21C25/60—Slitting by jets of water or other liquid
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses an ultrahigh pressure fluid pressure conversion device which comprises an ultrahigh pressure fluid pressure conversion device body and an ultrahigh pressure fluid pressure conversion valve body, wherein the front end of the ultrahigh pressure fluid pressure conversion device body is provided with a first sealing section, the tail end of the ultrahigh pressure fluid pressure conversion device body is provided with a second sealing section, the front end of the second sealing section in the ultrahigh pressure fluid pressure conversion device body is provided with a stepped through hole, the ultrahigh pressure fluid pressure conversion valve body is arranged in the stepped through hole, and the threshold value for sealing a water flow passage of the ultrahigh pressure fluid pressure conversion device is adjusted through the ultrahigh pressure fluid pressure conversion valve body. The ultrahigh-pressure fluid pressure conversion device can adjust a reasonable pressure conversion threshold value during low-pressure drilling by rotating the pressure adjusting screw according to the working fluid pressure of drilling equipment, and ultrahigh-pressure slotting during conventional low-pressure drilling and drill withdrawal of the drilling equipment is realized.
Description
Technical Field
The invention relates to the technical field of high-pressure water jet cutting devices, in particular to an ultrahigh-pressure fluid pressure conversion device.
Background
Along with the continuous application of the emerging technology and equipment for coal exploitation, the exploitation depth is continuously deepened to the deep part at the speed of about 10-20 m each year, and the dynamic disaster of deep coal and rock gas gradually becomes a main problem for restricting the safe and efficient production of the coal mine. The dynamic disaster control of coal and rock gas in deep mines is carried out from the angles that the gas extraction of the coal seam meets the standards and the effective pressure relief is carried out, the hydraulic pressure relief and reflection increase measures for the coal seam have the effect of half effort, the reaming pressure relief and reflection increase of medium hard coal and hard coal under the condition of deep high stress are required to be greatly improved, the water jet pressure is further improved, the coal breaking efficiency and the coal breaking depth are further improved, and the dynamic disaster control problem of the coal and rock in the deep mines is solved. The hydraulic reaming, hydraulic slotting, drilling and cutting integration and the like are widely used as pressure relief and permeability improvement measures, the working pressure of the existing hydraulic slotting and hydraulic reaming devices is 30-50 MPa, and the coal rock with higher hardness is difficult to effectively cut; the 100MPa ultrahigh-pressure water jet slotting device is also put into use, but the high-low pressure conversion threshold value of the existing ultrahigh-pressure water jet slotting device is fixed and cannot be adjusted, the width of a cutting slot is narrow, and the pressure relief and anti-reflection effects are not obvious.
Disclosure of Invention
In order to solve the above technical problems, an object of the present invention is to provide an ultrahigh pressure fluid pressure conversion device. The ultrahigh-pressure fluid pressure conversion device can adjust a reasonable pressure conversion threshold value during low-pressure drilling by rotating the pressure adjusting screw according to the working fluid pressure of drilling equipment, and ultrahigh-pressure slotting during conventional low-pressure drilling and drill withdrawal of the drilling equipment is realized.
The above object of the present invention is achieved by the following technical solutions: the device comprises an ultrahigh pressure fluid pressure conversion device body and an ultrahigh pressure fluid pressure conversion valve body, wherein the front end of the ultrahigh pressure fluid pressure conversion device body is provided with a first sealing section, the tail end of the ultrahigh pressure fluid pressure conversion device body is provided with a second sealing section, the front end of the second sealing section in the ultrahigh pressure fluid pressure conversion device body is provided with a stepped through hole, the ultrahigh pressure fluid pressure conversion valve body is arranged in the stepped through hole, and the threshold value for sealing the water flow passage of the ultrahigh pressure fluid pressure conversion device is adjusted through the ultrahigh pressure fluid pressure conversion valve body.
Further, a plurality of water jet nozzles are symmetrically arranged on the ultrahigh pressure fluid pressure conversion device body along the circumferential direction in a staggered manner.
Further, the water jet nozzles are located between the second sealing section and the ultrahigh pressure fluid pressure conversion valve body, and the dislocation distance L between two adjacent water jet nozzles is 2 cm-6 cm.
Further, the water jet nozzles are direct jet nozzles, and the number of the water jet nozzles is 2-3; the included angle between each water jet nozzle and the side wall of the ultrahigh pressure fluid pressure conversion device body is 90 degrees.
Further, the front end of each water jet nozzle on the ultrahigh pressure fluid pressure conversion device body is respectively provided with coal rock fragments protruding outwards.
Further, the first sealing section comprises a first straight shaft guiding section, a first O-shaped ring, a first right-angle sliding ring and a first inner cone sealing cone thread, an annular groove is formed in the first straight shaft guiding section, the first O-shaped ring and the first right-angle sliding ring are installed in the annular groove, and the rear end of the first straight shaft guiding section is provided with the first inner cone sealing cone thread.
Further, a first chamfer is arranged at the top of the first straight-shaft guide section, and the first chamfer angle is 30-60 degrees.
Further, the second sealing section comprises a first outer cone sealing cone thread and a first inner cylindrical hole section which are arranged on the inner peripheral surface of the ultrahigh pressure fluid pressure conversion device body and are sequentially arranged from the tail end to the front end.
Further, the ultrahigh pressure fluid pressure conversion valve body comprises a compression spring, a valve rod, a positioning valve core, a pressure adjusting screw and a retainer ring which are sequentially arranged from front to back, the compression spring is sleeved outside the valve rod, the positioning valve core is sleeved outside the pressure adjusting screw, the positioning valve core and the inner peripheral surface of the ultrahigh pressure fluid pressure conversion device body can be axially movably installed through a key slot, the front end of the pressure adjusting screw is embedded into the valve rod and connected through a thread mode, the retainer ring is positioned at the rear end of the pressure adjusting screw and is arranged in a groove arranged on the inner peripheral surface of the ultrahigh pressure fluid pressure conversion device body, a first conical surface is arranged at the reducing position of the stepped through hole, and a second conical surface matched with the first conical surface is arranged at the front end of the valve rod; the distance between the front end of the valve rod and the first conical surface of the stepped through hole is adjusted by rotating the pressure adjusting screw, so that the deformation of the compression spring is changed, and the threshold value of the water flow passage of the closed ultrahigh-pressure fluid pressure conversion device is further adjusted; when the pressure of the working fluid is greater than the threshold value, the second conical surface contacts with the first conical surface, and a water flow passage in the ultrahigh-pressure fluid pressure conversion device is closed; when the pressure of the working fluid is smaller than the threshold value, the second conical surface is separated from the first conical surface, and a water circulation passage in the ultrahigh-pressure fluid pressure conversion device is opened.
Further, the front end of the compression spring is abutted against the step surface of the step through hole of the ultrahigh pressure fluid pressure conversion device body, and the rear end is abutted against the front end surface of the positioning valve core.
Compared with the prior art, the invention has the beneficial effects that: the ultrahigh-pressure fluid pressure conversion device can adjust a reasonable pressure conversion threshold value during low-pressure drilling by rotating the pressure adjusting screw according to the working fluid pressure of drilling equipment, and ultrahigh-pressure slotting during conventional low-pressure drilling and drill withdrawal of the drilling equipment is realized. The water jet nozzles are installed in a staggered mode, multiple channels of slots are formed in the coal rock body through rotation in the ultra-high pressure slotting process, the multiple channels of slots are synthesized into a hydraulic slot with a certain width and depth under the action of gas pressure and ground stress, the width of the original slot is increased by 2-3 times, the exposed area of the coal body is effectively increased, and cracks in the coal body are increased, so that the coal body is fully depressurized and anti-reflection. Meanwhile, as the coal rock fragments are arranged at the front part of the water jet nozzle, the coal rock fragments protect the water jet nozzle from being damaged by coal rock walls and broken coal rock bodies during drilling, and the coal rock fragments can effectively break large coal rock blocks formed by ultrahigh-pressure hydraulic slotting during ultrahigh-pressure hydraulic slotting, so that the risk of hole blockage in the hydraulic slotting process is effectively reduced.
Drawings
The invention is further described below with reference to the drawings and the detailed description.
FIG. 1 is a schematic view of the structure of an ultrahigh pressure fluid pressure conversion device of the present invention;
FIG. 2 is a schematic diagram of an adjustable ultra-high pressure water jet cutting device;
FIG. 3 is a schematic view of the structure of an ultrahigh pressure sealing drill rod with a circular through hole in the drill rod body;
FIG. 4 is a schematic view of the ultra-high pressure sealed drill pipe with stepped holes in the drill pipe body;
FIG. 5 is a schematic view of a spiral groove structure on an ultra-high pressure sealed drill rod with a circular through hole inside the drill rod body;
FIG. 6 is a schematic view of the structure of a helical blade on an ultra-high pressure sealed drill pipe with a stepped hole inside the drill pipe body;
in the figure: 2. an ultrahigh pressure fluid pressure conversion device; 21. an ultra-high pressure fluid pressure conversion device body; 211. a first seal segment; 2111. a first straight shaft guide section; 2112. a first internal cone seal cone thread; 2113. a first O-ring; 2114. a first right angle slip ring; 212. a second seal section; 2121. a first outer cone seal cone thread; 2122. a first inner cylindrical bore section; 213. a stepped through hole; 214. a first conical surface; 22. an ultrahigh pressure fluid pressure switching valve body; 221. a compression spring; 222. a valve stem; 2221. a second conical surface; 223. positioning a valve core; 224. a pressure adjusting screw; 225. a retainer ring; 23. a water jet nozzle; 24. breaking coal and rock; 25. a first chamfer;
1. a drill bit; 3. ultra-high pressure sealing drill rod; 31. a drill rod body; 311. a first axial seal structure; 3111. a second straight shaft guide section; 3112. a second O-ring; 3113. a second right angle slip ring; 3114. a second internal cone seal cone thread; 312. a second axial seal structure; 3121. a second outer cone seal cone thread; 3122. a second inner cylindrical bore section; 313. a circular through hole; 314. a spiral groove; 315. a stepped hole; 316. a helical blade; 32. a second chamfer; 4. a drilling machine; 5. ultra-high pressure rotary water tail; 6. an ultra-high pressure hose; 7. a pressure relief regulating valve; 8. ultrahigh-pressure hydraulic pump station; 9. a hydraulic slot; 10. annular seam slots of the coal seam; 11. and an auxiliary rock breaking nozzle.
Detailed Description
Example 1
The details of the invention and its embodiments are further described below with reference to the accompanying drawings and examples.
Referring to fig. 1, an ultrahigh pressure fluid pressure conversion device comprises an ultrahigh pressure fluid pressure conversion device body 21 and an ultrahigh pressure fluid pressure conversion valve body 22, wherein a first sealing section 211 is arranged at the front end of the ultrahigh pressure fluid pressure conversion device body 21, a second sealing section 212 is arranged at the tail end of the ultrahigh pressure fluid pressure conversion device body, a stepped through hole 213 is arranged at the front end of the second sealing section 212 in the ultrahigh pressure fluid pressure conversion device body 21, and the ultrahigh pressure fluid pressure conversion valve body 22 is installed in the stepped through hole 213, so that the threshold value for sealing the water flow passage of the ultrahigh pressure fluid pressure conversion device is adjusted through the ultrahigh pressure fluid pressure conversion valve body.
A plurality of water jet nozzles 23 are installed in the ultrahigh pressure fluid pressure conversion device body 21 in a staggered and symmetrical manner in the circumferential direction.
The first sealing section 211 comprises a first straight shaft guiding section 2111, a first O-shaped ring 2113, a first right angle slip ring 2114 and a first inner cone sealing cone thread 2112, wherein an annular groove is formed in the first straight shaft guiding section 2111, the first O-shaped ring 2113 and the first right angle slip ring 2114 are installed in the annular groove, and the rear end of the first straight shaft guiding section 2111 is provided with the first inner cone sealing cone thread 2112.
The second seal section 212 includes a first outer cone seal cone thread 2121 and a first inner cylindrical hole section 2122 which are provided on the inner peripheral surface of the ultrahigh pressure fluid pressure conversion device body 21 in this order from the trailing end toward the leading end.
The water jet nozzles 23 are located between the second sealing section 212 and the ultrahigh pressure fluid pressure conversion valve body 22, and the dislocation distance L between two adjacent water jet nozzles 23 is 2 cm-6 cm.
The water jet nozzles are direct jet nozzles, and the number of the water jet nozzles is 2-3; each water jet nozzle 23 makes an angle of 90 ° with the side wall of the ultrahigh-pressure fluid pressure conversion device body 21.
The front end of each water jet nozzle 23 on the ultrahigh pressure fluid pressure conversion device body 21 is respectively provided with a coal rock breaking piece 24 protruding outwards, the coal rock breaking pieces 24 are made of diamond composite sheets or hard alloy, and large coal rock blocks formed by ultrahigh pressure hydraulic slotting can be effectively broken through the arrangement of the coal rock breaking pieces 24, so that the risk of hole blockage in the hydraulic slotting process is effectively reduced.
The ultrahigh pressure fluid pressure conversion valve body 22 comprises a compression spring 221, a valve rod 222, a positioning valve core 223, a pressure adjusting screw 224 and a retainer ring 225 which are sequentially arranged from front to back, the compression spring 221 is sleeved outside the valve rod 222, the positioning valve core 223 is sleeved outside the pressure adjusting screw 224, the positioning valve core 223 and the inner peripheral surface of the ultrahigh pressure fluid pressure conversion device body 21 can be axially and movably arranged through a key slot, the front end of the pressure adjusting screw 224 is embedded in the valve rod 222 and is connected through a thread mode, the retainer ring 225 is positioned at the rear end of the pressure adjusting screw 224 and is arranged in a groove arranged on the inner peripheral surface of the ultrahigh pressure fluid pressure conversion device body 21, a first conical surface 214 is arranged at the reducing position of the stepped through hole 213, and a second conical surface 2221 matched with the first conical surface 214 is arranged at the front end of the valve rod 222; the distance between the front end of the positioning valve core 223 and the first conical surface 214 of the stepped through hole 213 is adjusted by rotating the pressure adjusting screw 224, so that the deformation of the compression spring 221 is changed, and the threshold value of the water flow passage of the closed ultrahigh-pressure fluid pressure conversion device is further adjusted; when the working fluid pressure is greater than the threshold value, the second conical surface 2221 contacts with the first conical surface 214, the water flow passage in the ultrahigh-pressure fluid pressure conversion device is closed, and when the working fluid pressure is less than the threshold value, the second conical surface 2221 is separated from the first conical surface 214, and the water flow passage in the ultrahigh-pressure fluid pressure conversion device is opened; according to the invention, the compression amount of the compression spring 221 can be adjusted by rotating the pressure adjusting screw 224, so that the pressure conversion threshold value is adjusted;
the front end of the compression spring 221 abuts against the stepped surface of the stepped through hole 213 of the ultrahigh pressure fluid pressure conversion device body 21, and the rear end abuts against the front end surface of the positioning spool 223.
The top of the first straight shaft guiding section 2111 is provided with a first chamfer 25, and the angle of the first chamfer 25 is 30-60 degrees.
A clearance is provided between the outer peripheral surface of the valve rod 222 and the inner peripheral surface of the larger diameter through hole in the stepped through hole 213 of the ultrahigh pressure fluid pressure-converting device body 21, and the clearance is 2mm to 5mm.
The working principle of the invention is as follows: a reasonable pressure conversion threshold value is determined according to the pressure of the working fluid supplied to the drilling equipment, the distance between the front end of the valve rod 222 and the first conical surface 214 of the stepped through hole 213 is adjusted by rotating the pressure adjusting screw 224, the deformation amount of the compression spring 221 is changed, and the threshold value for closing the water flow passage of the ultrahigh pressure fluid pressure conversion device is further adjusted. When the pressure of the working fluid supplied to the drilling equipment is greater than the threshold value, the second conical surface 2221 contacts with the first conical surface 214, the water flow passage in the ultrahigh pressure fluid pressure conversion device is closed, the working fluid is sprayed out through the water jet nozzle, and at the moment, the pipeline pressure is further increased to an ultrahigh pressure state to realize ultrahigh pressure slotting; when the pressure of the working fluid supplied to the drilling apparatus is less than the threshold value, the second tapered surface 2221 is separated from the first tapered surface 214, the water flow path in the ultrahigh pressure fluid pressure switching device is opened, the working fluid normally passes, and the drilling apparatus performs conventional low pressure drilling.
Example two
The ultrahigh pressure fluid pressure conversion device is applied to an adjustable ultrahigh pressure water jet cutting device, and the specific structure of the adjustable ultrahigh pressure water jet cutting device is as follows:
referring to fig. 2, the adjustable ultra-high pressure water jet cutting device comprises a drill bit 1, an ultra-high pressure fluid pressure conversion device 2, an ultra-high pressure sealing drill rod 3, an ultra-high pressure rotary water tail 5, a plurality of ultra-high pressure hoses 6 and an ultra-high pressure hydraulic pump station 8 which are sequentially connected from front to back; a drilling machine 4 is arranged below the ultrahigh pressure sealing drill rod 3 and driven by a rotary device on the drilling machine 4 to rotate and feed, pressure relief regulating valves are arranged among the ultrahigh pressure hoses, and the ultrahigh pressure fluid pressure conversion device 2 is connected with the ultrahigh pressure sealing drill rod 3, the ultrahigh pressure sealing drill rod 3 and the ultrahigh pressure rotary water tail 5 by adopting ultrahigh pressure axial sealing structures; the ultrahigh pressure hose 6 is connected to the tail of the ultrahigh pressure sealing drill rod 3 through the ultrahigh pressure rotary water tail 5, the ultrahigh pressure water pump station 8 supplies water to the ultrahigh pressure fluid pressure conversion device 2 and the drill bit 1 through the ultrahigh pressure hose 6 and the ultrahigh pressure sealing drill rod 3, and the pressure relief regulating valve 7 is used for regulating pipeline pressure so as to control the sealing and opening of a water flow passage in the ultrahigh pressure fluid pressure conversion device, thereby realizing low pressure drilling and ultrahigh pressure slotting of the adjustable ultrahigh pressure water jet cutting device.
When a plurality of ultrahigh pressure hoses 6 are connected, ultrahigh pressure pulse-resistant hose joints are adopted for connection among the ultrahigh pressure hoses 6.
The ultrahigh-pressure rotary water tail 5 is fully sealed by adopting hard alloy, and the flow coefficient is more than 3.0.
The ultrahigh-pressure hydraulic pump station is a horizontal five-plunger reciprocating pump, the rated pressure is more than 100MPa, and the rated flow is more than 6m 3 /h。
Example III
Referring to fig. 2, the application method of the adjustable ultrahigh pressure water jet cutting device comprises the following specific implementation steps:
(1) The ultra-high pressure sealing drill rod 3 is arranged on the drilling machine 4 and driven to rotate by a turning device on the drilling machine, and the ultra-high pressure fluid pressure conversion device 2 is arranged at the front end of the ultra-high pressure sealing drill rod 3; the drill bit 1 is arranged at the front end of the ultrahigh-pressure fluid pressure conversion device 2; the ultrahigh pressure hose 6 is connected to the rear of the ultrahigh pressure sealing drill rod 3 through the ultrahigh pressure rotary water tail 5; the pressure relief regulating valve 7 is arranged among the ultrahigh pressure hoses 6, and the ultrahigh pressure hydraulic pump station 8 supplies water to the ultrahigh pressure sealing drill rod 3, the ultrahigh pressure fluid pressure mounting and changing device 2 and the drill bit 1 through the ultrahigh pressure hoses 6 and the ultrahigh pressure rotary water tail 5;
(2) A reasonable pressure conversion threshold value is determined according to the pressure of working fluid supplied to drilling equipment, the deformation of the compression spring 221 is changed by rotating the pressure regulating screw 224, so that the threshold value for closing the water flow passage of the ultrahigh pressure fluid pressure conversion device 2 is regulated, and the maximum pressure P1 allowed to pass through the water outlet of the drill bit 1 is changed;
(3) The pressure of water conveyed by the ultrahigh pressure hose 6 is regulated through the pressure relief regulating valve 7, so that the closing and opening of a water flow passage in the ultrahigh pressure fluid pressure conversion device are controlled, and the low-pressure drilling and ultrahigh pressure slotting of the adjustable ultrahigh pressure water jet cutting device are realized.
The step (3) specifically comprises the following steps:
the pressure of water conveyed by the ultrahigh-pressure hose 6 is regulated by the pressure relief regulating valve 7, when the pressure between the pressure relief regulating valve 6 and the ultrahigh-pressure rotary water tail 5 is smaller than P1, the second conical surface 2221 is separated from the first conical surface 214, and high-pressure water is sprayed out from an auxiliary rock breaking nozzle 11 at the front end of the high-pressure hydraulic auxiliary coal breaking drill bit 1 through the inside of the ultrahigh-pressure fluid pressure conversion device 2 to punch and cut coal at the front end of the drill hole for auxiliary drilling; when the output pressure of the ultrahigh-pressure hydraulic pump station 8 is greater than P1, the position of the valve rod 222 in the ultrahigh-pressure fluid pressure conversion device 2 moves forward, the second conical surface is matched with the first conical surface 214 of the stepped through hole 213 of the ultrahigh-pressure fluid pressure conversion device body 21 to form a seal, a water flow passage is closed, the pipeline pressure is increased, high-pressure water is sprayed out through the water jet nozzles 23 which are installed in a staggered manner, a coal seam is punched and cut to form a hydraulic slot 9 with a certain interval, ultrahigh-pressure slotting is realized, and a plurality of hydraulic slots 9 are mutually fused into a coal seam annular slot 10 with a certain width and depth under the disturbance of water jet of ground stress, gas pressure and sonic velocity.
The ultrahigh pressure slotting mode of the step (3) is forward slotting and backward slotting; the specific operation steps are that the drilling machine 4 executes the step (3) of ultra-high pressure slotting for 2 times at the two ends of the stroke of the single ultra-high pressure sealing drill rod 3 in the forward slotting or the backward slotting process, and then the step (3) is repeated after more than 2 ultra-high pressure sealing drill rods 3 are added or reduced until the whole drilling hole completes ultra-high pressure hydraulic slotting operation.
The drilling machine 4 is a crawler-type automatic drilling machine, the ultrahigh-pressure hydraulic pump station 8 is a crawler-type, and the drilling machine 4 and the ultrahigh-pressure hydraulic pump station 8 can be remotely operated.
Referring to fig. 3 and 4, the ultra-high pressure sealing drill rod 3 of the present invention includes a drill rod body 31, a first axial sealing structure 311 is disposed on an outer peripheral surface of a front end of the drill rod body 31, a second axial sealing structure 312 is disposed on an inner peripheral surface of a rear end of the drill rod body 31, the first axial sealing structure 311 includes a second straight shaft guide section 3111, a second inner cone sealing cone thread 3114, a second O-ring 3112 and a second right angle slip ring 3113, a rectangular groove is disposed on the second straight shaft guide section 3111, a second O-ring 3112 and a second right angle slip ring 3113 are mounted in the ring groove, and a second inner cone sealing cone thread 3114 is disposed at a rear end of the second straight shaft guide section 3111; the second axial seal structure 312 includes a second outer cone seal cone thread 3121 and a second inner cylindrical bore segment 3122 disposed in sequence from back to front; the second straight axial guide segment 3111 and the second inner cylindrical bore segment 3122 are concentric, and the second inner cylindrical bore segment 3122 has an inner diameter greater than the outer diameter of the second straight axial guide segment 3111; when the ultrahigh pressure sealing drill rods 3 are connected end to end in sequence, the first axial sealing structures 311 of the adjacent two ultrahigh pressure sealing drill rods 3 are matched with the second axial sealing structures 312, and the second O-shaped rings 3112 and the second right-angle slip rings 3113 are sequentially arranged in the rectangular grooves to form combined sealing; the second straight shaft guide section 3111 and the second inner cylindrical bore section 3122 cooperate to form a clearance seal that reduces leakage and pressure transmission of high pressure water to the combination seal; the second inner cone seal cone thread 3114 and the second outer cone seal cone thread 3121 cooperate to form a cone thread seal.
Referring to fig. 3, the drill rod body 31 is of a hollow cylindrical shape, and a circular through hole 313 coaxially provided with the second inner cylindrical hole section 3122 is provided at a front end of the second axial seal structure 312 in the drill rod body 31.
Referring to fig. 5, a spiral groove 314 is formed on the outer circumferential wall of the drill rod body 31, which is beneficial to discharging coal and rock fragments when implementing the hydraulic measure, and simultaneously reduces the weight of the drill rod and labor intensity.
Referring to fig. 4, the drill rod body 31 is of a hollow cylindrical shape, and a stepped hole 315 coaxially provided with the second inner cylindrical hole section 3122 is provided at a front end of the second axial seal structure 312 in the drill rod body 31.
Referring to fig. 6, a spiral blade 316 protruding to the outside of the drill rod body 31 is provided on the outer circumferential wall of the drill rod body 31, so that coal and rock fragments can be discharged when the hydraulic measure is performed.
The top of the second straight shaft guide section 3111 is provided with a second chamfer 32. The second chamfer 32 has an angle of 30 deg. to 60 deg., preferably 45 deg..
The second O-ring 3112 and the second right angle slip ring 3113 are installed in order of water pressure direction.
The distance D from the front end of the rectangular groove to the top end of the second straight shaft guide section 3111 is larger than 15mm.
The second straight axial guide segment 3111 and the second inner cylindrical bore segment 3122 are concentric, and the second inner cylindrical bore segment 3122 has an inner diameter that is greater than the outer diameter of the second straight axial guide segment 3111.
The second inner cylindrical bore section 3122 has an inner diameter that is 0.5mm greater than the outer diameter of the second straight shaft guide section 3111.
The second straight shaft guide section 3111 and the first inner cylindrical bore section 2122 of the ultrahigh-pressure fluid pressure converting apparatus 2 are concentric, and the inner diameter of the first inner cylindrical bore end 2122 is larger than the outer diameter of the second straight shaft guide section 3111 by 0.5mm. The structure realizes the clearance seal of the ultrahigh pressure sealing drill rod 3 and the ultrahigh pressure fluid pressure conversion device 2, and reduces the leakage and pressure transmission of high pressure water to the combined seal.
The ultrahigh pressure sealing drill rod 3 is connected with the ultrahigh pressure fluid pressure conversion device 2 by adopting an ultrahigh pressure axial sealing structure during installation, and specifically comprises the following components: the second inner cone sealing cone thread 3114 at the front end of the ultra-high pressure sealing drill rod 3 and the first outer cone sealing cone thread 2121 at the tail end of the ultra-high pressure fluid pressure conversion device 2 form thread sealing; the second straight shaft guide section 3111 and the second chamfer 32 at the top thereof facilitate the installation of the ultra-high pressure sealing drill rod 3, the second O-ring 3112 and the second right-angle slip ring 3113 are sequentially installed in the rectangular groove to form combined seal, the bearing capacity is high, and the second inner cone sealing cone thread 3114 of the ultra-high pressure sealing drill rod 3 and the first outer cone sealing cone thread 2121 of the ultra-high pressure fluid pressure conversion device 2 form cone thread seal.
When a plurality of ultra-high pressure sealing drill rods 3 are connected end to end in sequence, the ultra-high pressure axial sealing structure is also adopted for connection, and the method specifically comprises the following steps: the first axial sealing structure 311 of the two adjacent ultra-high pressure sealing drill rods 3 is matched with the second axial sealing structure 312, and a concentric annular gap exists between the second straight shaft guide section 3111 and the second inner cylindrical hole section 3122, so that gap sealing is formed, and leakage and pressure transmission of high pressure water to the combined sealing are reduced. The second O-shaped ring 3112 and the second right-angle slip ring 3113 are sequentially arranged in the rectangular groove to form combined seal, so that the bearing capacity is high; the second inner cone sealing cone thread 3114 at the front end of the latter drill rod and the second outer cone sealing cone thread 3121 at the tail end of the former drill rod form cone thread sealing; the second straight shaft guide section 3111 and the second chamfer 32 on top of it facilitate the sequential installation of the ultra high pressure seal drill rod 3.
The ultrahigh pressure sealing drill rod 3 and the ultrahigh pressure rotary water tail 5 are also connected by adopting the ultrahigh pressure axial sealing structure between the ultrahigh pressure sealing drill rod 3 and the ultrahigh pressure fluid pressure conversion device 2, and the specific connection structure is not described in detail.
The ultrahigh pressure axial sealing structure between the ultrahigh pressure sealing drill rod 3 and the ultrahigh pressure fluid pressure conversion device 2, between the ultrahigh pressure sealing drill rod 3 and between the ultrahigh pressure sealing drill rod 3 and the ultrahigh pressure rotary water tail 5 comprises multiple seals formed by gap sealing, combined sealing and conical thread sealing, and the highest bearing pressure of the ultrahigh pressure axial sealing structure can reach 400MPa, even higher, and the ultrahigh pressure axial sealing structure has the advantages of high pressure resistance, smooth installation, multiple repeated disassembly times and the like.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (9)
1. The ultrahigh pressure fluid pressure conversion device is characterized by comprising an ultrahigh pressure fluid pressure conversion device body and an ultrahigh pressure fluid pressure conversion valve body, wherein the front end of the ultrahigh pressure fluid pressure conversion device body is provided with a first sealing section, the tail end of the ultrahigh pressure fluid pressure conversion device body is provided with a second sealing section, the front end of the second sealing section in the ultrahigh pressure fluid pressure conversion device body is provided with a stepped through hole, the ultrahigh pressure fluid pressure conversion valve body is arranged in the stepped through hole, and the threshold value for sealing the water flow passage of the ultrahigh pressure fluid pressure conversion device is adjusted through the ultrahigh pressure fluid pressure conversion valve body;
the ultrahigh pressure fluid pressure conversion valve body comprises a compression spring, a valve rod, a positioning valve core, a pressure adjusting screw and a retainer ring which are sequentially arranged from front to back, the compression spring is sleeved outside the valve rod, the positioning valve core is sleeved outside the pressure adjusting screw, the positioning valve core and the inner peripheral surface of the ultrahigh pressure fluid pressure conversion device body can be axially movably installed through a key slot, the front end of the pressure adjusting screw is embedded into the valve rod and connected through a thread mode, the retainer ring is positioned at the rear end of the pressure adjusting screw and is arranged in a groove arranged on the inner peripheral surface of the ultrahigh pressure fluid pressure conversion device body, a first conical surface is arranged at the reducing position of the stepped through hole, and a second conical surface matched with the first conical surface is arranged at the front end of the valve rod; the distance between the positioning valve core and the first conical surface of the stepped through hole is adjusted by rotating the pressure adjusting screw, so that the deformation of the compression spring is changed, and the threshold value of the water flow passage of the closed ultrahigh pressure fluid pressure conversion device is further adjusted; when the pressure of the working fluid is greater than the threshold value, the second conical surface contacts with the first conical surface, and a water flow passage in the ultrahigh-pressure fluid pressure conversion device is closed; when the pressure of the working fluid is smaller than the threshold value, the second conical surface is separated from the first conical surface, and a water circulation passage in the ultrahigh-pressure fluid pressure conversion device is opened.
2. The ultrahigh-pressure fluid pressure conversion device according to claim 1, wherein a plurality of water jet nozzles are installed in the ultrahigh-pressure fluid pressure conversion device body in a circumferentially offset symmetry.
3. The ultrahigh-pressure fluid pressure conversion device according to claim 2, wherein the plurality of water jet nozzles are located between the second sealing section and the ultrahigh-pressure fluid pressure conversion valve body, and the misalignment distance L between two adjacent water jet nozzles is 2cm to 6cm.
4. The ultrahigh-pressure fluid pressure conversion device as claimed in claim 2, wherein the number of the water jet nozzles is 2-3, and the number of the water jet nozzles is direct jet nozzles; the included angle between each water jet nozzle and the side wall of the ultrahigh pressure fluid pressure conversion device body is 90 degrees.
5. An ultrahigh-pressure fluid pressure conversion device as claimed in claim 2, wherein the front end of each water jet nozzle is provided with a coal rock breaking piece protruding outwards.
6. The ultrahigh-pressure fluid pressure conversion device as recited in claim 1, wherein the first sealing section comprises a first straight-shaft guiding section, a first O-ring, a first right-angle slip ring and a first inner cone sealing cone thread, wherein the first straight-shaft guiding section is provided with a ring groove, the first O-ring and the first right-angle slip ring are installed in the ring groove, and the rear end of the first straight-shaft guiding section is provided with the first inner cone sealing cone thread.
7. The ultrahigh-pressure fluid pressure conversion device as recited in claim 6, wherein the top of the first straight guiding section is provided with a first chamfer angle of 30-60 °.
8. The ultrahigh-pressure fluid pressure conversion device according to claim 1, wherein the second sealing section comprises a first outer cone sealing cone thread and a first inner cylindrical hole section which are arranged on the inner peripheral surface of the ultrahigh-pressure fluid pressure conversion device body and are arranged in sequence from the tail end to the front end.
9. The ultrahigh-pressure fluid pressure conversion device as recited in claim 1, wherein the front end of the compression spring abuts against a stepped surface of the stepped through hole of the ultrahigh-pressure fluid pressure conversion device body, and the rear end abuts against a front end surface of the positioning valve core.
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| CN202110584382.7A CN113323591B (en) | 2021-05-27 | 2021-05-27 | Ultrahigh-pressure fluid pressure conversion device |
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| CN113882855B (en) * | 2021-10-09 | 2024-04-26 | 中煤科工集团沈阳研究院有限公司 | Plug-in type high-low voltage accurate switching slotting machine, slotting device and use method |
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| CN113323591A (en) | 2021-08-31 |
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