CN112096289A - Near-bit geological guiding drilling system - Google Patents
Near-bit geological guiding drilling system Download PDFInfo
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- CN112096289A CN112096289A CN202010960695.3A CN202010960695A CN112096289A CN 112096289 A CN112096289 A CN 112096289A CN 202010960695 A CN202010960695 A CN 202010960695A CN 112096289 A CN112096289 A CN 112096289A
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- 238000005553 drilling Methods 0.000 title claims abstract description 55
- 230000005540 biological transmission Effects 0.000 claims abstract description 20
- 230000010365 information processing Effects 0.000 claims abstract description 11
- 238000005259 measurement Methods 0.000 claims description 57
- 210000002445 nipple Anatomy 0.000 claims description 17
- 239000000523 sample Substances 0.000 claims description 17
- 238000012545 processing Methods 0.000 claims description 16
- 238000007789 sealing Methods 0.000 claims description 16
- 230000001133 acceleration Effects 0.000 claims description 11
- 238000004891 communication Methods 0.000 claims description 7
- 230000006698 induction Effects 0.000 claims description 5
- 238000009530 blood pressure measurement Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 8
- 230000008054 signal transmission Effects 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000005755 formation reaction Methods 0.000 description 3
- 230000004308 accommodation Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 239000003209 petroleum derivative Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005251 gamma ray Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
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- 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
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- 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
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- 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
- E21B47/022—Determining slope or direction of the borehole, e.g. using geomagnetism
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- 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
- E21B7/06—Deflecting the direction of boreholes
- E21B7/064—Deflecting the direction of boreholes specially adapted drill bits therefor
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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)
- Geophysics And Detection Of Objects (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a near-bit geological guiding drilling system, which comprises a screw drilling tool connected with a drill bit, a near-bit measuring short section integrated with the screw drilling tool into a whole, an underground receiving short section, an MWD underground short section and a ground information processing system, wherein the near-bit measuring short section acquires near-bit geological parameter information and track parameter information and transmits the information to the underground receiving short section in a wired transmission mode; the underground receiving short section transmits the received information to the MWD underground short section, the MWD underground short section carries out classification coding on the information to generate regular mud pressure change signals, and the ground information processing system collects the mud pressure change signals and processes the mud pressure change signals to display corresponding information. The invention integrates the near-bit measuring short section and the screw drilling tool into a whole, so that the screw drilling tool can normally drill, and meanwhile, the stability of information transmission is improved by adopting a wired signal transmission mode.
Description
Technical Field
The invention relates to the technical field of petroleum and natural gas exploration, in particular to a near-bit geosteering drilling system.
Background
The petroleum logging is an indispensable technical service component of drilling engineering in the petroleum and natural gas exploration and development process, and logging tools used for measurement conventionally belong to measurement after drilling and cannot effectively analyze and control well tracks in real time. Along with the mining requirement, engineering technicians are required to know the borehole track and the stratum information change more timely and adjust the posture timely, and the method is significant particularly for identifying thin oil layers and improving the drilling efficiency. With the continuous development of downhole measurement technology, Measurement While Drilling (MWD) and Logging While Drilling (LWD) can meet the above requirements, and Measurement While Drilling (MWD) can continuously and directionally drill, measure some information of a near drill bit, and transmit the information to the surface instantly; logging While Drilling (LWD) can monitor directional Drilling, and can also perform comprehensive Logging to obtain directional data (inclination angle, azimuth angle, tool face angle), formation characteristics (gamma ray, resistivity Logging), Drilling parameters, and the like.
In the existing measurement while drilling system and logging while drilling system, the acquired information is sent to the underground signal receiving system in a wireless transmission mode, however, in some formations, the formations may play some shielding roles on wireless signals, so that the wireless signal transmission is unstable. In addition, in the current measurement while drilling system and the current logging while drilling system, the near-bit measuring short section and the screw drilling tool adopt split type design to adapt to different screw drilling tools, however, when the split type design is adopted, the near-bit measuring short section of the screw drilling tool has the risk of separation in the drilling process, and the drilling of the drill bit is influenced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a near-bit geological guiding drilling system which is stable in signal transmission and can normally drill by a screw drill.
In order to achieve the purpose, the invention provides the following technical scheme: a near-bit geosteering drilling system, the system comprising
The screw drill is connected with the drill bit;
the near-bit measuring short section is integrated with the screw drilling tool and is used for acquiring near-bit geological parameter information and track parameter information and transmitting the information to the underground receiving short section;
a downhole receiving sub connected with the screw drill and the near bit measuring sub through a data transmission signal line for transmitting the received information to the MWD downhole sub,
the MWD downhole short section is connected with the downhole receiving short section and used for classifying and coding information and generating regular mud pressure change signals;
and the ground information processing system is connected with the MWD downhole short section and is used for acquiring the mud pressure change signal and processing the mud pressure change signal so as to display corresponding information.
Preferably, the near-bit measuring sub comprises a measuring sub drill collar body and a first sealing cover plate arranged on the measuring sub drill collar body, a first accommodating space is formed between the first sealing cover plate and the measuring sub drill collar body, and a first accommodating space is arranged in the first accommodating space
A signal processing circuit module;
the communication interface module is connected with the signal processing circuit module and is connected with the underground receiving short section through a data transmission signal line;
and the first measuring module is connected with the signal processing circuit module and is used for acquiring near-bit geological parameter information and track parameter information.
Preferably, the first measurement module comprises one or more of an azimuth gamma measurement module, a well deviation measurement module, and a resistivity measurement module.
Preferably, the downhole receiving sub comprises a receiving sub drill collar body and a second sealing cover plate arranged on the measuring sub drill collar body, a second accommodating space is formed between the second sealing cover plate and the measuring sub drill collar body, and a second accommodating space is arranged in the second accommodating space
A control unit module;
the second measurement module is connected with the control unit module and used for acquiring near-bit geological parameter information;
and the FSK induction module is connected with the control unit module and the MWD downhole short section and is used for sending the near-bit geological parameter information to the MWD downhole short section.
Preferably, the second measurement module comprises an annulus pressure measurement module for measuring annulus pressure.
Preferably, the MWD downhole sub comprises
The directional measurement probe pipe nipple is used for measuring directional parameter information;
the pulse signal generator is used for generating a mud pressure change signal;
and the probe control center is connected with the directional measurement probe pipe nipple and the pulse signal generator and is used for receiving and analyzing parameter information transferred by the underground receiving nipple, classifying and coding effective data and the parameter information measured by the directional measurement probe pipe nipple to form a complete sequence, controlling the pulse signal generator to generate regular mud pressure signals and sending the mud pressure signals to the ground information processing system.
Preferably, the distance between the near bit measuring sub and the drill bit is less than or equal to 2 m.
Preferably, the distance between the near bit measuring sub and the drill bit is 1.5 m.
Preferably, the well deviation measuring module comprises a first accelerometer for measuring acceleration of the object in a first direction, a second accelerometer for measuring acceleration of the object in a second direction and a third accelerometer for measuring acceleration of the object in a third direction, wherein the first direction, the second direction and the third direction are mutually perpendicular two by two.
Preferably, one end of the downhole receiving sub is in threaded connection with the auger assembly, and the opposite end is in threaded connection with the MWD downhole sub.
The invention has the beneficial effects that:
(1) according to the near-bit geological guiding drilling system, on one hand, the near-bit measuring short section and the screw drilling tool are integrated, so that the risk of separation of the near-bit measuring short section is avoided, the overall stability of the screw drilling tool is improved, the screw drilling tool can normally drill, on the other hand, wireless signal transmission is replaced by a data transmission signal wire, the stability of information transmission is improved, and the application range of the near-bit geological guiding drilling system is wider.
(2) The near-bit geological guiding drilling system can collect near-bit geological parameters in the rotary drilling process, the data measuring point is close to the bit, and the azimuth gamma measuring function can be realized in the rotary process.
Drawings
FIG. 1 is a block diagram of the system architecture of the present invention;
FIG. 2 is a schematic structural diagram of the near bit gauging nipple of FIG. 1;
FIG. 3 is a schematic diagram of the downhole receiving sub of FIG. 1;
FIG. 4 is a schematic diagram of the MWD downhole sub of FIG. 1.
Reference numerals: 10. the device comprises a screw drilling tool, 20, a near-bit measuring pup joint, 21, a measuring pup joint drill collar body, 22, a first sealing cover plate, 23, a signal processing circuit module, 24, a communication interface module, 25, an azimuth gamma detection module, 26, a well deviation measuring module, 27, a resistivity measuring module and an antenna, 30, a downhole receiving pup joint, 31, a receiving pup joint drill collar body, 32, a second sealing cover plate, 33, a control unit module, 34, an FSK induction module, 35, a power supply module, 36, an annular pressure measuring module, 40, an MWD downhole pup joint, 41, a directional measuring probe pup joint, 42, a pulse signal generator, 50, a ground information processing system, 60, a drill bit, 70 and a data transmission signal line.
Detailed Description
The technical solution of the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention.
According to the near-bit geological guiding drilling system disclosed by the invention, the near-bit measuring nipple 20 and the screw drilling tool 10 are integrated into a whole, so that the screw drilling tool 10 can normally drill, meanwhile, the information measured by the near-bit measuring nipple 20 is transmitted to the ground information processing system 50 in a wired signal transmission mode, and the stability of information transmission is improved.
As shown in fig. 1, the near-bit geosteering drilling system disclosed by the present invention comprises a helical drilling tool 10, a near-bit measurement sub 20, a downhole receiving sub 30, an MWD downhole sub 40, and a surface information processing system 50, wherein the helical drilling tool 10 is connected to a drill bit 60, and is used for driving the drill bit 60 to work, and comprises a motor assembly and a transmission assembly; the near-bit measuring nipple 20 and the screw drilling tool 10 are integrated into a whole and used for acquiring near-bit geological parameter information and track parameter information and transmitting the information to the underground receiving nipple 30, for example, the near-bit measuring nipple 20 transmits acquired stratum information, well track and the like to the underground receiving nipple 30; the downhole receiving sub 30 is connected with the screw drill 10 in a threaded manner, and the downhole receiving sub 30 is connected with the near-bit measuring sub 20 through a data transmission signal line 70 and used for transmitting the received information to the MWD downhole sub 40; the MWD downhole short section 40 is connected with the downhole receiving short section 30 in a threaded mode and used for classifying and coding information and generating regular mud pressure change signals; the surface information processing system 50 is connected with the MWD downhole sub 40, and is configured to acquire a mud pressure variation signal, demodulate, filter, and decode the mud pressure variation signal, and display corresponding information.
In this embodiment, the distance between the short section 20 and the drill bit 60 is measured to the near drill bit integrated in the helical-lobe drilling tool 10 is less than 2 meters, and during the implementation, the distance between the short section 20 and the drill bit 60 is measured to the near drill bit is 1.5 meters as the best, and of course, in other embodiments, the distance between the short section 20 and the drill bit 60 can be measured to the near drill bit according to actual requirements.
As shown in fig. 2, the near-bit measurement sub 20 includes a measurement sub drill collar body 21 and a first sealing cover plate 22, a slurry channel a is provided on the measurement sub drill collar body 21, the first sealing cover plate 22 is installed on the measurement sub drill collar body 21, and a first accommodation space is formed between the first sealing cover plate and the measurement sub drill collar body 21, and the first accommodation space is used for installing each functional module, so that each functional module is isolated from outside slurry. Be equipped with signal processing circuit module 23 in the first accommodating space, communication interface module 24 and first measuring module, wherein, communication interface module 24 links to each other with receiving nipple joint 30 in the pit through data transmission signal line, communication interface module 24 still links to each other with signal processing circuit module 23 simultaneously, first measuring module links to each other with signal processing circuit module 23, during the implementation, various parameter information that first measuring module will gather sends to signal processing circuit module 23 in, upload information to receiving nipple joint 30 in the pit through communication interface module 24 in real time after signal processing circuit module 23 handles. Compared with the prior art, the data transmission signal line is used for replacing wireless signal transmission, so that the stability of information transmission can be improved, and the application range of the near-bit 60 geosteering drilling system is wider.
Further, the first measurement module includes, but is not limited to, an azimuth gamma detection module 25, a well deviation measurement module 26, a resistivity measurement module, and an antenna 27, and in other embodiments, the corresponding measurement module may be set according to actual requirements. The inclination measuring module 26 is used for measuring a component of actual gravity in an axial direction of the object to calculate inclination, and includes a first accelerometer, a second accelerometer and a third accelerometer, where the first accelerometer is used for measuring a gravitational acceleration Gx of the object in a first direction, the second accelerometer is used for measuring a gravitational acceleration Gy of the object in a second direction, the third accelerometer is used for measuring a gravitational acceleration Gz of the object in a third direction, and every two of the first direction, the second direction and the third direction are perpendicular to each other. After acquiring the gravitational acceleration of the object in the above three directions, the total gravitational acceleration Gt, the inclination angle α, and the high-side toolface angle β can be calculated by the following formulas:
in this embodiment, after the short section 20 is measured to near-bit through each measurement module gathers corresponding data, convert and analyze to store the effective data, further extract the required data in ground, by signal processing circuit module 23 control, through data transmission signal line with data transmission to receiving short section 30 in the pit.
As shown in fig. 3, the downhole pup joint receiving 30 includes a pup joint receiving drill collar body 31 and a second sealing cover plate 32, a slurry channel a is also formed on the pup joint receiving drill collar body 31, the second sealing cover plate 32 is mounted on the pup joint receiving drill collar body 31, and a second receiving space is formed between the second sealing cover plate and the pup joint receiving drill collar body 31, and the second receiving space is used for mounting each functional module, so that each functional module is isolated from outside slurry. A control unit module 33, an FSK induction module 34, a power module 35 and a second measurement module are arranged in the second accommodating space, wherein the second measurement module is connected with the control unit module 33, the power module 35 is connected with the near-bit measurement short section 20 and the control unit module 33, in implementation, the power module 35 outputs a direct current power supply to provide power support for each module in the near-bit measurement short section 20, such as the signal processing circuit module 23, the azimuth gamma detection module 25, the well inclination measurement module 26 and the like, meanwhile, the second measurement module converts and analyzes the collected corresponding data, stores effective data, further extracts data required by the ground and transmits the data to the control unit module 33, and the control unit module 33 further transmits the data to the MWD downhole 40 through the FSK induction module 34.
In this embodiment, the control unit module 33 controls data exchange between the modules and function realization of the modules through the CAN bus.
Further, the second measurement module includes, but is not limited to, the annular pressure measurement module 36, and may be selected according to actual requirements when implemented.
As shown in fig. 4, the MWD downhole sub 40 includes an directional measurement probe sub 41, a pulse signal generator 42, and a probe control center, where the directional measurement probe sub 41 is connected to the probe control center, and is configured to measure directional parameter information, such as a well inclination angle, an azimuth angle, or a tool face angle, and send the parameter information to the probe control center; the pulse signal generator 42 is connected to the probe control center for generating a mud pressure change signal. In implementation, on the basis of completing conventional directional measurement through the directional measurement probe sub 41, that is, on the basis of completing measurement of directional data, the MWD downhole sub 40 receives near-bit measurement parameter information forwarded by the downhole receiving sub 30 through the probe control center, further analyzes the near-bit measurement parameter information, classifies and codes valid data and self-measured data to form a complete sequence, and controls the pulse signal generator 42 to enable the pulse signal generator 42 to generate regular mud pressure signals, and the mud pressure signals are further transmitted to the ground information processing system 50. In this embodiment, the pulse signal generator 42 may be configured with different specifications according to actual requirements.
According to the near-bit 60 geosteering drilling system, on one hand, the near-bit measuring nipple 20 and the screw drilling tool 10 are integrated into a whole, so that the overall stability of the screw drilling tool 10 is improved, the screw drilling tool 10 can normally drill, on the other hand, the data transmission signal line replaces wireless signal transmission, so that the stability of information transmission is improved, and the application range of the near-bit geosteering drilling system is wider.
In addition, the near-bit geological guiding drilling system can acquire near-bit geological parameters in the rotary drilling process, the data measurement point is close to the bit, and the azimuth gamma measurement function can be realized in the rotary process.
Therefore, the scope of the present invention should not be limited to the disclosure of the embodiments, but includes various alternatives and modifications without departing from the scope of the present invention, which is defined by the claims of the present patent application.
Claims (10)
1. A near-bit geosteering drilling system, comprising
The screw drill is connected with the drill bit;
the near-bit measuring short section is integrated with the screw drilling tool and is used for acquiring near-bit geological parameter information and track parameter information and transmitting the information to the underground receiving short section;
a downhole receiving sub connected with the screw drill and the near bit measuring sub through a data transmission signal line for transmitting the received information to the MWD downhole sub,
the MWD downhole short section is connected with the downhole receiving short section and used for classifying and coding information and generating regular mud pressure change signals;
and the ground information processing system is connected with the MWD downhole short section and is used for acquiring the mud pressure change signal and processing the mud pressure change signal so as to display corresponding information.
2. The system of claim 1, wherein the near-bit measurement sub comprises a measurement sub drill collar body and a first sealing cover plate arranged on the measurement sub drill collar body, a first accommodating space is formed between the first sealing cover plate and the measurement sub drill collar body, and a first accommodating space is arranged in the first accommodating space
A signal processing circuit module;
the communication interface module is connected with the signal processing circuit module and is connected with the underground receiving short section through a data transmission signal line;
and the first measuring module is connected with the signal processing circuit module and is used for acquiring near-bit geological parameter information and track parameter information.
3. The system of claim 2, wherein the first measurement module comprises one or more of an azimuth gamma measurement module, a well deviation measurement module, and a resistivity measurement module.
4. The system of claim 1, wherein the downhole sub comprises a sub body and a second sealing cover plate disposed on the sub body, a second receiving space is formed between the second sealing cover plate and the sub body, and a second receiving space is disposed in the second receiving space
A control unit module;
the second measurement module is connected with the control unit module and used for acquiring near-bit geological parameter information;
and the FSK induction module is connected with the control unit module and the MWD downhole short section and is used for sending the near-bit geological parameter information to the MWD downhole short section.
5. The system of claim 4, wherein the second measurement module comprises an annulus pressure measurement module to measure annulus pressure.
6. The system of claim 1, wherein the MWD downhole sub comprises a directional measurement probe sub for measuring directional parameter information;
the pulse signal generator is used for generating a mud pressure change signal;
and the probe control center is connected with the directional measurement probe pipe nipple and the pulse signal generator and is used for receiving and analyzing parameter information transferred by the underground receiving nipple, classifying and coding effective data and the parameter information measured by the directional measurement probe pipe nipple to form a complete sequence, controlling the pulse signal generator to generate regular mud pressure signals and sending the mud pressure signals to the ground information processing system.
7. The system of claim 1, wherein a distance between the near bit gauging sub and the drill bit is less than or equal to 2 m.
8. The system of claim 7, wherein the distance between the near bit gauging sub and the drill bit is 1.5 m.
9. The system of claim 3, wherein the well deviation measurement module comprises a first accelerometer for measuring acceleration of the object in a first direction, a second accelerometer for measuring acceleration of the object in a second direction, and a third accelerometer for measuring acceleration of the object in a third direction, wherein the first direction, the second direction, and the third direction are mutually perpendicular two by two.
10. The system of claim 1, wherein the downhole receiving sub is threaded at one end to the auger assembly and at an opposite end to the MWD downhole sub.
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| CN202010960695.3A CN112096289A (en) | 2020-09-14 | 2020-09-14 | Near-bit geological guiding drilling system |
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| CN202010960695.3A CN112096289A (en) | 2020-09-14 | 2020-09-14 | Near-bit geological guiding drilling system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113719237A (en) * | 2021-08-23 | 2021-11-30 | 中煤科工集团西安研究院有限公司 | Broken soft thin coal seam gas extraction directional long drilling construction drilling tool combination and method |
| CN114017015A (en) * | 2021-10-29 | 2022-02-08 | 中国石油天然气集团有限公司 | Adaptation mechanism suitable for mud pulse generator |
| CN116950566A (en) * | 2023-09-19 | 2023-10-27 | 上海达坦能源科技股份有限公司 | Self-generating near-bit geosteering tool |
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