CN214756418U - Stratum test data bidirectional wired transmission system applied to offshore logging platform - Google Patents
Stratum test data bidirectional wired transmission system applied to offshore logging platform Download PDFInfo
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- CN214756418U CN214756418U CN202120968558.4U CN202120968558U CN214756418U CN 214756418 U CN214756418 U CN 214756418U CN 202120968558 U CN202120968558 U CN 202120968558U CN 214756418 U CN214756418 U CN 214756418U
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Abstract
The utility model discloses a be applied to two-way wired transmission system of formation test data of offshore logging platform, include: the system comprises a ground control subsystem, an underground remote transmission supporting cylinder and an underground communication subsystem; the remote transmission support cylinder in pit includes: the system comprises an upper connecting joint, a lower connecting joint, an outer protective cylinder, a cable driver, a second controller, an OFDM modulator, an FSK demodulator and a first single bus driver; the downhole communication subsystem comprises: the system comprises a plurality of underground communication short sections, a single bus cable, a plurality of terminal communication buses and a plurality of underground measurement terminals; the cable driver is in bidirectional communication connection with the ground control subsystem through a logging cable; the first single bus driver is in bidirectional communication connection with the plurality of underground communication short sections through single bus cables; and the underground communication short section is in bidirectional communication connection with the underground measurement terminals through a terminal communication bus. The utility model discloses a real-time supervision is work progress in the pit, real-time real feedback shaft bottom condition has improved formation testing efficiency by a wide margin.
Description
Technical Field
The utility model belongs to the technical field of the oil well logging, concretely relates to be applied to two-way wired transmission system of formation test data of offshore logging platform.
Background
During the exploration and development of oil and gas fields, logging must be carried out after drilling so as to know the oil and gas containing condition of the stratum. At present, after drilling is completed, a storage type underground measuring terminal is placed to test, the storage type underground measuring terminal can collect and receive logging signals and store the logging signals, after logging construction is finished, the storage type underground measuring terminal is taken out, data in an instrument memory are read out through software of special logging data information, the logging data can be obtained only after logging is finished, the logging data cannot be obtained in real time in a logging process, oil testing efficiency is low, complex conditions occur underground, the storage pressure gauge and other measuring terminals can face the conditions that the ground cannot be taken out, the data cannot be obtained in time, secondary oil testing operation needs to be carried out, and the logging cost is greatly increased.
SUMMERY OF THE UTILITY MODEL
In order to solve the above-mentioned problem that exists among the prior art, the utility model provides a be applied to marine logging platform's two-way wired transmission system of formation test data. The to-be-solved technical problem of the utility model is realized through following technical scheme:
a two-way wired transmission system of formation test data applied to an offshore logging platform comprises: the system comprises a ground control subsystem, an underground remote transmission supporting cylinder and an underground communication subsystem;
the downhole telemetry cartridge comprises: the system comprises an upper connecting joint, a lower connecting joint, an outer protective cylinder, a cable driver, a second controller, an OFDM modulator, an FSK demodulator and a first single bus driver;
one end of the outer protective cylinder is fixedly connected with the upper connecting joint, and the other end of the outer protective cylinder is fixedly connected with the lower connecting joint; the cable driver, the second controller, the OFDM modulator, the FSK demodulator and the first single bus driver are all fixedly arranged in the outer protective cylinder;
the downhole communication subsystem comprising: the system comprises a plurality of underground communication short sections, a single bus cable, a plurality of terminal communication buses and a plurality of underground measurement terminals;
the input end of the second controller is electrically connected with the output end of the FSK demodulator, the output end of the second controller is electrically connected with the input end of the OFDM modulator, and the second controller is in bidirectional communication connection with the first single bus driver;
the input end of the FSK demodulator is electrically connected with the output end of the cable driver;
the output end of the OFDM modulator is electrically connected with the input end of the cable driver;
the cable driver is in bidirectional communication connection with the ground control subsystem through a logging cable;
the first single bus driver is in bidirectional communication connection with the plurality of downhole communication short sections through the single bus cable;
and the underground communication short section is in bidirectional communication connection with the underground measurement terminals through the terminal communication bus.
In an embodiment of the present invention, the ground control subsystem includes: the system comprises a first controller, an OFDM demodulator, an FSK modulator, a downhole interface and an upper computer interface;
the first controller is in bidirectional communication connection with the upper computer interface, the output end of the first controller is electrically connected with the input end of the FSK modulator, and the input end of the first controller is electrically connected with the output end of the OFDM demodulator;
the output end of the FSK modulator is electrically connected with the input end of the underground interface;
the input end of the OFDM demodulator is electrically connected with the output end of the underground interface;
the downhole interface is in bidirectional communication with the wireline driver via the wireline.
In an embodiment of the present invention, the ground control subsystem further includes: a downhole power supply;
and the underground power supply is electrically connected with the logging cable through the underground interface so as to supply power to the underground remote transmission supporting cylinder and the underground communication subsystem.
In an embodiment of the present invention, the downhole remote transmitting support cylinder further includes: a DC-DC power supply;
and the input end of the DC-DC power supply is electrically connected with the cable driver, and the output end of the DC-DC power supply is electrically connected with the first single bus driver, the OFDM modulator, the FSK demodulator and the second controller.
In an embodiment of the present invention, the downhole communication nipple comprises: the system comprises a third controller, a second single bus driver, a terminal communication bus driver and a terminal interface component;
the second single-bus driver is in bidirectional communication connection with the first single-bus driver through the single-bus cable;
the third controller is in bidirectional communication connection with the second single bus driver and the terminal communication bus driver;
the terminal communication bus driver is in bidirectional communication connection with the terminal interface component;
the terminal interface assembly is in bidirectional communication connection with the plurality of underground measuring terminals through the terminal communication bus.
The utility model discloses an embodiment, the communication nipple joint still includes in the pit: the terminal power supply, the power converter and the standby power supply interface;
the input end of the terminal power supply is electrically connected with the output end of the second single bus driver, and the output end of the terminal power supply is electrically connected with the input end of the power converter, the third controller and the terminal communication bus driver;
the input end of the power converter is electrically connected with the standby power interface, and the output end of the power converter is electrically connected with the terminal interface component.
In an embodiment of the present invention, the communication mode of the single bus cable is an AMI communication mode;
the communication mode of the terminal communication bus is an RS-485 communication mode.
In an embodiment of the present invention, the logging cable is a single-core armored cable or a single-core steel pipe cable; the unibus cable is a single-core armored cable or a single-core steel pipe cable.
The utility model has the advantages that:
the utility model discloses an adopt the logging cable to carry out two-way communication connection between ground control subsystem and the teletransmission support cylinder in the pit, adopt the unibus cable to carry out two-way communication connection between teletransmission support cylinder in the pit and the underground communication subsystem, the detection data of having realized underground measuring terminal can real-time transmission to the ground control subsystem in, and then can real-time transmission carry out the use of data in to the backstage host computer, can real-time supervision underground construction process (switch-well, pressure recovery, the perforation, acidizing fracturing, flowing back operation etc.), real-time real feedback shaft bottom condition, data such as the pressure recovery data that underground measuring terminal during the test gathered can acquire in real time, the test oil efficiency has been improved by a wide margin, the cost is practiced thrift.
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Drawings
Fig. 1 is a schematic structural diagram of a two-way wired transmission system for formation testing data applied to an offshore logging platform according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a downhole telemetry cartridge provided by an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a two-way wired transmission system for formation testing data applied to an offshore logging platform according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a ground control subsystem provided in an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a downhole telemetry cartridge provided by an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a downhole communication nipple provided by the embodiment of the present invention;
fig. 7 is a schematic structural diagram of a two-way wired transmission system for formation testing data applied to an offshore logging platform according to an embodiment of the present invention.
Description of reference numerals:
10-a ground control subsystem; 11-a first controller; 12-an OFDM demodulator; 13-an FSK modulator; 14-a downhole interface; 15-upper computer interface; 16-a downhole power supply; 20-underground remote transmission supporting cylinder; 21-a cable driver; 22-OFDM modulator; 23-a second controller; 24-FSK demodulator; 25-a first single bus driver; 26-upper connecting joint; 27-lower connection joint; 28-outer protective sleeve; 29-DC-DC power supply; 30-a downhole communication sub; 31-single bus cable; 32-terminal communication bus; 33-downhole measurement terminal; 34-a second single bus driver; 35-a third controller; 36-terminal communication bus driver; 37-a terminal interface component; 38-terminal power supply; 39-a power converter; 40-a standby power interface; 50-wireline.
Detailed Description
The present invention will be described in further detail with reference to specific examples, but the present invention is not limited thereto.
Example one
Referring to fig. 1 and 2, a bidirectional wired transmission system for formation testing data applied to an offshore logging platform includes: a surface control subsystem 10, a downhole telemetry cartridge 20 and a downhole communication subsystem. A downhole telemetry cartridge 20, comprising: a cable driver 21, a second controller 23, an OFDM modulator 22, an FSK demodulator 24 and a first single bus driver 25. The downhole telemetry cartridge 20 further comprises an upper connecting joint 26, a lower connecting joint 27 and an outer cartridge 28, one end of the outer cartridge 28 is fixedly connected and sealed with the upper connecting joint 26, the other end of the outer cartridge 28 is fixedly connected and sealed with the lower connecting joint 27, and the cable driver 21, the second controller 23, the OFDM modulator 22, the FSK demodulator 24 and the first single-bus driver 25 are all fixedly arranged in the outer cartridge 28. A downhole communication subsystem comprising: a plurality of downhole communication subs 30, a single bus cable 31, a plurality of terminal communication buses 32, and a plurality of downhole measurement terminals 33. In this embodiment, the ground control subsystem 10 is electrically connected to an external upper computer, and when logging is performed, the uplink data transmission process is as follows: the underground measurement terminal 33 detects and collects underground parameters, underground data collected by the underground measurement terminal 33 is transmitted to the underground communication nipple 30 through the terminal communication bus 32, the underground communication nipple 30 transmits the underground data to the underground remote transmission supporting cylinder 20 through the single bus cable 31, then the underground remote transmission supporting cylinder 20 transmits the underground data to the ground control subsystem 10 through the logging cable 50, the ground control subsystem 10 transmits the underground data to an upper computer, and the upper computer processes and stores the data. The downlink data transmission process comprises: the ground control instruction is transmitted to a ground subsystem by an upper computer, the ground subsystem transmits the control instruction to the underground telemetry cartridge 20 through the logging cable 50, then the underground telemetry cartridge 20 transmits the control instruction to the underground communication nipple 30 through the single bus cable 31, the underground communication nipple 30 receives the control instruction or transmits the control instruction to the underground measurement terminal 33 through the terminal communication bus 32, and the underground measurement terminal 33 works according to the control instruction.
An input end of the second controller 23 is electrically connected with an output end of the FSK demodulator 24, an output end of the second controller 23 is electrically connected with an input end of the OFDM modulator 22, and the second controller 23 is connected with the first single bus driver 25 in bidirectional communication. An input terminal of the FSK demodulator 24 is electrically connected to an output terminal of the cable driver 21. The output of the OFDM modulator 22 is electrically connected to the input of the cable driver 21. The wireline driver 21 is in bi-directional communication with the surface control subsystem 10 via a wireline cable 50. The first single bus drive 25 is bidirectionally communicatively connected to a plurality of downhole communication subs 30 via a single bus cable 31. The downhole communication sub 30 is in bidirectional communication with a plurality of downhole measurement terminals 33 via a terminal communication bus 32.
In this embodiment, after the downhole communication sub 30 sends the downhole data to the second controller 23, the downhole data is modulated into an OFDM code by an OFDM (Orthogonal Frequency Division Multiplexing) modulator, and is driven to the logging cable 50 by the cable driver 21 to be transmitted to the surface control subsystem 10. When the ground control subsystem 10 sends a control instruction to the downhole telemetry cartridge 20, the logging cable 50 transmits the control instruction to an FSK (Frequency Shift Keying) demodulator through the cable driver 21, the FSK demodulator 24 demodulates the control instruction into binary data and transmits the binary data to the second controller 23, the second controller 23 responds to the control instruction and/or transmits the control instruction to the first single-bus driver 25, and the first single-bus driver 25 drives the control instruction to the single-bus cable 31 and transmits the control instruction to the communication nipple 30.
In the embodiment, the ground control subsystem 10 and the downhole telemetry cartridge 20 are in bidirectional communication connection through the logging cable 50, and the downhole telemetry cartridge 20 and the downhole communication subsystem are in bidirectional communication connection through the single bus cable 31, so that detection data of the downhole measurement terminal 33 can be transmitted to the ground control subsystem 10 in real time, and then can be transmitted to a background upper computer in real time for data use, the downhole construction process (well opening and closing, pressure recovery, perforation, acidizing fracturing, liquid drainage operation and the like) can be monitored in real time, real-time and real downhole conditions can be fed back, data such as pressure recovery data collected by the downhole measurement terminal 33 during testing can be obtained in real time, and the oil testing efficiency is greatly improved. The field operation can be controlled and adjusted in real time, the accuracy and effectiveness of control are improved, and the cost is saved.
Meanwhile, the transmitted data is modulated and demodulated through the OFDM modulator 22 and the FSK demodulator 24, and the system data is ensured to be transmitted quickly and effectively.
In a feasible implementation manner, as shown in fig. 3, the single bus cable 31 may be divided into a main cable and a plurality of branches, the plurality of branches are electrically connected to the main cable and can perform bidirectional data transmission, each downhole communication sub 30 is electrically connected to one branch cable and can perform bidirectional data transmission, all downhole communication sub 30 perform uplink data transmission and transmit the uplink data through the main cable, and downlink data transmission and transmit the downlink data through the main cable to the downhole communication sub 30 connected to each branch cable. Downhole measurement terminal 33 includes, but is not limited to, a pressure gauge and a pressure gauge adapter, among others.
In one possible implementation, one downhole communication sub 30 may connect to multiple downhole measurement terminals 33. The number of the downhole communication sub 30 can be 1 to 8, and the number of the downhole measurement terminals 33 which can be connected with one downhole communication sub 30 is 1 to 4.
In one possible implementation, one end of the logging cable 50 is electrically connected to the surface control subsystem 10, the other end of the logging cable penetrates the upper connector 26 into the outer casing 28 to be electrically connected to the cable driver 21, one end of the single-bus cable 31 penetrates the lower connector 27 into the outer casing 28 to be electrically connected to the first single-bus driver 25, and the other end of the single-bus cable is electrically connected to the downhole communication sub 30. Both the downhole telemetry cartridge 20 and the downhole communication subsystem are located downhole.
Example two
As shown in fig. 4, on the basis of the first embodiment, the present embodiment further defines that the ground control subsystem 10 includes: a first controller 11, an OFDM demodulator 12, an FSK modulator 13, a downhole interface 14 and an upper computer interface 15. The first controller 11 is connected with the upper computer interface 15 in a bidirectional communication manner, the output end of the first controller 11 is electrically connected with the input end of the FSK modulator 13, and the input end of the first controller 11 is electrically connected with the output end of the OFDM demodulator 12. The output of the FSK modulator 13 is electrically connected to the input of the downhole interface 14. An input of the OFDM demodulator 12 is electrically connected to an output of the downhole interface 14. The downhole interface 14 is in bi-directional communication with the wireline driver 21 via a wireline cable 50.
In this embodiment, when performing logging operation, the working process of the ground control subsystem 10 is as follows: the cable driver 21 of the downhole telemetry cartridge 20 drives downhole data (data modulated by the OFDM modulator 22) to the logging cable 50 to be transmitted to the OFDM demodulator 12 through the downhole interface 14 for demodulation, and the OFDM demodulator 12 converts the OFDM modulated signal into a data code stream and transmits the data code stream to the first controller 11, and then transmits the data code stream to the upper computer through the upper computer interface 15. Correspondingly, the upper computer sends a control command to the first controller 11 through the upper computer interface 15, modulates the command into an FSK code through the FSK modulator 13, transmits the FSK code to the logging cable 50 through the downhole interface 14, transmits the FSK code to the FSK demodulator 24 through the cable driver 21 of the remote transmitting support cylinder, and demodulates and transmits the FSK code to the second controller 23 through the FSK demodulator 24.
The downhole interface 14 also has functions of power supply, data coupling, and data separation, among others. Both the logging cable 50 and the single bus cable 31 may power and communicate the associated components.
The ground control subsystem 10 and the downhole remote transmission support cylinder 20 of the embodiment cooperate with each other to modulate and demodulate data and transmit the data, so that the data transmission efficiency is further improved.
Further, as shown in fig. 4, the ground control subsystem 10 further includes: a downhole power supply 16. The downhole power supply 16 is electrically connected to the logging cable 50 through the downhole interface 14 to provide power to the downhole telemetry cartridge 20 and the downhole communication subsystem. The underground power supply 16 converts 220V AC of mains supply into an isolated DC power supply, and the isolated DC power supply is connected into the logging cable 50 through the underground interface 14 and finally provides DC power for the underground telemetry cartridge 20, the underground communication short section 30 and the underground measurement terminal 33.
In one possible implementation, the electronics of the ground control subsystem may be located in a variable frequency cabinet on the ground.
Further, as shown in fig. 5, the downhole telemetry cartridge 20 further includes: a DC-DC power supply 29. An input terminal of the DC-DC power supply 29 is electrically connected to the cable driver 21, and an output terminal of the DC-DC power supply 29 is electrically connected to an input terminal of the first single bus driver 25, an input terminal of the OFDM modulator 22, an input terminal of the FSK demodulator 24, and an input terminal of the second controller 23. In this embodiment, the cable driver 21 separates electric energy from signals, the electric energy is input into the DC-DC power supply 29, the DC-DC power supply 29 converts DC power supplied on the logging cable 50 into low-voltage direct current of the single-bus cable 31, and the converted electric energy is transmitted to the single-bus cable 31 through the first single-bus driver 25 to supply power to the downhole communication sub 30 and the downhole measurement terminal 33, and simultaneously the first single-bus driver 25, the OFDM modulator 22, the FSK demodulator 24, and the second controller 23 are input with electric energy to supply power.
Further, as shown in fig. 6, the downhole communication sub 30 includes: a third controller 35, a second single bus driver 34, a terminal communication bus driver 36 and a terminal interface component 37. The second single bus driver 34 is bidirectionally communicatively connected to the first single bus driver 25 via the single bus cable 31. The third controller 35 is bidirectionally communicatively connected to the second single bus driver 34 and the terminal communication bus driver 36. The terminal communication bus driver 36 is in bi-directional communication with the terminal interface module 37. The terminal interface assembly 37 is in bi-directional communication with a plurality of downhole measurement terminals 33 via a terminal communication bus 32.
In this embodiment, during logging operation and uplink data transmission, the downhole measurement terminal 33 performs downhole parameter detection and acquisition, the downhole data acquired by the downhole measurement terminal 33 is transmitted to the terminal communication bus driver 36 through the terminal communication bus 32 via the terminal interface component 37, the terminal communication bus driver 36 transmits the data to the third controller 35, and the third controller 35 drives the downhole data to the single-bus cable 31 via the second single-bus driver 34 to be transmitted to the first single-bus driver 25, and then transmits the downhole data to the second controller 23. When data is transmitted in a downlink mode: the second controller 23 drives the control command demodulated by the FSK demodulator 24 to the single-bus cable 31 through the first single-bus driver 25, transmits the control command to the second single-bus driver 34, and then transmits the control command to the third controller 35, the third controller 35 receives the control command or transmits the control command to the downhole measurement terminal 33 through the terminal communication bus driver 36 and the terminal interface component 37 through the terminal communication bus 32, and the downhole measurement terminal 33 works according to the control command.
In one possible implementation, the terminal assembly interface includes a plurality of terminal interfaces, each of which may be electrically connected to one of the downhole measurement terminals 33 for bi-directional data transfer.
Further, as shown in fig. 6, the downhole communication sub 30 further includes: a terminal power supply 38, a power converter 39 and a backup power interface 40. An input of termination power supply 38 is electrically connected to an output of second uni-bus driver 34 and an output of termination power supply 38 is electrically connected to an input of power converter 39, an input of third controller 35 and an input of termination communication bus driver 36. The input of power converter 39 is also electrically connected to a backup power interface 40 and the output of power converter 39 is electrically connected to terminal interface assembly 37. In this embodiment, the second single bus driver 34 separates the power on the single bus cable 31 from the signal, and the power is input to the termination power supply 38 to power the termination power supply 38, and the signal is input to the third controller 35. A terminal power supply 38 may provide power to the third controller 35, the terminal communication bus driver 36, and the downhole measurement terminal 33.
In this embodiment, the power converter 39 is electrically connected to an external backup power source through the backup power source interface 40, the power converter 39 is configured to supply power to the downhole measurement terminal 33 through the terminal interface assembly 37 from the terminal power source 38 or the backup power source, and the power converter 39 may supply power to the downhole measurement terminal 33 from the terminal power source 38 or may switch to the backup power source to supply power to the downhole measurement terminal 33.
In this embodiment, in a normal operation state, the terminal power supply 38 supplies power to the downhole measurement terminal 33 through the power converter 39 and the terminal interface assembly 37, and when a cable of the terminal power supply 38 fails, the power converter 39 can be switched to a standby power supply to ensure that the downhole measurement terminal 33 continuously collects data and maintain normal operation of the system.
In this embodiment, as shown in fig. 7, when performing logging operation, the specific uplink data transmission process is as follows: the downhole measurement terminal 33 detects and acquires downhole parameters, downhole data acquired by the downhole measurement terminal 33 is transmitted to a terminal communication bus driver 36 through a terminal communication bus 32 via a terminal interface component 37, the terminal communication bus driver 36 transmits the data to a third controller 35, the third controller 35 drives the downhole data to a single bus cable 31 via a second single bus driver 34 to be transmitted to a first single bus driver 25, then the downhole data is transmitted to a second controller 23, the second controller 23 transmits the downhole data to an OFDM modulator 22, the downhole data is modulated into OFDM codes by the OFDM modulator 22 and is driven to a logging cable 50 via a cable driver 21 to be transmitted to the downhole interface 14, the data modulated by the OFDM modulator 22 is transmitted to the OFDM demodulator 12 via the downhole interface 14 to be demodulated, the OFDM demodulator 12 converts the OFDM modulation signals into data code streams and transmits the data streams to the first controller 11, the first controller 11 transmits the data to the upper computer through the upper computer interface 15.
The specific process of downlink data transmission is as follows: the upper computer sends a control command to the first controller 11 through the upper computer interface 15, the control command is modulated into FSK codes through the FSK modulator 13, the FSK codes are transmitted to the logging cable 50 through the downhole interface 14 and are transmitted to the FSK demodulator 24 through the cable driver 21, the control instruction is demodulated and transmitted to the second controller 23 through the FSK demodulator 24, the second controller 23 responds to the control instruction and/or transmits the control instruction to the first single-bus driver 25, the first single-bus driver 25 drives the control instruction to the single-bus cable 31 to be transmitted to the second single-bus driver 34 and then transmitted to the third controller 35, the third controller 35 receives the control instruction to respond or transmits the control instruction to the downhole measurement terminal 33 through the terminal communication bus driver 36 and the terminal interface component 37 through the terminal communication bus 32, and the downhole measurement terminal 33 works according to the control instruction.
Further, the single bus cable 31 is an AMI (Alternate Mark Inversion) communication system. AMI is a bipolar code, which is a coding scheme. The communication mode of the terminal communication bus 32 is an RS-485 communication mode.
Further, the logging cable 50 is a single-core armored cable or a single-core steel pipe cable; the unibus cable 31 is a single-core armored cable or a single-core steel pipe cable, so that the control system can stably operate for a long time in a high-temperature and high-pressure working environment, and the service life is prolonged.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.
The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.
Claims (8)
1. A two-way wired transmission system of formation test data for an offshore logging platform, comprising: the system comprises a ground control subsystem (10), an underground remote transmission support cylinder (20) and an underground communication subsystem;
the downhole telemetry cartridge (20) comprising: an upper connection joint (26), a lower connection joint (27), an outer cylinder (28), a cable driver (21), a second controller (23), an OFDM modulator (22), an FSK demodulator (24) and a first single bus driver (25);
one end of the outer protective cylinder (28) is fixedly connected with the upper connecting joint (26), and the other end of the outer protective cylinder is fixedly connected with the lower connecting joint (27); the cable driver (21), the second controller (23), the OFDM modulator (22), the FSK demodulator (24) and the first single bus driver (25) are all fixedly arranged in an outer protective cylinder (28);
the downhole communication subsystem comprising: the system comprises a plurality of underground communication short sections (30), a single bus cable (31), a plurality of terminal communication buses (32) and a plurality of underground measurement terminals (33);
the input end of the second controller (23) is electrically connected with the output end of the FSK demodulator (24), the output end of the second controller is electrically connected with the input end of the OFDM modulator (22), and the second controller (23) is in bidirectional communication connection with the first single-bus driver (25);
the FSK demodulator (24) with the input end electrically connected with the output end of the cable driver (21);
the OFDM modulator (22), the output end is electrically connected with the input end of the cable driver (21);
the cable driver (21) is in bidirectional communication connection with the surface control subsystem (10) through a logging cable (50);
the first single bus driver (25) is in bidirectional communication connection with the plurality of downhole communication sub (30) through the single bus cable (31);
the underground communication short joint (30) is in bidirectional communication connection with the plurality of underground measurement terminals (33) through the terminal communication bus (32).
2. A system for bi-directional wireline transmission of formation testing data for use with an offshore logging platform as claimed in claim 1, wherein the surface control subsystem (10) comprises: the system comprises a first controller (11), an OFDM demodulator (12), an FSK modulator (13), a downhole interface (14) and an upper computer interface (15);
the first controller (11) is in bidirectional communication connection with the upper computer interface (15), the output end of the first controller is electrically connected with the input end of the FSK modulator (13), and the input end of the first controller is electrically connected with the output end of the OFDM demodulator (12);
the output end of the FSK modulator (13) is electrically connected with the input end of the downhole interface (14);
the OFDM demodulator (12) with an input electrically connected to an output of the downhole interface (14);
the downhole interface (14) is in bi-directional communication with the wireline driver (21) via the wireline cable (50).
3. The system of claim 2, wherein the surface control subsystem (10) further comprises: a downhole power supply (16);
the downhole power supply (16) is electrically connected with the logging cable (50) through the downhole interface (14) to supply power to the downhole telemetry cartridge (20) and the downhole communication subsystem.
4. The system of claim 3, wherein the downhole telemetry cartridge (20) further comprises: a DC-DC power supply (29);
the DC-DC power supply (29) has an input end electrically connected to the cable driver (21) and an output end electrically connected to the first single bus driver (25), the OFDM modulator (22), the FSK demodulator (24), and the second controller (23).
5. A system for bidirectional wireline transmission of formation testing data for an offshore logging platform according to claim 4, wherein the downhole communication sub (30) comprises: a third controller (35), a second single bus driver (34), a terminal communication bus driver (36) and a terminal interface component (37);
the second single-bus driver (34) is in bidirectional communication connection with the first single-bus driver (25) through the single-bus cable (31);
the third controller (35) is in bidirectional communication connection with the second single-bus driver (34) and the terminal communication bus driver (36);
the terminal communication bus driver (36) is in bidirectional communication connection with the terminal interface component (37);
the terminal interface assembly (37) is in bi-directional communication with the plurality of downhole measurement terminals (33) via the terminal communication bus (32).
6. A system for bidirectional wireline transmission of formation testing data for an offshore logging platform according to claim 5, wherein the downhole communication sub (30) further comprises: a terminal power supply (38), a power converter (39) and a backup power interface (40);
the terminal power supply (38) has an input electrically connected to the output of the second single bus driver (34) and an output electrically connected to the input of the power converter (39), the third controller (35) and the terminal communication bus driver (36);
the input end of the power converter (39) is also electrically connected with the standby power interface (40), and the output end of the power converter is electrically connected with the terminal interface component (37).
7. The system for the bidirectional wired transmission of formation test data applied to an offshore logging platform according to claim 6, wherein the communication mode of the single-bus cable (31) is an AMI communication mode;
the communication mode of the terminal communication bus (32) is an RS-485 communication mode.
8. The system for the bidirectional wired transmission of formation test data applied to an offshore logging platform according to claim 7, wherein the logging cable (50) is a single-core armored cable or a single-core steel pipe cable; the unibus cable (31) is a single-core armored cable or a single-core steel pipe cable.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116950618A (en) * | 2023-09-18 | 2023-10-27 | 西安洛科电子科技股份有限公司 | Electromagnetic coupling type wireless power supply and communication cable intelligent separate mining system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116950618A (en) * | 2023-09-18 | 2023-10-27 | 西安洛科电子科技股份有限公司 | Electromagnetic coupling type wireless power supply and communication cable intelligent separate mining system |
| CN116950618B (en) * | 2023-09-18 | 2024-01-02 | 西安洛科电子科技股份有限公司 | Electromagnetic coupling type wireless power supply and communication cable intelligent separate mining system |
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