CN218121461U - Long-distance airtight directional coring device - Google Patents
Long-distance airtight directional coring device Download PDFInfo
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- CN218121461U CN218121461U CN202223034876.7U CN202223034876U CN218121461U CN 218121461 U CN218121461 U CN 218121461U CN 202223034876 U CN202223034876 U CN 202223034876U CN 218121461 U CN218121461 U CN 218121461U
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Abstract
The utility model provides a long-distance airtight directional coring device, which comprises an outer cylinder, a hydraulic pushing assembly, an inner cylinder, a coring assembly and a drill bit, wherein the hydraulic pushing assembly is arranged in the outer cylinder and is provided with a driving end which moves along the axial direction of the outer cylinder; one end of the inner cylinder is fixedly arranged at the driving end, and two pushing pieces are arranged on the inner cylinder; the coring assembly is arranged in the inner cylinder and comprises a first ball valve, a coring cylinder and a second ball valve which are sequentially arranged along the axial direction of the inner cylinder, wherein the first ball valve corresponds to one of the pushing pieces, and the second ball valve corresponds to the other pushing piece; the drill bit is arranged at one end, close to the second ball valve, of the outer barrel, a first channel for a sample to pass through is formed on the drill bit, and the first channel is in butt joint with the second ball valve. The utility model provides an airtight directional coring device of long distance has improved tunnelling speed.
Description
Technical Field
The utility model belongs to the technical field of the mining, concretely relates to airtight directional coring device of long distance.
Background
The coal bed gas content is required to be measured before and after extraction in the mining process, the measurement process is carried out by adopting a conventional rock core tube coring method, the exposure time of a coal core for underground gas content measurement is not more than 5 minutes, a mine needs to adopt progressive circulation and short drilling coring to carry out gas content test evaluation, the maximum sampling depth can reach about 120 meters at present, the coverage range of the sampling depth is small, not only can more requirements be met, but also the tunneling speed of a roadway is restricted, and the on-site extraction-excavation-mining operation is connected tensely.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides an airtight directional core device of long distance aims at solving the shallower unable meeting requirements of current coal core sample depth and influences the technical problem of the tunnelling speed in tunnel.
In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a long distance airtight directional coring device, includes:
an outer cylinder;
the hydraulic pushing assembly is arranged in the outer cylinder and provided with a driving end which moves along the axial direction of the outer cylinder;
one end of the inner cylinder is fixedly arranged at the driving end and used for sliding along the axial direction of the outer cylinder, and two pushing pieces are arranged on the inner cylinder;
the coring assembly is arranged in the inner cylinder and comprises a first ball valve, a coring cylinder and a second ball valve which are sequentially arranged along the axial direction of the inner cylinder, wherein the first ball valve corresponds to one of the pushing pieces, and the second ball valve corresponds to the other pushing piece; and
the drill bit is arranged at one end, close to the second ball valve, of the outer cylinder, a first channel for a sample to pass through is formed in the drill bit, and the first channel is in butt joint with the second ball valve;
the pushing piece is used for pushing a shifting fork of the first ball valve or the second ball valve so as to close the first ball valve or the second ball valve.
In one possible implementation, the long-distance airtight directional coring device further includes a ball injector disposed at an end of the outer cylinder facing away from the drill bit, the ball injector includes a blocking ball, and the hydraulic pushing assembly includes:
the gland is arranged at one end of the ball injector close to the inner cylinder, and a high-pressure water outlet is formed in the gland;
the connecting body is arranged between the gland and the first ball valve, a second channel for communicating the gland and the first ball valve is arranged in the connecting body, and the inner diameter of the second channel is smaller than the diameter of the blocking ball; and
the sliding sleeve is sleeved on the peripheries of the gland and the connecting body, the sliding sleeve is connected with the gland through an inserted rod, and the sliding sleeve forms the driving end;
the periphery of sliding sleeve protrusion be equipped with the butt in the shutoff flange of urceolus internal periphery, the shutoff flange is located high pressure water outlet dorsad the one side of bowling ware, the shutoff flange the bowling ware and the urceolus encloses to close and forms airtight cavity.
In a possible implementation manner, a third channel for the blocking ball to enter is arranged on the ball injector, and the diameter of the third channel is gradually reduced along the direction close to the inner cylinder.
In a possible implementation manner, an annular sealing groove is formed in the periphery of the blocking flange, the sliding sleeve further comprises a first sealing ring arranged in the sealing groove, and the first sealing ring protrudes out of the outer peripheral surface of the sliding sleeve and abuts against the inner peripheral surface of the outer cylinder.
In a possible implementation manner, a sliding guide groove is further arranged in the connecting body, the second channel is opposite to one end of the inner cylinder, the diameter of the sliding guide groove is gradually reduced along the direction towards the inner cylinder, and the maximum inner diameter of the sliding guide groove is equal to the inner diameter of the gland.
In a possible implementation manner, the inner cylinder includes a cylinder body and a pushing sleeve sequentially arranged along an axial direction of the outer cylinder, a first through groove for the shifting fork on the first ball valve to extend out is arranged on the periphery of the cylinder body, a pushing part abutting against the shifting fork on the first ball valve is formed on the inner wall of the first through groove in a protruding manner, and the pushing sleeve forms a pushing part abutting against the shifting fork on the second ball valve.
In a possible implementation manner, the push sleeve protrudes towards one shaft end of the drill bit to form a push plate adapted to the outer peripheral surface of the coring barrel, and the push plate forms a pushing piece abutting against a shifting fork on the second ball valve.
In a possible implementation, the coring assembly further comprises a connector arranged on the periphery of the second ball valve, a second through groove extending out of the shifting fork on the second ball valve is arranged on the connector, and the second through groove faces the opening of the push plate and is in sliding fit with the push plate.
In a possible implementation manner, the ball injector is in threaded fit with the outer cylinder, a second sealing ring abutted against the outer cylinder is arranged on the periphery of the ball injector, and the second sealing ring is positioned on one side, back to the inner cylinder, of an external thread on the ball injector.
In one possible implementation, the drill bit is threadedly engaged with the outer barrel.
In the embodiment of this application, compared with the prior art, in specific use, install this embodiment on the rig, the rig drives the urceolus rotation, the drill bit drills in the underground and realizes punching, at the in-process that punches, the material passes through the drill bit, the second ball valve gets into in the coring barrel, punch and finish the back, open hydraulic pressure and promote the assembly, hydraulic pressure promotes the assembly and drives the inner tube and remove, make impeller on the inner tube promote the shift fork on first ball valve and the second ball valve, close first ball valve and second ball valve, the both ends of coring barrel are realized sealing, take the urceolus out, demolish the coring barrel and obtain the sample. The embodiment of the utility model provides a core assembly is got through the inside setting at the inner tube, and the both ends of getting the core assembly set up first ball valve and second ball valve, accomplish blocking of a core section of thick bamboo internal gas pressure and external atmospheric pressure, are favorable to reducing the influence of pressure when long distance drills, satisfy the drilling process of longer distance, improve application scope, have improved tunnelling speed.
Drawings
Fig. 1 is a schematic front view of a long-distance airtight directional coring device according to an embodiment of the present invention;
FIG. 2 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is an enlarged view of the portion B of FIG. 2;
fig. 4 is a schematic view of the inner cylinder and the coring assembly according to the embodiment of the present invention.
Description of reference numerals:
10-an outer cylinder;
20-hydraulic pushing assembly; 21-a gland; 211-high pressure water outlet; 22-a linker; 221-a second channel; 222-a guide chute; 23-a sliding sleeve; 24-a plunger; 25-a first seal ring;
30-an inner cylinder; 31-a pusher; 32-cylinder body; 321-a first through slot; 33-pushing the sleeve; 34-a push plate; 35-a connector; 351-a second through slot;
40-coring assembly; 41-a first ball valve; 42-a core barrel; 43-a second ball valve;
50-a drill bit;
60-a ball injector; 61-a blocking ball; 62-a third channel; 63-second seal ring.
Detailed Description
In order to make the technical problem, technical solution and beneficial effects to be solved by the present invention more clearly understood, the following description is made in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 to 4, the long-distance airtight directional coring device of the present invention will now be described. The long-distance closed directional coring device comprises an outer cylinder 10, a hydraulic pushing assembly 20, an inner cylinder 30, a coring assembly 40 and a drill bit 50, wherein the hydraulic pushing assembly 20 is arranged in the outer cylinder 10, and the hydraulic pushing assembly 20 is provided with a driving end which moves along the axial direction of the outer cylinder 10; one end of the inner cylinder 30 is fixedly arranged at the driving end and is used for sliding along the axial direction of the outer cylinder, and two pushing pieces 31 are arranged on the inner cylinder 30; the coring assembly 40 is arranged in the inner cylinder 30, the coring assembly 40 comprises a first ball valve 41, a coring cylinder 42 and a second ball valve 43 which are sequentially arranged along the axial direction of the inner cylinder 30, the first ball valve 41 corresponds to one of the pushing pieces 31, and the second ball valve 43 corresponds to the other pushing piece 31; the drill bit 50 is arranged at one end of the outer cylinder 10 close to the second ball valve 43, and a first channel for the sample to pass through is formed on the drill bit 50 and is butted with the second ball valve; the pushing member 31 is used for pushing a shifting fork of the first ball valve 41 or the second ball valve 43 so as to close the first ball valve 41 or the second ball valve 43.
It should be noted that, the first ball valve 41 and the second ball valve 43 can both adopt a stainless steel high-pressure ball valve DN6.
The airtight directional coring device of long distance that this embodiment provided, compared with the prior art, in concrete use, install this embodiment on the rig, the rig drives urceolus 10 rotatory, drill bit 50 drills in the underground and realizes punching, at the in-process that punches, the material passes through drill bit 50, second ball valve 43 gets into in the coring barrel 42, after finishing punching, open hydraulic pressure and promote assembly 20, hydraulic pressure promotes assembly 20 and drives inner tube 30 and remove along the direction that is close to drill bit 50, make impeller 31 on the inner tube 30 promote the shift fork on first ball valve 41 and the second ball valve 43, close first ball valve 41 and second ball valve 43, the both ends of coring barrel 42 are realized sealing, take out urceolus 10, demolish coring barrel 42 and obtain the sample. The embodiment of the utility model provides a core assembly 40 is got through the inside setting at inner tube 30, and the both ends of getting core assembly 40 set up first ball valve 41 and second ball valve 43, accomplish blocking of core section of thick bamboo 42 internal gas pressure and external atmospheric pressure, are favorable to reducing pressure's influence when long distance drills, satisfy the process of drilling of longer distance, improve application scope, have improved tunnelling speed.
In some embodiments, a specific embodiment of the hydraulic pushing assembly 20 may be configured as shown in FIG. 2. Referring to fig. 2, the long-distance closed directional coring device further comprises a ball injector 60 arranged at one end of the outer cylinder 10 opposite to the drill bit 50, the ball injector 60 comprises a blocking ball 61, the hydraulic pushing assembly 20 comprises a gland 21, a connecting body 22 and a sliding sleeve 23, the gland 21 is arranged at one end of the ball injector 60 close to the inner cylinder 30, and the gland 21 is provided with a high-pressure water outlet 211; the connecting body 22 is arranged between the gland 21 and the first ball valve 41, a second channel 221 for communicating the gland 21 and the first ball valve 41 is arranged in the connecting body 22, and the inner diameter of the second channel 221 is smaller than the diameter of the blocking ball 61; the sliding sleeve 23 is sleeved on the periphery of the gland 21 and the connecting body 22, the sliding sleeve 23 is connected with the gland 21 through the inserted rod 24, and the sliding sleeve 23 forms a driving end; the periphery of the sliding sleeve 23 is convexly provided with a plugging flange which is abutted against the inner periphery of the outer cylinder 10, the plugging flange is positioned on one side of the high-pressure water outlet 211 opposite to the ball injector 60, and the plugging flange, the ball injector 60 and the outer cylinder 10 are enclosed to form a closed cavity. The closed cavity is actually a space surrounded by the outer periphery of the gland 23, the inner periphery of the outer cylinder 10, the plugging flange and the ball injector 60.
In the concrete implementation, during the coring drilling process, the drill bit 50 drills a coal sample, the coring barrel 42 collects the coal sample, the drilling is stopped after the coring length is reached, the plugging ball 61 is thrown into the joint of the long-distance closed directional coring device and the water whip, the slurry pump pressurizes and sends the plugging ball 61 to the plugging connecting body 22 in the connecting body 22, along with the continuous pressurization of the slurry pump, high-pressure water enters the closed cavity (namely the space between the outer peripheral surface of the gland 21 and the inner peripheral surface of the outer barrel 10) through the high-pressure water outlet 211, because the sliding sleeve 23 is sleeved on the outer periphery of the gland 21, the high-pressure water continuously extrudes the sliding sleeve 23 on the outer periphery of the gland 21 to obtain the inserted rod 24 between the sliding sleeve 23 and the gland 21, the sliding sleeve 23 slides towards the direction of the drill bit 50 under the extrusion of the high-pressure water, the sliding sleeve 23 drives the inner barrel 30 to slide in the sliding process, the pushing piece 31 on the inner barrel 30 realizes the closing of the first ball valve 41 and the second ball valve 43, the slurry pump is closed, and then the coring barrel 42 is taken out. The structure enables the inserted rod 24 between the sliding sleeve 23 and the gland 21 to be broken through high-pressure water, so that the sliding of the sliding sleeve 23 is realized, the accuracy of closing the first ball valve 41 and the second ball valve 43 at the two ends of the coring barrel 42 is ensured, and the integrity of a sample in the coring barrel 42 is improved.
It should be noted that, the axial direction of the plunger 24 is perpendicular to the axial direction of the sliding sleeve 23, one end of the plunger 24 is inserted into the sliding sleeve 23, and the other end is inserted into the gland 21, when the pressure in the closed cavity is continuously increased, because the gland 21 is butted with the coring assembly 40, the coring assembly 40 cannot slide, but the inner cylinder 30 is sleeved on the outer periphery of the coring assembly 40 and has a sliding space, so that the high-pressure water pushes the sliding sleeve 23 at the outer periphery of the gland 21 to drive the inner cylinder 30 to slide in the direction close to the drill bit 50, and the sliding sleeve 23 gives a shearing force to the plunger 24, so that the plunger 24 is cut off.
Specifically, the blocking ball 61 can be a rubber ball, so that the elasticity is higher, and the blocking effect is better.
In some embodiments, a modified embodiment of the above-described ball injector 60 may be configured as shown in FIG. 2. Referring to fig. 2, the ball injector 60 is provided with a third passage 62 for blocking entry of the ball 61, and the diameter of the third passage 62 is gradually reduced in a direction close to the inner cylinder 30. After the plugging ball 61 enters the third channel 62, under the variation trend of the inner diameter of the third channel 62, the plugging ball 61 can smoothly enter the connecting body 22 along the third channel 62, and the plugging ball 61 is prevented from being stuck to influence the closing of the first ball valve 41 and the second ball valve 43 at the two ends of the core barrel 42.
In some embodiments, a modified embodiment of the sliding sleeve 23 can be configured as shown in fig. 2 to 4. Referring to fig. 2 to 4, an annular sealing groove is formed in the outer periphery of the sealing flange, the sliding sleeve 23 further includes a first sealing ring 25 disposed in the sealing groove, and the first sealing ring 25 protrudes from the outer peripheral surface of the sliding sleeve 23 and abuts against the inner peripheral surface of the outer cylinder 10. By arranging the sealing ring, the sealing performance between the sliding sleeve 23 and the outer cylinder 10 in the sliding process is improved, and the situation that the inserted rod 24 cannot be broken due to insufficient pressure in a closed cavity caused by the fact that high-pressure water enters between the outer cylinder 10 and the inner cylinder 30 is avoided.
In some embodiments, a modified embodiment of the connector 22 described above may be configured as shown in fig. 2-3. Referring to fig. 2 to 3, a sliding guide slot 222 is further disposed in the connecting body 22 at an end of the second channel 221 facing away from the inner cylinder 30, a diameter of the sliding guide slot 222 gradually decreases in a direction toward the inner cylinder 30, and a maximum inner diameter of the sliding guide slot 222 is equal to an inner diameter of the gland 21. When the plugging ball 61 reaches the connector 22 along the inner hole of the gland 21, firstly the plugging ball enters the guide chute 222, and because the plugging ball 61 is a rubber ball, the rubber ball slides in the guide chute 222 to gradually extrude the rubber ball, so that the rubber ball is clamped in the guide chute 222, the plugging of the rubber ball is ensured to be coaxial with the connector 22, the plugging effect is further improved, and the high-pressure water is prevented from entering and influencing the pressure in the sealed cavity.
In some embodiments, an embodiment of the inner barrel 30 can be configured as shown in fig. 2 and 4. Referring to fig. 2 and 4, the inner cylinder 30 includes a cylinder 32 and a push sleeve 33 sequentially arranged along the axial direction of the outer cylinder 10, a first through groove 321 for extending a shift fork on the first ball valve 41 is formed on the periphery of the cylinder 32, a push member 31 abutting against the shift fork on the first ball valve 41 is formed on the inner wall of the first through groove 321 in a protruding manner, and the push sleeve 33 forms a push member 31 abutting against the shift fork on the second ball valve 43. When the first ball valve 41 is closed, the shifting fork on the first ball valve 41 is pushed to rotate by the pushing part 31, through the arrangement of the first through groove 321, a rotating space of the shifting fork on the first ball valve 41 is conveniently reserved, and the shifting fork is pushed by the pushing part 31 protruding from the inner wall of the first through groove 321 on the barrel 32, namely, the pushing part 31 corresponding to the first ball valve 41 and the barrel 32 are integrally formed, the structure is simple, the inner barrel 30 is moved to close the first ball valve 41, and the synchronism is good.
In some embodiments, a modified embodiment of the above-mentioned push sleeve 33 can adopt the structure shown in fig. 2 and 4. Referring to fig. 2 and 4, a push plate 34 adapted to the outer peripheral surface of the core barrel 42 is formed by projecting the push sleeve 33 toward one axial end of the drill 50, and the push plate 34 forms a push member 31 abutting against a fork on the second ball valve 43. The second ball valve 43 is arranged between the cylinder 32 and the drill 50, and because the diameter of the drill 50 is larger (which needs to be adapted to the outer cylinder 10), the end of the inner cylinder 30 is provided with the push sleeve 33, so that the butt joint of the cylinder 32 and the drill 50 can be adapted, and the push plate 34 on the push sleeve 33 directly drives the shifting fork on the second ball valve 43.
In some embodiments, a modified embodiment of the coring assembly 40 described above may be configured as shown in fig. 2 and 4. Referring to fig. 2 and 4, the coring assembly 40 further includes a connector 35 disposed on the outer periphery of the second ball valve 43, a second through groove 351 for the fork on the second ball valve 43 to extend out is disposed on the connector 35, and the second through groove 351 is opened toward the push plate 34 and is in sliding fit with the push plate 34. The core barrel 42 and the drill 50 are connected to the connector 35, the second ball valve 43 is fixed to the connector 35, the guide to the push plate 34 is achieved through the sliding fit of the push plate 34 and the second through groove 351, the fact that the shifting fork on the second ball valve 43 can be accurately shifted when the inner cylinder 30 drives the push plate 34 to move is guaranteed, and stability in the sliding process is improved.
In some embodiments, a modified embodiment of the above-described ball injector 60 may be configured as shown in fig. 2-4. Referring to fig. 2 to 4, the ball injector 60 is screwed with the outer cylinder 10, a second sealing ring 63 abutting against the outer cylinder 10 is provided on the outer periphery of the ball injector 60, and the second sealing ring 63 is located on the side of the external thread of the ball injector 60 facing away from the inner cylinder 30. The ball injector 60 is in threaded fit with the outer cylinder 10, so that the disassembly, replacement and maintenance are convenient; the two are in threaded fit, an internal thread is arranged on the outer cylinder 10, the ball injector 60 is provided with an external thread corresponding to the internal thread, and a second sealing ring 63 is arranged on one side of the external thread, so that the sealing effect is improved, the pressure in a closed cavity is ensured, and high-pressure water is prevented from rushing out.
In some embodiments, a modified embodiment of the drill bit 50 described above may be configured as shown in FIG. 2. Referring to fig. 2, the drill bit 50 is threadedly engaged with the outer barrel 10. The drill bit 50 is a main loss part in the tunneling process, the drill bit 50 is matched with the outer barrel 10 through threads, the drill bit 50 can be conveniently replaced independently, and compared with a structure that the drill bit 50 and the outer barrel 10 are integrally formed, the cost is lower in the using process.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides a directional coring device of long distance is airtight which characterized in that includes:
an outer cylinder;
the hydraulic pushing assembly is arranged in the outer cylinder and provided with a driving end which moves along the axial direction of the outer cylinder;
one end of the inner cylinder is fixedly arranged at the driving end and used for sliding along the axial direction of the outer cylinder, and two pushing pieces are arranged on the inner cylinder;
the coring assembly is arranged in the inner cylinder and comprises a first ball valve, a coring cylinder and a second ball valve which are sequentially arranged along the axial direction of the inner cylinder, wherein the first ball valve corresponds to one of the pushing pieces, and the second ball valve corresponds to the other pushing piece; and
the drill bit is arranged at one end, close to the second ball valve, of the outer cylinder, a first channel for a sample to pass through is formed in the drill bit, and the first channel is in butt joint with the second ball valve;
the pushing piece is used for pushing a shifting fork of the first ball valve or the second ball valve so as to close the first ball valve or the second ball valve.
2. The long reach closed directional coring device of claim 1, wherein the long reach closed directional coring device further comprises a ball injector disposed at an end of the outer barrel facing away from the drill bit, the ball injector comprising a blocking ball, the hydraulic drive assembly comprising:
the gland is arranged at one end of the ball injector close to the inner cylinder, and a high-pressure water outlet is formed in the gland;
the connecting body is arranged between the gland and the first ball valve, a second channel for communicating the gland and the first ball valve is arranged in the connecting body, and the inner diameter of the second channel is smaller than the diameter of the blocking ball; and
the sliding sleeve is sleeved on the peripheries of the gland and the connecting body, the sliding sleeve is connected with the gland through an inserted rod, and the sliding sleeve forms the driving end;
the periphery of sliding sleeve protrusion be equipped with the butt in the shutoff flange of urceolus internal periphery, the shutoff flange is located high pressure water outlet dorsad the one side of bowling ware, the shutoff flange the bowling ware and the urceolus encloses to close and forms closed cavity.
3. The long distance closed directional coring device of claim 2, wherein said ball injector is provided with a third channel for entry of said blocking ball, said third channel having a diameter that decreases in a direction approaching said inner barrel.
4. The long-distance closed directional coring device of claim 2, wherein the outer periphery of the blocking flange is provided with an annular sealing groove, the sliding sleeve further comprises a first sealing ring arranged in the sealing groove, and the first sealing ring protrudes out of the outer peripheral surface of the sliding sleeve and abuts against the inner peripheral surface of the outer cylinder.
5. The long-distance closed directional coring device as set forth in claim 2, wherein a guide groove is further provided in the connecting body at an end of the second passage facing away from the inner cylinder, the guide groove having a diameter gradually decreasing in a direction toward the inner cylinder, the guide groove having a maximum inner diameter equal to an inner diameter of the gland.
6. The long-distance closed directional coring device as set forth in claim 1, wherein the inner cylinder comprises a cylinder body and a pushing sleeve sequentially arranged along the axial direction of the outer cylinder, a first through groove for extending the shift fork on the first ball valve is arranged on the outer circumference of the cylinder body, a pushing member abutting against the shift fork on the first ball valve is formed on the inner wall of the first through groove in a protruding manner, and a pushing member abutting against the shift fork on the second ball valve is formed on the pushing sleeve.
7. The long-distance closed directional coring device as set forth in claim 6, wherein the push sleeve is formed with a push plate protruding toward one axial end of the drill bit and adapted to the outer peripheral surface of the coring barrel, the push plate forming a push member abutting against a shift fork on the second ball valve.
8. The long-distance closed directional coring device of claim 7, wherein the coring assembly further comprises a connector arranged on the periphery of the second ball valve, wherein a second through groove for the shifting fork on the second ball valve to extend out is arranged on the connector, and the second through groove faces the opening of the push plate and is in sliding fit with the push plate.
9. The long-distance closed directional coring device as set forth in claim 2, wherein the ball injector is screw-fitted to the outer cylinder, and a second seal ring abutting against the outer cylinder is provided on the outer periphery of the ball injector, the second seal ring being located on a side of the external screw thread of the ball injector facing away from the inner cylinder.
10. The long reach closed directional coring device of claim 1, wherein said drill bit is threadedly engaged with said outer barrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223034876.7U CN218121461U (en) | 2022-11-16 | 2022-11-16 | Long-distance airtight directional coring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223034876.7U CN218121461U (en) | 2022-11-16 | 2022-11-16 | Long-distance airtight directional coring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218121461U true CN218121461U (en) | 2022-12-23 |
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ID=84497235
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223034876.7U Active CN218121461U (en) | 2022-11-16 | 2022-11-16 | Long-distance airtight directional coring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218121461U (en) |
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2022
- 2022-11-16 CN CN202223034876.7U patent/CN218121461U/en active Active
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