CN107613412A - A kind of downlink command transmission method of well logging drill collar - Google Patents

A kind of downlink command transmission method of well logging drill collar Download PDF

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Publication number
CN107613412A
CN107613412A CN201710661907.6A CN201710661907A CN107613412A CN 107613412 A CN107613412 A CN 107613412A CN 201710661907 A CN201710661907 A CN 201710661907A CN 107613412 A CN107613412 A CN 107613412A
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pump
downlink command
turn
time
close
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CN107613412B (en
Inventor
代志平
梁耀
陈国兴
李传伟
李安宗
俞蓓
吴天心
杨偲蝉
马丽
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China National Petroleum Corp
China Petroleum Logging Co Ltd
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China National Petroleum Corp
China Petroleum Logging Co Ltd
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Abstract

A kind of downlink command transmission method of well logging drill collar of the present invention, including step 1, establish instruction and issue error model；The pulsewidth that sends instructions under it is determined that T and the error in pulse is issued, error model during instruction issues is obtained according to the error of determination, so that it is determined that the time difference of adjacent turn on pump twice operation；Step 2, the time difference operated according to adjacent turn on pump twice and corresponding downlink command pulsewidth T, formulate corresponding downlink command, and the downhole controller and ground system being respectively written into downhole instrument drill collar；Step 3, needed to adjust downhole instrument working condition according to practice of construction, carry out downlink command and issue；Operated according to downlink command prompting control pump house execution switch pump to present instruction and close pump after terminating；Step 4, according to practice of construction needs, on the basis of the time difference of the adjacent operation of turn on pump twice is met, perform next downlink command and carry out turn on pump, now downhole instrument can produce downlink command command adapted thereto feedback signal indicator and issue success.

Description

A kind of downlink command transmission method of well logging drill collar
Technical field
The present invention relates to the instruction of well logging drill collar transmission, the downlink command transmission of specially a kind of well logging drill collar Method.
Background technology
The downlink command of well logging drill collar refers to that in well logging Ground Engineer passes through ground according to real-time working condition Plane system by regular switch pump, drive rotating disk in a manner of instruction is handed down to downhole instrument, after downhole instrument receives instruction The switching of the Instrument working states such as response transmission rate is realized according to instruction.
, it is necessary to adjust downhole instrument working condition according to real-time drilling handling situations to improve in industry in well logging Operation timeliness.As shown in figure 1, Ground Engineer controls the change of shaft bottom mud flow rate by switching slush pump, downhole instrument Microcontroller receives the change of mud flow rate by sensor, and variable quantity and the instruction in microcontroller memory cell are entered Row contrasts one by one, and downhole instrument realizes the switching of corresponding instruction Instrument working state when such a match occurs.
The mode frequently with switch pump produces pressure signal and realizes that instruction issues at present, because switch pump is manual operation, Switch pump startup error, operating personnel's response error, sensor during not issued to instruction detect threshold error and instruction Each influence factor that operation issues carries out critical-path analysis, and the instruction of design can be influenceed to cause false triggering probability by above-mentioned factor Greatly, drillng operation timeliness is influenceed.Therefore, in operation by operating personnel instruct the response time, each side such as slush pump because Element influences, and it is relatively low that downlink command issues success rate, not only influences to account for the well time but also increases construction risk.
The content of the invention
For problems of the prior art, the present invention provides a kind of downlink command transmission side of well logging drill collar Method, downlink command issue success rate height, and transmission is reliable and stable, and error is small.
The present invention is to be achieved through the following technical solutions：
A kind of downlink command transmission method of well logging drill collar, comprises the following steps,
Step 1, establish instruction and issue error model；The pulsewidth that sends instructions under it is determined that T and the error in pulse is issued, according to The error of determination obtains error model during instruction issues, so that it is determined that the time difference of adjacent turn on pump twice operation；
Step 2, the time difference operated according to adjacent turn on pump twice and corresponding downlink command pulsewidth T, formulate corresponding descending Instruction, and the downhole controller and ground system being respectively written into downhole instrument drill collar；
Step 3, needed to adjust downhole instrument working condition according to practice of construction, carry out downlink command and issue；According to descending Command prompt control pump house perform switch pump operate to present instruction terminate after close pump；
Step 4, according to practice of construction needs, on the basis of the time difference of the adjacent operation of turn on pump twice is met, under execution One downlink command carries out turn on pump, and now downhole instrument can produce downlink command command adapted thereto feedback signal indicator and issue into Work(；Step 2 is repeated to complete to transmit the downlink command of well logging drill collar to four.
Preferably, the step 1 comprises the following steps that；
Step 1.1, determine downlink command pulsewidth T and issue the following error in pulse：
tmPump house is issued to by telecommunication for instruction, pump house starts delay caused by starting slush pump process；
tonDelay caused by being prescribed a time limit for mud pump startup to pressure switch detection door；
t0The time required to turn on pump being detected for pressure switch and issuing turn on pump order；
tm' it is that instruction is issued to pump house by telecommunication, pump house begins to shut off delay caused by slush pump process；
toffPrescribe a time limit caused by delay is closed to pressure switch detection door for slush pump；
t0' detected for pressure switch and close pump and issue the time required to closing pump order；
Step 1.2, each error determined according to step 1.1, obtains the required theoretical Running pump time in n cycle of turn on pump As follows, wherein n is positive integer,
tOpen n=-tm-ton-t0+nT+tm’+toff+t0’；
Step 1.3, each error determined according to step 1.1, obtain closing the required theoretical Running pump time in n cycle of pump As follows, wherein n is positive integer,
tClose n=-tm’-toff-t0’+nT+tm+ton+t0；
Step 1.4, the time of the reception downlink command obtained to step 1.2 and 1.3 parses, and obtains instruction and issued Error model is as follows in journey：
tOpen n+tClose n=2nT+ Δs t；
Wherein, Δ t=│ tm0-tm1│+│ton0-ton1│, for the front and rear adjacent time difference for switching pump operation twice；
So that it is determined that the time difference of the adjacent operation of turn on pump twice.
Further, in step 1.4, the time of step 1.2 and 1.3 reception downlink command is parsed as follows；
Assuming that before and after carrying out during the adjacent pump operation of switch twice,
Turn on pump command error model：tOpen n=-tm0-ton0-t0+nT+tm’+toff+t0', wherein tm0、ton0Respectively opened when secondary Time delays caused by during pump；
Close pump command error model：tClose n=-tm’-toff-t0’+nT+tm1+ton1+t0, wherein tm1、ton1Respectively next time opens Time delays caused by during pump；
Therefore can obtain, tClose n+tClose n=-tm0-ton0-+2nT+tm1+ton1；
It is Δ t to make the adjacent operating time of turn on pump twice difference, then：
Δ t=│ tm0-tm1│+│ton0-ton1│
Therefore, error model is as follows during instruction issues：
tOpen n+tClose n=2nT+ Δs t.
Further, in step 1.2, according to each error of step 1.1 determination, the time that areal receiver-array turn on pump instructs is determined It is as follows：
tOpen=-tm-ton-t0+T+tm’+toff+t0’；
The required theoretical Running pump time for obtaining the n cycle of turn on pump is：
tOpen n=-tm-ton-t0+nT+tm’+toff+t0’。
Further, step 1.3, each error determined according to step 1.1, determine that areal receiver-array closes the time of pump instruction such as Under：
tClose=-tm’-toff-t0’+T+tm+ton+t0；
Obtain close the n cycle of pump required theoretical Running pump time be：
tClose n=-tm’-toff-t0’+nT+tm+ton+t0。
Preferably, in step 3, close after pump continues setting time and perform step 4.
Preferably, in step 3, close after pump continues at least one minute and perform step 4.
Compared with prior art, the present invention has technique effect beneficial below：
A kind of downlink command transmission method of well logging drill collar of the present invention, instruction operation is influenceed by critical-path analysis and issued Each influence factor, propose instruction issue in downlink command error model, error present in downlink command is tired out Meter identification, and the command adapted thereto according to this modelling, so as to reduce false triggering probability, raising disposably issues success rate；Examination Test result and show that this method is reliable and stable, false triggering probability can be reduced, improve drillng operation timeliness.
Brief description of the drawings
Fig. 1 issues flow chart for downlink command in the prior art.
Fig. 2 is the downlink command error model described in present example.
Embodiment
With reference to specific embodiment, the present invention is described in further detail, it is described be explanation of the invention and It is not to limit.
A kind of downlink command transmission method of well logging drill collar of the present invention, comprises the following steps,
Step 1, establish instruction and issue error model；
As shown in Fig. 2 downlink command, which issues pulse, has a series of errors：Wherein, tmPass through for instruction under telecommunication Pump house is sent to, pump house starts delay caused by starting slush pump process, tonPrescribed a time limit for mud pump startup to pressure switch detection door Caused by delay, t0The time required to detecting turn on pump for pressure switch and issuing turn on pump order, T is downlink command pulsewidth, tm' be Instruction is issued to pump house by telecommunication, and pump house begins to shut off delay caused by slush pump process, toffFor slush pump close to Delay caused by pressure switch detection door is prescribed a time limit, t0' detected for pressure switch and close pump and issue the time required to closing pump order.
Therefore areal receiver-array instruction " 1 " is made up of as follows following sections time factor：
1. the delay that pump house starts；
2. pressure switch detects the delay of thresholding turn on pump；
The time required to 3. pressure switch detects turn on pump and issues turn on pump order；
4. the order persistence time；
5. the delay that pump house is closed；
6. the delay of pump thresholding is closed in pressure switch detection；
Close pump 7. pressure switch detects and issue the time required to closing pump order.
Summary and induction is as follows into mathematic(al) representation：
tOpen=-tm-ton-t0+T+tm’+toff+t0’
Similarly, areal receiver-array instruction " 0 " is made up of as follows following sections time factor：
1. the delay that pump house is closed；
2. pressure switch detection thresholding closes the delay of pump；
3. pressure switch detects turn on pump and issued the time required to closing pump order；
4. the order persistence time；
5. the delay of pump house turn on pump；
6. pressure switch detects the delay of turn on pump thresholding；
7. pressure switch detects turn on pump and issued the time required to closing pump order.
It is shown below so as to obtain continuously switching the time shown in pump downlink command pulsewidth T：
tClose n+tClose n=-tm0-ton0-+2nT+tm1+ton1；It is Δ t to make the adjacent operating time of turn on pump twice difference, then：
Δ t=│ tm0-tm1│+│ton0-ton1│
Therefore, error model is as follows during instruction issues：
tOpen n+tClose n=2nT+ Δs t
Therefore, by the equivalent cumulative analysis of error, it is as follows to can obtain conclusion：
Error is only relevant with turn on pump operating time difference twice during instruction issues during instruction issues operation, therefore, base In to should the operation of adjacent turn on pump twice time difference downlink command pulsewidth T, design dependent instruction can effectively reduce lower breaking-out The accumulative influence of various errors in industry, reduce false triggering probability.
Step 2, the time difference operated according to obtained adjacent turn on pump twice and corresponding downlink command pulsewidth T, formulate phase Downlink command is answered, and the downhole controller and ground system being respectively written into downhole instrument drill collar；
Step 3, in site operation, needed to adjust downhole instrument working condition according to practice of construction, carried out under downlink command Hair；Prompt control pump house to perform after switch pump is operated to order fulfillment according to downlink command and close pump one minute；
Step 4, turn on pump, now downhole instrument can produce downlink command command adapted thereto feedback signal indicator and issue into Work(.

Claims (7)

  1. A kind of 1. downlink command transmission method of well logging drill collar, it is characterised in that comprise the following steps,
    Step 1, establish instruction and issue error model；The pulsewidth that sends instructions under it is determined that T and the error in pulse is issued, according to determination Error obtain error model during instruction issues, so that it is determined that adjacent turn on pump twice operation time difference；
    Step 2, the time difference operated according to adjacent turn on pump twice and corresponding downlink command pulsewidth T, formulate corresponding descending finger Order, and the downhole controller and ground system being respectively written into downhole instrument drill collar；
    Step 3, needed to adjust downhole instrument working condition according to practice of construction, carry out downlink command and issue；According to downlink command Prompting control pump house perform switch pump operate to present instruction terminate after close pump；
    Step 4, according to practice of construction needs, on the basis of the time difference of the adjacent operation of turn on pump twice is met, under execution once Row instruction carries out turn on pump, and now downhole instrument can produce downlink command command adapted thereto feedback signal indicator and issue success；Weight Step 2 is performed again to complete to transmit the downlink command of well logging drill collar to four.
  2. A kind of 2. downlink command transmission method of well logging drill collar according to claim 1, it is characterised in that the step Rapid one comprises the following steps that；
    Step 1.1, determine downlink command pulsewidth T and issue the following error in pulse：
    tmPump house is issued to by telecommunication for instruction, pump house starts delay caused by starting slush pump process；
    tonDelay caused by being prescribed a time limit for mud pump startup to pressure switch detection door；
    t0The time required to turn on pump being detected for pressure switch and issuing turn on pump order；
    tm' it is that instruction is issued to pump house by telecommunication, pump house begins to shut off delay caused by slush pump process；
    toffPrescribe a time limit caused by delay is closed to pressure switch detection door for slush pump；
    t0' detected for pressure switch and close pump and issue the time required to closing pump order；
    Step 1.2, each error determined according to step 1.1, obtains the required theoretical Running pump time in n cycle of turn on pump such as Under, wherein n is positive integer,
    tOpen n=-tm-ton-t0+nT+tm’+toff+t0’；
    Step 1.3, each error determined according to step 1.1, the required theoretical Running pump time in pass n cycle of pump is obtained such as Under, wherein n is positive integer,
    tClose n=-tm’-toff-t0’+nT+tm+ton+t0；
    Step 1.4, the time of the reception downlink command obtained to step 1.2 and 1.3 parses, and obtains during instruction issues Error model is as follows：
    tOpen n+tClose n=2nT+ Δs t；
    Wherein, Δ t=│ tm0-tm1│+│ton0-ton1│, for the front and rear adjacent time difference for switching pump operation twice；
    So that it is determined that the time difference of the adjacent operation of turn on pump twice.
  3. A kind of 3. downlink command transmission method of well logging drill collar according to claim 2, it is characterised in that step In 1.4, the time of step 1.2 and 1.3 reception downlink command is parsed as follows；
    Assuming that before and after carrying out during the adjacent pump operation of switch twice,
    Turn on pump command error model：tOpen n=-tm0-ton0-t0+nT+tm’+toff+t0', wherein tm0、ton0Respectively when secondary turn on pump Caused by time delays；
    Close pump command error model：tClose n=-tm’-toff-t0’+nT+tm1+ton1+t0, wherein tm1、ton1Respectively next turn on pump when Caused by time delays；
    Therefore can obtain, tClose n+tClose n=-tm0-ton0-+2nT+tm1+ton1；
    It is Δ t to make the adjacent operating time of turn on pump twice difference, then：
    Δ t=│ tm0-tm1│+│ton0-ton1│
    Therefore, error model is as follows during instruction issues：
    tOpen n+tClose n=2nT+ Δs t.
  4. A kind of 4. downlink command transmission method of well logging drill collar according to claim 2, it is characterised in that step In 1.2, according to each error of step 1.1 determination, determine that the time of areal receiver-array turn on pump instruction is as follows：
    tOpen=-tm-ton-t0+T+tm’+toff+t0’；
    The required theoretical Running pump time for obtaining the n cycle of turn on pump is：
    tOpen n=-tm-ton-t0+nT+tm’+toff+t0’。
  5. A kind of 5. downlink command transmission method of well logging drill collar according to claim 2, it is characterised in that step 1.3, each error determined according to step 1.1, it is as follows to determine that areal receiver-array closes the time that pump instructs：
    tClose=-tm’-toff-t0’+T+tm+ton+t0；
    Obtain close the n cycle of pump required theoretical Running pump time be：
    tClose n=-tm’-toff-t0’+nT+tm+ton+t0。
  6. A kind of 6. downlink command transmission method of well logging drill collar according to claim 1, it is characterised in that step 3 In, close after pump continues setting time and perform step 4.
  7. A kind of 7. downlink command transmission method of well logging drill collar according to claim 1 or 6, it is characterised in that step In rapid three, close after pump continues at least one minute and perform step 4.
CN201710661907.6A 2017-08-04 2017-08-04 Down instruction transmission method for logging-while-drilling drill collar Active CN107613412B (en)

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Publication number Priority date Publication date Assignee Title
CN101105126A (en) * 2007-08-03 2008-01-16 重庆邮电大学 Logging-while-drilling orientation measurement error compensation method based on micro-quartz angular rate sensor
US20090164125A1 (en) * 2007-12-21 2009-06-25 Georgiy Bordakov Method and System to Automatically Correct LWD Depth Measurements
JP2012083890A (en) * 2010-10-08 2012-04-26 Renesas Electronics Corp Method, device and program for calculating error signal pulse width
CN106703789A (en) * 2017-03-16 2017-05-24 中国石油化工股份有限公司 Leakage well drilling fluid level and leakage pressure monitoring system and method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101105126A (en) * 2007-08-03 2008-01-16 重庆邮电大学 Logging-while-drilling orientation measurement error compensation method based on micro-quartz angular rate sensor
US20090164125A1 (en) * 2007-12-21 2009-06-25 Georgiy Bordakov Method and System to Automatically Correct LWD Depth Measurements
JP2012083890A (en) * 2010-10-08 2012-04-26 Renesas Electronics Corp Method, device and program for calculating error signal pulse width
CN106703789A (en) * 2017-03-16 2017-05-24 中国石油化工股份有限公司 Leakage well drilling fluid level and leakage pressure monitoring system and method

Non-Patent Citations (2)

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宗艳波 王磊 柯珂 孙明光: "随钻地层压力测量系统下传指令接收装置研制", 《中国海上油气》 *
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