CN210460635U - Wireless transmission device for cable head of over-drill logging instrument - Google Patents
Wireless transmission device for cable head of over-drill logging instrument Download PDFInfo
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- CN210460635U CN210460635U CN201920892879.3U CN201920892879U CN210460635U CN 210460635 U CN210460635 U CN 210460635U CN 201920892879 U CN201920892879 U CN 201920892879U CN 210460635 U CN210460635 U CN 210460635U
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Abstract
The utility model discloses a cross drill logging instrument cable head wireless transmission device, include: the upper wireless short joint (1) is arranged in the cable head and is used for information exchange between a ground system and a logging instrument; the lower wireless short joint (2) is arranged in the logging instrument fishing head and used for receiving the information of the ground system and sending the measurement information of the logging instrument to the ground system; the upper wireless short joint (1) comprises a first transmission coil (11), and the lower wireless short joint (2) comprises a second transmission coil (21). The utility model provides a unique coil coupling mode of cross drill logging appearance cable head wireless transmission device and the mode of decoding for received signal intensity is high, handles simply, is difficult for receiving complex environment's in the pit interference, has realized the transmission that cross drill logging appearance and cable head data are quick, accurate.
Description
Technical Field
The utility model belongs to the technical field of wireless transmission in the pit, concretely relates to cross drill head logging instrument cable head wireless transmission device.
Background
The over-the-bit logging (TBL) technology is a newly developed and increasingly mature logging data acquisition mode, and the method mainly utilizes a drill string and a drill bit as guide pipes to enter an open hole section to acquire formation evaluation data. Compared with cable logging operation, the over-drill logging technology can complete data acquisition without taking the drilling tool out of a well hole, so that the operation time is greatly saved; compared with logging while drilling, the over-drill logging technology does not need to carry out logging operation under the condition of vibration of a drilling tool, and the reliability and the stability of data acquisition are improved. Therefore, over the past few years, many companies both at home and abroad have been working on the fundamental research and application of over-the-bit logging techniques.
In the over-drilling head well logging system, the cable head and the well logging instrument are two complete independent systems, the well logging instrument is responsible for collecting and storing formation well logging data, the cable head is responsible for issuing ground instructions and sending up downhole data, and the cable head and the well logging instrument are not directly electrically connected. For the problem of how to transmit data stored by a logging instrument to a ground system through a cable head, two transmission modes exist at present, wherein one mode is real-time transmission through a cable connected with the logging instrument; the other method is to store the logging data in the downhole instrument in real time, and read the data in the instrument after the instrument is lifted to the ground.
However, the first method is wired transmission, the transceiver is complex, the transmission rate is low, the requirement for two pairs of instruments on batteries is high, a power supply battery is needed to provide power in the continuous operation process, and the transmission signals of the two methods are easily interfered by the complex underground environment, so that the accuracy of data transmission is influenced.
Disclosure of Invention
In order to solve the above-mentioned problem that exists among the prior art, the utility model provides a cross drill logging instrument cable head wireless transmission device. The to-be-solved technical problem of the utility model is realized through following technical scheme:
a wireless transmission device for cable heads of an over-the-bit logging instrument comprises:
an upper wireless short joint (1) arranged in the cable head and a lower wireless short joint (2) arranged in the logging instrument fishing head;
the upper wireless short section comprises a first transmission coil, and the lower wireless short section comprises a second transmission coil.
In an embodiment of the present invention, the first transmission coil includes a first winding set and a coil outer cylinder, the first winding set is wound on the coil outer cylinder, and the coil outer cylinder is connected to the cable head through a thread;
the second transmission coil comprises a second wrapping wire group and a coil inner tube, the second wrapping wire group is wound on the coil inner tube, and the coil inner tube is connected with the fishing head of the logging instrument through threads.
The utility model discloses an embodiment, go up wireless nipple joint still includes: the device comprises a first control unit, a first signal generation unit and a first signal receiving unit, wherein the first control unit is respectively connected with the first signal generation unit and the first signal receiving unit;
the lower wireless short section further comprises: the device comprises a second control unit, a second signal generating unit and a second signal receiving unit, wherein the second control unit is respectively connected with the second signal generating unit and the second signal receiving unit.
In an embodiment of the present invention, the first control unit includes a first CAN communication circuit, a first MCU processor and a first FPGA processor connected in sequence; the first CAN communication circuit is connected with a remote transmission circuit in the cable head, and the first FPGA processor is connected with the first signal generating unit and the first signal receiving unit;
the second control unit comprises a second CAN communication circuit, a second MCU processor and a second FPGA processor which are connected in sequence; the second CAN communication circuit is connected with a storage short section of the logging instrument, and the second FPGA processor is connected with the second signal generating unit and the second signal receiving unit.
In an embodiment of the present invention, the first signal generating unit includes a first driving circuit, a first low-pass filter circuit, a first modulation circuit, a first adjusting circuit, and a first power amplifying circuit, which are connected in sequence, wherein the first driving circuit and the first modulation circuit are connected to a first FPGA processor, and the first power amplifying circuit is connected to the first transmission coil;
the second signal generating unit comprises a second driving circuit, a second low-pass filter circuit, a second modulation circuit, a second adjusting circuit and a second power amplifying circuit which are sequentially connected, wherein the second driving circuit is connected with the second modulation circuit and the second FPGA processor, and the second power amplifying circuit is connected with the second transmission coil.
In an embodiment of the present invention, the first signal receiving unit includes a first pre-amplifier circuit, a first filter circuit, and a first demodulator circuit connected in sequence, wherein the first pre-amplifier circuit is connected to the first transmission coil, and the first demodulator circuit is connected to the first FPGA processor;
the second signal receiving unit comprises a second preceding stage amplifying circuit, a second filter circuit and a second demodulation circuit which are connected in sequence, wherein the second preceding stage amplifying circuit is connected with the second transmission coil, and the second demodulation circuit is connected with the second FPGA processor.
The utility model has the advantages that:
1. the unique coil coupling mode and decoding mode of the cable head wireless transmission device of the over-drill logging instrument provided by the utility model ensure that the received signal strength is high, the processing is simple, the interference of the complex environment in the well is not easy to be caused, and the rapid and accurate transmission of the over-drill logging instrument and the cable head data is realized;
2. the utility model provides a wireless transmission device of cable head of over-drilling logging instrument, which can change the best coupling coil according to different transmission rates, and the upper and lower wireless short section transmission coils have unique structural design and are easy to change;
3. the utility model provides a cross-drill logging instrument cable head wireless transmission device and method have lower error rate (bit error rate) under the transmission rate that reaches 500Kbps<1*10-5)；
4. The utility model provides a cross drill logging instrument cable head wireless transmission device simple structure has realized the wireless transmission of data between ground system and the logging instrument.
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Drawings
Fig. 1 is a schematic structural view of a wireless transmission device for a cable head of an over-drill logging unit according to an embodiment of the present invention;
fig. 2 is a schematic view of another wireless transmission device for a cable head of a drill logging unit according to an embodiment of the present invention;
fig. 3 is a data processing flow chart of the ground line system for transmitting information to the logging tool according to the embodiment of the present invention;
fig. 4 is a schematic diagram of a data transmission path of a cable head wireless transmission device of an over-drill logging unit provided by an embodiment of the present invention.
The reference numbers illustrate: the method comprises the following steps of 1, an upper wireless short section, 2, a lower wireless short section, 3, a cable head, 4, a logging instrument, 5, a fishing head, 6, a remote transmission circuit, 7, a logging cable, 8, a drill bit, 9, a drill rod, 11, a first transmission coil and 21, a second transmission coil.
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, fig. 1 is a schematic structural diagram of a cable head wireless transmission device of a logging unit for over-drilling according to an embodiment of the present invention, including:
the upper wireless short joint 1 is arranged in the cable head and used for exchanging information between a ground system and a logging instrument;
the lower wireless short joint 2 is arranged in the logging instrument fishing head and used for receiving the information of the ground system and sending the measurement information of the logging instrument to the ground system;
the upper wireless short section 1 comprises a first transmission coil 11, and the lower wireless short section 2 comprises a second transmission coil 21.
The utility model provides a two sections completely independent mechanical structure about the cross-drill logging instrument cable head wireless transmission device adopts, goes up wireless nipple joint and installs in the cable head, and lower wireless nipple joint is installed in the instrument is salvaged first, and upper and lower two sections all possess the transmission and receive function, when the cable head snatchs the head to the instrument, the nipple joint cooperation was used and is realized the communication from top to bottom. The structure reduces the structure length to the maximum extent while realizing the wireless transmission of logging data stored by an underground instrument, the reception of ground commands and configuration parameters, and reduces the influence of well hole environments such as drilling fluid, a drill rod and the like on data transmission to the minimum.
Referring to fig. 2, fig. 2 is a schematic view illustrating an application and installation of another wireless transmission device for a cable head of a drill logging unit according to an embodiment of the present invention.
In this embodiment, the first transmission coil 11 includes a first wrapped winding group and a coil outer cylinder, the first wrapped winding group is wound on the coil outer cylinder, and the coil outer cylinder is connected with the cable head 3 through a thread;
the second transmission coil 21 comprises a second wrapping group and a coil inner barrel, the second wrapping group is wound on the coil inner barrel, and the coil inner barrel is connected with the fishing head 5 of the logging instrument 4 through threads.
In this embodiment, the cable head 3 is further provided with a telemetry circuit 6, which connects the upper wireless short joint 1 and the logging cable 7, and is used for transmitting ground information to the underground and transmitting the underground information to a ground system through the cable.
In this embodiment, the logging unit 4 further includes a drill bit 8 and a drill rod 9, the drill bit 8 is connected to the drill rod 9, and the cable head 3, the fishing head 5 and the logging cable 7 are all disposed in the drill rod 9. When the cable head 3 reaches the position of the overshot head 5 of the tool, data transmission is started.
In this embodiment, the upper wireless short 1 further includes: the device comprises a first control unit, a first signal generation unit and a first signal receiving unit, wherein the first control unit is respectively connected with the first signal generation unit and the first signal receiving unit;
lower wireless nipple 2 still includes: the second control unit is respectively connected with the second signal generating unit and the second signal receiving unit.
In this embodiment, the ground system sends data to a first control unit through a remote transmission circuit, and the first control unit carries out corresponding processing to the data, then transmits to a first signal generating unit, and the first signal generating unit further processes the data to convert the electrical signal into a magnetic signal and send out through a first transmission coil. The second transmission coil receives the magnetic signal, converts the magnetic signal into an electric signal and transmits the electric signal to the second signal receiving unit, the second signal receiving unit processes the received data and transmits the processed data to the second control unit, and the second control unit processes the data and transmits the processed data to the logging instrument for corresponding parameter configuration.
And then, the logging instrument transmits the measured data to a second control unit for processing, then transmits the measured data to a second signal generating unit, sends the magnetic signals through a second transmission coil after processing, receives the magnetic signals through the first transmission coil, transmits the magnetic signals to a first signal receiving unit for processing, transmits the magnetic signals to a remote transmission circuit after being processed through the first control unit, and finally transmits the magnetic signals back to a ground system.
In this embodiment, the first control unit includes a first CAN communication circuit, a first MCU processor, and a first FPGA processor, which are connected in sequence; the first CAN communication circuit is connected with a remote transmission circuit in the cable head, and the first FPGA processor is connected with the first signal generating unit and the first signal receiving unit;
the second control unit comprises a second CAN communication circuit, a second MCU processor and a second FPGA processor which are connected in sequence; the second CAN communication circuit is connected with a storage short section of the logging instrument, and the second FPGA processor is connected with the second signal generating unit and the second signal receiving unit.
In this embodiment, the first signal generating unit includes a first driving circuit, a first low-pass filter circuit, a first modulation circuit, a first adjusting circuit, and a first power amplifying circuit, which are connected in sequence, where the first driving circuit and the first modulation circuit are connected to the first FPGA processor, and the first power amplifying circuit is connected to the first transmission coil;
the second signal generating unit comprises a second driving circuit, a second low-pass filter circuit, a second modulation circuit, a second adjusting circuit and a second power amplifying circuit which are sequentially connected, wherein the second driving circuit and the second modulation circuit are connected with the second FPGA processor, and the second power amplifying circuit is connected with the second transmission coil.
In this embodiment, the first signal receiving unit includes a first pre-amplifier circuit, a first filter circuit, and a first demodulator circuit, which are connected in sequence, where the first pre-amplifier circuit is connected to the first transmission coil, and the first demodulator circuit is connected to the first FPGA processor;
the second signal receiving unit comprises a second preceding stage amplifying circuit, a second filter circuit and a second demodulation circuit which are connected in sequence, wherein the second preceding stage amplifying circuit is connected with the second transmission coil, and the second demodulation circuit is connected with the second FPGA processor.
Because the ground system sends data to the logging instrument and the logging instrument is the same to ground system send data process, and data processing method is the same, consequently, the utility model discloses go up wireless nipple joint and wireless nipple joint down and adopt the structure to follow the circuit that the function is the same in the design.
Example two
The utility model also provides a cross drill logging instrument cable head wireless transmission method, including step S1 ~ S5. The data transmission process is described in detail below with reference to the accompanying drawings. Please refer to fig. 3 and 4, fig. 3 is a data processing flow chart of the information transmission from the ground line system to the logging tool provided by the embodiment of the present invention, and fig. 4 is a data transmission path diagram of the cable head wireless transmission device of the over-drill logging tool provided by the embodiment of the present invention.
S1: the ground system sends a ground signal to the upper wireless short section through a remote transmission circuit;
when the cable head 3 in fig. 2 reaches the position of the fishing head 5 of the drill logging unit, data transmission is started. The ground system transmits information to the telemetry circuit through the logging cable, and the telemetry circuit 6 in the cable head transmits the received ground control instruction and instrument parameters to the upper wireless short joint 1 through the first CAN communication circuit bus.
S2: the upper wireless short section receives and processes the ground signal to obtain a first magnetic signal, and sends the first magnetic signal to the lower wireless short section;
and a first MCU processor on a first control unit in the upper wireless short joint 1 sends the received data to a first FPGA processor. The first FPGA processor generates two lines of square wave signals with different frequencies, drives and shapes the square wave signals through the first driving circuit, and then enters the first low-pass filter circuit to process the square wave signals into sine wave signals required by carrier waves.
The sine wave signal is modulated by a first modulation circuit and processed by the amplitude of a first adjusting circuit by utilizing a ground signal received by a first FPGA processor, and then is amplified by a first power amplifying circuit to obtain a first amplified signal;
the first amplified signal is output to the first transmission coil 11, and the first transmission coil converts the second signal into a first magnetic signal and transmits the first magnetic signal to the lower wireless short joint 2.
S3: the lower wireless short joint receives and processes the first magnetic signal to obtain a second electric signal, and the second electric signal is sent to a logging instrument;
and after receiving the first magnetic signal, the second transmission coil 21 of the lower wireless short joint 2 converts the first magnetic signal into a first electric signal to obtain a third signal. The electric signal is amplified by a second pre-stage amplifying circuit and then is transmitted to a second filter circuit for filtering processing to obtain a first filter signal. The second filter circuit filters useless signals outside the carrier frequency, the first filter signals are sent to an envelope detection circuit, namely a second demodulation circuit, for decoding processing, finally the decoded signals are sent to a second FPGA processor for data extraction to obtain second electric signals, the second FPGA processor sends the extracted data, namely the second electric signals, to a second MCU processor, and the second MCU processor sends commands and configuration parameters to the logging instrument 4 through a second CAN bus for storage short circuit and instrument control and parameter configuration.
S4: the logging instrument configures each underground short section according to the first electric signal and sends logging data to the lower wireless short section;
s5: the lower wireless short section receives and processes logging data to obtain a second magnetic signal, and the second magnetic signal is sent to the upper wireless short section;
s6: and the upper wireless short section receives and processes the second magnetic signal to obtain a third electric signal, and the third electric signal is sent to the ground system through the telemetry circuit.
After receiving the command from the telemetry circuit 6, the logging instrument 4 sends logging data in a storage short section on the logging instrument to the lower wireless short section 2 through a CAN bus, the lower wireless short section 2 modulates the data and then transmits the data through a second transmission coil, the upper wireless short section 1 decodes the received signal through a first transmission coil 11 and then sends the signal to the telemetry circuit 6, and finally the signal is sent to a ground logging system through a logging cable 7 to be processed. The process is that the logging instrument uploads data to the ground system, which is the same as the data processing flow of the ground line system transmitting information to the logging instrument, and is not described herein again.
The utility model provides a pair of cross drill head logging instrument cable head wireless transmission device and method are through unique structural design and data processing mode for received signal intensity is high, handles simply, and it is complicated to have solved conventional wireless short transmission system send-receiver device in the pit, transmission signal easily receives the problem of complicated environmental disturbance in the pit, has realized the transmission that cross drill head logging instrument and cable head data are quick, accurate.
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 (6)
1. The utility model provides an over-drill logging instrument cable head wireless transmission device which characterized in that includes:
an upper wireless short joint (1) arranged in the cable head and a lower wireless short joint (2) arranged in the logging instrument fishing head;
the upper wireless short joint (1) comprises a first transmission coil (11), and the lower wireless short joint (2) comprises a second transmission coil (21).
2. The wireless transmission device for the cable head of the over-the-bit logging instrument according to claim 1, wherein the first transmission coil (11) comprises a first lapping group and a coil outer cylinder, the first lapping group is wound on the coil outer cylinder, and the coil outer cylinder is connected with the cable head through threads;
the second transmission coil (21) comprises a second wrapping group and a coil inner barrel, the second wrapping group is wound on the coil inner barrel, and the coil inner barrel is connected with the fishing head of the logging instrument through threads.
3. The wireless transmission device of cable head of the over-the-bit logging instrument according to claim 2, wherein the upper wireless sub (1) further comprises: the device comprises a first control unit, a first signal generation unit and a first signal receiving unit, wherein the first control unit is respectively connected with the first signal generation unit and the first signal receiving unit;
the lower wireless short joint (2) further comprises: the device comprises a second control unit, a second signal generating unit and a second signal receiving unit, wherein the second control unit is respectively connected with the second signal generating unit and the second signal receiving unit.
4. The wireless transmission device for the cable head of the over-the-bit logging instrument according to claim 3, wherein the first control unit comprises a first CAN communication circuit, a first MCU processor and a first FPGA processor which are connected in sequence; the first CAN communication circuit is connected with a remote transmission circuit in the cable head, and the first FPGA processor is connected with the first signal generating unit and the first signal receiving unit;
the second control unit comprises a second CAN communication circuit, a second MCU processor and a second FPGA processor which are connected in sequence; the second CAN communication circuit is connected with a storage short section of the logging instrument, and the second FPGA processor is connected with the second signal generating unit and the second signal receiving unit.
5. The wireless transmission device for the cable head of the over-the-bit logging instrument according to claim 4, wherein the first signal generating unit comprises a first driving circuit, a first low-pass filter circuit, a first modulation circuit, a first adjusting circuit and a first power amplifying circuit which are connected in sequence, wherein the first driving circuit and the first modulation circuit are connected with the first FPGA processor, and the first power amplifying circuit is connected with the first transmission coil;
the second signal generating unit comprises a second driving circuit, a second low-pass filter circuit, a second modulation circuit, a second adjusting circuit and a second power amplifying circuit which are sequentially connected, wherein the second driving circuit and the second modulation circuit are connected with the second FPGA processor, and the second power amplifying circuit is connected with the second transmission coil.
6. The wireless transmission device for the cable head of the over-the-bit logging instrument according to claim 5, wherein the first signal receiving unit comprises a first pre-amplifier circuit, a first filter circuit and a first demodulator circuit which are connected in sequence, wherein the first pre-amplifier circuit is connected with the first transmission coil, and the first demodulator circuit is connected with the first FPGA processor;
the second signal receiving unit comprises a second preceding stage amplifying circuit, a second filter circuit and a second demodulation circuit which are connected in sequence, wherein the second preceding stage amplifying circuit is connected with the second transmission coil, and the second demodulation circuit is connected with the second FPGA processor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920892879.3U CN210460635U (en) | 2019-06-13 | 2019-06-13 | Wireless transmission device for cable head of over-drill logging instrument |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920892879.3U CN210460635U (en) | 2019-06-13 | 2019-06-13 | Wireless transmission device for cable head of over-drill logging instrument |
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| CN210460635U true CN210460635U (en) | 2020-05-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110306973A (en) * | 2019-06-13 | 2019-10-08 | 西安思坦仪器股份有限公司 | It is a kind of to cross drill bit logging instrument end radio transmitting device and method |
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2019
- 2019-06-13 CN CN201920892879.3U patent/CN210460635U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110306973A (en) * | 2019-06-13 | 2019-10-08 | 西安思坦仪器股份有限公司 | It is a kind of to cross drill bit logging instrument end radio transmitting device and method |
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