CN113250618B - Screw rod switching-over formula booster in pit - Google Patents
Screw rod switching-over formula booster in pit Download PDFInfo
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- CN113250618B CN113250618B CN202110559165.2A CN202110559165A CN113250618B CN 113250618 B CN113250618 B CN 113250618B CN 202110559165 A CN202110559165 A CN 202110559165A CN 113250618 B CN113250618 B CN 113250618B
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- 238000005553 drilling Methods 0.000 claims abstract description 54
- 230000007246 mechanism Effects 0.000 claims abstract description 53
- 230000005540 biological transmission Effects 0.000 claims abstract description 25
- 238000001914 filtration Methods 0.000 claims abstract description 14
- 239000007788 liquid Substances 0.000 claims description 55
- 238000006243 chemical reaction Methods 0.000 claims description 44
- 239000012530 fluid Substances 0.000 claims description 37
- 230000000149 penetrating effect Effects 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 239000003208 petroleum Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 7
- 239000011435 rock Substances 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 239000003209 petroleum derivative Substances 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007363 ring formation reaction Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000007704 transition Effects 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets
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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
- E21B12/00—Accessories for drilling tools
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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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1078—Stabilisers or centralisers for casing, tubing or drill pipes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
- F03C2/00—Rotary-piston engines
- F03C2/30—Rotary-piston engines having the characteristics covered by two or more of groups F03C2/02, F03C2/08, F03C2/22, F03C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F03C2/304—Rotary-piston engines having the characteristics covered by two or more of groups F03C2/02, F03C2/08, F03C2/22, F03C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having both the movements defined in sub-group F03C2/08 or F03C2/22 and relative reciprocation between members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to a screw reversing type underground supercharger; belongs to the technical field of petroleum, shale gas and geothermal drilling tools. Comprises a filtering bypass assembly, a filtering safety assembly, a hydraulic assembly, a transmission assembly and a pressurizing assembly which are sequentially connected from top to bottom, wherein the pressurizing assembly comprises an upper shell, a connecting shell and a lower shell, one end of the connecting shell is provided with the upper shell in a threaded manner, the other end of the connecting shell is provided with the lower shell in a threaded manner, the interior of the upper shell is provided with a power connecting pipe through a righting mechanism, one end head of the power connecting pipe extends to the outer side of the upper shell and is in transmission connection with the transmission assembly, the other end head of the power connecting pipe extends into the connecting shell and is provided with a power mechanism, a flow limiting sleeve is clamped between the connecting shell and the lower shell below the power mechanism, and a pressurizing mechanism is clamped in the lower shell, the booster forms two booster cylinders high-pressure pulse jet by matching the power mechanism and the booster mechanism, has high jet frequency, effectively improves the drilling efficiency, and is very suitable for the drilling operation of deep wells and ultra-deep wells.
Description
Technical Field
The invention relates to a screw reversing type underground supercharger; belongs to the technical field of petroleum, shale gas and geothermal drilling tools.
Background
With the exploration and development of petroleum and natural gas resources to deep strata, the drilling technology of deep wells and ultra-deep wells becomes more important. Because the petroleum and natural gas of deep wells and ultra-deep wells are buried deeply and have complicated geology, the deep wells and ultra-deep wells are easy to encounter hard stratums in the drilling process, so that the problems of low drilling speed, long time consumption, high cost and the like are caused. Based on the above, in order to provide an efficient drilling method and save drilling cost, researchers at home and abroad carry out a great deal of experimental research, and the ultrahigh pressure jet technology combined with mechanical rock breaking is found to be a feasible and effective method for improving the mechanical drilling speed. Currently, two main ways to perform pressurization are surface pressurization (including full pressurization and partial pressurization) and downhole pressurization. The equipment and process used for ground pressurization are complex, the cost is high, and the application effect is greatly influenced by the well depth, so the acceleration effect is obvious, but the ground pressurization is not popularized and applied. The main advantage of underground pressurization is that the pressure of part of drilling fluid can be increased by installing a pressurization device in the drill string above the drill bit without changing the existing drilling process and equipment, so as to achieve the purpose of ultrahigh pressure jet flow auxiliary rock breaking.
The screw motor supercharging device has the advantages of simple structure, reliable supercharging and strong applicability, and is widely concerned and applied. The reversing mechanisms of the screw motor supercharging device realize power conversion through sliding contact among elements, and the existing reversing mechanisms comprise a spiral shifting fork reversing mechanism, a double-spiral groove type reversing mechanism, a slope type reversing mechanism and a sinusoidal curve cylindrical cam reversing mechanism, but the reversing mechanisms have some problems, or are uneven in stress, difficult to machine or large in impact load, the motion state of a driven part is greatly influenced by the speed of the driven part, the supercharging effect and the service life of a tool are influenced, and therefore improvement is needed.
Disclosure of Invention
The invention aims to: the screw reversing type underground supercharger has the advantages of simple structure, convenience in installation, reliability in transmission, long service life, high drilling efficiency, high supercharging frequency and obvious supercharging effect, and double hydraulic cylinders are used for supercharging.
The technical scheme of the invention is as follows:
the utility model provides a screw rod switching-over formula is booster in pit, is including the filtration bypass assembly that from top to bottom connects gradually, filters safety assembly, the assembly that surges, transmission assembly and pressure boost assembly, its characterized in that: the pressure boost assembly includes the casing, connects the casing, power connecting pipe, current-limiting sleeve, rights mechanism, power unit and booster mechanism down, connects casing one end screw and installs the casing, connects casing other end screw and installs casing down, go up the casing inside and be equipped with the power connecting pipe through right mechanism, power connecting pipe one end extends to the casing outside and is connected with the transmission assembly transmission, and power connecting pipe other end extends to in the connecting casing, extends to and is equipped with power unit on the power connecting pipe end in the connecting casing, clamps between the connecting casing of power unit below and the casing down and has the current-limiting sleeve, and the internal booster mechanism that has clamped of inferior valve, booster mechanism and power unit transmission are connected, and booster mechanism and current-limiting sleeve card dress are contradicted and are connected.
Righting the mechanism including fixed lock nut, bearing group and fender ring, bearing group suit is equipped with on the power connecting pipe that corresponds with last casing on the power connecting pipe of bearing group one end and keeps off the ring, keep off the ring and contradict with bearing group and be connected the casing respectively, it is spacing to keep off the ring formation to connect the casing, the threaded mounting has fixed lock nut on the power connecting pipe of the bearing group other end, fixed lock nut is contradicted with bearing group and is connected.
The power mechanism comprises a power conversion body, an embedding head and a limiting rod, the power conversion body is installed on the end of a power connecting pipe in a threaded mode, a ring cavity is arranged between the power conversion body and a connecting shell, the limiting rod is symmetrically arranged in the ring cavity, one end of the limiting rod is in pin connection with a righting mechanism, the other end of the limiting rod is fixedly connected with a current limiting sleeve, the limiting rod is sleeved with the embedding head in a sliding mode, and the embedding head is connected with the power conversion body in a sliding contact mode.
The power conversion body is in a circular truncated cone shape, a conversion body flow passage is arranged at the central position of the power conversion body, and a spiral groove is formed in the circumference of the power conversion body.
The embedding head is a cylinder with a convex-shaped section, a sliding hole is radially arranged on the embedding head, and the sliding hole is in sliding connection with the limiting rod in a matched mode.
The flow limiting sleeve is a cylinder with a T-shaped section, a liquid flow channel is arranged at the center of the flow limiting sleeve, the port of the liquid flow channel is horn-shaped, an inner boss is arranged inside the liquid flow channel, a filter cartridge is arranged on the inner boss, flow guiding holes are symmetrically arranged on the circumference of the flow limiting sleeve aligned with the filter cartridge in an inclined manner, and assembling holes are arranged on the flow limiting sleeve on the two sides of the liquid flow channel in a penetrating manner.
The supercharging mechanism comprises a supercharging sleeve, a connecting rod, a piston head, a one-way liquid inlet valve, a one-way liquid outlet valve and a piston seat, wherein the supercharging sleeve is arranged in a lower shell, the top of the supercharging sleeve is in abutting connection with a current-limiting sleeve, the bottom of the supercharging sleeve is in abutting connection with the lower shell, a drilling fluid flow channel is not arranged on the central position of the upper part of the supercharging sleeve in a penetrating manner, piston cavities are symmetrically arranged on the supercharging sleeve on two sides of the drilling fluid flow channel, the connecting rod is arranged in each piston cavity, one end of the connecting rod penetrates through the current-limiting sleeve and is fixedly connected with a power mechanism, the piston head is arranged on the other end of the connecting rod and is in sliding contact connection with the piston cavity, the one-way liquid inlet valve is arranged in the piston head, the one-way liquid outlet valve is fixedly arranged at the bottom of the piston cavity below the one-way liquid inlet valve through the piston seat, a high-pressure flow channel is arranged on the lower part of the supercharging sleeve and is communicated with the piston cavities, and low-pressure flow channels are symmetrically arranged on the supercharging sleeves on two sides of the high-pressure flow channel, the low pressure flow passage is communicated with the drilling fluid flow passage.
The cross section of the high-pressure flow passage is Y-shaped, and the cross section of the low-pressure flow passage is L-shaped.
The piston head is cylindrical, a stepped round table is arranged at the top end of the piston head, a bypass hole radially penetrates through the circumference of the round table, a piston hole is not formed in the center of the lower portion of the piston head in a penetrating mode, the piston hole is a diameter-variable hole, and the piston hole is communicated with the bypass hole.
Compared with the prior art, the invention has the beneficial effects that:
the screw reversing type underground supercharger works by mutually matching a fixed locking nut, a bearing group and a baffle ring in a centering mechanism, centering a power connecting pipe to effectively ensure that the power connecting pipe rotates along a fixed shaft of a central axis, and mutually matching a pressurizing sleeve, a power conversion body, an embedding head, a pressurizing sleeve, a connecting rod, a piston head, a one-way liquid inlet valve and a one-way liquid outlet valve to form two pressurizing cylinders, so that high-pressure pulse jet is formed, the jet frequency is high, and the drilling efficiency is effectively improved; install the cartridge filter in this booster, effectively prevent in the drilling fluid granule such as detritus from getting into the pressure boost cylinder, reduce the wearing and tearing to piston head, check valve, piston seat and pressure boost cavity and nozzle. The supercharger has the advantages of simple structure, convenient installation, reliable transmission and long service life, and is very suitable for the drilling operation of deep wells and ultra-deep wells.
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 an enlarged view of the structure at B in FIG. 1;
FIG. 4 is a schematic cross-sectional view of the flow restricting sleeve of the present invention;
FIG. 5 is a schematic cross-sectional view of a power conversion body according to the present invention;
FIG. 6 is a schematic perspective view of FIG. 5;
FIG. 7 is a schematic cross-sectional view of a pressure increasing sleeve according to the present invention;
FIG. 8 is a schematic cross-sectional view taken along line C-C of FIG. 7;
FIG. 9 is a schematic cross-sectional view of the assembled lower housing and plenum housing of the present invention;
fig. 10 is a schematic structural diagram of the working state of the present invention.
In the figure: 1. an upper housing; 2. connecting the shell; 3. a lower housing; 4. a power connecting pipe; 5. a flow limiting sleeve; 6. a pressurizing sleeve; 7. fixing a locking nut; 8. a bearing set; 9. a baffle ring; 10. a power conversion body; 11. an embedding head; 12. a limiting rod; 13. a transition body flow passage; 14. a helical groove; 15. a ring cavity; 16. a flow channel; 17. a filter cartridge; 18. a flow guide hole; 19. an assembly hole; 20. an outer boss; 21. a connecting rod; 22. a piston head; 23. a one-way liquid inlet valve; 24. a one-way drain valve; 25. a piston seat; 26. a drilling fluid flow passage; 27. a piston cavity; 28. a bypass orifice; 29. a piston bore; 30. a liquid inlet flow channel; 31. a high-pressure flow passage; 32. a low-pressure flow passage; 33. a filtration bypass assembly; 34. a filtration safety assembly; 35. a hydraulic assembly; 36. a transmission assembly.
Detailed Description
As shown in figures 1-10
The screw reversing type underground supercharger comprises a filtering bypass assembly 33, a filtering safety assembly 34, a hydraulic assembly 35, a transmission assembly 36 and a supercharging assembly which are connected in sequence from top to bottom through self-locking conical threads.
The supercharging assembly of the screw reversing type underground supercharger comprises an upper shell 1, a connecting shell 2, a lower shell 3, a power connecting pipe 4, a flow limiting sleeve 5, a supercharging sleeve 6, a righting mechanism, a power mechanism and a supercharging mechanism, wherein limiting bosses are respectively arranged on the inner walls of the upper shell 1, the connecting shell 2 and the lower shell 3.
An upper shell 1 is installed at one end of a connecting shell 2 through threads, a lower shell 3 is installed at the other end of the connecting shell 2 through threads, a power connecting pipe 4 is installed inside the upper shell 1 through a righting mechanism, the righting mechanism comprises a fixed locking nut 7, a bearing group 8 and a baffle ring 9, the bearing group 8 is sleeved on the power connecting pipe 4 corresponding to the upper shell 1, the power connecting pipe 4 at one end of the bearing group 8 is sleeved with the baffle ring 9, the baffle ring 9 is annular, the baffle ring 9 is respectively connected with the bearing group 8 and the connecting shell 2 in an abutting mode, a limit is formed on the baffle ring 9 at the end of the connecting shell 2, the baffle ring 9 is tightly attached to the bottom end of the bearing group 8, the baffle ring 9 aims to support the bearing group 8, a fixed locking nut 7 is installed on the power connecting pipe 4 at the other end of the bearing group 8 through threads, the fixed locking nut 7 is connected with the bearing group 8 in an abutting mode during work, the bearing set 8 is positioned on the power connecting pipe 4 through the connecting shell 2, the baffle ring 9 and the fixed locking nut 7.
The spacing boss of going up casing 1 inner wall forms spacingly to bearing group 8 top, from this to bearing group 8 formation protection, avoids fixed lock nut 7 pine to take off the back, and bearing group 8 is worn out from last casing 1 top.
One end of the power connecting pipe 4 extends to the outside of the upper casing 1 to be in transmission connection with the transmission assembly 36, and the bearing set 8 aims to right the power connecting pipe 4 so as to convert the eccentric motion formed by the motor rotor into the fixed-axis rotation of the power connecting pipe 4 along the central axis through a cardan shaft in the transmission assembly 36.
The other end of the power connecting pipe 4 extends into the connecting shell 2, a power mechanism is arranged on the end of the power connecting pipe 4 extending into the connecting shell 2, a flow limiting sleeve 5 is clamped between the connecting shell 2 and the lower shell 3 below the power mechanism, the power mechanism comprises a power conversion body 10, an embedding head 11 and a limiting rod 12, the power conversion body 10 is in a circular truncated cone shape, a conversion body flow passage 13 is arranged at the center of the power conversion body 10, the power conversion body 10 is installed on the end of the power connecting pipe 4 in a threaded mode, the conversion body flow passage 13 is communicated with the center hole of the power connecting pipe 4, and a spiral groove 14 is formed in the circumference of the power conversion body 10.
A ring cavity 15 is arranged between the power conversion body 10 and the connecting shell 2, limiting rods 12 are symmetrically arranged in the ring cavity 15 along the axial direction of the power conversion body 10, one end of each limiting rod 12 is connected with a blind hole pin on the baffle ring 9 in the righting mechanism, the other ends of the limiting rods 12 are fixedly connected with the flow limiting sleeve 5 through matching of threaded heads and threaded blind holes, each embedding head 11 is a cylinder with a convex-shaped cross section, a sliding hole is radially formed in each embedding head 11, an embedding head 11 is arranged on each limiting rod 12, each embedding head 11 is connected with the corresponding limiting rod 12 through the corresponding sliding hole in a matched sliding mode, and a boss of each embedding head 11 is connected with a spiral groove 14 of the power conversion body 10 in a matched sliding contact mode.
The flow limiting sleeve 5 is a cylinder with a T-shaped section, a flange of the flow limiting sleeve 5 is matched and clamped with a limiting boss of the connecting shell 2, and a port of the lower shell 3 limits the flange of the flow limiting sleeve 5, so that the flow limiting sleeve 5 is positioned between the connecting shell 2 and the lower shell 3.
A liquid flow channel 16 is arranged at the central position of the flow limiting sleeve 5, one end port of the liquid flow channel 16 is horn-shaped, the liquid flow channel 16 of the flow limiting sleeve 5 which is horn-shaped is matched and butted with the end of the power conversion body 10 which is round table-shaped, the conversion body flow channel 13 of the power conversion body 10 is communicated with the liquid flow channel 16 of the flow limiting sleeve 5, and the purpose is that: the drilling fluid in the conversion body flow passage 13 of the power conversion body 10 can conveniently flow into the fluid flow passage 16 of the flow limiting sleeve 5, and the drilling fluid is prevented from leaking into an annular space between the power conversion body 10 and the connecting shell 2 to influence the movement of the embedding head 11.
An inner boss is arranged inside a flow passage 16 of the flow limiting sleeve 5, a filter cartridge 17 is installed on the inner boss, the filter cartridge 17 aims to prevent particles such as rock debris in drilling fluid from entering the pressurizing sleeve 6, abrasion to internal structures such as a piston head 22, a piston seat 25, a pressurizing cavity, a one-way liquid inlet valve 23 and a one-way liquid outlet valve 24 is reduced, flow guiding holes 18 are symmetrically arranged on the circumference of the flow limiting sleeve 5 aligned with the filter cartridge 17 in an inclined mode, the flow guiding holes 18 are used for guiding part of the drilling fluid to flow into a cavity between the flow limiting sleeve 5 and the lower shell 3, the flow guiding holes 18 are communicated with the flow passage 16, assembling holes 19 are formed in the flow limiting sleeve 5 on the two sides of the flow passage 16 in a penetrating mode, and an outer boss 20 is arranged on the circumference of the flow limiting sleeve 5 below the flow guiding holes 18.
The booster mechanism is clamped in the lower shell 3 and comprises a booster sleeve 6, a connecting rod 21, a piston head 22, a one-way liquid inlet valve 23, a one-way liquid discharge valve 24 and a piston seat 25, the booster sleeve 6 is arranged in the lower shell 3, a drilling fluid flow channel 26 is not arranged on the central position of the upper portion of the booster sleeve 6 in a penetrating mode, an inner boss is arranged inside the drilling fluid flow channel 26, the top end of the booster sleeve 6 is connected with an outer boss 20 of the flow limiting sleeve 5 in an abutting mode, the bottom end of the flow limiting sleeve 5 is connected with the inner boss of the booster sleeve 6 in an abutting mode, and the drilling fluid flow channel 26 of the booster sleeve 6 is correspondingly communicated with the liquid flow channel 16 of the flow limiting sleeve 5.
A one-way liquid inlet valve 23 is fixedly installed in a piston hole 29 of the piston head 22, a piston seat 25 is fixedly installed at the bottom of a piston cavity 27 below the one-way liquid inlet valve 23, a liquid inlet flow passage 30 is arranged at the center of the piston seat 25, the liquid inlet flow passage 30 is a reducing hole, a one-way liquid discharge valve 24 is fixedly installed in the liquid inlet flow passage 30 of the piston seat 25, the one-way liquid inlet valve 23 and the one-way liquid discharge valve 24 are identical in structure and respectively comprise a cone valve core, a spring, a retainer ring and a spring seat, the cone valve core, the spring and the spring seat are sequentially installed in the piston hole 29 of the piston head 22 and the liquid inlet flow passage 30 of the piston seat 25 from top to bottom respectively, each spring seat is respectively matched and fixedly connected with the piston hole 29 of the piston head 22 and the liquid inlet flow passage 30 of the piston seat 25, and the retainer ring is arranged on the excircle of the spring seat.
The lower part of the pressurizing sleeve 6 is provided with a high-pressure flow passage 31, the section of the high-pressure flow passage 31 is Y-shaped, the high-pressure flow passage 31 is communicated with the piston cavity 27 of the pressurizing sleeve 6, the pressurizing sleeve 6 at the two sides of the high-pressure flow passage 31 is symmetrically provided with low-pressure flow passages 32, the sections of the low-pressure flow passages 32 are L-shaped, and the low-pressure flow passages 32 are communicated with the drilling fluid flow passage 26 of the pressurizing sleeve 6.
The upper shell 1 of the screw reversing type underground supercharger is fixedly connected with the shell of a transmission assembly 36 through self-locking conical threads, the power connecting pipe 4 of the supercharger is in threaded connection with a hinged cap of the transmission assembly 36, and a drill bit is installed on the lower shell 6 of the screw reversing type underground supercharger in a threaded mode.
High-pressure drilling fluid is introduced into the screw reversing type underground supercharger during working, firstly, solid particles harmful to a motor in the high-pressure drilling fluid are effectively removed by the high-pressure drilling fluid through the filtering bypass assembly 33, the filtered high-pressure drilling fluid enters the filtering safety assembly 34, and the filtering safety assembly 34 not only meets the safe and efficient working of the supercharger, but also has the functions of slurry filtering and pressure reduction of an adjustable nozzle.
High-pressure drilling fluid enters the hydraulic assembly 35 through the filtering safety assembly 34, and when the high-pressure drilling fluid passes between the spiral stator on the inner wall of the hydraulic body and the spiral rotor on the outer wall of the hydraulic core, the hydraulic core is driven to rotate, the hydraulic assembly 35 provides a power source for the supercharger, the hydraulic core is in threaded connection with a hinged cap of the transmission assembly 36, because the power connecting pipe 4 of the supercharger is in threaded connection with the hinged cap of the transmission assembly 36, the hydraulic core drives the power connecting pipe 4 of the supercharger to synchronously rotate through the hinged cap of the transmission assembly 36, in the process, the high-pressure drilling fluid in the hollow layer in the shell of the transmission assembly 36 enters the central hole of the power connecting pipe 4 through the bypass hole of the hinged cap, and flows into the conversion body flow passage 13 of the power conversion body 10, the liquid flow passage 16 of the flow limiting sleeve 5 and the drilling fluid flow passage 26 of the pressure increasing sleeve 6 in sequence along the axial direction from the central hole of the power connecting pipe 4.
In the process that the power connecting pipe 4 rotates, the bearing group 8 of the centering mechanism effectively ensures that the power connecting pipe 4 rotates in a fixed shaft mode, the power conversion body 10 is in threaded connection with the power connecting pipe 4, therefore, the power connecting pipe 4 and the power conversion body 10 rotate in a synchronous fixed shaft mode, the boss of the embedding head 11 is inserted into the spiral groove 14 in the outer wall of the power conversion body 10, the embedding head 11 forms a limiting state under the mutual matching of the connecting rod 21 and the limiting rod 12, and the embedding head 11 and the spiral groove 14 of the power conversion body 10 can slide relatively under the rotation of the fixed shaft of the power conversion body 10, so that the embedding head 11 can reciprocate up and down along the axial direction of the limiting rod 12.
Since the insertion head 11, the connecting rod 21, and the piston head 22 are sequentially screwed, the insertion head 11 reciprocates the piston head 22 up and down in the piston chamber 27 of the booster sleeve 6 via the connecting rod 21.
When high-pressure drilling fluid flows into the fluid flow channel 16 of the flow limiting sleeve 5, part of the high-pressure drilling fluid flows into a cavity between the flow limiting sleeve 5 and the lower shell 3 through the flow guide holes 18 of the flow limiting sleeve 5 after being filtered by the filter cartridge 17, the cavity between the flow limiting sleeve 5 and the lower shell 3 is communicated with the piston cavity 27 of the pressurizing sleeve 6, when the piston head 22 moves upwards, the volume of the cavity between the flow limiting sleeve 5 and the lower shell 3 is reduced, the pressure is increased, negative pressure is formed in the piston cavity 27 between the one-way liquid inlet valve 23 and the one-way liquid outlet valve 24, after the high-pressure drilling fluid passes through the bypass hole 28 and the piston hole 29 of the piston head 22, the one-way liquid inlet valve 23 is in an open state, and the piston cavity 27 between the one-way liquid inlet valve 23 and the one-way liquid outlet valve 24 sucks the high-pressure drilling fluid.
When the piston head 22 moves downwards, the volume of the piston cavity 27 between the one-way liquid inlet valve 23 and the one-way liquid outlet valve 24 is reduced, the pressure is increased, the one-way liquid inlet valve 23 is closed, the one-way liquid outlet valve 24 is opened, the piston head 22 pressurizes the high-pressure drilling liquid entering the piston cavity 27, the pressurized drilling liquid can spray ultrahigh-pressure jet from a high-pressure nozzle of a drill bit through the high-pressure flow passage 31, because the two piston heads 22 reciprocate up and down alternately, a pulse type high-pressure fluid branch is generated through the high-pressure flow passage 31 to carry out auxiliary rock breaking so as to achieve the purpose of breaking rock and improving the drilling speed, and most of the rest drilling fluid is sprayed out from the low-pressure nozzle of the drill bit through the low-pressure flow passage 32 by the drilling fluid flow passage 26 of the pressurizing sleeve 6 to achieve the purposes of cleaning the well bottom and cooling the drill bit, and the high-pressure drilling fluid returns to the ground through the annular layer of the pressurizing device, so that the whole screw reversing type underground pressurizing device drilling operation is completed.
In the work of the screw reversing type underground supercharger, the power connecting pipe 4 is straightened through the mutual matching of the fixed locking nut 7, the bearing group 8 and the baffle ring 9 in the righting mechanism, the fixed shaft rotation of the power connecting pipe 4 along the central axis is effectively ensured, two boosting cylinders are formed through the mutual matching of the boosting sleeve 6, the power conversion body 10, the embedding head 11, the boosting sleeve 6, the connecting rod 21, the piston head 22, the one-way liquid inlet valve 23 and the one-way liquid outlet valve 24, high-pressure pulse jet flow is formed, the jet flow frequency is high, and the drilling efficiency is effectively improved; the filter cartridge 17 is arranged in the booster, so that particles such as rock debris in drilling fluid can be effectively prevented from entering the booster cylinder, and abrasion to the piston head 22, the one-way valve, the piston seat 25, the boosting cavity and the nozzle can be reduced. The supercharger has the advantages of simple structure, convenient installation, reliable transmission and long service life, and is very suitable for the drilling operation of deep wells and ultra-deep wells.
Claims (7)
1. A screw reversing type underground supercharger comprises a filtering bypass assembly (33), a filtering safety assembly (34), a hydraulic assembly (35), a transmission assembly (36) and a supercharging assembly which are sequentially connected from top to bottom, wherein the supercharging assembly comprises an upper shell (1), a connecting shell (2), a lower shell (3), a power connecting pipe (4), a flow limiting sleeve (5), a supercharging sleeve (6), a righting mechanism, a power mechanism and a supercharging mechanism, the upper shell (1) is installed at one end of the connecting shell (2) in a threaded manner, the lower shell (3) is installed at the other end of the connecting shell (2) in a threaded manner, a power connecting pipe (4) is installed inside the upper shell (1) through the righting mechanism, one end of the power connecting pipe (4) extends to the outer side of the upper shell (1) to be in transmission connection with the transmission assembly (36), and the other end of the power connecting pipe (4) extends into the connecting shell (2), a power mechanism is arranged on the end of a power connecting pipe (4) extending into the connecting shell (2), a flow limiting sleeve (5) is clamped between the connecting shell (2) and the lower shell (3) below the power mechanism, a supercharging mechanism is clamped in the lower shell (3), the supercharging mechanism is in transmission connection with the power mechanism, and the supercharging mechanism is in clamping and abutting connection with the flow limiting sleeve (5); it is characterized in that; the supercharging mechanism comprises a supercharging sleeve (6), a connecting rod (21), a piston head (22), a one-way liquid inlet valve (23), a one-way liquid outlet valve (24) and a piston seat (25), wherein the supercharging sleeve (6) is arranged in a lower shell (3), the top of the supercharging sleeve (6) is in abutting connection with a flow limiting sleeve (5), the bottom of the supercharging sleeve (6) is in abutting connection with the lower shell (3), a drilling fluid flow channel (26) is not arranged at the central position of the upper part of the supercharging sleeve (6) in a penetrating way, piston cavities (27) are symmetrically arranged on the supercharging sleeve (6) at the two sides of the drilling fluid flow channel (26), the connecting rod (21) is arranged in each piston cavity (27), one end of the connecting rod (21) penetrates through the flow limiting sleeve (5) and is fixedly connected with a power mechanism, the piston head (22) is arranged at the other end of the connecting rod (21), the piston head (22) is in sliding contact connection with the piston cavities (27), the one-way liquid inlet valve (23) is arranged in the piston head (22), a one-way liquid discharge valve (24) is fixedly arranged at the bottom of a piston cavity (27) below the one-way liquid inlet valve (23) through a piston seat (25), a high-pressure flow passage (31) is arranged at the lower part of the pressurizing sleeve (6), the high-pressure flow passage (31) is communicated with the piston cavity (27), low-pressure flow passages (32) are symmetrically arranged on the pressurizing sleeve (6) at two sides of the high-pressure flow passage (31), and the low-pressure flow passages (32) are communicated with a drilling fluid flow passage (26); the piston head (22) is cylindrical, a step-shaped circular truncated cone is arranged at the top end of the piston head (22), a bypass hole (28) radially penetrates through the circumference of the circular truncated cone, a piston hole (29) is not formed in the center of the lower portion of the piston head (22) in a penetrating mode, the piston hole (29) is a reducing hole, and the piston hole (29) is communicated with the bypass hole (28).
2. The screw reversing type downhole booster of claim 1, wherein: righting the mechanism including fixed lock nut (7), bearing group (8) and fender ring (9), bearing group (8) suit is on power connecting pipe (4) that correspond with last casing (1), the cover is equipped with fender ring (9) on power connecting pipe (4) of bearing group (8) one end, keep off ring (9) and organize (8) with the bearing respectively and be connected with being connected casing (2) conflict, it is spacing to keeping off ring (9) formation in connecting casing (2), fixed lock nut (7) are installed to the screw thread on power connecting pipe (4) of the bearing group (8) other end, fixed lock nut (7) are contradicted with bearing group (8) and are connected.
3. The screw reversing downhole booster of claim 1, wherein: the power mechanism comprises a power conversion body (10), an embedding head (11) and a limiting rod (12), wherein the power conversion body (10) is arranged on the end of a power connecting pipe (4) in a threaded mode, a ring cavity (15) is arranged between the power conversion body (10) and a connecting shell (2), the limiting rod (12) is symmetrically arranged in the ring cavity (15), one end of the limiting rod (12) is connected with a righting mechanism in a pin mode, the other end of the limiting rod (12) is fixedly connected with a flow limiting sleeve (5), the embedding head (11) is sleeved on the limiting rod (12) in a sliding mode, and the embedding head (11) is connected with the power conversion body (10) in a matched sliding contact mode.
4. A screw reversing downhole booster as claimed in claim 3, wherein: the power conversion body (10) is in a circular truncated cone shape, a conversion body flow passage (13) is arranged at the center of the power conversion body (10), and a spiral groove (14) is arranged on the circumference of the power conversion body (10).
5. A screw reversing downhole booster according to claim 3, wherein: the embedding head (11) is a cylinder with a convex-shaped section, a sliding hole is radially arranged on the embedding head (11), and the sliding hole is matched and slidably connected with the limiting rod (12).
6. The screw reversing downhole booster of claim 1, wherein: the flow limiting sleeve (5) is a cylinder with a T-shaped section, a liquid flow channel (16) is arranged at the central position of the flow limiting sleeve (5), the port of the liquid flow channel (16) is horn-shaped, an inner boss is arranged inside the liquid flow channel (16), a filter cartridge (17) is arranged on the inner boss, guide holes (18) are symmetrically arranged on the circumference of the flow limiting sleeve (5) aligned with the filter cartridge (17) in an inclined manner, and assembling holes (19) penetrate through the flow limiting sleeve (5) on the two sides of the liquid flow channel (16).
7. The screw reversing downhole booster of claim 1, wherein: the section of the high-pressure flow passage (31) is Y-shaped, and the section of the low-pressure flow passage (32) is L-shaped.
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| CN202110559165.2A CN113250618B (en) | 2021-05-21 | 2021-05-21 | Screw rod switching-over formula booster in pit |
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| CN202110559165.2A CN113250618B (en) | 2021-05-21 | 2021-05-21 | Screw rod switching-over formula booster in pit |
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| RU2287118C1 (en) * | 2005-10-05 | 2006-11-10 | Общество с ограниченной ответственностью "Новые энергосберегающие технологии" | Method for liberation of energy by means of rotary-translational motion of liquid and device for conversion and liberation of energy in liquid media |
| CN104141457A (en) * | 2013-05-07 | 2014-11-12 | 中国石油大学(华东) | Well drilling pressurizing speed-up device |
| CN103452482B (en) * | 2013-09-12 | 2014-06-11 | 中国石油大学(北京) | Bevel gear set reversing underground pulse jet supercharging device |
| CN107401383A (en) * | 2017-09-04 | 2017-11-28 | 长江大学 | A kind of underground pressurizing device |
| CN107355182B (en) * | 2017-09-15 | 2023-06-30 | 长江大学 | Turbine type high-frequency pulse supercharger |
| CA3037025A1 (en) * | 2018-04-27 | 2019-10-27 | China Petroleum & Chemical Corporation | Downhole auxiliary drilling apparatus |
| CN111677438A (en) * | 2020-03-24 | 2020-09-18 | 江苏航天鸿鹏数控机械有限公司 | High-pressure jet power tool for drilling in ground mine, petroleum, petrochemical and coal bed gas |
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