CN111852444A - Lower short section for measurement while drilling near drill bit and measurement while drilling near drill bit measuring device - Google Patents
Lower short section for measurement while drilling near drill bit and measurement while drilling near drill bit measuring device Download PDFInfo
- Publication number
- CN111852444A CN111852444A CN202010531842.5A CN202010531842A CN111852444A CN 111852444 A CN111852444 A CN 111852444A CN 202010531842 A CN202010531842 A CN 202010531842A CN 111852444 A CN111852444 A CN 111852444A
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- drilling
- measurement
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- bit
- transmitting antenna
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- 238000005553 drilling Methods 0.000 title claims abstract description 108
- 238000005259 measurement Methods 0.000 title claims abstract description 61
- 239000000523 sample Substances 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 claims description 9
- 230000015572 biosynthetic process Effects 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 6
- 210000002445 nipple Anatomy 0.000 claims 3
- 239000002002 slurry Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/01—Devices for supporting measuring instruments on drill bits, pipes, rods or wirelines; Protecting measuring instruments in boreholes against heat, shock, pressure or the like
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B47/022—Determining slope or direction of the borehole, e.g. using geomagnetism
Abstract
The invention discloses a lower short section for measurement while drilling with a near drill bit and a device for measurement while drilling with a near drill bit, wherein the lower short section for measurement while drilling with a near drill bit is arranged between a motor and a drill bit, and comprises the following components: the drilling system comprises a framework, a sensor assembly and a transmitting antenna, wherein the framework is provided with the sensor assembly and the transmitting antenna, the sensor assembly is connected with the transmitting antenna, the sensor assembly is used for measuring drilling data and transmitting the drilling data to the transmitting antenna, and the transmitting antenna is used for sending the drilling data out; the battery assembly is arranged in the framework, is electrically connected with the sensor assembly and the transmitting antenna, and is used for supplying power to the sensor assembly and the transmitting antenna; the lower short section for measurement while drilling of the near drill bit is compact in structure, shorter in length and high in strength, and the measurement accuracy is improved.
Description
Technical Field
The invention relates to the field of logging while drilling, in particular to a lower short section for near-bit measurement while drilling and a near-bit measurement device while drilling.
Background
In drilling engineering such as petroleum, mines, geological exploration and the like, drilling tracks are required to be drilled more accurately according to engineering design requirements, stratum information is mastered timely and accurately to identify thin oil layers, drilling efficiency is improved, and the stratum information is transmitted to the ground in real time. Thus, the engineer can know the changes of the borehole trajectory and the formation information in time.
The traditional gamma tool for logging while drilling is generally inserted with a directional detection sensor on a tool short section of the traditional gamma tool for logging while drilling and then connected to a downhole instrument string for logging while drilling. However, in practice it has been found that logging while drilling gamma tools are located more than 10 meters from the drill bit, which results in a lag in the measured information, and therefore when an oil formation is found, often the drill bit has advanced a long distance, at which point the new formation has already been contaminated with mud, so that the accuracy of the measured formation information is greatly reduced.
Disclosure of Invention
In order to solve the technical problems, the invention provides a lower short section for measurement while drilling with a near drill bit and a device for measuring while drilling with a near drill bit.
In order to achieve the purpose of the present invention, an embodiment of the present invention provides a near-bit measurement while drilling lower sub, which is installed between a motor and a bit, and includes:
the drilling system comprises a framework, a sensor assembly and a transmitting antenna, wherein the framework is provided with the sensor assembly and the transmitting antenna, the sensor assembly is connected with the transmitting antenna, the sensor assembly is used for measuring drilling data and transmitting the drilling data to the transmitting antenna, and the transmitting antenna is used for sending the drilling data out;
and the battery component is arranged in the framework, electrically connected with the sensor component and the transmitting antenna and used for supplying power to the sensor component and the transmitting antenna.
Optionally, the skeleton is a unitary structure.
Optionally, the device further comprises an embracing cylinder, wherein the embracing cylinder is arranged on the outer side of the framework and used for fixing the framework.
Optionally, the battery assembly is detachably connected with the framework.
Optionally, the front end of the battery pack is connected with an adapter, a pressure-bearing contact pin is arranged on the adapter, and the pressure-bearing contact pin is electrically connected with the sensor assembly on the framework.
Optionally, the adapter comprises a front adapter and a rear adapter, and the front adapter is in threaded connection with the rear adapter.
Optionally, a support ring is arranged on the outer side of the front rotating connector, and the support ring is axially clamped with the inner wall of the framework.
Optionally, the support ring is keyed to the frame to limit relative rotation of the support ring and the frame.
Optionally, the outer side of the rear end of the battery assembly is sleeved with a fixing frame, and the fixing frame is in threaded connection with the inner wall of the framework.
Optionally, the transmitting antenna is a dipole antenna and adopts a manchester coding mode.
Optionally, an axial center line of the battery assembly is aligned with an axial center line of the framework.
Optionally, a mounting groove is formed in the framework, the mounting groove surrounds the periphery of the framework, and the sensor assembly is arranged in the mounting groove.
Optionally, the sensor assembly comprises a measurement sensor for measuring drilling data, a control circuit board for controlling the measurement sensor, and a wireless transmission control board for transmitting the drilling data measured by the measurement sensor to the transmitting antenna.
Optionally, the sensor assembly includes a gamma probe and/or a well deviation orientation sensor, the control circuit board includes a gamma probe control circuit board and/or a well deviation orientation sensor control circuit board, the gamma probe is used for measuring the natural gamma of the formation, the well deviation orientation sensor is used for measuring the well deviation orientation, the gamma probe control circuit board is used for controlling the gamma probe, and the well deviation orientation sensor control circuit board is used for controlling the well deviation orientation sensor.
Optionally, the transmitting antenna transmits the drilling data in the form of a wireless signal.
Optionally, the holding cylinder is in threaded connection with the framework, and a sealing ring is arranged between the holding cylinder and the framework.
The embodiment of the invention also provides a near-bit measurement while drilling device, which comprises an upper short section, a motor, the near-bit measurement while drilling lower short section and a bit, wherein the near-bit measurement while drilling lower short section and the bit are sequentially connected, the motor is used for driving the bit to drill, the near-bit measurement lower short section is used for measuring drilling data and transmitting the drilling data to the upper short section, and the upper short section is used for receiving the drilling data and transmitting the drilling data to terminal equipment.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the embodiment of the invention, the measuring point of the sensor assembly on the framework is closer to the drill bit by being arranged between the motor and the drill bit, so that the distance between the measuring point of the sensor assembly and the drill bit reaches 0.5m, and the drilling data lag measured by the sensor assembly is avoided, thereby ensuring the accuracy of instrument measurement.
2. According to the embodiment of the invention, the framework is formed into an integrated structure, so that the stability of the operation of the sensor assembly in the framework is ensured, and the sensor assembly is not influenced by external low temperature, high temperature and slurry environment.
3. According to the embodiment of the invention, the well drilling data is transmitted out in a wireless signal mode through the transmitting antenna, so that the well drilling data is transmitted more quickly.
4. The embodiment of the invention supplies power through the battery assembly, and as the battery assembly is relatively independent, more high-energy lithium batteries can be carried, so that the sufficient electric quantity is ensured, the lower short section can continuously work for 200 hours, and the continuous working time is longer.
5. The battery assembly in the embodiment of the invention is detachably connected with the framework, so that the battery assembly is convenient to detach, maintain and replace.
4. The transmitting antenna is based on a dipole antenna principle, adopts a Manchester coding mode, can work in water-based mud when the working frequency is between 300Hz and 2KHz, can work in oil-based mud when the working frequency is between 10Khz and 1MHz, and has a wireless transmission rate of 75bps, so that the transmitting antenna can be simultaneously suitable for the water-based mud and the oil-based mud.
5. The framework is fixedly supported by the holding cylinder, sealing is realized by the sealing ring, and the holding cylinder can bear the external slurry pressure of 140MPa and has a protection effect on a sensor assembly on the framework.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.
FIG. 1 is a schematic structural diagram of a lower pup joint measured while drilling by a near drill bit in an embodiment of the invention;
fig. 2 is a sectional view taken along a-a in fig. 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
The invention provides a lower short section for measurement of a near drill bit while drilling, which is arranged between a motor and a drill bit and comprises the following components:
the drilling system comprises a framework, a sensor assembly and a transmitting antenna, wherein the framework is provided with the sensor assembly and the transmitting antenna, the sensor assembly is connected with the transmitting antenna, the sensor assembly is used for measuring drilling data and transmitting the drilling data to the transmitting antenna, and the transmitting antenna is used for sending the drilling data out;
and the battery component is arranged in the framework, electrically connected with the sensor component and the transmitting antenna and used for supplying power to the sensor component and the transmitting antenna.
According to the embodiment of the invention, the measuring point of the sensor assembly on the framework is closer to the drill bit by being arranged between the motor and the drill bit, so that the distance between the measuring point of the sensor assembly and the drill bit reaches 0.5m, and the drilling data lag measured by the sensor assembly is avoided, thereby ensuring the accuracy of instrument measurement.
The embodiment of the invention provides a lower short section for measurement while drilling of a near drill bit, which is arranged between a motor and a drill bit, wherein an upper short section is connected above the motor, a receiving antenna is arranged on the upper short section, and the receiving antenna is used for receiving drilling data transmitted by the lower short section for measurement while drilling of the near drill bit and transmitting the drilling data to a terminal device on the ground through a bus of the upper short section. The lower sub for measuring the near-bit while drilling of the invention is used for measuring the drilling data and transmitting the drilling data to the receiving antenna of the upper sub.
As shown in fig. 1 and 2, the near-bit measurement while drilling lower sub of the present invention includes a backbone 2 and a battery assembly 3. The framework 2 is provided with a sensor component 5 and a transmitting antenna 4, and the sensor component 5 is connected with the transmitting antenna 4. The sensor assembly 5 is disposed in a mounting slot on the framework 2 for measuring drilling data, i.e., formation information. For example, the sensor assembly 5 includes a gamma probe for measuring the natural gamma of the formation and/or a well deviation sensor for measuring the well deviation. The sensor assembly 5 transmits the measured drilling data to the transmitting antenna 4, and the transmitting antenna 4 transmits the drilling data to the upper short section in a wireless signal mode. Battery pack 3 sets up in skeleton 2, is equipped with sensor module 5 and transmitting antenna 4 electric connection on with skeleton 2 for supply power for sensor module 5 and transmitting antenna 4.
In the embodiment of the invention, the well drilling data is sent out in a wireless signal mode through the transmitting antenna 4, so that the well drilling data is transmitted more quickly.
As shown in fig. 1 and 2, since the transmitting antenna 4 transmits the drilling data in a wireless signal manner, the transmitting antenna 4 is only required to be insulated from the framework 2. Thus, the carcass 2 can be designed as a one-piece structure. The framework 2 is of an integrated structure, so that the stability of the operation of the sensor assembly 5 in the framework 2 can be ensured, and the sensor assembly 5 is not influenced by external low temperature, high temperature and slurry environment.
As shown in fig. 1, the embodiment of the present invention further includes a cylinder 1, where the cylinder 1 is cylindrical, and the cylinder 1 is disposed outside the framework 2 and used for fixing the framework 2. An accommodating cavity is arranged in the holding cylinder 1, and the framework 2 is fixed in the accommodating cavity.
As shown in fig. 1, the battery assembly 3 is cylindrical, and the axial center line of the battery assembly 3 and the axial center line of the framework 2 are on the same straight line, so that the stability of power supply is ensured. Battery pack 3 can be dismantled with skeleton 2 and be connected, the dismantlement maintenance and the change of the battery pack 3 of being convenient for.
As shown in fig. 1, the front end of the battery pack 3 is connected with the adapter 6, the adapter 6 comprises a front adapter 601 and a rear adapter 602, and the front adapter 601 and the rear adapter 602 are in threaded connection, so that the processing and the installation are convenient. Be provided with the pressure-bearing contact pin on adapter 6, sensor module electric connection on pressure-bearing contact pin and the skeleton 2, the pressure-bearing contact pin is used for realizing electric connection with the sensor module on battery pack 3 and the skeleton 2, makes battery pack 3 can be for the sensor module power supply.
As shown in fig. 1, a support ring 7 is disposed on an outer side of a front connector 601 of the adapter 6, a step is disposed on an inner wall of the framework 2, and the support ring 7 is connected with the step on the framework 2 in a clamping manner, so that the front connector 601 is connected with the inner wall of the framework 2 in an axial direction in a clamping manner. The support ring 7 is keyed to the inner wall of the frame 2, thereby limiting the relative rotation of the front hinge 601 and the frame 2.
As shown in fig. 1, the fixing frame 8 is sleeved outside the rear end of the battery assembly 3, and the fixing frame 8 is in threaded connection with the inner wall of the framework 2, so that the rear end of the battery assembly 3 is fixed on the framework 2. The battery assembly 3 is fixed in the frame 2 by a support ring 7 and a fixing frame 8, and is centered in the frame 2. The battery component 3 is mainly responsible for supplying power to the whole instrument, can carry more high-energy lithium batteries due to relative independence, can continuously work for 200 hours, and has longer continuous working time.
As shown in fig. 1, the transmitting antenna 4 is a dipole antenna and employs manchester encoding. The wireless transmission rate of the transmitting antenna 4 can reach 75bps, when the working frequency of the transmitting antenna 4 is between 300Hz and 2KHz, the transmitting antenna can work in water-based mud, and when the working frequency of the transmitting antenna 4 is between 10Khz and 1MHz, the transmitting antenna can work in oil-based mud, so that the invention can be simultaneously suitable for the water-based mud and the oil-based mud.
As shown in fig. 1, the holding cylinder 1 is in threaded connection with the framework 2, and a sealing ring is arranged between the holding cylinder 1 and the framework 2, and is used for sealing a gap between the holding cylinder 1 and the framework 2. The holding cylinder 1 can bear the external slurry pressure of 140MPa, so that the sensor component 5 on the framework 2 is protected.
As shown in fig. 2, the framework 2 is provided with a mounting groove, the mounting groove is arranged around the framework 2, and the mounting groove is internally provided with a sensor component 5. The sensor assembly 5 comprises a measurement sensor for measuring drilling data, a control circuit board for controlling the measurement sensor, and a wireless transmission control board for transmitting the drilling data measured by the measurement sensor to the transmitting antenna.
Specifically, the framework 2 is provided with a first mounting groove, a second mounting groove, a third mounting groove, a fourth mounting groove, a fifth mounting groove and a sixth mounting groove which are 6 mounting grooves in total. The measurement sensor comprises a gamma probe 9 and a well deviation position sensor 10, and the control circuit board comprises a gamma probe control circuit board 11 and a well deviation position sensor control circuit board 12. A gamma probe tube 9 is respectively placed in the first mounting groove and the second mounting groove, and the combination of the two gamma probe tubes 9 can more accurately measure the natural gamma of the surrounding stratum, so that the measurement accuracy is ensured. A gamma detection tube control circuit board 11 for controlling the gamma detection tube 9 is arranged in the third mounting groove. A well deviation azimuth sensor 10 is arranged in the fourth mounting groove, the well deviation azimuth sensor 10 comprises a triaxial accelerometer and a fluxgate sensor, the well deviation azimuth of the instrument can be accurately measured, the measurement precision of static well deviation reaches +/-0.1 degrees, and the measurement precision of an azimuth sector can reach +/-0.2 degrees. A well deviation orientation sensor control circuit board 12 for controlling the well deviation orientation sensor 10 is arranged in the fifth mounting groove. A wireless transmission control board 13 is arranged in the sixth mounting groove, the wireless transmission control board 13 carries out primary drilling data to the gamma probe control circuit board 11 and the well deviation azimuth sensor control circuit board 12 every 30 seconds, the drilling data are packaged and transmitted to a transmitting antenna, the transmitting antenna sends out the drilling data transmitted by the wireless transmission control board 13 in a wireless signal mode, meanwhile, a receiving antenna of the upper short section receives signals in the same mode, the drilling data are transmitted to the ground through a series of operations such as identification, verification, decoding and the like, and wireless cross transmission of the drilling data is completed
According to the embodiment of the invention, the measuring point of the sensor assembly on the framework is closer to the drill bit by being arranged between the motor and the drill bit, so that the distance between the measuring point of the sensor assembly and the drill bit reaches 0.5m, and the drilling data lag measured by the sensor assembly is avoided, thereby ensuring the accuracy of instrument measurement.
The embodiment of the invention also provides a near-bit measurement while drilling device, which comprises an upper short section, a motor, the near-bit measurement while drilling lower short section and a bit, wherein the near-bit measurement while drilling lower short section and the bit are sequentially connected, the motor is used for driving the bit to drill, the near-bit measurement lower short section is used for measuring drilling data and transmitting the drilling data to the upper short section, and the upper short section is used for receiving the drilling data and transmitting the drilling data to terminal equipment.
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (17)
1. The utility model provides a nipple joint under measurement of near-bit while drilling, its characterized in that, nipple joint is installed between motor and drill bit under measurement of near-bit while drilling, nipple joint includes under measurement of near-bit while drilling:
the drilling system comprises a framework, a sensor assembly and a transmitting antenna, wherein the framework is provided with the sensor assembly and the transmitting antenna, the sensor assembly is connected with the transmitting antenna, the sensor assembly is used for measuring drilling data and transmitting the drilling data to the transmitting antenna, and the transmitting antenna is used for sending the drilling data out;
and the battery component is arranged in the framework, electrically connected with the sensor component and the transmitting antenna and used for supplying power to the sensor component and the transmitting antenna.
2. The lower short piece for measurement while drilling with a near drill bit of claim 1, wherein the framework is a unitary structure.
3. The lower sub for measurement while drilling with a near drill bit of claim 1, further comprising a holding cylinder disposed outside the framework for fixing the framework.
4. The near-bit measurement while drilling lower sub of claim 1, wherein the battery assembly is removably connected to the backbone.
5. The lower sub for near-bit measurement while drilling according to claim 1, wherein an adapter is connected to a front end of the battery assembly, a pressure-bearing contact pin is arranged on the adapter, and the pressure-bearing contact pin is electrically connected with the sensor assembly on the framework.
6. The lower sub of claim 5, wherein the sub comprises a front adapter and a rear adapter, the front adapter and the rear adapter being threadably connected.
7. The lower short piece for measurement while drilling with a near drill bit as claimed in claim 6, wherein a support ring is arranged on the outer side of the front connector, and the support ring is axially clamped with the inner wall of the framework.
8. The near-bit measurement while drilling lower sub of claim 7, wherein the support ring is keyed to the backbone to limit relative rotation of the support ring and the backbone.
9. The lower sub for measurement while drilling with the near drill bit as claimed in claim 1, wherein a fixing frame is sleeved on the outer side of the rear end of the battery assembly, and the fixing frame is in threaded connection with the inner wall of the framework.
10. The near-bit measurement while drilling lower sub of claim 1, wherein the transmitting antenna is a dipole antenna and employs manchester encoding.
11. The lower near-bit measurement while drilling sub of any one of claims 1 to 10, wherein an axial centerline of the battery assembly is collinear with an axial centerline of the backbone.
12. The lower sub for measurement while drilling according to any one of claims 1 to 10, wherein a mounting groove is formed on the framework, the mounting groove is formed around the periphery of the framework, and the sensor assembly is arranged in the mounting groove.
13. The near-bit measurement while drilling lower sub of claim 12, wherein the sensor assembly comprises a measurement sensor for measuring drilling data, a control circuit board for controlling the measurement sensor, and a wireless transmission control board for transmitting the drilling data measured by the measurement sensor to the transmitting antenna.
14. The near-bit measurement while drilling lower sub of claim 13, wherein the sensor assembly comprises a gamma probe for measuring natural gamma of the formation and/or a well deviation orientation sensor for measuring well deviation orientation, and the control circuit board comprises a gamma probe control circuit board for controlling the gamma probe and/or a well deviation orientation sensor control circuit board for controlling the well deviation orientation sensor.
15. The near-bit measurement while drilling lower sub of any one of claims 1 to 10, wherein the transmitting antenna transmits the drilling data in the form of wireless signals.
16. The lower sub for measurement while drilling with a near drill bit as claimed in any one of claims 1 to 10, wherein the holding cylinder is in threaded connection with the framework, and a sealing ring is arranged between the holding cylinder and the framework.
17. A near-bit measurement while drilling device, comprising an upper sub, a motor, a near-bit measurement while drilling lower sub according to any one of claims 1 to 16, and a bit, which are connected in sequence, wherein the motor is used for driving the bit to drill, the near-bit measurement lower sub is used for measuring drilling data and transmitting the drilling data to the upper sub, and the upper sub is used for receiving the drilling data and transmitting the drilling data to a terminal device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010531842.5A CN111852444A (en) | 2020-06-11 | 2020-06-11 | Lower short section for measurement while drilling near drill bit and measurement while drilling near drill bit measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010531842.5A CN111852444A (en) | 2020-06-11 | 2020-06-11 | Lower short section for measurement while drilling near drill bit and measurement while drilling near drill bit measuring device |
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| Publication Number | Publication Date |
|---|---|
| CN111852444A true CN111852444A (en) | 2020-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010531842.5A Pending CN111852444A (en) | 2020-06-11 | 2020-06-11 | Lower short section for measurement while drilling near drill bit and measurement while drilling near drill bit measuring device |
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| Country | Link |
|---|---|
| CN (1) | CN111852444A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113530530A (en) * | 2021-07-14 | 2021-10-22 | 中国海洋石油集团有限公司 | Logging-while-drilling instrument |
| CN115250282A (en) * | 2022-03-16 | 2022-10-28 | 中国石油天然气集团有限公司 | Transmission method, device, equipment and medium for near-bit acquired data |
| WO2023065739A1 (en) * | 2021-10-22 | 2023-04-27 | 中国石油大学(华东) | Near-bit multi-parameter downhole measurement while drilling and control system |
| WO2024017312A1 (en) * | 2022-07-19 | 2024-01-25 | 万晓跃 | Sidetracking tool |
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| WO2024017312A1 (en) * | 2022-07-19 | 2024-01-25 | 万晓跃 | Sidetracking tool |
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