CN101976364A - Oil well data exchange system - Google Patents
Oil well data exchange system Download PDFInfo
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- CN101976364A CN101976364A CN2010105134150A CN201010513415A CN101976364A CN 101976364 A CN101976364 A CN 101976364A CN 2010105134150 A CN2010105134150 A CN 2010105134150A CN 201010513415 A CN201010513415 A CN 201010513415A CN 101976364 A CN101976364 A CN 101976364A
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Abstract
The invention discloses an oil well data exchange system for realizing data transmission between a ground operating platform and an underground device. The system comprises a ground reader-writer, a low-frequency RFID (radio frequency identification) tag and an underground data processing subsystem. The underground data processing subsystem comprises an antenna arranged on an oil well pipeline, a read-write module and a common memory. The ground reader-writer writes data into the low-frequency RFID tag, the read-write module reads the data in the low-frequency RFID tag and the data are stored in the common memory; and if the read-write module is judged to download the tag, the data information in the tag is sent to the underground device; and if the read-write module is judged to upload the tag, the data stored in the common memory by the underground device are written into the low-frequency RFID tag, and the ground reader-writer reads the data. The system realizes bidirectional data transmission above and below the well by using the low-frequency RFID tag as a medium, plays a role in buffering the data through the common memory, and does not need to distribute or acquire the data for the underground device at the same time of reading/writing the tag so as to shorten the data reading/writing time and improve the reliability.
Description
Technical field
The invention belongs to a kind of system that can make downhole hardware and the mutual swap data of aboveground platform, particularly a kind of well data exchange system based on the RFID technology.
Background technology
Oil drilling platform is a technical barrier in the oil drilling to the data transmission of downhole hardware or control always.Because the particular surroundings of down-hole, as salt solution, surpass 120 ℃ high temperature, the pressure of tens Mpa, general radio device can't operate as normal, and cable laying or hydraulic line cost are then very high, implement also relatively difficulty.Traditional mature methods generally is to use mechanical triggering mode, comes the valve of down-hole etc. is controlled by throwing mechanical hook-up that Metal Ball triggers the down-hole; Perhaps the means by delayed start-up are started working the device of down-hole voluntarily.Other method is the United States Patent (USP) of US 2009/0044937 as publication number, and the mode by aboveground platform output hydraulic impulse is sent to the down-hole with aboveground simple command.Though these controls or data transmission method be the device under the control well effectively, information flow all is unidirectional, can't realize that downhole hardware arrives the information feedback of aboveground platform.In the time need monitoring, only after reclaim the down-hole, downhole hardware taken apart just and can obtain these Monitoring Data at pipeline to the environment of down-hole or status of equipment; Then need afterwards to seal again and continue again to use.
RFID (Radio Frequency Identification, radio frequency identification) is that a kind of transport property of utilizing the space coupling of radiofrequency signal or reflecting is discerned the data in the RFID label, to reach the object purpose of identification automatically.General rfid system comprises RFID label and read write line, and the data transmission between label and the read write line has the characteristics of contactless and anti-environmental interference.Application for subsurface environment, the low frequency carrier signal of hundreds of KHz, for example the exemplary operation frequency is the low frequency rfid system of 125khz or 134khz is not subjected to saltwater environment basically in the process of short-range communication influence, and the influence of its communication process of metal pair is also more limited on every side, can deal with the down-hole rugged surroundings easily.
U.S. Pat 7063148 discloses a kind of device that comes the control well lower valve by RFID (radio-frequency (RF) identification) label, by an additional reader and antenna on the valve of down-hole, in the time of near the RFID label passes through valve, reader can be read the data in the RFID label, comes by-pass valve control by these data.But its data stream still can only be 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 that also has environmental parameters such as some monitoring downhole temperatures, pressure, the latter is bigger for the demand of data passback, can satisfy the real-time monitoring of subsurface environment to a certain extent like this, so that make decision-making more efficiently.
Summary of the invention
The invention provides a kind of well data exchange system, can realize the bidirectional data transfers between aboveground platform and the some downhole hardwares.
A kind of well data exchange system comprises aboveground read write line, low frequency RF ID label and downhole data processing subsystem,
Described aboveground read write line carries out read or write to the data in the described low frequency RF ID label;
Described downhole data processing subsystem comprises antenna, module for reading and writing and common memory, described module for reading and writing is by antenna emission or received RF signal, data in the described low frequency RF ID label are carried out read or write, downhole hardware all is connected described common memory with described module for reading and writing, in order to read or write the data in the described common memory.
As preferred embodiment, described module for reading and writing comprises to first signal output of 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 the interruption input port, and the secondary signal delivery outlet of described module for reading and writing extends an interrupt control line, and described interrupt control line is electrically connected with the described interruption input port 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 described serial data line and described clock line composition data bus by a serial data line and a clock lines respectively.
As preferred embodiment, be provided with control byte in the data of described low frequency RF ID label, be used for described low frequency RF ID label area is divided into following biography label and uploads label.
Technique effect of the present invention is embodied in: at first realized bidirectional data transfers between aboveground platform and the some downhole hardwares with low frequency RF ID label as intermediary.Secondly, owing to used common memory, at down-transmitting data or upload in the process of data, the data buffering effect that described common memory plays, make and need in read/write tag, not carry out data allocations or data aggregation downhole hardware, can perhaps write the time shortening of data so that from the label reading of data like this, improve the reliability of system to label.Once more, some downhole hardwares use the mode of same data interchange platform, and the system that makes has open-ended characteristic, can increase or reduce the quantity that is connected the downhole hardware above the well data switching plane of the present invention arbitrarily.
Description of drawings
Fig. 1 is the structure diagram of the better embodiment of 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 well data exchange system of the present invention and the storage organization synoptic 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, well data exchange system of the present invention is used to realize the data transmission between some downhole hardwares 100 and the aboveground job platform 200, comprise the read write line 300 that is connected on the aboveground job platform 200, RFID label 400, and downhole data processing subsystem 500.
Described read write line 300 is used for the data of aboveground job platform 200 needs transmission are write label 400, perhaps sense data and be sent to aboveground job platform 200 from label 400.Described downhole data processing subsystem 500 comprises antenna 510, module for reading and writing 520 and the common memory 530 that is installed near the pipeline 150 of downhole hardware.Described antenna 510 is connected on the module for reading and writing 520, and described downhole hardware 100 and module for reading and writing 520 all are connected with common memory 530.Described common memory 530 is used to store the information that these downhole hardwares 100 obtain, the information such as working condition of for example environmental information such as downhole temperature, pressure, and valve, pipeline on the one hand; On the other hand, be used to cushion the down-transmitting data that module for reading and writing 510 obtains from label 400.
Described label 400 is a low frequency RF ID label, and its frequency of operation is tens between hundreds of KHz, and typical frequency of operation is 125 KHz or 134 KHz.Described label 400 is as the intermediary of data transmission,, uses and throws after it writes data at read write line 300, perhaps with modes such as ropes label 400 delivered near the downhole data processing subsystem 500; In short time through downhole data processing subsystem 500, the data in the downhole data processing subsystem 500 readable outgoing label 400 are promptly finished the data down transmission of aboveground job platform 200 to downhole hardware 100 at label 400.Then need to use the method for convenience recovery labels 400 such as rope that label 400 is delivered to the down-hole in the data upload process, again label 400 is reclaimed; For not being special lot of data (tens of to hundreds of bytes), in the short period through downhole data subsystem 500, the data that downhole data subsystem 500 can be finished label 400 write at label 400.Increase the length of the antenna 510 of data subsystem 500, the speed when perhaps reducing label 400 through described antenna 510 can increase the T.T. of data transmission, thereby can increase the data volume of uploading at every turn or passing 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 can be by antenna transmission and received RF signal.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 interruption input port 102.Described module for reading and writing 520 and described downhole hardware 100 can be selected a single-chip microcomputer for use, and realize above-mentioned delivery outlet or input port by the I/O mouth that single-chip microcomputer is set.
Described common memory 530 can be selected EEPROM for use, 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 form 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 is electrically connected with the interruption input port 102 of all downhole hardwares 100 by an interrupt control line INT.
See also Fig. 2 and 3, first byte in label 400 stored spaces is defined as control byte CON1.Set the value of control byte CON1, pass label 410 under label 400 is divided into and upload label 420.If the value of control byte CON1 is set at down label 400 and passes label 410, then corresponding well lower device 100 is provided with some control byte CON2, CON3, CON4 after the control byte CON1.Control byte CON2, CON3 or CON4 the inside comprise two kinds of data: with downhole hardware 100 corresponding equipment numbering, and the start address and the data length that will pass to the data of downhole hardware 100 down.And then promptly store down-transmitting data DATA after control byte CON2, CON3, the CON4 continuously and be used to represent that the EOF of the end of data indicates.By resolving the content of control byte CON2, CON3, CON4, can from down-transmitting data, the data read of each downhole hardware 100 correspondences be come out easily.
If the value of control byte CON1 is set at label 400 and uploads label 420, an initial address mark START and end address sign END then is set after the control byte CON1, be used for selecting the position of the data segment that need from common memory 530, read out.Other embodiment for example uses mode that the data start address the adds data length data segment position in the mark common memory 530 as a token of, then can save the storage space of some labels 400.Space after described start address sign START and the end address sign END is as the storage space of uploading data.
Described control byte CON1 is except being set at down label 400 on biography label 410 or uploading the label 420, can also be by some special positions be set, for example a certain position with CON1 is made as 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.
The data that downhole hardware 100 is gathered and is stored in the 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 continuous space afterwards is downhole hardware 100 stored log data DATA1.The address that end of data tick lables LEOF stores last daily record data DATA1.Daily record data DATA1 can be that unit or frame are unit with the byte, and each piece daily record data DATA1 comprises at least with downhole hardware 100 corresponding equipment and numbers.Space after the daily record data DATA1 can be used for storing down the data that pass label 410, so that downhole hardware 100 reads down-transmitting data from common memory 530.
See also 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 following the biography, then have only downhole hardware 100 execution work programs 611.The working routine 611 of downhole hardware 100 comprises the steps: 1) if need operation common memory 530, the serial data interface of then first inspection chamber lower device 100 and clock interface; 2) confirm do not have signal on the data bus, when promptly data bus is idle, just begin read/write common memory 530.Downhole hardware 100 can be provided with a little data buffer, causes loss of data in the time of can avoiding several downhole hardwares 100 to write data to common memory 530 simultaneously like this.
If the interruption input port 102 of downhole hardware 100 detects the look-at-me that the secondary signal delivery outlet 522 by module for reading and writing 520 sends, 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 memories 530: owing to the read/write operation to common memory 530 may be a unit with byte or frame, before stopping with data bus operations common memory 530, the downhole hardware 100 that is carrying out read/write operation needs to have transmitted current byte or frame;
2) state of monitor signal input port 101: begin monitor signal input port 101 after the downhole hardware 100 shut-down operation common memories 530; If detecting rising edge at signal input 101 then enters step 3,, then enter step 4 if detect negative edge;
3) downhole hardware 100 reads corresponding data in the common memory: at this moment, downhole hardware 100 at first reads the end of data tick lables LEOF of common memory 530, to determine the position of daily record data DATA1, read daily record data DATA1 control byte CON2, CON3 and CON4 afterwards then; Determine position with described downhole hardware 100 corresponding down-transmitting datas 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 finishes, and continues execution work program 611.
See also 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 to throw, perhaps label 400 is delivered near the antenna 510 of downhole data processing subsystem 500 with modes such as ropes;
When three, label 400 was through antennas 510, described module for reading and writing 520 is the control byte CON1 of reading tag 400 at first, resolve and definite label 400 for passing label 420 down, then module for reading and writing 520 beginning data down transmission programs 621 are to finish data down transmission.
Described data down transmission program 621 comprises the steps:
1) all first signal outputs 521 with module for reading and writing 520 are changed 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, thereby makes the data bus free time so that module for reading and writing 520 operation common memories 530;
Whether idle: do not clash in order to guarantee to operate common memory 530 if 3) detecting data bus, check the serial data interface and the clock interface of module for reading and writing 520, if there is not signal then to represent the data bus free time, can operate described common memory, enter next step; Whether otherwise it is idle to continue to detect data bus;
4) data in the reading tag 410, and write common memory 530: in this step, at first to read the end of data tick lables LEOF of common memory 530, to confirm the end address of daily record data DATA1; Control byte CON2, CON3, CON4 in the continuous then reading tag 410, and down-transmitting data DATA are up to running into end of data mark EOF; The data that read are write in the daily record data DATA1 storage space afterwards of common memory 530;
5) successively first signal output 521 corresponding with downhole hardware 100 is changed to high level, make downhole hardware read common memory 530 successively: owing to all first signal outputs 521 of module for reading and writing 520 are changed to low level in the step 2, the signal input 101 of corresponding downhole hardware 100 will detect rising edge in this step, and read corresponding down-transmitting data from common memory 530; In this step, module for reading and writing 520 is in the process of downhole hardware 100 reading of data, the serial data interface and the clock interface that constantly detect described module for reading and writing 520 finish with the process of confirming corresponding downhole hardware 100 reading of data, change the level of first signal output 521 of next downhole hardware 100 correspondences then;
6) first signal output 521 of module for reading and writing 520 is changed to low level: all downhole hardwares 100 read after corresponding down-transmitting data finishes, module for reading and writing 520 is changed to low level with the first all signal outputs 521, downhole hardware 100 will detect negative edge, to withdraw from interrupt handling routine 612;
7) data down transmission program 621 finishes.
See also Fig. 1 to 4, the process of uploading data comprises the steps:
One, described aboveground job platform 200 writes the data of control corresponding byte CON1 by described read write line 300 to label 400, and the data of start address sign START and end address sign END;
Two, with the mode of the described label 200 of convenience such as rope recovery label 400 is delivered to the down-hole, make the antenna 510 of label 400 through downhole data processing subsystems 500;
When three, label 400 passes through the antenna 510 of downhole data processing subsystems 500, the control byte CON1 of described module for reading and writing 520 reading tag 400, resolve and definite label 400 for uploading label 420, described module for reading and writing 520 beginning data upload programs 622, the data that needs are uploaded write the described label 420 of uploading;
Four, with after label 400 recovery, aboveground job platform 200 is finished data upload by the data in read write line 300 reading tag 400.
The data upload program 622 of described module for reading and writing 520 comprises the steps:
1) all first signal outputs 521 with module for reading and writing 520 are changed 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, thereby makes the data bus free time so that module for reading and writing 520 operation common memories 530;
Whether idle: not clash in order guaranteeing to operate common memory 530, to check the serial data interface and the clock interface of module for reading and writing 520, if there is not signal then to represent the data bus free time, enter next step if 3) detecting data bus; Whether otherwise it is idle to continue to detect data bus;
4) read data in the common memory 530 and write label: module for reading and writing 520 reads control byte CON1, start address sign START and the end address sign END that uploads label 420 earlier, according to described start address sign START and end address sign END reading of data and write and upload label 420 from common memory 530; If the data that parse also need common memory 530 is carried out other operation, then carry out corresponding operation from control byte CON1;
5) first signal output 521 of module for reading and writing 520 is changed to low level: module for reading and writing 520 is changed to low level with the first all signal outputs 521, and downhole hardware 100 will detect negative edge, to withdraw from interrupt handling routine 612;
6) data upload program 622 finishes.
Owing to used common memory 530, at down-transmitting data or upload in the process of data, the data buffering effect that described common memory 530 plays, make and need in read/write tag 400, not carry out data allocations or data aggregation downhole hardware 100, like this can be so that from label 400 reading of data, perhaps write the time shortening of data, improve the reliability of system to label 400.The circuit form of similar bus also makes system have certain extended capability.
See also 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 one first signal output 521 '.The serial data interface and the clock interface of described module for reading and writing 520, common memory 530 and described downhole hardware 100 are electrically connected by serial data line SDA and clock line SCL respectively.Described serial data line SDA and clock line SCL form data bus jointly.First signal output 521 ' of described module for reading and writing 520 is electrically connected by a lead 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 is electrically connected with the interruption input port 102 of all downhole hardwares 100 by an interrupt control line INT.
Lead 700, interrupt control line INT and data bus connect into the form of bus with described module for reading and writing 520, common memory 530 and downhole hardware 100, are convenient to connect in downhole data processing subsystem 500 more downhole hardware 100 like this.But such circuit also has some shortcomings, be that module for reading and writing 520 passes through first signal output 521 ' when the signal input 101 of a certain downhole hardware 100 sends signals, need send specific order on bus, each downhole hardware 100 all needs to resolve these orders to determine signal is issued which downhole hardware 100; Can increase the complexity and the expense of electric energy and time of system like this.
Claims (5)
1. the well data exchange system comprises aboveground read write line, low frequency RF ID label and downhole data processing subsystem,
Described aboveground read write line carries out read or write to the data in the described low frequency RF ID label;
Described downhole data processing subsystem comprises antenna, module for reading and writing and common memory, described module for reading and writing is by antenna emission or received RF signal, data in the described low frequency RF ID label are carried out read or write, downhole hardware all is connected described common memory with described module for reading and writing, in order to read or write the data in the described common memory.
2. well data exchange system according to claim 1 is characterized in that, described module for reading and writing comprises to first signal output of downhole hardware transmission level signal and sends the secondary signal delivery outlet of look-at-me to described downhole hardware.
3. well data exchange system according to claim 2, it is characterized in that, downhole hardware comprises the interruption input port, and the secondary signal delivery outlet of described module for reading and writing extends an interrupt control line, and described interrupt control line is electrically connected with the described interruption input port of downhole hardware.
4. according to claim 1 or 2 or 3 described well data exchange systems, it is characterized in that, 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 described serial data line and described clock line composition data bus by a serial data line and a clock lines respectively.
5. according to claim 1 or 2 or 3 described well data exchange systems, it is characterized in that, be provided with control byte in the data of described low frequency RF ID label, be used for described low frequency RF ID label area is divided into following biography label and uploads label.
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| CN102841546A (en) * | 2011-06-24 | 2012-12-26 | 中国石油化工股份有限公司 | Underground control system, control method and application of underground control system and control method |
| CN102839952A (en) * | 2011-06-24 | 2012-12-26 | 中国石油化工股份有限公司 | Device and method for data transmission during underground integrated communication |
| 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 |
| 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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| CN101976364B (en) | 2016-04-20 |
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