CN111691818B - Underground coal mine pneumatic directional drilling lubricating device and pneumatic screw drill - Google Patents
Underground coal mine pneumatic directional drilling lubricating device and pneumatic screw drill Download PDFInfo
- Publication number
- CN111691818B CN111691818B CN202010378038.8A CN202010378038A CN111691818B CN 111691818 B CN111691818 B CN 111691818B CN 202010378038 A CN202010378038 A CN 202010378038A CN 111691818 B CN111691818 B CN 111691818B
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- pipe
- piston
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- 230000001050 lubricating effect Effects 0.000 title claims abstract description 42
- 238000005553 drilling Methods 0.000 title claims abstract description 35
- 239000003245 coal Substances 0.000 title claims abstract description 20
- 239000003921 oil Substances 0.000 claims abstract description 61
- 239000010687 lubricating oil Substances 0.000 claims abstract description 20
- 238000013016 damping Methods 0.000 claims abstract description 15
- 238000007789 sealing Methods 0.000 claims abstract description 14
- 239000003595 mist Substances 0.000 claims abstract description 13
- 238000002347 injection Methods 0.000 claims abstract description 11
- 239000007924 injection Substances 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 5
- 239000006185 dispersion Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 3
- 239000011324 bead Substances 0.000 claims 4
- 239000007788 liquid Substances 0.000 claims 1
- 238000009827 uniform distribution Methods 0.000 claims 1
- 238000005461 lubrication Methods 0.000 abstract description 4
- 238000004062 sedimentation Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 25
- 238000001816 cooling Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- 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
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/003—Bearing, sealing, lubricating details
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
-
- 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
- F16N—LUBRICATING
- F16N11/00—Arrangements for supplying grease from a stationary reservoir or the equivalent in or on the machine or member to be lubricated; Grease cups
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a coal mine underground pneumatic directional drilling lubricating device and a pneumatic screw drill tool, wherein the lubricating device comprises an oil injection unit, the oil injection unit comprises an outer pipe, an inner pipe, a piston and a shutoff nozzle, the inner pipe is sleeved in the outer pipe, and a cavity for filling lubricating oil is arranged between the outer pipe and the inner pipe; the piston is arranged in the gap and can move axially along the gap, and a sealing cavity for filling lubricating oil is formed among the outer pipe, the inner pipe and the piston; the wall of the inner pipe is provided with a damping hole communicated with the sealing cavity; the shutoff nozzle is arranged at the power medium inlet end of the inner pipe, a fourth through hole for the power medium to pass through is arranged on the shutoff nozzle, and the diameter of the fourth through hole is smaller than that of the inner pipe. The invention realizes the direct lubrication of the hole bottom of the pneumatic screw drill and improves the lubrication effect; effectively inhibits the sedimentation of the oil mist and solves the problem of temperature rise in the long-distance oil mist conveying process.
Description
Technical Field
The invention relates to a lubricating device for underground coal mine pneumatic directional drilling and a pneumatic screw drill, belonging to the technical field of drilling, wherein the lubricating device can be used for injecting oil to the drill at the bottom of a hole for lubrication.
Background
The pneumatic screw drilling tool adopts pressure air or nitrogen as a power medium and a powder discharge medium, has the characteristic of small disturbance to the hole wall compared with a hydraulic screw drilling tool, and is gradually applied to directional drilling of broken soft coal seams in coal mines. The hydraulic screw drilling tool adopts clean water or slurry, and has good lubricating performance for the stator and the rotor of the screw drilling tool, but the pneumatic screw drilling tool adopts pressure air or nitrogen and has poor cooling and lubricating effects for the stator and the rotor of the screw drilling tool, so that the pneumatic screw drilling tool has low use reliability and short service life. Therefore, the efficient lubrication and cooling of the stator and the rotor during the drilling of the pneumatic screw drill are of great significance to the improvement of the reliability of the drilling equipment, the reduction of the failure rate, the reduction of the drilling cost and the improvement of the drilling efficiency.
At present, hydraulic oil with a certain displacement is pumped into a drill rod by an oil injection pump outside a hole for cooling, and the lubricating oil is conveyed to a stator and a rotor of a hole bottom screw drill along with a power medium in the drill rod for lubricating the drill rod, but the mode has the following defects:
(1) when the drilling depth is long, the conveying distance of the lubricating oil in the drill rod is long, and the problem of oil mist settlement exists;
(2) in the long-distance oil mist conveying process, the oil mist collides with the inner wall of the drill rod repeatedly, so that the temperature of the oil mist is increased, and the cooling and lubricating effects of the oil mist are reduced.
(3) Oil droplets are accumulated on the inner wall of the drill rod after the oil mist is settled, and the coal dust in a drilling field is easily adhered after the oil mist is disassembled, so that the drilling tool is polluted.
Disclosure of Invention
In order to solve the problems, the invention provides a coal mine underground pneumatic directional drilling lubricating device and a pneumatic screw drill, and solves the problems of poor cooling and lubricating effects and drill tool pollution caused by oil mist sedimentation and temperature rise in the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme:
the underground coal mine pneumatic directional drilling lubricating device comprises an oil injection unit, wherein the oil injection unit comprises an outer pipe, an inner pipe, a piston and a shutoff nozzle, the inner pipe is sleeved in the outer pipe, and a cavity for filling lubricating oil is arranged between the outer pipe and the inner pipe;
the piston is arranged in the gap and can axially move along the gap, and a sealing cavity for filling lubricating oil is formed among the outer pipe, the inner pipe and the piston;
the wall of the inner pipe is provided with a damping hole communicated with the sealing cavity;
the shutoff nozzle is arranged at the power medium inlet end of the inner pipe, a fourth through hole for the power medium to pass through is formed in the shutoff nozzle, and the diameter of the fourth through hole is smaller than that of the inner pipe.
Specifically, a first through hole and a second through hole are arranged in the outer pipe, the diameter of the first through hole is larger than that of the second through hole, and the cavity is formed between the wall of the first through hole and the outer wall of the inner pipe; the outer wall at inner tube both ends on be provided with first stopper and the second stopper that is used for restricting inner tube axial displacement respectively, the external diameter of second stopper match with the internal diameter of outer tube, be provided with the third through-hole that supplies the power medium to pass through on the second stopper.
Specifically, the diameter of the damping hole is 0.2-0.5 mm.
Furthermore, an oil filling hole communicated with the first cavity is formed in the outer pipe.
Preferably, the contact surface between the piston and the outer pipe and the contact surface between the piston and the inner pipe are both provided with sealing rings.
Further, the lubricating device further comprises a droplet dispersion unit for dispersing the lubricating oil flowing out from the oil injection unit, the droplet dispersion unit being provided in the outer tube.
Specifically, the oil drop dispersing unit is of a porous structure.
Furthermore, the lubricating device also comprises an oil-gas mixing unit, wherein the oil-gas mixing unit is provided with a plurality of spiral holes for oil gas to pass through; the oil-gas mixing unit is arranged at the front end of the outer pipe.
Specifically, the oil-gas mixing unit include the body and set up the oil-gas mixing case in the body, the body connect the outer tube front end, the oil-gas mixing case on be provided with multichannel spiral hole, the axis intercrossing of adjacent twice spiral hole.
The invention also discloses a coal mine underground pneumatic screw drill, which comprises a drill rod, a screw drill and the lubricating device, wherein the lubricating device is arranged between the drill rod and the screw drill.
Compared with the prior art, the invention has the beneficial effects that:
the lubricating device is directly connected to the screw drilling tool, when no power medium passes through the lubricating device, the pressure difference of the piston is not enough to enable lubricating oil to seep out of the damping hole, when power medium passes through the lubricating device, the pressure difference born by the piston is increased, the lubricating oil slowly seeps out of the damping hole, and the uniformly mixed gas oil is conveyed to the screw drilling tool. The hole bottom of the pneumatic screw drill is directly lubricated, and the lubricating effect is improved; effectively inhibits the sedimentation of the oil mist and solves the problem of temperature rise in the long-distance oil mist conveying process.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
Fig. 1 is a schematic view of the overall structure of a lubricating device according to an embodiment of the present invention.
Fig. 2 is a schematic structural view of an oil injection unit according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of an oil-gas mixing unit according to an embodiment of the present invention.
Fig. 4 is a schematic structural view of an oil-gas mixing valve core according to an embodiment of the present invention.
Fig. 5 is a schematic view illustrating the connection of the overall structure of the drilling tool according to the embodiment of the present invention.
The reference numerals in the figures denote:
1-an oil injection unit, 2-an oil droplet dispersion unit, 3-an oil-gas mixing unit, 4-a retainer ring, 5-a drill rod and 6-a screw drill;
101-outer pipe, 102-inner pipe, 103-piston, 104-shutoff nozzle, 105-gap, 106-fourth through hole, 107-first through hole, 108-second through hole, 109-first limiting block, 110-second limiting block, 111-third through hole, 112-damping hole, 113-oil filling hole and 114-sealing ring;
301-pipe body, 302-oil-gas mixing valve core, 303-spiral hole.
The details of the present invention are explained in further detail below with reference to the drawings and the detailed description.
Detailed Description
In the present invention, the front end of the outer pipe 101 and the front end of the pipe body 301 are referred to as the power medium outflow end, and the rear end of the outer pipe 101 and the rear end of the pipe body 301 are referred to as the power medium inflow end.
The following embodiments of the present invention are provided, and it should be noted that the present invention is not limited to the following embodiments, and all equivalent changes based on the technical solutions of the present invention are within the protection scope of the present invention.
In the present invention, unless otherwise specified, the use of the terms of orientation such as "upper, lower, left, and right" generally means defined with reference to the drawing plane of the corresponding drawing, and "inner and outer" means defined with reference to the outline of the corresponding drawing.
Example 1
The embodiment discloses a coal mine underground pneumatic directional drilling lubricating device which comprises an oiling unit 1, and is shown in figure 1. The oil injection unit 1 comprises an outer tube 101, an inner tube 102, a piston 103 and a shut-off nozzle 104.
The inner tube 102 is fitted into the outer tube 101, and the outer diameter of the inner tube 102 is smaller than the inner diameter of the outer tube 101, so that a gap 105 is formed between the outer tube 101 and the inner tube 102.
The piston 103 is arranged in the gap 105, the piston 103 is annular, and a sealed cavity for filling lubricating oil is formed among the outer pipe 101, the inner pipe 102 and the piston 103; the piston 103 can move axially along the gap 105 under the pushing of the power medium, and further extrude the sealing cavity.
Specifically, in this embodiment, a first through hole 107 and a second through hole 108 are disposed in the outer tube 101, the diameter of the first through hole 107 is larger than that of the second through hole 108, and a gap 105 is formed between the hole wall of the first through hole 107 and the outer wall of the inner tube 102. The outer walls of the two ends of the inner tube 102 are respectively provided with a first limiting block 109 and a second limiting block 110 for limiting the axial movement of the inner tube 102, the first limiting block 109 is pressed against a step formed by a first through hole 107 and a second through hole 108 on the inner wall of the outer tube to limit the inner tube 102 to continuously move towards the second through hole 108; a retainer ring 4 is provided at the second stopper 109 for restricting the inner tube 102 from moving in the other direction. The outer diameter of the second limiting block 110 is matched with the inner diameter of the outer tube 102, a third through hole 111 for the power medium to pass through is formed in the second limiting block 110, the power medium entering the outer tube 101 enters the piston 103 through the third through hole 111, and the piston 103 is extruded to move. Specifically, the third through holes 111 are provided along the circumference of the second stopper 110.
In order to facilitate the input of lubricating oil into the sealed cavity, an oil filling hole 113 communicating with the sealed cavity is provided on the outer pipe 101, and an oil plug for sealing the housing oil filling hole 113 is provided in the oil filling hole 113.
The wall of the inner tube 102 is provided with a damping hole 112 communicated with the sealed cavity to play a role of lubricating oil seepage. When no power medium passes, the pressure difference of the piston 103 is not enough to cause the lubricating oil to seep out of the damping hole 112, and when the power medium passes, the pressure difference borne by the piston 103 is increased, so that the lubricating oil slowly seeps out of the damping hole 112. In this embodiment, the diameter of the damping hole 112 is 0.2-0.5 mm.
The shutoff nozzle 104 is arranged at the motive medium inlet end of the inner pipe 102, the shutoff nozzle 104 is provided with a fourth through hole 106 for the motive medium to pass through, and the diameter of the fourth through hole 106 is smaller than that of the inner pipe 102. The shutoff nozzle 104 causes a pressure difference of the motive medium passing through the fourth through hole 106, thereby pushing the piston 103 to compress the lubricating oil. The power medium in the invention is gas.
Preferably, sealing rings 114 are provided at the interface of the piston 103 with the outer tube 101 and at the interface of the piston 103 with the inner tube 102 for sealing the sealing cavities.
Example 2
This example differs from example 1 in that: the lubricating apparatus further comprises a droplet dispersion unit 2 for dispersing the lubricating oil flowing out from the oiling unit 1.
Wherein the oil droplet dispersing unit 2 is disposed in the outer tube 101, and specifically, as shown in fig. 1, the oil droplet dispersing unit is snap-fitted in the second through hole 108.
The oil drop dispersing unit 2 of the embodiment is a porous structure, specifically, a cylinder made of a porous medium material is installed in the second through hole 108, and large oil drops are forcibly extruded into small particles when passing through the oil drop dispersing unit 2, so that the oil drops are more dispersed.
Example 3
This example differs from example 1 in that: the lubricating device further comprises an oil-gas mixing unit 3, wherein the oil-gas mixing unit 3 is provided with a plurality of spiral holes 303 for oil gas to pass through. The oil-gas mixing unit 3 is provided at the front end of the outer pipe 101.
The oil-gas mixing unit 3 of this embodiment includes body 301 and the oil-gas mixing case 302 of setting in body 301, and body 301 is connected at outer tube 101 front end, and oil-gas mixing case 302 is the cylinder that a diameter and body 301 internal diameter match, is provided with multichannel spiral hole 303 on the cylinder, and spiral hole 303 link up the both ends of oil-gas mixing case, and the axis intercrossing of adjacent twice spiral hole 303. The gas and the oil drops from the oil drop dispersion device can generate multi-channel spiral motion, so that the gas phase and the liquid phase are mixed more uniformly.
Both ends of the oil-gas mixing valve core 302 of the embodiment are fixed in the pipe body 301 through the retainer rings 4.
Example 4
This example differs from example 2 in that: the lubricating device of the present embodiment further includes the air-oil mixing unit 3 described in embodiment 3, as shown in fig. 1.
Wherein, the front end of body 301 one end and the outer tube 101 in the oiling unit 1 in the oil gas mixing unit 3 passes through the male and female joint to be connected.
Example 5
The embodiment discloses a pneumatic screw drill in a coal mine, which comprises a drill rod 5, a lubricating device and a screw drill 6 as shown in figure 5. Wherein the lubricating device is arranged between the drill rod 4 and the screw drill 5.
If the lubricating device of the present embodiment is the lubricating device described in embodiment 1 or embodiment 2, the drill rod 4 is connected to the rear end of the outer tube 101, and the screw drill 5 is connected to the front end of the outer tube 101.
If the lubricating device of the present embodiment is the lubricating device described in embodiment 3 or embodiment 4, the drill rod 4 is connected to the rear end of the outer tube 101, and the screw drill 5 is connected to the front end of the tube 301.
In the above description, unless otherwise explicitly stated or limited, the terms "disposed" and "connected" are to be understood broadly, and may be, for example, fixedly connected or detachably connected or integrated; either a direct connection or an indirect connection, and the like. The specific meaning of the above terms in the present technical solution can be understood by those of ordinary skill in the art according to specific situations.
The respective specific technical features described in the above-described embodiments may be combined in any suitable manner without contradiction as long as they do not depart from the gist of the present invention, and should also be regarded as being disclosed in the present invention.
Claims (8)
1. A coal mine underground pneumatic directional drilling lubricating device is characterized by comprising an oiling unit (1), an oil bead dispersing unit (2) and an oil-gas mixing unit (3), wherein the oil bead dispersing unit is used for dispersing lubricating oil flowing out of the oiling unit (1);
the oil injection unit (1) comprises an outer pipe (101), an inner pipe (102), a piston (103) and a shutoff nozzle (104), wherein the inner pipe (102) is sleeved in the outer pipe (101), and a gap (105) is formed between the outer pipe (101) and the inner pipe (102);
the piston (103) is arranged in the gap (105), the piston (103) can move axially along the gap (105), and a sealing cavity for filling lubricating oil is formed among the outer pipe (101), the inner pipe (102) and the piston (103);
the wall of the inner pipe (102) is provided with a damping hole (112) communicated with the sealed cavity;
the intercepting nozzle (104) is arranged at the power medium inlet end of the inner pipe (102), a fourth through hole (106) for the power medium to pass through is formed in the intercepting nozzle (104), and the diameter of the fourth through hole (106) is smaller than that of the inner pipe (102);
the oil drop dispersing unit (2) is arranged in the outer pipe (101);
the oil-gas mixing unit (3) is arranged at the front end of the outer pipe (101), and the oil-gas mixing unit (3) is provided with a plurality of spiral holes (303) for oil gas to pass through;
the oil injection process of the coal mine underground pneumatic directional drilling lubricating device is divided into three processes:
firstly, when unpowered medium passes through, the pressure difference of the piston (103) is not enough to enable lubricating oil to seep out of the damping hole (112), and when the power medium passes through, the pressure difference borne by the piston (103) is increased, so that the lubricating oil slowly seeps out of the damping hole (112);
secondly, forcibly extruding large oil droplets seeped out of the damping holes (112) into small particles when the large oil droplets pass through the oil droplet dispersing unit (2), so that the oil droplets are dispersed more;
and thirdly, the dispersed small-particle oil column enters an oil-gas mixing unit (3), and gas and oil beads from the oil bead dispersing unit (2) generate multi-channel spiral motion through a plurality of spiral holes (303) for oil gas to pass through of the oil-gas mixing unit (3), so that gas and liquid are mixed more uniformly, and the uniform distribution of oil mist in gas entering the pneumatic screw drilling tool is guaranteed.
2. The coal mine underground pneumatic directional drilling lubricating device according to claim 1, characterized in that a first through hole (107) and a second through hole (108) are arranged in the outer pipe (101), the diameter of the first through hole (107) is larger than that of the second through hole (108), and the gap (105) is formed between the wall of the first through hole (107) and the outer wall of the inner pipe (102);
the outer wall at the two ends of the inner pipe (102) is respectively provided with a first limiting block (109) and a second limiting block (110) which are used for limiting the axial movement of the inner pipe (102), the outer diameter of the second limiting block (110) is matched with the inner diameter of the outer pipe (101), and the second limiting block (110) is provided with a third through hole (111) for allowing a power medium to pass through.
3. The underground coal mine pneumatic directional drilling lubricating device according to claim 1, wherein the diameter of the damping hole (112) is 0.2-0.5 mm.
4. The coal mine underground pneumatic directional drilling lubricating device according to claim 1, characterized in that an oil filling hole (113) communicated with the sealing cavity is arranged on the outer pipe (101).
5. The coal mine underground pneumatic directional drilling lubricating device according to claim 1, characterized in that sealing rings (114) are arranged at the contact surface of the piston (103) and the outer pipe (101) and the contact surface of the piston (103) and the inner pipe (102).
6. The underground coal mine pneumatic directional drilling lubricating device according to claim 1, characterized in that the oil drop dispersion unit (2) is of a porous structure.
7. The underground coal mine pneumatic directional drilling lubricating device according to claim 1, characterized in that the oil-gas mixing unit (3) comprises a pipe body (301) and an oil-gas mixing valve core (302) arranged in the pipe body (301), the pipe body (301) is connected to the front end of the outer pipe (101), a plurality of spiral holes (303) are formed in the oil-gas mixing valve core (302), and the axes of the adjacent two spiral holes (303) are crossed.
8. A coal mine underground pneumatic screw drill tool, which comprises a drill rod (5) and a screw drill tool (6), and is characterized by further comprising a lubricating device as claimed in any one of claims 1 to 7, wherein the lubricating device is arranged between the drill rod (5) and the screw drill tool (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010378038.8A CN111691818B (en) | 2020-05-07 | 2020-05-07 | Underground coal mine pneumatic directional drilling lubricating device and pneumatic screw drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010378038.8A CN111691818B (en) | 2020-05-07 | 2020-05-07 | Underground coal mine pneumatic directional drilling lubricating device and pneumatic screw drill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111691818A CN111691818A (en) | 2020-09-22 |
| CN111691818B true CN111691818B (en) | 2022-05-17 |
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| CN202010378038.8A Active CN111691818B (en) | 2020-05-07 | 2020-05-07 | Underground coal mine pneumatic directional drilling lubricating device and pneumatic screw drill |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112377090B (en) * | 2020-10-27 | 2022-05-10 | 中煤科工集团西安研究院有限公司 | Spray lubrication drill rod |
| CN113898399A (en) * | 2021-09-30 | 2022-01-07 | 中煤科工集团重庆研究院有限公司 | Gas-tight gas blowout preventer for coal mine drilling |
| CN115342291B (en) * | 2022-08-23 | 2024-09-13 | 中国石油天然气集团有限公司 | Automatic oiling device and method for continuous lubrication of gas drilling downhole power tool |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2531229Y (en) * | 2002-01-21 | 2003-01-15 | 陆粉干 | Rotary mixing type oil-gas balance distributing device |
| CN103643891A (en) * | 2013-12-02 | 2014-03-19 | 西南石油大学 | Large-torque combination screw drill |
| CN203963466U (en) * | 2014-05-22 | 2014-11-26 | 禾颖企业有限公司 | The pneumatic tool of autologous oiling |
| CN108468941A (en) * | 2018-04-23 | 2018-08-31 | 宣化钢铁集团有限责任公司 | A kind of multiple exit oil and gas distributor |
| CN110242215A (en) * | 2019-06-13 | 2019-09-17 | 中煤科工集团西安研究院有限公司 | The broken soft seam adjustable gas directional drilling equipment of underground coal mine and method |
-
2020
- 2020-05-07 CN CN202010378038.8A patent/CN111691818B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2531229Y (en) * | 2002-01-21 | 2003-01-15 | 陆粉干 | Rotary mixing type oil-gas balance distributing device |
| CN103643891A (en) * | 2013-12-02 | 2014-03-19 | 西南石油大学 | Large-torque combination screw drill |
| CN203963466U (en) * | 2014-05-22 | 2014-11-26 | 禾颖企业有限公司 | The pneumatic tool of autologous oiling |
| CN108468941A (en) * | 2018-04-23 | 2018-08-31 | 宣化钢铁集团有限责任公司 | A kind of multiple exit oil and gas distributor |
| CN110242215A (en) * | 2019-06-13 | 2019-09-17 | 中煤科工集团西安研究院有限公司 | The broken soft seam adjustable gas directional drilling equipment of underground coal mine and method |
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| Publication number | Publication date |
|---|---|
| CN111691818A (en) | 2020-09-22 |
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