CN112227995A - Electric control system for well wall coring - Google Patents
Electric control system for well wall coring Download PDFInfo
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- CN112227995A CN112227995A CN202011091849.6A CN202011091849A CN112227995A CN 112227995 A CN112227995 A CN 112227995A CN 202011091849 A CN202011091849 A CN 202011091849A CN 112227995 A CN112227995 A CN 112227995A
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- 238000004891 communication Methods 0.000 claims abstract description 36
- 230000006870 function Effects 0.000 claims abstract description 17
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- 239000011435 rock Substances 0.000 claims description 14
- 238000009530 blood pressure measurement Methods 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 4
- 238000005553 drilling Methods 0.000 description 20
- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
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- 230000009286 beneficial effect Effects 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
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
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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
- E21B44/00—Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
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Abstract
The embodiment of the invention discloses a side-wall coring electric control system, which comprises: a ground electric control system and a downhole instrument electric control system; a ground electrical control system comprising: ground power supply and corollary equipment part, wherein, ground power supply and corollary equipment part include: the cable comprises an alternating current power supply, a direct current power supply, a cable core distribution panel, a faucet and a cable; a downhole instrument electrical control system, comprising: the motor control device comprises a first motor control drive circuit and a second motor control drive circuit; the cable core distribution panel is arranged for distributing functions of cable cores of the cable; the first motor control drive circuit is arranged to control and drive the first motor; the second motor control drive circuit is arranged to control and drive the second motor; wherein the first motor and the second motor have different powers. Through the scheme of the embodiment, on the basis of unchanged quantity of the current cable cores, the requirements of one-way alternating current, two-way high-voltage direct current power supply and data communication of the underground instrument and intelligent coring are met simultaneously.
Description
Technical Field
The embodiment of the application relates to but is not limited to the drilling technology, in particular to a side-wall coring electronic control system.
Background
In the side-wall coring system, an alternating current or direct current motor is applied to a conventional side-wall coring instrument underground, so that the defects that the coring speed cannot be adjusted and controlled, the drill is blocked easily, the coring is incomplete or the coring fails and the like exist, and the drilling of large-particle rock cores cannot be completed stably and reliably. In a large-particle borehole wall coring logging instrument, because a coring motor adopts a high-power direct-current brushless motor to complete the drilling of a rock core, and simultaneously, the functions of pushing and drilling are completed by using a 500W hydraulic power motor, in addition, alternating current is required to be supplied to the downhole instrument, and the uplink and downlink communication functions are completed, the logging is currently performed by adopting a long cable which is a 7-core cable, each cable core is an AWG20 number wire, and the limitation of the number and the wire number of the cable cores of the cable cannot be completed by the original method in power supply; meanwhile, the data acquisition and control functions completed by an electric control system of the underground instrument are more complex than those of the conventional well wall coring instrument. Aiming at the problems that in some technologies, a motor is used for coring and hydraulic power of a side-wall coring instrument, the drilling speed and the rotating speed of a drill bit cannot be independently adjusted, intelligent coring cannot be realized, coring operation is judged by the familiarity and experience of an operator on the instrument, the drilling rate is high, the core obtaining rate is low, the time of occupying a wellhead is long, and the operation cost is high.
Disclosure of Invention
The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.
The utility model provides a side-wall coring electrical system can satisfy the supply of exchanging in the pit and high voltage direct current simultaneously on the basis of current cable core quantity to and the intelligent coring power supply system that ground system and electrical system combined together in the pit.
The utility model provides a side-wall coring electrical system, a side-wall coring electrical system includes: a ground electric control system and a downhole instrument electric control system; the ground electric control system comprises: the ground power supply and corollary equipment part, wherein, ground power supply and corollary equipment part includes: the cable comprises an alternating current power supply, a direct current power supply, a cable core distribution panel, a faucet and a cable; the downhole instrument electrical control system comprising: the motor control device comprises a first motor control drive circuit and a second motor control drive circuit; wherein:
the output end of the horse faucet is connected with the first motor control driving circuit and the second motor control driving circuit, and the input end of the horse faucet is respectively connected with the alternating current power supply and the direct current power supply through a cable core distribution panel;
the cable core distribution panel is arranged for distributing functions of the cable cores of the cable;
the first motor control drive circuit is arranged to control and drive the first motor;
the second motor control drive circuit is arranged to control and drive the second motor;
wherein the first motor and the second motor have different powers.
In an exemplary embodiment, the output terminal of the ac power source includes: a first transformer having a secondary winding with a first center tap; two ends of a secondary winding of the first transformer are used as output ends of the alternating current power supply and are respectively connected with a first cable core and a second cable core of the cable through the faucet;
the positive output end of the first direct current power supply is connected with the first center tap;
the positive output end of the second direct current power supply is connected with the fifth cable core, the sixth cable core and the seventh cable core of the cable through the faucet; and the negative output ends of the first direct current power supply and the second direct current power supply are connected with the sheath of the cable.
In an exemplary embodiment, the ground electrical control system further includes: the device comprises a control module and a data acquisition module; wherein:
the data acquisition module is used for converting the downhole data transmitted by the third cable core and the fourth cable core into data in a level format and inputting the data in the level format into the control module;
the control module is used for processing the received level format data to obtain a corresponding execution command, and sending the execution command to the data acquisition module to be transmitted to the downhole instrument for data acquisition.
In an exemplary embodiment, the downhole tool electrical control system further comprises: the underground weak current power supply circuit module;
the weak current power supply circuit module in pit includes: an AC power supply section configured to supply AC power to the downhole; the alternating current power supply section includes: at least one second transformer;
two ends of the primary winding of the second transformer are connected with the first cable core and the second cable core;
the secondary winding of the second transformer is used as an alternating current input end of an underground alternating current electric instrument;
the primary winding of the second transformer has a second center tap;
one or more secondary windings of each second transformer;
when the secondary windings of the second transformer are multiple, different secondary windings of the second transformer output alternating currents with different voltages.
In an exemplary embodiment, the downhole tool power supply further comprises: the direct current power supply part is used for providing direct current power supply for the underground;
the direct current supply section includes: the first direct current positive electrode lead, the first direct current negative electrode lead, the second direct current positive electrode lead and the second direct current negative electrode lead;
the first end of the first direct current positive wire is connected with the second center tap, and the second end of the first direct current positive wire is connected with a control driving circuit of the first underground motor;
the first end of the first direct current negative electrode lead is connected with the sheath of the cable, and the second end of the first direct current negative electrode lead is connected with a control driving circuit of the first underground motor;
the first end of the second direct-current positive electrode lead is connected with the bridle head, and the second end of the second direct-current positive electrode lead is connected with a control driving circuit of the underground second motor;
and the first end of the second direct-current negative electrode lead is connected with the sheath of the cable, and the second end of the second direct-current negative electrode lead is connected with a control driving circuit of the underground second motor.
In an exemplary embodiment, the downhole tool electrical control system further comprises: the underground communication system comprises a main control circuit module and an underground communication module;
the underground communication module is connected with the underground weak current power supply circuit module and the main control circuit module, and is used for converting a man code instruction transmitted from the ground into a TTL level instruction and transmitting the TTL level instruction to the main control circuit module; meanwhile, the data frame in the TTL level format transmitted by the main control circuit module is converted into a data frame in a Manchester code format and is transmitted to the ground electric control system by utilizing a third cable core and a fourth cable core in the cable;
and the main control circuit module is connected with the underground communication module and used for receiving the command instruction sent by the underground communication module and transmitting the command instruction to each node circuit module of the underground instrument through an RS485 bus.
In an exemplary embodiment, the downhole tool electrical control system further comprises: the device comprises a natural gamma circuit module, an underground pressure measuring circuit module and a rock core length measuring circuit module;
the natural gamma circuit module is connected with the underground weak current power supply circuit module and the main control circuit module and is used for measuring depth position information of a stratum and transmitting the measured depth position information to the main control circuit module;
the underground pressure measurement circuit module is connected with the underground weak current power supply circuit module and the main control circuit module, and is used for acquiring signals of a pushing pressure sensor and a coring pressure sensor and transmitting the acquired signals to the main control circuit module;
the core length measuring circuit module is connected with the underground weak current power supply circuit module and the main control circuit module and is used for monitoring and determining well depth position data corresponding to the side-wall coring;
the main control circuit module is respectively connected with the natural gamma circuit module, the underground pressure measuring circuit module and the rock core length measuring circuit module, and is used for receiving data collected by the connected circuit modules, combining the data into a data frame and sending the data frame to the underground communication module as underground data.
In an exemplary embodiment, the dc voltage includes one or more of: +5V, + 12V, +18V and + -24V.
In an exemplary embodiment, the cable core distribution panel functionally distributing the cores of the cable includes: when the direct current power supply comprises a first direct current power supply and a second direct current power supply, the cable core distribution panel distributes the first cable core and the second cable core of the cable to transmit alternating current, and the first direct current power supply multiplexes the first cable core and the second cable core occupied by the alternating current power supply to transmit direct current of the first direct current power supply and supply direct current to the first motor; and the fifth cable core, the sixth cable core and the seventh cable core of the cable transmit direct current of a second direct current power supply and supply direct current to the second motor.
In an exemplary embodiment, the multiplexing is of ac and dc power co-transmitted with a cable core.
The embodiment of the disclosure discloses a side wall coring electrical system, includes: a ground electric control system and a downhole instrument electric control system; a ground electrical control system comprising: ground power supply and corollary equipment part, wherein, ground power supply and corollary equipment part include: the cable comprises an alternating current power supply, a direct current power supply, a cable core distribution panel, a faucet and a cable; a downhole instrument electrical control system, comprising: the motor control device comprises a first motor control drive circuit and a second motor control drive circuit; the cable core distribution panel is arranged for distributing functions of cable cores of the cable; the first motor control drive circuit is arranged to control and drive the first motor; the second motor control drive circuit is arranged to control and drive the second motor; wherein the first motor and the second motor have different powers. Through the scheme disclosed by the invention, on the basis of the current cable core quantity, the requirements of one-way alternating current and two-way high-voltage direct current power supply and data communication of the underground instrument and an intelligent coring power supply system are met simultaneously.
Other aspects will be apparent upon reading and understanding the attached drawings and detailed description.
Drawings
FIG. 1 is a schematic structural view of an electric side-wall coring system according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a ground electrical control system in some exemplary embodiments;
FIG. 3 is a schematic diagram of an electrical control system for a downhole tool in some example embodiments.
Detailed Description
Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings. It should be noted that the features of the embodiments and examples of the present application may be arbitrarily combined with each other without conflict.
The steps illustrated in the flow charts of the figures may be performed in a computer system such as a set of computer-executable instructions. Also, while a logical order is shown in the flow diagrams, in some cases, the steps shown or described may be performed in an order different than here.
FIG. 1 is a schematic view of an electrical control system for side-wall coring according to an embodiment of the present application, including: a ground electric control system 1 and a downhole instrument electric control system 2; the ground electric control system 1 includes: a ground power supply and ancillary equipment portion 11, wherein the ground power supply and ancillary equipment portion comprises: an alternating current power supply 111, a direct current power supply 112, a cable core distribution panel 113, a bridle 114 and a cable 115; the downhole tool electrical control system 2 comprises: a first motor control drive circuit 21 and a second motor control drive circuit 22; wherein:
the output end of the horse faucet 114 is connected with the first motor control driving circuit 21 and the second motor control driving circuit 22, and the input end is respectively connected with the alternating current power supply 111 and the direct current power supply 112 through a cable core distribution panel 113;
the cable core distribution panel 113 is configured to perform function distribution on cable cores of the cable;
the first motor control drive circuit 21 is arranged to control and drive the first motor;
the second motor control drive circuit 22 is arranged to control and drive the second motor;
wherein the first motor and the second motor have different powers.
In some exemplary embodiments, the output terminal of the ac power source 111 includes: a first transformer having a secondary winding with a first center tap; two ends of the secondary winding of the first transformer are used as output ends of the alternating current power supply 111 and are respectively connected with a first cable core and a second cable core of the cable 115 through the faucet 114;
the positive output end of the first direct current power supply 1121 is connected to the first center tap;
the positive output end of the second dc power supply 1122 is connected to the fifth, sixth and seventh conductors of the cable 115 via the faucet 114; the negative output terminals of the first dc power supplier 1121 and the second dc power supplier 1122 are connected to the sheath of the cable 115.
In some exemplary embodiments, the ground electrical control system 1 further includes: a control module 12 and a data acquisition module 13; wherein: the data acquisition module 13 is configured to convert downhole data transmitted by the third cable core and the fourth cable core into data in a TTL level format, and input the TTL level format data to the control module 12; the control module 12 is configured to process the received TTL level format data to obtain a corresponding execution command, and send the execution command to the data acquisition module to be transmitted to a downhole instrument for data acquisition. Wherein the cable 115 is a 7-core cable; the cable core wire in the 7-core cable meets the American wire gauge AWG 20. In this embodiment, as shown in the schematic structural diagram of the ground electrical control system shown in fig. 2, the data acquisition module 13 includes a communication circuit and a data acquisition processing circuit. The communication circuit is responsible for decoding data in an FSK coding format which is transmitted underground through two cable cores in the 7-core cable as communication lines into a TTL level format, inputting the data into the control module 12 for collection, and finally processing the data by system software. The system software extracts and analyzes the acquired data, displays the acquired data visually, can input the action to be operated and related parameters, sends the action to be operated and the related parameters to the data acquisition module 13, and transmits the coded data to the underground instrument in an FSK communication mode to execute commands.
In some exemplary embodiments, said cable core distribution panel 113 performing functional distribution on the cable cores of the cable includes: when the direct current power supply comprises a first direct current power supply and a second direct current power supply, the first cable core and the second cable core of the cable are distributed by the cable core distribution panel to transmit alternating current, and the first direct current power supply multiplexes the direct current of the first direct current power supply and transmits the direct current of the first direct current power supply to the first motor; and the fifth cable core, the sixth cable core and the seventh cable core of the cable transmit direct current of the second direct current power supply and supply direct current to the second motor. As shown in fig. 2, the ground power supply and supporting equipment part includes: an alternating current power supply 111, two direct current power supplies 1121 and 1122, a cable core distribution panel 113, a bridle 114 and a 7-core cable 115; the alternating current power supply provides power required by the downhole instrument, and may be an AC1500W alternating current power supply, the output voltage and current of the power supply are selected in two steps, and may be selected according to the downhole instrument, and the direct current power supply 1121 includes a center tap. The two paths of direct current power supplies can respectively adopt DC6000W and DC2000W, DC6000W is used for supplying power to a first direct current motor providing 3500W power, and DC2000 is used for supplying power to a second direct current motor providing 500W power. The DC2000 is used for providing a positive end of a power supply of a second direct current motor with 500W power, completing the configuration of cable cores through a cable core distribution panel by an alternating current center tap, and superposing the cable cores onto two cable cores occupied by alternating current; the positive end of the DC6000W is transmitted to the underground instrument through three cable cores of the cable, and the negative ends of the two DC power supplies are transmitted through the sheath of the cable. The bridle head completes the connection of the related electric instrument and the 7-core cable. Two cable cores in the 7-core cable complete power supply transmission of alternating current and one path of direct current power supply, the two cable cores are used as communication lines, the three cable cores are used as positive ends of the direct current power supply, and negative ends of the two paths of direct current power supply are supplied downwards through a sheath of the 7-core cable. In this embodiment, the first cable core, the second cable core … …, and the seventh cable core in the cable are for distinguishing different cable cores, and any one cable core may be used as the first cable core, and the other six cable cores are similar.
In some exemplary embodiments, the multiplexing is that of co-transmission of AC and DC with a cable core
In some exemplary embodiments, the power supply of the electric control system of the downhole instrument can be composed of a transformer or a transformer group and corresponding circuits of rectifying and filtering direct-current low-voltage power supply circuits, wherein the primary winding of the transformer is connected with 2 cores powered by 7-core cables AC, and 500VDC direct current is taken out from a central tap and is used for supplying power to a hydraulic power motor of the downhole instrument; the low-voltage alternating current after voltage transformation is obtained from the secondary coil, and then the multi-path low-voltage power supply required by the underground instrument is further obtained through different rectification voltage stabilizing circuits to be used by each functional circuit in the instrument.
In some exemplary embodiments, as shown in the schematic structural diagram of the electrical control system of the downhole tool in fig. 3, the electrical control system of the side-wall coring further includes a joint 3 for connecting the surface electrical control system 1 and the electrical control system 2 of the downhole tool, and the electrical control system 2 of the downhole tool further includes: a downhole weak current power supply circuit module 23; the downhole weak current power supply circuit module 23 comprises: an ac power supply section 231 configured to supply ac power to the downhole; the alternating current power supply section includes: at least one second transformer; two ends of the primary winding of the second transformer are connected with the first cable core and the second cable core; the secondary winding of the second transformer is used as an alternating current input end of an underground alternating current electric instrument; the primary winding of the second transformer has a second center tap; one or more secondary windings of each second transformer; when the secondary windings of the second transformer are multiple, different secondary windings of the second transformer output alternating currents with different voltages.
In some exemplary embodiments, the downhole instrument electronic control system 2 further comprises: a DC power supply 232 for providing DC power downhole; the direct current supply section includes: the first direct current positive electrode lead, the first direct current negative electrode lead, the second direct current positive electrode lead and the second direct current negative electrode lead; the first end of the first direct current positive wire is connected with the second center tap, and the second end of the first direct current positive wire is connected with a control driving circuit of the first underground motor; the first end of the first direct current negative electrode lead is connected with the sheath of the cable, and the second end of the first direct current negative electrode lead is connected with a control driving circuit of the first underground motor; the first end of the second direct-current positive electrode lead is connected with the bridle head, and the second end of the second direct-current positive electrode lead is connected with a control driving circuit of the underground second motor; and the first end of the second direct-current negative electrode lead is connected with the sheath of the cable, and the second end of the second direct-current negative electrode lead is connected with a control driving circuit of the underground second motor.
In some exemplary embodiments, the downhole instrument electronic control system 2 further comprises: a main control circuit module 24 and an underground communication module 25; the underground communication module 25 is connected with the underground weak current power supply circuit module 23 and is used for converting underground data into command instructions; the main control circuit module 24 is connected to the downhole communication module, and is configured to receive a command sent by the downhole communication module, and transmit the command to the ground electronic control system by using a third cable core and a fourth cable core in the cable. The underground communication module and the main control circuit module are connected with the underground communication module for supplying power and providing power supplies with different voltages.
In some exemplary embodiments, the downhole instrument electronic control system 2 further comprises: a natural gamma circuit module 26, a downhole pressure measuring circuit module 27 and a core length measuring circuit module 28; the natural gamma circuit module 26 is connected with the downhole weak current power supply circuit module 23 and the main control circuit module 24 and used for measuring depth position information of a stratum and transmitting the measured depth position information to the main control circuit module 24; the underground pressure measurement circuit module is connected with the underground weak current power supply circuit module 23 and the main control circuit module 24, and is used for acquiring signals of a pushing pressure sensor and a coring pressure sensor and transmitting the acquired signals to the main control circuit module 24; the core length measuring circuit module is connected with the underground weak current power supply circuit module 23 and the main control circuit module 24 and is used for monitoring and determining well depth position data corresponding to the side-wall coring; the main control circuit module 24 is connected to the natural gamma circuit module 26, the downhole pressure measurement circuit module 27, and the core length measurement circuit module 28, and configured to receive data collected by the connected modules, arrange and combine the data into one large frame of data, send the large frame of data as downhole data to the downhole communication module 25, and transmit the large frame of data to the surface electronic control system 1 through a cable. In this embodiment, the main control circuit module 24 arranges and combines the received data collected by the natural gamma circuit module 26, the downhole pressure measurement circuit module 27, the core length measurement circuit module 28, and the like into one large frame of data, and sends the large frame of data as downhole data to the downhole communication module and transmits the data to the surface electronic control system 1 through a cable. The main control circuit module 24 communicates with each function circuit in the well in an RS485 communication mode. In this embodiment, the natural gamma circuit module in the downhole instrument measures the property of the formation by using the gamma ray detector, and mainly completes depth correction of the well depth, so that the instrument can accurately obtain the depth position of the formation in the downhole, and guarantee is provided for the instrument to obtain the core of the specified formation. The underground communication module is the same as the communication module in the ground control system, and plays a role in converting data and command communication modes. The main control circuit communicates with each function circuit in the well in RS485 mode, and is used for receiving commands sent by the communication circuit to each function circuit of the well instrument, collecting the state and collected data of each function circuit, and combining the state and data into a large frame of data to be sent to the communication circuit and transmitted to the ground electric control system for processing through a cable. The underground pressure measuring circuit mainly collects signals of a pressure sensor by pushing pressure and coring pressure, monitors system pressure of a hydraulic system, and monitors and controls pushing setting of an instrument and drilling speed of a rock core. The core length measuring circuit is mainly used for measuring the unique sensor of the core barrel and is used for monitoring and determining the well depth position corresponding to the core, and the problem that the serial number and the well depth position of the drilled core are not correct is solved. The motor control drive circuits with different power of the two sets respectively complete the control and drive of the coring motor of the hydraulic power motor, and the pressure of the hydraulic pipeline and the drilling of the rock core are ensured. The multi-way valve control circuit completes the turn-off and turn-on of electromagnetic valves of different functional parts in the hydraulic pipeline, guarantees the system pressure required by each functional part, and guarantees the pushing and setting and the drilling and recovery of rock cores.
In some exemplary embodiments, the dc voltage comprises one or more of: +5V, + 12V, +18V and + -24V. Different dc voltages may provide power to different downhole tools.
The existing well wall coring instrument uses a motor for coring and hydraulic power, the drilling speed and the rotating speed of a drill bit can not be independently adjusted, intelligent coring can not be realized, coring operation is judged by the familiarity and experience of an operator on the instrument, the drilling rate is high, the core acquisition rate is low, the well head occupation time is long, and the operation cost is high. The ground system software can realize one-key intelligent automatic drilling of the rock core by analyzing the information of the pressure of the hydraulic system, the rotating speed of the drill bit, the drilling pressure, the rock core length and the like collected underground. After the instrument reaches a target stratum with a specified depth, pushing and setting actions are carried out, setting pressure is monitored in real time, after setting is good, the advancing speed of a drill bit and the drilling speed of a motor are automatically preset, the core is drilled for one time, the core type is judged according to the returned drilling pressure value, the drill bit speed value, the rotating speed and the current value of motor operation and the drilling parameters in a core parameter library, the proper drilling parameters are automatically selected again for setting, the setting is carried out, the setting position of the instrument is adjusted, and the core is drilled after setting is carried out again at the well position. The intelligent drilling can improve the drilling success rate and the integrity of a rock core, avoid the risk of drill jamming, improve the operation efficiency and shorten the well head occupation time.
The scheme of the embodiment of the invention at least comprises the following beneficial effects:
1. the power supply requirements of two high-voltage 500VDC/500W and 500VDC/3500W direct-current brushless motors of the underground instrument are met by the 7-core cable under the condition that the number of cable cores is limited by using a cable core multiplexing technology.
2. The underground instrument adopts two motors to respectively complete drilling operation for providing hydraulic power and rock cores, realizes independent control of the advancing speed of the drill bit and the rotating speed of the drill bit during coring, can be set in ground system software according to different stratums, is transmitted to a corresponding control circuit module of an underground control system through a cable, and can be applied to stratums of various geological conditions for operation.
3. The ground operating system increases the pre-fetching function of the rock core, realizes the intelligent coring function of the large-particle well wall coring instrument, overcomes the defect that coring operation completely depends on the experience of an operation engineer, and improves the success rate of the operation.
It will be understood by those of ordinary skill in the art that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.
Claims (10)
1. An electrical control system for side-wall coring, comprising: a ground electric control system and a downhole instrument electric control system; the ground electric control system comprises: the ground power supply and corollary equipment part, wherein, ground power supply and corollary equipment part includes: the cable comprises an alternating current power supply, a direct current power supply, a cable core distribution panel, a faucet and a cable; the downhole instrument electrical control system comprising: the motor control device comprises a first motor control drive circuit and a second motor control drive circuit; wherein:
the output end of the horse faucet is connected with the first motor control driving circuit and the second motor control driving circuit, and the input end of the horse faucet is respectively connected with the alternating current power supply and the direct current power supply through a cable core distribution panel;
the cable core distribution panel is arranged for distributing functions of the cable cores of the cable;
the first motor control drive circuit is arranged to control and drive the first motor;
the second motor control drive circuit is arranged to control and drive the second motor;
wherein the first motor and the second motor have different powers.
2. The electrical control system for side-wall coring of claim 1,
the output end of the alternating current power supply comprises: a first transformer having a secondary winding with a first center tap; two ends of a secondary winding of the first transformer are used as output ends of the alternating current power supply and are respectively connected with a first cable core and a second cable core of the cable through the faucet;
the positive output end of the first direct current power supply is connected with the first center tap;
the positive output end of the second direct current power supply is connected with the fifth cable core, the sixth cable core and the seventh cable core of the cable through the faucet; and the negative output ends of the first direct current power supply and the second direct current power supply are connected with the sheath of the cable.
3. The electrical control system for side-wall coring as claimed in any one of claims 1-2,
the ground electric control system further comprises: the device comprises a control module and a data acquisition module; wherein:
the data acquisition module is used for converting the underground data transmitted by the third cable core and the fourth cable core into data in a TTL level format and inputting the data in the TTL level format into the control module;
and the control module is used for processing the received TTL level format data to obtain a corresponding execution command and sending the execution command to the data acquisition module to be transmitted to an underground instrument for data acquisition.
4. The side-wall coring electrical control system of claim 2, wherein the downhole instrument electrical control system further comprises: the underground weak current power supply circuit module;
the weak current power supply circuit module in pit includes: an AC power supply section configured to supply AC power to the downhole; the alternating current power supply section includes: at least one second transformer;
two ends of the primary winding of the second transformer are connected with the first cable core and the second cable core;
the secondary winding of the second transformer is used as an alternating current input end of an underground alternating current electric instrument;
the primary winding of the second transformer has a second center tap;
one or more secondary windings of each second transformer;
when the secondary windings of the second transformer are multiple, different secondary windings of the second transformer output alternating currents with different voltages.
5. The electrical side-wall coring system of claim 4, wherein the downhole instrument power supply further comprises: the direct current power supply part is used for providing direct current power supply for the underground;
the direct current supply section includes: the first direct current positive electrode lead, the first direct current negative electrode lead, the second direct current positive electrode lead and the second direct current negative electrode lead;
the first end of the first direct current positive wire is connected with the second center tap, and the second end of the first direct current positive wire is connected with a control driving circuit of the first underground motor;
the first end of the first direct current negative electrode lead is connected with the sheath of the cable, and the second end of the first direct current negative electrode lead is connected with a control driving circuit of the first underground motor;
the first end of the second direct-current positive electrode lead is connected with the bridle head, and the second end of the second direct-current positive electrode lead is connected with a control driving circuit of the underground second motor;
and the first end of the second direct-current negative electrode lead is connected with the sheath of the cable, and the second end of the second direct-current negative electrode lead is connected with a control driving circuit of the underground second motor.
6. The side-wall coring electrical control system of claim 5, wherein the downhole tool electrical control system further comprises: the underground communication system comprises a main control circuit module and an underground communication module;
the underground communication module is connected with the underground weak current power supply circuit module and the main control circuit module, and is used for converting a man code instruction transmitted from the ground into a TTL level instruction and transmitting the TTL level instruction to the main control circuit module; meanwhile, the data frame in the TTL level format transmitted by the main control circuit module is converted into a data frame in a Manchester code format and is transmitted to the ground electric control system by utilizing a third cable core and a fourth cable core in the cable;
and the main control circuit module is connected with the underground communication module and used for receiving the command instruction sent by the underground communication module and transmitting the command instruction to each node circuit module of the underground instrument through an RS485 bus.
7. The electrical side-wall coring system of claim 6, wherein the electrical downhole tool control system further comprises: the device comprises a natural gamma circuit module, an underground pressure measuring circuit module and a rock core length measuring circuit module;
the natural gamma circuit module is connected with the underground weak current power supply circuit module and the main control circuit module and is used for measuring depth position information of a stratum and transmitting the measured depth position information to the main control circuit module;
the underground pressure measurement circuit module is connected with the underground weak current power supply circuit module and the main control circuit module, and is used for acquiring signals of a pushing pressure sensor and a coring pressure sensor and transmitting the acquired signals to the main control circuit module;
the core length measuring circuit module is connected with the underground weak current power supply circuit module and the main control circuit module and is used for monitoring and determining well depth position data corresponding to the side-wall coring;
the main control circuit module is respectively connected with the natural gamma circuit module, the underground pressure measuring circuit module and the rock core length measuring circuit module, and is used for receiving data collected by the connected circuit modules, combining the data into a data frame and sending the data frame to the underground communication module as underground data.
8. The electrical side-wall coring system of claim 5, wherein the DC voltage comprises one or more of: +5V, + 12V, +18V and + -24V.
9. The electrical side-wall coring system of claim 1,
the cable core distribution panel is used for carrying out function distribution on the cable core of the cable and comprises the following steps: when the direct current power supply comprises a first direct current power supply and a second direct current power supply, the cable core distribution panel distributes the first cable core and the second cable core of the cable to transmit alternating current, and the first direct current power supply multiplexes the first cable core and the second cable core occupied by the alternating current power supply to transmit direct current of the first direct current power supply and supply direct current to the first motor; and the fifth cable core, the sixth cable core and the seventh cable core of the cable transmit direct current of a second direct current power supply and supply direct current to the second motor.
10. The electrical side-wall coring system of claim 9, wherein the multiplexing is a multiplexing of ac and dc co-transmission with a cable core.
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