CN109944543A - A kind of Sampling driller - Google Patents
A kind of Sampling driller Download PDFInfo
- Publication number
- CN109944543A CN109944543A CN201910286686.8A CN201910286686A CN109944543A CN 109944543 A CN109944543 A CN 109944543A CN 201910286686 A CN201910286686 A CN 201910286686A CN 109944543 A CN109944543 A CN 109944543A
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- rotation axis
- drill bit
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- 238000005070 sampling Methods 0.000 title claims abstract description 43
- 230000007246 mechanism Effects 0.000 claims abstract description 76
- 238000005553 drilling Methods 0.000 claims abstract description 69
- 239000011159 matrix material Substances 0.000 claims abstract description 30
- 239000012530 fluid Substances 0.000 claims abstract description 21
- 238000007789 sealing Methods 0.000 claims description 6
- 238000009527 percussion Methods 0.000 abstract description 5
- 230000009471 action Effects 0.000 abstract description 3
- 239000011435 rock Substances 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 5
- 230000000007 visual effect Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000010437 gem Substances 0.000 description 1
- 229910001751 gemstone Inorganic materials 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000012428 routine sampling Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
Abstract
The invention discloses a kind of Sampling drillers, it is related to technical field of geological exploration, its key points of the technical solution are that, it further include being arranged in the intracorporal driving mechanism of base, first the second drilling mechanism of drilling mechanism and beater mechanism including being driven by a motor the matrix of rotation, being set to the intracorporal drill bit of base and sampler.Driving mechanism can rotate under the hydraulic action of drill-in fluid, can provide partial power source for Sampling driller；Driving mechanism drives the rotation of the first drilling mechanism, the cooperation reciprocating percus-sion that first drilling mechanism passes through beater mechanism in turn is connected with the second drilling mechanism of drill bit, so that impact of second drilling mechanism by high frequency time, the impact force is transmitted to after drill bit and expeditiously creeps into rock stratum conducive to drill bit, external force bit pressure needed for making drill bit is effectively reduced, the stress that drilling rod can not only be reduced prevents drilling rod from fatigue rupture occurs because of excessive bit pressure, the use for reducing heavy-duty motor simultaneously, effectively reduces cost.
Description
Technical field
It is the present invention relates to technical field of geological exploration, in particular to a kind of to be taken for what exploration under the conditions of hardpan sampled
Sample drilling tool.
Background technique
Due to resource exploration and the demand of scientific research, sampling operation under the conditions of Different Strata increasingly rises.
For the sampling process on the stratum in geological prospecting, routine sampling mode is to be applied using mechanical pressurization mode to drilling rod
Plus-pressure, so that being sampled again to subterranean formation zone behind Sampling driller indentation stratum.
Inventors have found that conventional mechanical pressurization mode Sampling driller for soft or hard stratum or hardpan, holds
The bending even breakage phenomenon for easily causing drilling rod, can not only slow down the speed of drilling, but also be easy to cause collapsing for borehole formation,
It is unfavorable for going on smoothly for sampling.In addition, conventional Sampling driller usually requires to be equipped with powerful motor to drive, provide compared with
Big bit pressure, sampling cost correspondingly increase.
Summary of the invention
It is low with driving power, low energy consumption and drilling efficiency is high the object of the present invention is to provide a kind of Sampling driller
Advantage.
Above-mentioned technical purpose of the invention has the technical scheme that
A kind of Sampling driller, including being driven by a motor the matrix of rotation, being set to the intracorporal drill bit of base and sampler, feature
It is: further includes being set in described matrix:
Driving mechanism, the negotiable drill-in fluid of driving mechanism, driving mechanism include power device, and power device includes being driven by drill-in fluid
The dynamic stator and rotor for driving rotation；
First drilling mechanism, including rotation axis and impact groove, rotation axis are driven by power device and are rotated, and impact groove utilizes elastic component
Connection can move back and forth on the rotating shaft along the central axial direction of matrix；
Second drilling mechanism, is mounted on matrix, and drill bit and sampler are connected on the second drilling mechanism；
Beater mechanism, including the first connector and the second connector, first connector are removably attachable to described first
On the impact groove of drilling mechanism, second connector is connected in described matrix, and the first connector is moved axially with impact groove
It hits the second drilling mechanism and utilizes elastic component reciprocal.
By using above-mentioned technical proposal, driving mechanism can rotate under the hydraulic action of drill-in fluid, can be auger
Tool provides partial power source；Driving mechanism drives the rotation of the first drilling mechanism, and the first drilling mechanism passes through beater mechanism in turn
Cooperation reciprocating percus-sion is connected with the second drilling mechanism of drill bit, so that impact of second drilling mechanism by high frequency time, the impact
Power is transmitted to after drill bit and expeditiously creeps into rock stratum conducive to drill bit, and external force bit pressure needed for making drill bit is effectively reduced, not only
The stress that can reduce drilling rod prevents drilling rod from fatigue rupture occurs because of excessive bit pressure, while reducing making for heavy-duty motor
With effectively reducing cost.
Further setting: the power device has the runner of negotiable drill-in fluid；The rotation axis has the first flowing
Cavity, the impact groove are set in the first flow cavity, have flow clearance between the impact groove and the rotation axis；It is described
Impact groove has the second flow cavity；
The runner, first flow cavity and second flow cavity are sequentially communicated, the runner, first flowing
Cavity, second flow cavity and the flow clearance collectively form driving runner.
By using above-mentioned technical proposal, drill bit side can smoothly be flowed to by driving runner that drill-in fluid both may be implemented,
Power is provided for power device, so that the stator of power device and rotor generate spinning movement, provides portion for Sampling driller
Sub-power source reduces general power.
Further setting: the impact groove is staggeredly spaced along the central axial direction of described matrix with the rotation axis and sets
It sets.
By using above-mentioned technical proposal, impact groove is moved back and forth along the central axial direction of matrix.
Further setting: second drilling mechanism has movable cavity, and the sampler is connected by elastic piston
In in the movable cavity.
By using above-mentioned technical proposal, sampler is connected in movable cavity, is hidden on the inside of matrix, is avoided taking
Sampling device is impacted.
Further setting: the movable cavity is connected to driving runner, and the movable cavity is connected to the drill bit.
By using above-mentioned technical proposal, it is ensured that drill-in fluid energy conveying device drill bit side.
Further setting: the rotation axis is connected to described matrix by bearing；The stator is connected to the rotation axis,
The rotor is connected to the stator.
By using above-mentioned technical proposal, fluxion strap turn of drill-in fluid is rotated, and rotor and stator have interaction relation,
By rotation linkage stator rotation, stator is connected to rotation axis, the axis that finally interlocks with the rotation rotation.
Further setting: the rotor is turbine rotor, and the stator is turbine stator.
Further setting: described matrix includes the first shell being sequentially communicated, second shell and third shell, first shell
Body, second shell and third shell, which pass sequentially through, is threadedly engaged connection.
By using above-mentioned technical proposal, subsection setup makes the intracorporal driving mechanism of base, the first drilling mechanism and second
The space layout of drilling mechanism and beater mechanism is more reasonable, facilitates the dismounting of each mechanism.
Further setting: locating piece, locating piece and third are additionally provided between second drilling mechanism and third shell
Sealing ring is provided between shell.
By using above-mentioned technical proposal, sealing ring can prevent the leakage of drill-in fluid.
Further setting: fluorine rubber is provided between second drilling mechanism and third shell and positioned at the lower end of locating piece
Glue, fluorubber fit closely the inner wall of locating piece, the outer wall of the second drilling mechanism and third shell.
By using above-mentioned technical proposal, fluorubber can buffer the friction between the second drilling mechanism and shell, in turn
Protect sampler from the impact of greater impact power.
In conclusion the invention has the following advantages: be capable of providing hydraulic rotating impact and axial impact, be convenient for
The fast drilling of drill bit effectively increases the working efficiency of sampling operation.Drill-in fluid can drive the first drilling mechanism to transport simultaneously
It is dynamic, to provide additional power, so that the power of required motor is reduced accordingly, effectively reduce sampling cost.It takes
Sampling device is resiliently attached in movable cavity, effectively prevents the interference of greater impact power, so that sampling operation is gone on smoothly.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of Sampling driller；
Fig. 2 is structural schematic diagram of first connector under the first visual angle；
Fig. 3 is structural schematic diagram of first connector under the second visual angle；
Fig. 4 is structural schematic diagram of second connector under the first visual angle；
Fig. 5 is structural schematic diagram of second connector under the second visual angle.
In figure, 10, Sampling driller；20, matrix；22, first shell；24, second shell；26, third shell；30, it samples
Device；40, drill bit；
100, driving mechanism；130, power device；102, runner；103, locating shoulder；110, rotor；120, stator；
200, the first drilling mechanism；210, rotation axis；220, impact groove；212, the first flow cavity；222, the second flow cavity；
231, first through hole；232, the second through-hole；233, flow clearance；234, intercommunicating pore；
300, the second drilling mechanism；301, deflector hole；302, movable cavity；303, inclined hole；
50, beater mechanism；501, the first connector；502, the second connector；400, locating piece；500, fluorubber；600, elastic
Piston；601, discharge orifice；70, bearing；80, sealing ring.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
The first embodiment:
A kind of Sampling driller, as shown in Figure 1, Sampling driller 10 is including drill bit 40, matrix 20 and taking in matrix 20 is arranged in
Sampling device 30, driving mechanism 100, the first drilling mechanism 200, the second drilling mechanism 300 and beater mechanism 50.
Matrix 20 includes first shell 22, second shell 24 and the third shell 26 being sequentially communicated, first shell 22, second
Shell 24 and third shell 26, which pass sequentially through, is threadedly engaged connection.22 upper end outer wall of first shell is externally threaded, and utilizes first
The external drilling motor in the top of shell 22,26 lower end of third shell are tapped with internal screw thread, and drill bit is mounted on the lower end of third shell 26.
It should be noted that in the present embodiment, matrix 20 is by sequentially connected first shell 22, second shell 24 and
The structure type of three shells 26 composition is the preferred structure to the present embodiment, the concrete form of matrix 20 is not limited, at it
In his specific embodiment, matrix 20 can also only be made of a shell or be made of two or more shells.
Driving mechanism 100 includes power device 130, and power device 130 includes rotor 110 and stator 120, and wherein rotor is
Turbine rotor, stator are turbine stator.The inner wall of 22 upper part of first shell is equipped with locating shoulder 103, turbine rotor and whirlpool
On the locating shoulder 103 that the blade of wheel stator is resisted against in first shell 22 after instead filling.Have between turbine stator and turbine rotor
There is runner 102, drill-in fluid flows into Sampling driller 10 from the upper end opening of first shell 22, flows into from 22 upper end of first shell
Drill-in fluid flows into runner 102, and turbine rotor can drive turbine stator to rotate under the driving of drill-in fluid.
In the present embodiment, the quantity of turbine rotor and turbine stator is multiple, multiple turbine rotors and multiple turbine stators
Constitute turbine apparatus, it should be noted that the present invention does not limit the turbine stator of turbine apparatus and the quantity of turbine rotor, i.e.,
Turbine series, in other specific embodiments, turbine series can be multistage.
First drilling mechanism 200 includes rotation axis 210 and impact groove 220.The upper part of rotation axis 210 by bolt and
Nut cooperation is fixed on turbine stator, is fixed on the so that turbine rotor and turbine stator are resisted against after locating shoulder 103
On one shell 22.210 end portion of rotation axis is movably connected on second shell 24 by bearing 700.The axle center of rotation axis 210 has
There is the first flow cavity 212, the lower end peripheral wall of rotation axis 210 offers first through hole 231, and the first flow cavity 212, first is logical
Hole 231 is connected to runner 102.
In the present embodiment, the quantity of bearing 700 is four, and the axis direction along matrix 20 is arranged.Bearing 700 is for buffering
Friction between rotation axis 210 and second shell 24, it should be noted that the particular number of the present invention not limited bearing 700,
In other specific embodiments, the quantity of bearing 700 can also be one or more.
Impact groove 220 is set in the first flow cavity 212, and 220 upper end of impact groove is connected to rotation axis by elastic component
210 on the inner wall of 212 upper end of the first flow cavity.Elastic component is spring.There is stream between impact groove 220 and rotation axis 210
Dynamic gap 233, part of the impact groove 220 in the first flow cavity 212 is with rotation axis 210 in the central axis side along matrix 20
To staggeredly interval setting, cooperation spring connection enables impact groove 220 to move back and forth along the central axial direction of matrix 20,
The lower end of impact groove 220 passes through the first flow cavity 212 and is placed in third shell 26.
The axle center of impact groove 220 has the second flow cavity 222, and the second flow cavity 222 and the first flow cavity 212 connect
Logical, the upper end peripheral wall of impact groove 220 offers the second through-hole 232, and the lower end of impact groove 220 offers intercommunicating pore 234.Runner
102, first through hole 231, the first flow cavity 212, the second flow cavity 222, the second through-hole 232 and flow clearance 233 are common
Driving runner 102 is constituted, driving runner 102 is connected to third shell 26.
Second drilling mechanism 300 is set in third shell 26, and the second drilling mechanism 300 is upper end cone, lower end ladder
The structure of shape cylinder, 300 upper end end face of the second drilling mechanism be horizontal plane, upper end end face offer deflector hole 301 and with flowing
The inclined hole 303 that gap 233 is connected to, upper end end face and the lower end surface of impact groove 220 are in the same size.
Second drilling mechanism 300 has movable cavity 302, and movable cavity 302 includes the cavity opened up in the cone of upper end
And the intracorporal cavity of the trapezoidal cylinder in lower end, 30 upper end of sampler are connected under the second drilling mechanism 300 by elastic piston 600
The intracorporal inner wall of trapezoidal cylinder is held, 30 lower end of sampler is resisted against drill bit 40 by elastic piston 600, wherein the yielding movable of upper end
Plug 600 is radial to have discharge orifice 601, and sampler 30 can be probe tube or sampling box.302 upper part of movable cavity and drive
Dynamic runner 102 is connected to, and 302 end portion of movable cavity is connected to drill bit 40.
Second drilling mechanism, 300 lower end outer wall is externally threaded, and the second drilling mechanism 300 is by being threadedly engaged removably
It is connected to the lower end of third shell 26.
Locating piece 400, locating piece are additionally provided between third shell 26 in the trapezoidal cylinder of second drilling mechanism 300
Sealing ring 800 is provided between 400 and third shell 26, sealing ring 800 can prevent the leakage of drill-in fluid.
Lower end in the trapezoidal cylinder of second drilling mechanism 300 between third shell 26 and positioned at locating piece 400 is arranged
There is a fluorubber 500, fluorubber 500 is equipped with opening, and fluorubber 500 fits closely locating piece 400, the outer wall of trapezoidal cylinder and the
The inner wall of three shells 26, fluorubber 500 can buffer the friction between the second drilling mechanism 300 and shell, and then protect sampling
Impact of the device 30 from greater impact power.
As shown in Figures 1 to 5, beater mechanism includes the first connector 400 and the second connector 500, wherein the first connection
Part 400 is overhead cam, and the second connector 500 is lower cam.First connector 501 and the second connector 502 are upper lower cams
Fit structure is moved, opposite second connector 502 of the first connector 501 can be realized and do reciprocating linear motion.Second connector
502 are connected on third shell 26, and the second drilling mechanism 300 is fixed on third shell 26.First connector 501 passes through screw thread
It is connected to the lower end shaft shoulder of impact groove 220, impact groove 220 is connected to rotation axis 210 by spring, and rotation axis 210 is fixed on whirlpool
It takes turns on stator.Turbine stator and turbine rotor are rotated by the fluxion strap turn moving axis 210 of drill-in fluid, rotation axis 210 and then drive
Impact groove 220 rotates.Since the first connector 501 is connected to impact groove 220, so that impact groove 220 is existing to come from turbine
Rotational power, and have the impact force of the cam engagement between the first connector 501 and the second connector 502, impact groove 220
It is capable of the upper surface of the second drilling mechanism of reciprocating percus-sion 300, the rotary impact effect of high frequency time is provided.
Specifically, in use, 22 upper end of first shell connects drilling motor, Sampling driller 10 is under the driving of drilling motor
It drives drill bit 40 to creep into, while being flowed into drill-in fluid by first shell 22 by liquid pump, drill-in fluid flows successively through driving runner 102
With movable cavity 302, finally flowed out by the jewel hole of drill bit 40.Turbine rotor can rotate under the hydraulic action of drill-in fluid, into
And turbine stator is driven to rotate, partial power source can be provided for Sampling driller 10, the use power of drilling motor is set
Setting smaller can meet working condition requirement；Turbine stator drives rotation axis 210 to rotate, 220 turns of impact groove of rotation axis 210 and then drive
It is dynamic, the first connector 400 connect with impact groove 220 by with the mutual cooperation of the second connector 500, enable impact groove 220
The upper end end face of enough the second drilling mechanisms of reciprocating percus-sion 300, so that impact of second drilling mechanism 300 by high frequency time, the punching
Hitting makes drill bit 40 after power is transmitted to drill bit 40 while generating high-frequency percussion power and rotary force, expeditiously creeps into rock conducive to drill bit 40
Layer, the stress for reducing drilling rod prevents drilling rod from fatigue rupture occurs because of excessive bit pressure, while reducing drilling time, effectively mentions
High drilling efficiency, and then improve sampling efficiency.
After completing sampling work, propose that Sampling driller 10, unscrewing drill bit 40 can remove sampler 30.
Another embodiment: the difference is that, the rotor 110 in Sampling driller 10 is with the first embodiment
Screw motor rotor 110, stator 120 are screw motor stator 120.
The above embodiments are only explanation of the invention, are not limitation of the present invention, those skilled in the art
Member can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as at this
All by the protection of Patent Law in the scope of the claims of invention.
Claims (10)
1. a kind of Sampling driller, it is characterised in that: including being driven by a motor the matrix (20) of rotation, being set in matrix (20)
Drill bit (40) and sampler (30) further include being set in described matrix (20):
Driving mechanism (100), driving mechanism (100) negotiable drill-in fluid, driving mechanism (100) include power device (130), are moved
Power device (130) includes that the stator (120) and rotor (110) that drive rotation are driven by drill-in fluid；
First drilling mechanism (200), including rotation axis (210) and impact groove (220), rotation axis (210) are driven by power device
Rotation, impact groove (220) is connected on rotation axis (210) using elastic component can be reciprocal along the central axial direction of matrix (20)
It is mobile；
Second drilling mechanism (300) is mounted on matrix (20), and drill bit (40) and sampler (30) are connected to the second drilling
In mechanism (300)；
Beater mechanism (50), including the first connector (400) and the second connector (500), first connector (400) are removable
It is connected to unloading on the impact groove (220) of first drilling mechanism, second connector (500) is connected to described matrix
(20) on, the first connector (400) is moved axially with impact groove (220) to be hit the second drilling mechanism (300) and utilizes elastic component
Back and forth.
2. a kind of Sampling driller according to claim 1, it is characterised in that: the power device has negotiable drill-in fluid
Runner (102)；The rotation axis (210) has the first flow cavity (212), and the impact groove (220) is set to first-class
In dynamic cavity (212), have flow clearance (233) between the impact groove (220) and the rotation axis (210)；The impact groove
(220) there are the second flow cavity (222)；
The runner (102), first flow cavity (212) and second flow cavity (222) are sequentially communicated, the stream
Road (102), first flow cavity (212), second flow cavity (222) and the flow clearance (233) common structure
At driving runner (102).
3. a kind of Sampling driller according to claim 2, it is characterised in that: the impact groove (220) and the rotation axis
(210) setting is staggeredly spaced along the central axial direction of described matrix (20).
4. a kind of Sampling driller according to claim 1, it is characterised in that: second drilling mechanism (300), which has, to be lived
Dynamic cavity (302), the sampler (30) are connected in the movable cavity (302) by elastic piston (600).
5. Sampling driller according to claim 4, it is characterised in that: the movable cavity (302) and driving runner (102)
Connection, the movable cavity (302) are connected to the drill bit (40).
6. a kind of Sampling driller according to claim 1, it is characterised in that: the rotation axis (210) passes through bearing (700)
It is connected to described matrix (20)；The stator (120) is connected to the rotation axis (210), and the rotor (110) is connected to described
Stator (120).
7. a kind of Sampling driller according to claim 6, it is characterised in that: the rotor (110) is turbine rotor, described
Stator (120) is turbine stator.
8. a kind of Sampling driller according to claim 1, it is characterised in that: described matrix (20) includes be sequentially communicated
One shell (22), second shell (24) and third shell (26), first shell (22), second shell (24) and third shell (26)
It passes sequentially through and is threadedly engaged connection.
9. a kind of Sampling driller according to claim 1, it is characterised in that: second drilling mechanism (300) and third
It is additionally provided between shell (26) locating piece (400), is provided with sealing ring between locating piece (400) and third shell (26)
(80)。
10. a kind of Sampling driller according to claim 9, it is characterised in that: second drilling mechanism (300) and third
It is provided with fluorubber (500) between shell (26) and positioned at the lower end of locating piece (400), fluorubber (500) fits closely positioning
The inner wall of block (400), the outer wall of the second drilling mechanism (300) and third shell (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910286686.8A CN109944543A (en) | 2019-04-10 | 2019-04-10 | A kind of Sampling driller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910286686.8A CN109944543A (en) | 2019-04-10 | 2019-04-10 | A kind of Sampling driller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109944543A true CN109944543A (en) | 2019-06-28 |
Family
ID=67014244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910286686.8A Pending CN109944543A (en) | 2019-04-10 | 2019-04-10 | A kind of Sampling driller |
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| Country | Link |
|---|---|
| CN (1) | CN109944543A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112377091A (en) * | 2020-11-11 | 2021-02-19 | 重庆科技学院 | Bundling type transfer submerged drilling tool |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105421996A (en) * | 2015-11-23 | 2016-03-23 | 西南石油大学 | Drilling tool for breaking rocks by producing compound action through rotary-percussion mode |
| CN209942734U (en) * | 2019-04-10 | 2020-01-14 | 深圳市勘察研究院有限公司 | Sampling drilling tool |
-
2019
- 2019-04-10 CN CN201910286686.8A patent/CN109944543A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105421996A (en) * | 2015-11-23 | 2016-03-23 | 西南石油大学 | Drilling tool for breaking rocks by producing compound action through rotary-percussion mode |
| CN209942734U (en) * | 2019-04-10 | 2020-01-14 | 深圳市勘察研究院有限公司 | Sampling drilling tool |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112377091A (en) * | 2020-11-11 | 2021-02-19 | 重庆科技学院 | Bundling type transfer submerged drilling tool |
| CN112377091B (en) * | 2020-11-11 | 2022-09-13 | 重庆科技学院 | Bundling type transfer submerged drilling tool |
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