CN115283726A - Small-size hydraulic drilling equipment with pressure - Google Patents
Small-size hydraulic drilling equipment with pressure Download PDFInfo
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- CN115283726A CN115283726A CN202211117559.3A CN202211117559A CN115283726A CN 115283726 A CN115283726 A CN 115283726A CN 202211117559 A CN202211117559 A CN 202211117559A CN 115283726 A CN115283726 A CN 115283726A
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- connecting plate
- way pipe
- chain wheel
- lower connecting
- main shaft
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B41/00—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B47/00—Constructional features of components specially designed for boring or drilling machines; Accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
- B23Q5/02—Driving main working members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L41/00—Branching pipes; Joining pipes to walls
- F16L41/04—Tapping pipe walls, i.e. making connections through the walls of pipes while they are carrying fluids; Fittings therefor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to the technical field of pressurized operation equipment, and discloses small hydraulic pressurized drilling equipment which comprises a drill rod, a main shaft, a first connecting part, a second connecting part and a feeding driving mechanism, wherein the drill rod is arranged at the front end of the main shaft, the first connecting part comprises a left upper connecting plate, a left lower connecting plate, a left three-way pipe and a hoop which are sequentially arranged and internally communicated, a communication port communicated with the left three-way pipe is arranged on the hoop, and the second connecting part comprises a right upper connecting plate, a right lower connecting plate, a right three-way pipe and a high-pressure protective pipe which are sequentially arranged and internally communicated; the invention provides small hydraulic drilling equipment with pressure, which solves the problems that the existing design structure is complex in design and high in cost, and parts are damaged in the later period, so that the maintenance and the replacement are extremely inconvenient.
Description
Technical Field
The invention relates to the technical field of pressurized operation equipment, in particular to small-sized hydraulic pressurized drilling equipment.
Background
After years of exploitation, gate valves of well heads of large-scale production wells have the conditions of corrosion, leakage, untight closing and the like, and have huge well control and environmental protection risks; some old wells without production capacity are in a well shut-in state for a long time, gate valves are seriously corroded and cannot be opened or closed, the pressure in the wells is unknown, and great threats are caused to the personal and property safety of people around the wells.
Aiming at the problems, the traditional treatment mode is killing the well firstly, but the killing operation period is long, the construction cost is high, the environmental protection problem in the recovery process of the killing fluid is prominent, and the reservoir damage is large. And for the condition of serious corrosion of the well head, the gate valve can not be opened or replaced by adopting a common mode, and the leakage is easily generated to cause the out-of-control of the well head, so that the well head needs to be treated by adopting a mode with pressure.
The pressurized drilling technology is a technology for building a pressure relief or circulation channel by utilizing a pressurized drilling device to drill a gate valve or a pipe column of a pressurized oil-gas well wellhead device under the condition that a wellhead is pressurized. The existing pressure drilling equipment is searched, for example, the Chinese utility model has the patent application number of CN200520092064.5 and the patent name of the pressure drilling machine, the pressure drilling machine adopts multi-gear transmission to realize the rotation and the movement of a driving main shaft, the structural design is complex, the cost is high, and the later stage is inconvenient if the damage of parts occurs.
Disclosure of Invention
The invention aims to provide a small hydraulic drilling device with pressure, which is used for solving at least one of the problems in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a small hydraulic drilling device with pressure comprises a drill rod, a main shaft, a first connecting part, a second connecting part and a feeding driving mechanism, wherein the drill rod is installed at the front end of the main shaft, the first connecting part comprises a left upper connecting plate, a left lower connecting plate, a left three-way pipe and a hoop which are sequentially arranged and are internally communicated, a communication port communicated with the left three-way pipe is formed in the hoop, and the second connecting part comprises a right upper connecting plate, a right lower connecting plate, a right three-way pipe and a high-pressure protection pipe which are sequentially arranged and are internally communicated;
the feeding driving mechanism comprises a motor, a transmission mechanism, a screw rod, a connecting rod, a nut seat and a middle connecting plate, the connecting rod is fixedly arranged between the upper left connecting plate and the upper right connecting plate, two ends of the screw rod are respectively and rotatably connected with the lower left connecting plate and the lower right connecting plate, one end of the screw rod, extending out of the lower right connecting plate, is a rotating driving end, the nut seat is in threaded fit with the screw rod, the motor is fixedly arranged on the nut seat, the motor drives the spindle to rotate through the transmission mechanism, the transmission mechanism comprises a first chain wheel, a second chain wheel and a chain, the first chain wheel is fixedly arranged at the driving end of the motor, the second chain wheel is fixedly arranged on the spindle, the chain is respectively connected with the first chain wheel and the second chain wheel, the first end of the middle connecting plate is fixedly connected with the nut seat, the second end of the middle connecting plate is in rotating fit with the spindle, and the second end of the middle connecting plate is rotatably connected with the second chain wheel;
the main shaft sequentially penetrates through the left three-way pipe, the left lower connecting plate, the left upper connecting plate, the right lower connecting plate, the right three-way pipe and the high-pressure protective pipe, the end part of the high-pressure protective pipe is a closed end, the left three-way pipe is communicated with the right three-way pipe through an external balance pipeline, high-pressure sealing pieces are arranged between the left lower connecting plate and the main shaft and between the right lower connecting plate and the main shaft, and the main shaft is in sliding fit with the left lower connecting plate and the right lower connecting plate respectively.
In the technical scheme, the drill bit is driven to rotate by the motor, and the footage is realized by driving the screw rod to rotate. Specifically, the motor drives the first chain wheel to rotate, the first chain wheel drives the second chain wheel to rotate through the chain, the second chain wheel is fixedly mounted on the spindle, the second chain wheel drives the spindle to rotate, meanwhile, one end, extending out of the lower right connecting plate, of the screw rod is a rotary driving end, the screw rod is driven through the rotary driving end, the nut seat is in threaded fit with the screw rod, the first end of the middle connecting plate is fixedly connected with the nut seat, the second end of the middle connecting plate is in rotational fit with the spindle, the nut seat drives the middle connecting plate to move when the screw rod rotates, due to the fact that the second end of the middle connecting plate is in rotational connection with the second chain wheel, linear driving on the second chain wheel is achieved in the moving process of the middle connecting plate, linear driving on the spindle is achieved at the same time, the spindle can be fed and retracted when rotating, and accordingly the effect of drilling under pressure is achieved. Compared with the existing design, the drilling tool is simple in structure, low in cost, convenient to use, easy to maintain, capable of feeding the rod stably and fast, and high in drilling efficiency.
Furthermore, the cambered surface sealing block is arranged at the communication port, the design of the sealing structure solves the problem of curved surface high-pressure sealing of the tubular column, the requirement of pressurized drilling of the tubular column with the pressure of 70MPa is met, the high-pressure sealing element is a V-shaped cloth clamping sealing ring, the problem of high-pressure dynamic sealing of the main shaft is solved by utilizing multiple V-shaped cloth clamping sealing rings, and the working pressure can reach 105MPa.
Furthermore, in order to conveniently realize the installation between the left lower connecting plate and the left three-way pipe and the installation between the right lower connecting plate and the right three-way pipe, the left lower connecting plate is in threaded connection with the left three-way pipe, and the right lower connecting plate is in threaded connection with the right three-way pipe.
Furthermore, in order to conveniently realize the rotating fit between the middle connecting plate and the main shaft, a connecting sleeve is arranged at the second end of the middle connecting plate, the connecting sleeve is rotatably matched with the main shaft, and the connecting sleeve is rotatably connected with the second chain wheel.
Furthermore, in order to conveniently realize the coaxial rotating fit between the connecting sleeve and the main shaft, an annular groove is arranged on the connecting sleeve, and the central shaft of the second chain wheel is positioned in the annular groove and is rotatably connected with the annular groove.
Furthermore, in order to ensure the smoothness of rotation between the connecting sleeve and the main shaft and improve the axial supporting effect, a rotating bearing is arranged between the connecting sleeve and the main shaft, and a pressure bearing is arranged between the central shaft and the annular groove.
Further, in order to reduce the volume of the device as much as possible, the connecting rod is positioned right above the screw.
Furthermore, in order to facilitate the rotation of the manual operation screw rod, the rotary driving end is provided with a ruler feeding rod for driving the screw rod to rotate.
Furthermore, in order to realize the fixed installation of the motor, a fixed seat is arranged on the nut seat, and the motor is fixedly installed on the fixed seat.
Furthermore, in order to realize pressure relief of the left three-way pipe and/or the right three-way pipe, the left three-way pipe and/or the right three-way pipe are/is connected with a plug valve.
The beneficial effects of the invention are as follows: in the technical scheme, the drill bit is driven to rotate by the motor, and the footage is realized by driving the screw rod to rotate. Specifically, the motor drives the first chain wheel to rotate, the first chain wheel drives the second chain wheel to rotate through the chain, the second chain wheel is fixedly mounted on the spindle, the second chain wheel drives the spindle to rotate, meanwhile, one end, extending out of the lower right connecting plate, of the screw rod is a rotary driving end, the screw rod is driven through the rotary driving end, the nut seat is in threaded fit with the screw rod, the first end of the middle connecting plate is fixedly connected with the nut seat, the second end of the middle connecting plate is in rotational fit with the spindle, the nut seat drives the middle connecting plate to move when the screw rod rotates, due to the fact that the second end of the middle connecting plate is in rotational connection with the second chain wheel, linear driving on the second chain wheel is achieved in the moving process of the middle connecting plate, linear driving on the spindle is achieved at the same time, the spindle can be fed and retracted when rotating, and accordingly the effect of drilling under pressure is achieved. Compared with the prior art, the drilling tool is simple in structure, low in cost, convenient to use, easy to maintain, capable of feeding the ruler by screw transmission, stable in screw feeding, high in speed and high in drilling efficiency.
Drawings
FIG. 1 is a schematic front view of the present invention;
FIG. 2 isbase:Sub>A schematic cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a schematic view of a portion of the enlarged structure at A in FIG. 2;
fig. 4 is a partially enlarged structural diagram of a portion B in fig. 2.
In the figure: a drill rod 1; a main shaft 2; a left upper connecting plate 3; a left lower connecting plate 4; a hoop 5; a communication port 6; a right upper connecting plate 7; a right lower connecting plate 8; a right three-way pipe 9; a high-pressure protection pipe 10; a motor 11; a screw 12; a connecting rod 13; a nut seat 14; an intermediate connection plate 15; a first sprocket 16; a second sprocket 17; a chain 18; an external balance pipeline 19; a cambered surface sealing block 20; a V-shaped cloth clamping seal ring 21; a connecting sleeve 22; an annular groove 23; a central shaft 24; a rotary bearing 25; a pressure bearing 26; a tape feed bar 27; a fixed seat 28; a plug valve 29; a left tee 30.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be briefly described below with reference to the accompanying drawings and the embodiments or the description in the prior art, it is obvious that the following description of the structure of the drawings is only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts. It should be noted that the description of the embodiments is provided to help understanding of the present invention, and the present invention is not limited thereto.
Example 1:
as shown in fig. 1-4, the embodiment provides a small hydraulic drilling device with pressure, which includes a drill rod 1, a main shaft 2, a first connecting portion, a second connecting portion and a feeding driving mechanism, wherein the drill rod 1 is installed at the front end of the main shaft 2, the first connecting portion includes a left upper connecting plate 3, a left lower connecting plate 4, a left three-way pipe 30 and a hoop 5 which are sequentially arranged and internally communicated, a communicating port 6 communicated with the left three-way pipe 30 is arranged on the hoop 5, the drill rod 1 extends into the hoop 5 from the communicating port 6, and the second connecting portion includes a right upper connecting plate 7, a right lower connecting plate 8, a right three-way pipe 9 and a high-pressure protection pipe 10 which are sequentially arranged and internally communicated;
the feeding driving mechanism comprises a motor 11, a transmission mechanism, a screw 12, a connecting rod 13, a nut seat 14 and a middle connecting plate 15, the connecting rod 13 is fixedly arranged between the upper left connecting plate 3 and the upper right connecting plate 7, two ends of the screw 12 are respectively and rotatably connected with the lower left connecting plate 4 and the lower right connecting plate 8, one end of the screw 12 extending out of the lower right connecting plate 8 is a rotary driving end, the nut seat 14 is in threaded fit with the screw 12, the motor 11 is fixedly arranged on the nut seat 14, the motor 11 drives the spindle 2 to rotate through the transmission mechanism, the transmission mechanism comprises a first chain wheel 16, a second chain wheel 17 and a chain 18, the first chain wheel 16 is fixedly arranged at the driving end of the motor 11, the second chain wheel 17 is fixedly arranged on the spindle 2, the chain 18 is respectively connected with the first chain wheel 16 and the second chain wheel 17, a first end of the middle connecting plate 15 is fixedly connected with the nut seat 14, a second end of the middle connecting plate 15 is in rotatable fit with the spindle 2, in order to facilitate the layout design of the transmission mechanism, the middle connecting plate 15 is located at a position close to the second connecting part, and a second end of the middle connecting plate 15 is rotatably connected with the second chain wheel 17;
the main shaft 2 passes through the left three-way pipe 30 in proper order, left lower connecting plate 4, left upper connecting plate 3, right upper connecting plate 7, right lower connecting plate 8, right three-way pipe 9 and high-pressure protective pipe 10, the tip of high-pressure protective pipe 10 is the blind end, communicate through external balanced pipeline 19 between left three-way pipe 30 and the right three-way pipe 9, all be equipped with high-pressure sealing member between left lower connecting plate 4 and the main shaft 2 and between right lower connecting plate 8 and the main shaft 2, main shaft 2 respectively with left lower connecting plate 4 and right lower connecting plate 8 sliding fit.
In the technical scheme, the motor 11 drives the drill bit to rotate, and the screw rod 12 is driven to rotate to realize footage. Specifically, the motor 11 drives the first chain wheel 16 to rotate, the first chain wheel 16 drives the second chain wheel 17 to rotate through the chain 18, the second chain wheel 17 is fixedly mounted on the spindle 2, the spindle 2 is driven to rotate by the second chain wheel 17, meanwhile, one end, extending out of the lower right connecting plate 8, of the screw 12 is a rotary driving end, driving of the screw 12 is achieved through the rotary driving end, the nut seat 14 is in threaded fit with the screw 12, the first end of the intermediate connecting plate 15 is fixedly connected with the nut seat 14, the second end of the intermediate connecting plate 15 is in rotary fit with the spindle 2, the nut seat 14 drives the intermediate connecting plate 15 to move while the screw 12 rotates, and due to the fact that the second end of the intermediate connecting plate 15 is in rotary connection with the second chain wheel 17, linear driving of the second chain wheel 17 is achieved while the intermediate connecting plate 15 moves, linear driving of the spindle 2 is achieved at the same time, and finally the spindle 2 can be fed and retracted while rotating, so that an effect of drilling under pressure is achieved. Compared with the existing design, the drilling tool is simple in structure, low in cost, convenient to use and easy to maintain, the screw rod 12 is adopted for transmission in the feeding ruler, the screw rod 12 is stable in feeding, the speed is high, and the drilling efficiency is high.
Example 2:
this embodiment is optimized based on embodiment 1 described above.
The connecting opening 6 is provided with an arc sealing block 20, the arc sealing block 20 is provided with an arc sealing surface matched with the curved surface of the tubular column, the design of the sealing structure solves the problem of high-pressure sealing of the curved surface of the tubular column, the requirement of pressurized drilling of the tubular column with the pressure of 70MPa is met, the high-pressure sealing element is a V-shaped cloth clamping sealing ring 21, the problem of high-pressure dynamic sealing of the main shaft 2 is solved by utilizing the multiple V-shaped cloth clamping sealing ring 21, and the working pressure can reach 105MPa. The device can set the size of the drill rod 1 according to the requirement, and preferably, the diameter of the drilled hole can be phi 12 mm-phi 36mm.
Example 3:
this example was optimized based on example 1 described above.
In order to conveniently realize the installation between the left lower connecting plate 4 and the left three-way pipe 30, the right lower connecting plate 8 and the right three-way pipe 9 are installed, the left lower connecting plate 4 and the left three-way pipe 30 are in threaded connection, and the right lower connecting plate 8 and the right three-way pipe 9 are in threaded connection.
Example 4:
this example was optimized based on example 1 described above.
In order to realize the rotation fit between the middle connecting plate 15 and the main shaft 2, a connecting sleeve 22 is arranged at the second end of the middle connecting plate 15, the connecting sleeve 22 is in rotation fit with the main shaft 2, and the connecting sleeve 22 is in rotation connection with the second chain wheel 17.
Example 5:
this embodiment is optimized based on embodiment 4 described above.
In order to facilitate the coaxial rotation fit between the connecting sleeve 22 and the main shaft 2, the connecting sleeve 22 is provided with an annular groove 23, and a central shaft 24 of the second chain wheel 17 is positioned in the annular groove 23 and is rotatably connected with the annular groove 23.
Example 6:
this example was optimized based on example 5 described above.
In order to ensure the smooth rotation between the connecting sleeve 22 and the main shaft 2 and to improve the axial supporting effect, a rotating bearing 25 is arranged between the connecting sleeve 22 and the main shaft 2, and a pressure bearing 26 is arranged between the central shaft 24 and the annular groove 23.
Example 7:
this example was optimized based on example 1 described above.
In order to reduce the volume of the apparatus as much as possible, the connecting rod 13 is located directly above the screw 12.
Example 8:
this embodiment is optimized based on embodiment 1 described above.
In order to facilitate the turning of the screw 12 by manual operation, the rotary drive end is provided with a feed rod 27 for driving the turning of the screw 12.
Example 9:
this embodiment is optimized based on embodiment 1 described above.
In order to realize the fixed installation of the motor 11, the nut seat 14 is provided with a fixed seat 28, the motor 11 is fixedly installed on the fixed seat 28, and in order to improve the safety of use, the motor 11 is a hydraulic motor which is connected with a small-sized hydraulic station.
Example 10:
this example was optimized based on example 1 described above.
In order to realize the pressure relief of the left tee 30 and/or the right tee 9, the left tee 30 and/or the right tee 9 is connected with a plug valve 29.
In conclusion, the design of the pressure drilling operation can be carried out while production is carried out, drilling and pressure relief can be carried out synchronously, and the use safety is high.
Finally, it should be noted that: the above are merely preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a small-size hydraulic pressure drilling equipment which characterized in that: the drill rod is mounted at the front end of the main shaft, the first connecting part comprises a left upper connecting plate, a left lower connecting plate, a left three-way pipe and a hoop which are sequentially arranged and internally communicated, a communication port communicated with the left three-way pipe is formed in the hoop, and the second connecting part comprises a right upper connecting plate, a right lower connecting plate, a right three-way pipe and a high-pressure protective pipe which are sequentially arranged and internally communicated;
the feeding driving mechanism comprises a motor, a transmission mechanism, a screw rod, a connecting rod, a nut seat and a middle connecting plate, the connecting rod is fixedly arranged between a left upper connecting plate and a right upper connecting plate, two ends of the screw rod are respectively and rotatably connected with a left lower connecting plate and a right lower connecting plate, one end of the screw rod extending out of the right lower connecting plate is a rotary driving end, the nut seat is in threaded fit with the screw rod, the motor is fixedly arranged on the nut seat, the motor drives a spindle to rotate through the transmission mechanism, the transmission mechanism comprises a first chain wheel, a second chain wheel and a chain, the first chain wheel is fixedly arranged at the driving end of the motor, the second chain wheel is fixedly arranged on the spindle, the chain is respectively connected with the first chain wheel and the second chain wheel, the first end of the middle connecting plate is fixedly connected with the nut seat, the second end of the middle connecting plate is in rotating fit with the spindle, and the second end of the middle connecting plate is rotatably connected with the second chain wheel;
the main shaft sequentially penetrates through the left three-way pipe, the left lower connecting plate, the left upper connecting plate, the right lower connecting plate, the right three-way pipe and the high-pressure protecting pipe, the end portion of the high-pressure protecting pipe is a closed end, the left three-way pipe is communicated with the right three-way pipe through an external balance pipeline, high-pressure sealing elements are arranged between the left lower connecting plate and the main shaft and between the right lower connecting plate and the main shaft, and the main shaft is in sliding fit with the left lower connecting plate and the right lower connecting plate respectively.
2. A small-sized hydraulic pressure drilling apparatus according to claim 1, characterized in that: the connecting port is provided with an arc surface sealing block, and the high-pressure sealing element is a V-shaped cloth clamping sealing ring.
3. A small-sized hydraulic pressure drilling apparatus according to claim 1, characterized in that: the left lower connecting plate is in threaded connection with the left three-way pipe, and the right lower connecting plate is in threaded connection with the right three-way pipe.
4. A small-sized hydraulic pressure drilling equipment according to claim 1, characterized in that: and a connecting sleeve is arranged at the second end of the middle connecting plate, the connecting sleeve is in running fit with the main shaft, and the connecting sleeve is in running connection with the second chain wheel.
5. A small-sized hydraulic pressure drilling device according to claim 4, characterized in that: the connecting sleeve is provided with an annular groove, and the central shaft of the second chain wheel is positioned in the annular groove and is rotationally connected with the annular groove.
6. A small-sized hydraulic pressure drilling device according to claim 5, characterized in that: a rotating bearing is arranged between the connecting sleeve and the main shaft, and a pressure bearing is arranged between the central shaft and the annular groove.
7. A small-sized hydraulic pressure drilling apparatus according to claim 1, characterized in that: the connecting rod is positioned right above the screw rod.
8. A small-sized hydraulic pressure drilling equipment according to claim 1, characterized in that: and the rotary driving end is provided with a ruler feeding rod for driving the screw rod to rotate.
9. A small-sized hydraulic pressure drilling equipment according to claim 1, characterized in that: the nut seat is provided with a fixed seat, and the motor is fixedly installed on the fixed seat.
10. A small-sized hydraulic pressure drilling equipment according to claim 1, characterized in that: the left three-way pipe and/or the right three-way pipe are/is connected with a plug valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211117559.3A CN115283726A (en) | 2022-09-14 | 2022-09-14 | Small-size hydraulic drilling equipment with pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211117559.3A CN115283726A (en) | 2022-09-14 | 2022-09-14 | Small-size hydraulic drilling equipment with pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115283726A true CN115283726A (en) | 2022-11-04 |
Family
ID=83834247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211117559.3A Pending CN115283726A (en) | 2022-09-14 | 2022-09-14 | Small-size hydraulic drilling equipment with pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115283726A (en) |
-
2022
- 2022-09-14 CN CN202211117559.3A patent/CN115283726A/en active Pending
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