CN110578514A - Directional construction track measuring and correcting device for rotary drill rod - Google Patents
Directional construction track measuring and correcting device for rotary drill rod Download PDFInfo
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- CN110578514A CN110578514A CN201910981888.4A CN201910981888A CN110578514A CN 110578514 A CN110578514 A CN 110578514A CN 201910981888 A CN201910981888 A CN 201910981888A CN 110578514 A CN110578514 A CN 110578514A
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- 238000010276 construction Methods 0.000 title claims abstract description 40
- 238000005553 drilling Methods 0.000 claims abstract description 43
- 238000005259 measurement Methods 0.000 claims description 13
- 230000005540 biological transmission Effects 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 7
- 238000004458 analytical method Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 14
- 239000003245 coal Substances 0.000 abstract description 7
- 238000009434 installation Methods 0.000 abstract description 2
- 238000012937 correction Methods 0.000 description 14
- 238000012360 testing method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000010721 machine oil Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
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
- E21B47/00—Survey of boreholes or wells
- E21B47/02—Determining slope or direction
- E21B47/024—Determining slope or direction of devices in the borehole
-
- 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
- E21B7/10—Correction of deflected boreholes
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (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)
- Geophysics (AREA)
- Earth Drilling (AREA)
Abstract
The invention provides a device for measuring and correcting a directional construction track of a rotary drill rod. The drilling construction is completed, the power input shaft retreats axially, the outer gear ring on the power input shaft is meshed with an inner gear ring flange of the positioning deviation rectifying cylinder to drive the positioning deviation rectifying cylinder to rotate, the power output shaft stops rotating to rectify the deviation without installing and using a screw pump under a coal mine, and the installation and the use are more convenient compared with the prior equipment; the track can be measured and the deviation is rectified in the drill rod rotation process, the power input shaft only needs to be moved backwards during deviation rectification, the deviation rectification structure is more reasonable, large-aperture directional construction in the underground coal mine becomes easier to operate, and the drilling device has the advantages of high drilling efficiency and high drilling precision.
Description
Technical Field
The invention belongs to the technical field of drill rods of drilling machines, and particularly relates to a device for measuring and correcting a directional construction track of a rotary drill rod.
background
As shown in fig. 17, according to the conventional directional drilling construction principle, the connection mode of the drill rods is as follows: the drill bit 114 is connected with the hydraulic screw pump rotor connector 113, the hydraulic screw pump rotor 112 and the hydraulic screw pump rotor connector 113 have 1.5-degree rotary oscillation, in the drilling process, the housing stator 111 of the hydraulic screw pump is not moved, the drilling machine oil cylinder 117 pushes the drilling machine power head 116 to push more drill rods, the inclinometer drill rods 118 and the drill bit 114 to drill holes, and meanwhile, the liquid medium 110 enters along the center hole of the drill rod to push the hydraulic screw pump rotor 112 to rotate to drive the hydraulic screw pump rotor connector 113 and the drill bit 114 to rotate to realize drilling. The drill rod does not rotate during the entire drilling process.
The inclination measuring and correcting system is fixed in an inclination measuring drill rod 118, the inclination measuring drill rod 118 does not rotate but only horizontally moves in the whole drilling construction process, the inclination measuring and correcting system mainly comprises a battery power supply system 101, a testing system 102, a transmitting system 103, a testing pulse wave 104, a receiving system 105, a demodulating system 106 and a terminal server 107, and the testing pulse wave 104 transmits signals by taking a liquid medium 110 as a carrier. According to the test data, the worker adjusts the position of the outer cover stator 111 of the hydraulic screw pump through the rotation of the power head 116 of the drilling machine, so that the angle of the drill bit 114 is adjusted, and the directional construction is realized.
The conventional directional drilling construction system has problems:
1. In the large-aperture construction process, if the hole is drilled more than 180mm, the length of the hydraulic screw pump is about 10-12 m, the weight is 1200kg, and the hydraulic screw pump is inconvenient to install and use underground a coal mine.
2. The liquid flow rate required by the hydraulic screw pump in the large-aperture construction process is about 300-400 liters per second, and the liquid is difficult to supply underground on the ground.
3. because the drill rod rotates, the system can not test the drill hole while drilling, and the accurate positioning construction is difficult.
4. The flat push type system can not meet the construction requirement of a soft stratum, has serious hole collapse, is easy to bury a drill and can not be treated.
at present, a drilling process method that an external power source pushes a drill rod to rotate is generally adopted in a coal mine, so that a complete set of technology for large-aperture directional construction in the coal mine is very necessary.
disclosure of Invention
in order to solve the technical problem, the invention provides a device for measuring and correcting the directional construction track of a rotary drill rod.
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
the invention adopts the following technical scheme:
in some optional embodiments, there is provided a deviation rectifying device for measuring a directional construction track of a rotary drill pipe, comprising: the device comprises a power input shaft, a power output shaft and a positioning and correcting barrel, wherein the power input shaft is arranged in the power output shaft, and the positioning and correcting barrel is sleeved outside the power input shaft and the power output shaft; when drilling, the power input shaft is in meshed transmission with the power output shaft; when the deviation is corrected, the power input shaft is in meshing transmission with the positioning deviation correcting barrel.
In some optional embodiments, the positioning correction cylinder comprises: the inner ring gear flange, the deviation rectifying positioning flange and the deviation rectifying inner cylinder are sleeved outside the power input shaft and the power output shaft; one end of the deviation rectifying inner cylinder is welded with the ring gear flange, and the other end of the deviation rectifying inner cylinder is welded with the deviation rectifying positioning flange.
In some optional embodiments, the positioning correction cylinder further comprises: the outer deviation rectifying cylinder is sleeved outside the inner deviation rectifying cylinder; a discharge channel is formed between the deviation rectifying outer cylinder and the deviation rectifying inner cylinder, and discharge holes identical to those of the discharge channel are formed in the inner gear ring flange and the deviation rectifying positioning flange.
In some optional embodiments, the power input shaft is a hollow shaft to form an inner channel of the power input shaft, and an outer gear ring matched with the inner gear ring flange plate is arranged on the outer surface of the power input shaft.
In some optional embodiments, a front chamber, a middle chamber and a rear chamber are arranged in the power output shaft, and an inner gear ring matched with the outer gear ring of the power input shaft is arranged between the middle chamber and the rear chamber.
In some optional embodiments, the apparatus for measuring and correcting a directional construction track of a rotary drill rod further includes: a universal output shaft assembly mounted on the front chamber; the universal output shaft assembly includes: preceding fixed briquetting, back compact heap and be used for the swing output shaft who is connected with the drill bit.
In some optional embodiments, the apparatus for measuring and correcting a directional construction track of a rotary drill rod further includes: an inclinometer system while drilling; the inclination measurement while drilling system comprises: the system comprises a turbine generator, a battery, a measuring system, a transmitting system, a receiver, a communication interface and a control terminal for data processing and analysis, wherein the turbine generator provides electric energy, and the measuring system transmits measuring data to the receiver through the transmitting system and uploads the measuring data to the control terminal through the receiver.
In some optional embodiments, the apparatus for measuring and correcting a directional construction track of a rotary drill rod further includes: the positioning and correcting device comprises a front fixing flange and a rear fixing flange, wherein the front fixing flange and the rear fixing flange are respectively arranged at two ends of a positioning and correcting barrel, and the positioning and correcting barrel is arranged outside the power input shaft and the power output shaft through the front fixing flange and the rear fixing flange.
In some optional embodiments, the rear fixing flange is provided with a reverse discharge hole, and a reverse discharge guide plate is welded on the rear fixing flange.
The invention has the following beneficial effects: the drilling construction is completed, the power input shaft retreats axially, the outer gear ring on the power input shaft is meshed with an inner gear ring flange of the positioning deviation rectifying cylinder to drive the positioning deviation rectifying cylinder to rotate, the power output shaft stops rotating to rectify the deviation without installing and using a screw pump under a coal mine, and the installation and the use are more convenient compared with the prior equipment; the track can be measured and the deviation is rectified in the drill rod rotation process, the power input shaft only needs to be moved backwards during deviation rectification, the deviation rectification structure is more reasonable, large-aperture directional construction in the underground coal mine becomes easier to operate, and the drilling device has the advantages of high drilling efficiency and high drilling precision.
Drawings
FIG. 1 is a schematic structural diagram of a directional construction track measurement and deviation correction device for a rotary drill rod according to the present invention;
FIG. 2 is a schematic structural diagram of an annular gear flange of the positioning correction cylinder of the present invention;
FIG. 3 is a schematic diagram of the positioning correction cylinder, the power input shaft and the power output shaft of the present invention;
FIG. 4 is a schematic diagram of the positions of the positioning correction cylinder and the inner gear ring of the power output shaft of the present invention;
FIG. 5 is a schematic structural view of an end face of the positioning and deviation rectifying barrel of the present invention;
FIG. 6 is an axial sectional view of the positioning correction cylinder of the present invention;
FIG. 7 is a schematic structural view of the power input shaft of the present invention;
FIG. 8 is a cross-sectional view of the outer ring gear of the power input shaft of the present invention;
FIG. 9 is an axial cross-sectional structural schematic view of the power take-off shaft of the present invention;
FIG. 10 is a cross-sectional structural schematic view of an inner ring gear of the power take-off shaft of the present invention;
FIG. 11 is a schematic structural view of the universal output shaft assembly of the present invention;
FIG. 12 is a schematic front elevational view of the universal output shaft assembly of the present invention;
FIG. 13 is a front view of the rear mounting flange of the present invention;
FIG. 14 is an axial cross-sectional structural view of the rear mounting flange of the present invention;
FIG. 15 is a schematic diagram of the inclination measurement while drilling system of the present invention;
FIG. 16 is a schematic view of the working principle of the deviation correcting device for measuring the directional construction track of the rotary drill rod according to the present invention;
fig. 17 is a schematic view of a conventional directional drilling construction principle.
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others.
As shown in fig. 1 to 16, there is provided a deviation correcting device for measuring a directional construction track of a rotary drill pipe, comprising: the device comprises a power input shaft 1, a power output shaft 2, a positioning deviation rectifying barrel 3, a rear fixing flange 4, a front fixing flange 5, a universal output shaft assembly 6, a drilling inclinometer system 7 and a follow-up drill rod 33.
The power input shaft 1 is arranged in the power output shaft 2, and the position is limited by a rear fixing flange 4. The positioning and deviation rectifying cylinder 3 is sleeved outside the power input shaft 1 and the power output shaft 2 and is positioned and fixed by the rear fixing flange 4 and the front fixing flange 5, the front fixing flange 5 and the rear fixing flange 4 are respectively arranged at two ends of the positioning and deviation rectifying cylinder 3, and the positioning and deviation rectifying cylinder 3 is arranged outside the power input shaft 1 and the power output shaft 2 through the front fixing flange 5 and the rear fixing flange 4, namely the power input shaft 1, the power output shaft 2 and the positioning and deviation rectifying cylinder 3 are assembled together.
the universal output shaft assembly 6 is arranged at the end part of the power output shaft 2 and is connected with the drill bit 8 to drive the drill bit 8 to rotate together. The inclinometer system 7 while drilling is installed in the power input shaft 1 or in a follow-up drill pipe 33 connected with the power input shaft 1.
As shown in fig. 5 and 6, the positioning correction cylinder 3 includes: ring gear ring flange 9, deviation rectifying positioning flange 11, deviation rectifying inner cylinder 12 and deviation rectifying outer cylinder 10. The deviation correcting inner cylinder 12 is sleeved outside the power input shaft 1 and the power output shaft 2, one end of the deviation correcting inner cylinder 12 is welded with the inner gear ring flange 9, and the other end of the deviation correcting inner cylinder 12 is welded with the deviation correcting positioning flange 11. The deviation correcting outer cylinder 10 is sleeved outside the deviation correcting inner cylinder 12, a discharge channel 13 is formed between the deviation correcting outer cylinder 10 and the deviation correcting inner cylinder 12, and the inner gear ring flange 9 and the deviation correcting positioning flange 11 are provided with discharge holes 35 which are the same as the discharge channel 13, so that discharge is facilitated.
As shown in fig. 7 and 8, the power input shaft 1 is a hollow shaft to form an inner channel 15 of the power input shaft, and the outer surface of the power input shaft is provided with an outer gear ring 14 adapted to the inner gear ring flange 9, where the adaptation means that the outer gear ring 14 of the power input shaft and the inner gear ring flange 9 of the positioning correction cylinder 3 can be engaged to drive the positioning correction cylinder 3 to rotate.
as shown in fig. 9 and 10, a front chamber 16, a middle chamber 17 and a rear chamber 19 are formed in the power output shaft 2, an inner gear ring 18 adapted to the outer gear ring 14 of the power input shaft is arranged between the middle chamber 17 and the rear chamber 18, and the adaptation means that the inner gear ring 18 of the power output shaft 2 can be meshed with the outer gear ring 14 of the power input shaft, so that the power input shaft 1 drives the power output shaft 2 to rotate.
As shown in fig. 11 and 12, the universal output shaft assembly 6 includes: a front fixed pressing block 21, a rear pressing block 22 and a swing output shaft 20 for connecting with the drill bit 8. The universal output shaft assembly 6 is connected with the power output shaft 2 through the rear pressing block 22 in a bolt mode, namely the universal output shaft assembly 6 is installed on the front cavity 16, and when the power output shaft 2 rotates, the universal output shaft assembly 6 is driven to rotate, so that the drill bit 8 is driven to rotate. The swing output shaft 20 is in spherical fit with the front fixed pressing block 22 and the rear pressing block 21, the swing output shaft 20 is matched with the front fixed pressing block 21 and the rear pressing block 22 through a universal joint for use, so that the universal output shaft assembly 6 is used as a universal coupling to connect the power output shaft 2 and the drill bit 8 together, and therefore the swing output shaft 20 and the front fixed pressing block 22 have a certain angle of rotation swing angle alpha.
As shown in fig. 13 and 14, the rear mounting flange 4 is provided with a reverse discharge hole 23, and a reverse discharge guide plate 24 is welded on the rear mounting flange 4 for facilitating reverse discharge.
as shown in fig. 15, the inclinometer while drilling system 7 adopts a drilling fluid pressure pulse method to transmit drilling information in the form of pressure pulses through a channel, and comprises the following steps: turbine generator 25, battery 26, measurement system 27, transmission system 28, receiver 30, communication interface 31 and control terminal 32 for data processing analysis. The inclinometer system 7 is powered by a turbine generator 25 and wirelessly communicates by positive pulse grouting waves 29. The medium 34 flows through the power input shaft inner channel 15 to push the turbine generator 25 to generate electricity and charge the battery 26, the battery 26 supplies power to the measuring system 27 and the transmitting system 28, the measuring system 27 is tested and drilled to form a positive pulse grouting wave 29, the medium 34 is used as a carrier to be transmitted out from the follow-up drill rod 33, the receiver 30 receives the positive pulse grouting wave 29 and provides the positive pulse grouting wave 29 for the communication interface 31 to the control terminal 32, and the control terminal 32 completes the total calculation of the system and calculates the offset of the initial data. The measurement system 27, the transmission system 28, the receiver 30, the communication interface 31 and the control terminal 32 all adopt the devices used in the conventional inclinometer while drilling system, and therefore the detailed structure is not described herein. The turbine generator 25 is adopted, so that the inconvenience of reciprocating disassembly and charging of the battery 26 is avoided, and the construction time is ensured; the inclinometer system 7 while drilling adopts positive pulse grouting wireless communication to transmit test data, and the system is powered by the turbine generator 25, so that the power supply of the underground construction system is ensured, and the construction is not influenced by the battery capacity.
The invention relates to a working process of a directional construction track measurement and deviation correction device of a rotary drill rod, which comprises the following steps:
and (3) medium transmission cooling: the medium 34 enters the power input shaft inner channel 15 from the follow-up drill rod inner channel 36, flows through the power output shaft middle chamber 17 and the front chamber 16, enters the drill bit 8 through the universal output shaft inner channel 37, and cools the drill bit 8 in the drilling process.
Drilling by a drilling machine: the power input shaft 1 is driven to rotate along with the advancing drill rod 33, the outer gear ring 14 of the power input shaft is meshed with the inner gear ring 18 of the power output shaft to drive the power output shaft 2 to rotate, and the power output shaft 2 drives the drill bit 8 to rotate through the universal output shaft assembly 6 to realize drilling construction.
measurement while drilling process: the medium 34 flows through the power input shaft inner channel 15 to push the turbine generator 25 to generate electricity and charge the battery 25, the battery 25 supplies power to the measuring system 27 and the transmitting system 28, the measuring system 27 is tested and drilled to form a positive pulse grouting wave 29, the medium 34 is used as a carrier to be transmitted out from the follow-up drill rod 33, the receiver 30 receives the positive pulse grouting wave 29 and provides the positive pulse grouting wave to the communication interface 31 to the control terminal 32, and the control terminal 32 completes the total calculation of the system and calculates the offset of the initial data.
Directional rectification: according to the calculation data provided by the inclinometer system while drilling 7, if the calculated value deviates from the initial measured value, the drill rod 33 moves back along with the drill rod to drive the power input shaft 1 to move back, the outer gear ring 14 of the power input shaft is meshed with the inner gear ring flange 9 of the positioning correction barrel 3, the drill rod 33 rotates along with the drill rod to drive the power input shaft 1 to rotate so as to drive the positioning correction barrel 3 to rotate, the power output shaft 2 stops to correct the deviation, the drill rod 33 moves forward along with the corrected deviation to drive the power input shaft 1 to be meshed with the inner gear ring 18 of the power output shaft so as to drive the power output shaft 2 to rotate, and drilling is.
The deviation correction is realized by utilizing a certain angle rotation swing angle between the swing output shaft 20 on the universal output shaft assembly 6 and the central axis of the power output shaft 2.
Those of skill would further appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure.
Claims (9)
1. Deviation correcting device is measured to directional construction orbit of rotatory drilling rod, its characterized in that includes: the device comprises a power input shaft, a power output shaft and a positioning and correcting barrel, wherein the power input shaft is arranged in the power output shaft, and the positioning and correcting barrel is sleeved outside the power input shaft and the power output shaft; when drilling, the power input shaft is in meshed transmission with the power output shaft; when the deviation is corrected, the power input shaft is in meshing transmission with the positioning deviation correcting barrel.
2. the rotary drill pipe directional construction track measurement deviation correcting device of claim 1, wherein the positioning deviation correcting barrel comprises: the inner ring gear flange, the deviation rectifying positioning flange and the deviation rectifying inner cylinder are sleeved outside the power input shaft and the power output shaft; one end of the deviation rectifying inner cylinder is welded with the ring gear flange, and the other end of the deviation rectifying inner cylinder is welded with the deviation rectifying positioning flange.
3. The rotary drill pipe directional construction track measurement deviation correcting device of claim 2, wherein the positioning deviation correcting barrel further comprises: the outer deviation rectifying cylinder is sleeved outside the inner deviation rectifying cylinder; a discharge channel is formed between the deviation rectifying outer cylinder and the deviation rectifying inner cylinder, and discharge holes identical to those of the discharge channel are formed in the inner gear ring flange and the deviation rectifying positioning flange.
4. The device for measuring and correcting the directional construction track of the rotary drill rod according to claim 2 or 3, wherein the power input shaft is a hollow shaft to form an inner channel of the power input shaft, and an outer gear ring matched with the inner gear ring flange is arranged on the outer surface of the power input shaft.
5. The device for measuring and correcting the directional construction track of the rotary drill rod according to claim 4, wherein a front chamber, a middle chamber and a rear chamber are arranged in the power output shaft, and an inner gear ring matched with an outer gear ring of the power input shaft is arranged between the middle chamber and the rear chamber.
6. the rotary drill rod directional construction track measurement deviation correcting device of claim 5, further comprising: a universal output shaft assembly mounted on the front chamber; the universal output shaft assembly includes: preceding fixed briquetting, back compact heap and be used for the swing output shaft who is connected with the drill bit.
7. The rotary drill pipe directional construction track measurement deviation correcting device of claim 1 or 6, further comprising: an inclinometer system while drilling; the inclination measurement while drilling system comprises: the system comprises a turbine generator, a battery, a measuring system, a transmitting system, a receiver, a communication interface and a control terminal for data processing and analysis, wherein the turbine generator provides electric energy, and the measuring system transmits measuring data to the receiver through the transmitting system and uploads the measuring data to the control terminal through the receiver.
8. The rotary drill pipe directional construction track measurement deviation correcting device of claim 7, further comprising: the positioning and correcting device comprises a front fixing flange and a rear fixing flange, wherein the front fixing flange and the rear fixing flange are respectively arranged at two ends of a positioning and correcting barrel, and the positioning and correcting barrel is arranged outside the power input shaft and the power output shaft through the front fixing flange and the rear fixing flange.
9. The device for measuring and correcting the directional construction track of the rotary drill rod as claimed in claim 8, wherein the rear fixing flange is provided with a reverse discharge hole, and a reverse discharge guide plate is welded on the rear fixing flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910981888.4A CN110578514A (en) | 2019-10-16 | 2019-10-16 | Directional construction track measuring and correcting device for rotary drill rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910981888.4A CN110578514A (en) | 2019-10-16 | 2019-10-16 | Directional construction track measuring and correcting device for rotary drill rod |
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| CN110578514A true CN110578514A (en) | 2019-12-17 |
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| CN201910981888.4A Pending CN110578514A (en) | 2019-10-16 | 2019-10-16 | Directional construction track measuring and correcting device for rotary drill rod |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111911068A (en) * | 2020-08-20 | 2020-11-10 | 旺坤(北京)科技有限公司 | Downhole electric drilling |
| CN113236225A (en) * | 2021-05-19 | 2021-08-10 | 中国石油大学(华东) | Coal mine drilling deviation early warning sensor system and drilling deviation rectifying method |
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