CN101976364B - Oil well data exchange system - Google Patents
Oil well data exchange system Download PDFInfo
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- CN101976364B CN101976364B CN201010513415.0A CN201010513415A CN101976364B CN 101976364 B CN101976364 B CN 101976364B CN 201010513415 A CN201010513415 A CN 201010513415A CN 101976364 B CN101976364 B CN 101976364B
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Abstract
A kind of oil well data exchange system, for realizing the data transmission between aboveground job platform and downhole hardware, comprises aboveground read write line, low frequency RFID tag and downhole data processing subsystem.Downhole data processing subsystem comprises the antenna be arranged on oil country tubular good, module for reading and writing and common memory.Aboveground read write line writes data to low frequency RFID tag, and the deposit data in module for reading and writing reading low frequency RFID tag is in common memory; Module for reading and writing judgement passes label under being, then the data message in label is sent to downhole hardware, label is uploaded in judgement, then downhole hardware is deposited in the data write low frequency RFID tag of common memory, aboveground read write line reads this data.The present invention achieves the bidirectional data transfers between underground using low frequency RFID tag as intermediary, data buffering effect is played by common memory, make not need to carry out data distribution or collection to downhole hardware while read/write tag, shorten the time read and write data, improve the reliability of system.
Description
Technical field
The invention belongs to a kind of system that downhole hardware and aboveground platform can be made mutually to exchange data, particularly a kind of oil well data exchange system based on RFID technique.
Background technology
Oil drilling platform transmits to the data of downhole hardware or controls to be the technical barrier in oil drilling always.Due to the particular surroundings of down-hole, as the pressure of salt solution, high temperature more than 120 DEG C, tens Mpa, general radio device cannot normally work, and cable laying or hydraulic line cost are then very high, implements also more difficult.The method of traditional comparative maturity is generally use mechanical triggering mode, and the valve etc. of mechanical hook-up to down-hole triggering down-hole by throwing Metal Ball controls; Or by the means of delayed start-up, the device of down-hole is started working voluntarily.Other method, if publication number is the United States Patent (USP) of US2009/0044937, by the mode of aboveground platform output hydraulic pressure pulse, is sent to down-hole by aboveground simple command.Although these control or data transmission method can device effectively under control well, information flow is all unidirectional, cannot realize the information feed back of downhole hardware to aboveground platform.When needing to monitor the environment of down-hole or status of equipment, only just these Monitoring Data can be obtained at pipeline from being taken apart by downhole hardware after down-hole is reclaimed; Then need to re-start sealing afterwards to continue again to use.
RFID (RadioFrequencyIdentification, radio frequency identification) be a kind of Space Coupling of radiofrequency signal or transport property of reflection of utilizing to identify the data in RFID label tag, to reach the object that object identifies automatically.General rfid system comprises RFID label tag and read write line, and the data transmission between label and read write line has feature that is contactless and environment resistant interference.For the application of subsurface environment, the low frequency carrier signal of hundreds of KHz, such as typical operating frequency be the low frequency RFID systems of 125khz or 134khz in the process of short-range communication substantially not by the impact of saltwater environment, and surrounding metal is also more limited on the impact of its communication process, down-hole rugged surroundings can be dealt with easily.
US Patent No. 7063148 discloses a kind of device being carried out control well lower valve by RFID (radio-frequency (RF) identification) label, by a reader additional on the valve of down-hole and antenna, when RFID label tag is passed through near valve time, reader can read the data in RFID label tag, carrys out by-pass valve control by these data.But its data stream can only be still unidirectional, does not consider the passback of downhole data or the problem of feedback; And downhole hardware not only comprises valve, the general sensing equipment also having some environmental parameters such as monitoring downhole temperature, pressure etc., the latter is larger for the demand of data back, can meet the Real-Time Monitoring of subsurface environment so to a certain extent, to make decision-making more efficiently.
Summary of the invention
The invention provides a kind of oil well data exchange system, the bidirectional data transfers between aboveground platform and some downhole hardwares can be realized.
A kind of oil well data exchange system, comprises aboveground read write line, low frequency RFID tag and downhole data processing subsystem,
Described aboveground read write line carries out read or write to the data in described low frequency RFID tag;
Described downhole data processing subsystem comprises antenna, module for reading and writing and common memory, described module for reading and writing is by antenna transmission or received RF signal, read or write is carried out to the data in described low frequency RFID tag, downhole hardware is all connected described common memory with described module for reading and writing, in order to read or write the data in described common memory.
As preferred embodiment, described module for reading and writing comprises the first signal output to downhole hardware transmission level signal, and sends the secondary signal delivery outlet of look-at-me to described downhole hardware.
As preferred embodiment, downhole hardware comprises interrupting input mouth, and the secondary signal delivery outlet of described module for reading and writing extends one and interrupts control line, and described interruption control line is electrically connected with the described interrupting input mouth of downhole hardware.
As preferred embodiment, described module for reading and writing, common memory and downhole hardware include serial datum interface and a clock interface, these serial data interfaces and clock interface are electrically connected by a serial data line and a clock lines respectively, described serial data line and described clock line composition data bus.
As preferred embodiment, in the data of described low frequency RFID tag, be provided with control byte, pass label for described low frequency RFID tag is divided into down and upload label.
Technique effect of the present invention is embodied in: first achieve the bidirectional data transfers between aboveground platform and some downhole hardwares using low frequency RFID tag as intermediary.Secondly, owing to employing common memory, in the process of down-transmitting data or uploading data, the data buffering effect that described common memory plays, make not need to carry out data distribution or Data Collection to downhole hardware while read/write tag, can make from tag reader data like this, or write the time shorten of data to label, improve the reliability of system.Again, some downhole hardwares use the mode of same data interchange platform, make system have open-ended characteristic, can increase arbitrarily or reduce the quantity of the downhole hardware be connected to above well data switching plane of the present invention.
Accompanying drawing explanation
Fig. 1 is the structure diagram of the better embodiment of oil well data exchange system of the present invention;
Fig. 2 is the electrical schematic diagram of the embodiment of downhole data processing subsystem of the present invention;
Fig. 3 is the label of oil well data exchange system of the present invention and the storage organization schematic diagram of common memory;
Fig. 4 is the workflow diagram of the embodiment of downhole data processing subsystem of the present invention;
Fig. 5 is the circuit structure sketch of another embodiment of downhole data processing subsystem of the present invention.
Embodiment
As shown in Figure 1, oil well data exchange system of the present invention is for realizing the data transmission between some downhole hardwares 100 and aboveground job platform 200, comprise the read write line 300 be connected on aboveground job platform 200, RFID label tag 400, and downhole data processing subsystem 500.
Described read write line 300 for aboveground job platform 200 being needed the data write label 400 transmitted, or from label 400 sense data be sent to aboveground job platform 200.Described downhole data processing subsystem 500 comprises antenna 510, module for reading and writing 520 and common memory 530 on the pipeline 150 that is arranged near downhole hardware.Described antenna 510 is connected on module for reading and writing 520, and described downhole hardware 100 and module for reading and writing 520 are all connected with common memory 530.The information that described common memory 530 1 aspect obtains for storing these downhole hardwares 100, the information such as the working condition of the such as environmental information such as downhole temperature, pressure, and valve, pipeline; On the other hand, for cushioning the down-transmitting data that module for reading and writing 510 obtains from label 400.
Described label 400 is low frequency RFID tag, and its frequency of operation is that between tens to hundreds of KHz, typical frequency of operation is 125 KHz or 134 KHz.The intermediary that described label 400 transmits as data, after read write line 300 writes data to it, uses and throws, or deliver near downhole data processing subsystem 500 by modes such as ropes by label 400; At label 400 within the short time of downhole data processing subsystem 500, the data in the readable outgoing label 400 of downhole data processing subsystem 500, namely on completed well, job platform 200 arrives the data down transmission of downhole hardware 100.Then need in data upload process to use the convenient methods reclaiming label 400 such as rope label 400 to be delivered to down-hole, then label 400 is reclaimed; For not being data (tens of to hundreds of byte) a large amount of especially, at label 400 within the short period of downhole data subsystem 500, downhole data subsystem 500 can complete and write the data of label 400.Increase the length of the antenna 510 of data subsystem 500, or reduce the speed of label 400 when described antenna 510, the T.T. of data transmission can be increased, thus can increase the data volume uploaded at every turn or pass down.
As shown in Figure 2, antenna 510 two ends are electrically connected with module for reading and writing 520, and described module for reading and writing 520 sends and received RF signal by antenna.Described module for reading and writing 520 comprises some first signal outputs 521 and a secondary signal delivery outlet 522; Downhole hardware 100 comprises a signal input 101 and an interrupting input mouth 102.Described module for reading and writing 520 and described downhole hardware 100 can select a single-chip microcomputer, and realize above-mentioned delivery outlet or input port by the I/O mouth arranging single-chip microcomputer.
Described common memory 530 can select EEPROM, described module for reading and writing 520, common memory 530 and described downhole hardware 100 include serial datum interface and a clock interface, and these serial data interfaces and clock interface are electrically connected by serial data line SDA and clock line SCL respectively.Described serial data line SDA and clock line SCL forms data bus jointly.First signal output 521 of described module for reading and writing 520 is electrically connected with the signal input 101 of described downhole hardware 100 respectively.The secondary signal delivery outlet 522 of described module for reading and writing 520, interrupts control line INT by one and is electrically connected with the interrupting input mouth 102 of all downhole hardwares 100.
Refer to Fig. 2 and 3, the first character of label 400 memory space joint is defined as control byte CON1.The value of setup control byte CON1, is divided into label 400 and passes down label 410 and upload label 420.If label 400 is set as down passing label 410 by the value of control byte CON1, then after control byte CON1, corresponding well lower device 100 arranges some control byte CON2, CON3, CON4.Comprise two kinds of data inside control byte CON2, CON3 or CON4: the device numbering corresponding with downhole hardware 100, and start address and the data length of the data of downhole hardware 100 will be passed to down.And then after control byte CON2, CON3, CON4, namely Coutinuous store down-transmitting data DATA and the EOF for representing the end of data indicates.By resolve control byte CON2, CON3, CON4 content, can easily from down-transmitting data by the digital independent of each downhole hardware 100 correspondence out.
If label 400 is set as uploading label 420 by the value of control byte CON1, then an initial address mark START and end address mark END is set after control byte CON1, is used for the position of data segment selecting to need to read out from common memory 530.Other embodiment, the mode that such as usage data start address adds data length to mark the data segment location in common memory 530, then can save the storage space of some labels 400 as mark.Space after described start address mark START and end address mark END is as the storage space of uploading data.
Described control byte CON1 passes label 410 except being set as down by label 400 or uploading except label 420, can also by arranging some special positions, such as a certain position of CON1 is set to all daily record datas that common memory 530 is read in 1 expression, and discharges the daily record data storage space of common memory 530.
Downhole hardware 100 to be gathered and the data be stored in common memory 530 are called daily record data.The first byte of common memory 530 is defined as end of data tick lables LEOF, and one section of continuous space is afterwards the daily record data DATA1 that downhole hardware 100 stores.End of data tick lables LEOF stores the address of last daily record data DATA1.Daily record data DATA1 can in units of byte or in units of frame, and each block daily record data DATA1 at least comprises the device numbering corresponding with downhole hardware 100.Space after daily record data DATA1 may be used for storing down the data passed in label 410, so that downhole hardware 100 reads down-transmitting data from common memory 530.
Refer to Fig. 2 to 4, the workflow of whole downhole data processing subsystem 500 comprises the working routine 611 of downhole hardware 100, the interrupt handling routine 612 of downhole hardware 100, the data down transmission program 621 of module for reading and writing 520, the data upload program 622 of module for reading and writing 520.
If do not have data upload or under pass, then only have downhole hardware 100 to perform working routine 611.The working routine 611 of downhole hardware 100 comprises the steps: 1) if desired operate common memory 530, then the serial data interface of first inspection chamber lower device 100 and clock interface; 2) confirm that data bus does not have signal, when namely data bus is idle, just start read/write common memory 530.Downhole hardware 100 can arrange a little data buffer, and several downhole hardware 100 can be avoided like this to need to cause loss of data when writing data to common memory 530 simultaneously.
If the interrupting input mouth 102 of downhole hardware 100 detects the look-at-me sent by the secondary signal delivery outlet 522 of module for reading and writing 520, then enter interrupt handling routine 612.The interrupt handling routine 612 of downhole hardware 100 comprises the steps:
1) downhole hardware 100 shut-down operation common memory 530: due to may in units of byte or frame to the read/write operation of common memory 530, before stopping is with data bus operations common memory 530, the downhole hardware 100 carrying out read/write operation needs to transfer current byte or frame;
2) state of monitor signal input port 101: start monitor signal input port 101 after downhole hardware 100 shut-down operation common memory 530; If rising edge detected at signal input 101, enter step 3, if negative edge detected, then enter step 4;
3) downhole hardware 100 reads corresponding data in common memory: now, first downhole hardware 100 reads the end of data tick lables LEOF of common memory 530, to determine the position of daily record data DATA1, then read control byte CON2, CON3 and CON4 after daily record data DATA1; Determine the position of the down-transmitting data corresponding with described downhole hardware 100 by resolving control byte CON2, CON3 and CON4, and read the data corresponding with described downhole hardware 100;
4) if downhole hardware 100 detects negative edge, then interrupt routine 612 terminates, and continues to perform working routine 611.
Refer to Fig. 1 to 4, the process of down-transmitting data comprises the steps:
One, described aboveground job platform 200 writes control byte and down-transmitting data by described read write line 300 to label 400;
Two, use and throw, or near the antenna 510 by modes such as ropes label 400 being delivered to downhole data processing subsystem 500;
Three, label 400 is when antenna 510, the control byte CON1 of described module for reading and writing 520 first reading tag 400, and carry out resolving and determine that label 400 is for passing label 420 down, then module for reading and writing 520 starts data down transmission program 621 to complete data down transmission.
Described data down transmission program 621 comprises the steps:
1) all first signal outputs 521 of module for reading and writing 520 are set to low level;
2) send look-at-me: module for reading and writing 520 sends look-at-me by secondary signal delivery outlet 522, allows all downhole hardwares 100 enter interrupt handling routine 612, thus make data bus idle so that module for reading and writing 520 operates common memory 530;
3) whether idlely data bus is detected: in order to not clash when ensureing operation common memory 530, check serial data interface and the clock interface of module for reading and writing 520, if there is no signal, represent that data bus is idle, can operate described common memory, enter next step; Otherwise whether continue to detect data bus idle;
4) data in reading tag 410, and write common memory 530: in this step, first to read the end of data tick lables LEOF of common memory 530, to confirm the end address of daily record data DATA1; Then the control byte CON2 in continuous reading tag 410, CON3, CON4, and down-transmitting data DATA, until run into end of data mark EOF; The data read are write in the storage space after the daily record data DATA1 of common memory 530;
5) successively first signal output 521 corresponding with downhole hardware 100 is set to high level, downhole hardware is made to read common memory 530 successively: owing to all first signal outputs 521 of module for reading and writing 520 being set to low level in step 2, the signal input 101 of downhole hardware 100 corresponding in this step will detect rising edge, and read corresponding down-transmitting data from common memory 530; In this step, module for reading and writing 520 reads in the process of data at downhole hardware 100, the serial data interface of the described module for reading and writing 520 of continuous detection and clock interface terminate with the process confirming corresponding downhole hardware 100 and read data, then change the level of the first signal output 521 of next downhole hardware 100 correspondence;
6) the first signal output 521 of module for reading and writing 520 is set to low level: all downhole hardwares 100 read corresponding down-transmitting data complete after, the first all signal outputs 521 is set to low level by module for reading and writing 520, downhole hardware 100 will detect negative edge, to exit interrupt handling routine 612;
7) data down transmission program 621 terminates.
Refer to Fig. 1 to 4, the process of uploading data comprises the steps:
One, described aboveground job platform 200 writes the data of corresponding control byte CON1 to label 400 by described read write line 300, and the data of start address mark START and end address mark END;
Two, by convenient modes reclaiming described label 200 such as ropes, label 400 is delivered to down-hole, make label 400 through the antenna 510 of downhole data processing subsystem 500;
Three, label 400 is when the antenna 510 of downhole data processing subsystem 500, the control byte CON1 of described module for reading and writing 520 reading tag 400, carry out resolving and determine that label 400 is for uploading label 420, described module for reading and writing 520 starts data upload program 622, described in the data write needing to upload, upload label 420;
Four, after being reclaimed by label 400, aboveground job platform 200, by the data in read write line 300 reading tag 400, completes data upload.
The data upload program 622 of described module for reading and writing 520 comprises the steps:
1) all first signal outputs 521 of module for reading and writing 520 are set to low level;
2) send look-at-me: module for reading and writing 520 sends look-at-me by secondary signal delivery outlet 522, allows all downhole hardwares 100 enter interrupt handling routine 612, thus make data bus idle so that module for reading and writing 520 operates common memory 530;
3) whether idlely detect data bus: in order to not clash when ensureing operation common memory 530, check serial data interface and the clock interface of module for reading and writing 520, if there is no signal, represent that data bus is idle, entering next step; Otherwise whether continue to detect data bus idle;
4) read the data in common memory 530 and write label: module for reading and writing 520 first reads control byte CON1, the start address mark START and end address mark END that upload label 420, from common memory 530, reading data according to described start address mark START and end address mark END and write and upload label 420; If the data parsed from control byte CON1 also need operation common memory 530 being carried out to other, then perform corresponding operation;
5) the first signal output 521 of module for reading and writing 520 is set to low level: the first all signal outputs 521 is set to low level by module for reading and writing 520, and downhole hardware 100 will detect negative edge, to exit interrupt handling routine 612;
6) data upload program 622 terminates.
Owing to employing common memory 530, in the process of down-transmitting data or uploading data, the data buffering effect that described common memory 530 plays, make not need to carry out data distribution or Data Collection to downhole hardware 100 while read/write tag 400, can make like this to read data from label 400, or write the time shorten of data to label 400, improve the reliability of system.The circuit form of similar bus also makes system have certain extended capability.
Refer to Fig. 1 and Fig. 5, another embodiment of downhole data processing subsystem 500 is similar to aforesaid better embodiment, and described module for reading and writing 520 only comprises first signal output 521 '.The serial data interface of described module for reading and writing 520, common memory 530 and described downhole hardware 100 and clock interface, be electrically connected by serial data line SDA and clock line SCL respectively.Described serial data line SDA and clock line SCL forms data bus jointly.First signal output 521 ' of described module for reading and writing 520 is electrically connected by a wire 700 with the signal input 101 of all downhole hardwares 100.The secondary signal delivery outlet 522 of described module for reading and writing 520, interrupts control line INT by one and is electrically connected with the interrupting input mouth 102 of all downhole hardwares 100.
Wire 700, interruption control line INT and data bus, connect into the form of bus, be convenient to like this in downhole data processing subsystem 500, connect more downhole hardware 100 by described module for reading and writing 520, common memory 530 and downhole hardware 100.But such circuit also has some shortcomings, namely when module for reading and writing 520 sends signal by the first signal output 521 ' to the signal input 101 of a certain downhole hardware 100, need in bus, send specific order, each downhole hardware 100 needs to resolve these orders and determines signal issues which downhole hardware 100; Complexity and the expense of electric energy and time of system can be increased like this.
Claims (1)
1. oil well data exchange system, comprises aboveground read write line, low frequency RFID tag and downhole data processing subsystem, and described downhole data processing subsystem comprises antenna, module for reading and writing and common memory on the pipeline that is arranged near downhole hardware;
During data down transmission, described aboveground read write line is used for carrying out write operation to described low frequency RFID tag, re-uses and throws or by rope mode, low frequency RFID tag delivered to down-hole, and described module for reading and writing is used for carrying out read operation by antenna to low frequency RFID tag;
During data upload, use rope mode that low frequency RFID tag is delivered to down-hole, described module for reading and writing is used for carrying out write operation by antenna to low frequency RFID tag, re-using rope mode delivers to aboveground by low frequency RFID tag, described aboveground read write line is used for carrying out read operation to described low frequency RFID tag;
Described module for reading and writing comprises for the first signal output to downhole hardware transmission level signal, and for sending the secondary signal delivery outlet of look-at-me to described downhole hardware;
Described downhole hardware comprises interrupting input mouth, and the secondary signal delivery outlet of described module for reading and writing extends one and interrupts control line, and described interruption control line is electrically connected with the described interrupting input mouth of downhole hardware;
Described module for reading and writing, common memory and downhole hardware include serial datum interface and a clock interface, these serial data interfaces and clock interface are electrically connected by a serial data line and a clock lines respectively, described serial data line and described clock line composition data bus;
Be provided with control byte in the data of described low frequency RFID tag, pass label for described low frequency RFID tag is divided into down and upload label.
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| CN107167175A (en) * | 2017-05-04 | 2017-09-15 | 中国石油集团渤海钻探工程有限公司 | Down-hole pressure based on radio-frequency technique, temperature measurement signal Transmission system and method |
| CN114439469A (en) * | 2020-10-19 | 2022-05-06 | 中国石油化工股份有限公司 | Novel underground bidirectional wireless communication system and method |
| CN112855117A (en) * | 2021-01-14 | 2021-05-28 | 大庆油田有限责任公司 | High-durability and readable-back wireless radio frequency downhole multilayer test pipe column |
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