CN108825214A - Cementing plug positioning system and its localization method - Google Patents
Cementing plug positioning system and its localization method Download PDFInfo
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- CN108825214A CN108825214A CN201710303957.7A CN201710303957A CN108825214A CN 108825214 A CN108825214 A CN 108825214A CN 201710303957 A CN201710303957 A CN 201710303957A CN 108825214 A CN108825214 A CN 108825214A
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000004807 localization Effects 0.000 title claims abstract description 7
- 238000005553 drilling Methods 0.000 claims abstract description 69
- 239000012530 fluid Substances 0.000 claims abstract description 61
- 239000004568 cement Substances 0.000 claims description 14
- 239000002002 slurry Substances 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 12
- 238000013461 design Methods 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 4
- 238000013459 approach Methods 0.000 claims description 3
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 2
- 230000003116 impacting effect Effects 0.000 description 10
- 239000003292 glue Substances 0.000 description 7
- 238000005259 measurement Methods 0.000 description 7
- 238000010276 construction Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 208000034656 Contusions Diseases 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000012937 correction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/09—Locating or determining the position of objects in boreholes or wells, e.g. the position of an extending arm; Identifying the free or blocked portions of pipes
- E21B47/095—Locating or determining the position of objects in boreholes or wells, e.g. the position of an extending arm; Identifying the free or blocked portions of pipes by detecting an acoustic anomalies, e.g. using mud-pressure pulses
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
- E21B33/134—Bridging plugs
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
- E21B47/14—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves
- E21B47/18—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves through the well fluid, e.g. mud pressure pulse telemetry
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Acoustics & Sound (AREA)
- Remote Sensing (AREA)
- Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention proposes a kind of cementing plug positioning system and its localization methods, the system comprises the rubber plug, the first active sonar and the metering devices that are located in tubing string, wherein the first active sonar, which sends sound wave into tubing string and receives, encounters the sound wave of the rubber plug back reflection, and the metering device is according to spread speed in the drilling fluid in the tubing string of the sound wave time difference sent and received and the obtained sound wave to position position of the rubber plug in tubing string.The system can more accurately position position of the rubber plug in tubing string.
Description
Technical field
The present invention relates to oil drillings and cementing technology field, and in particular to a kind of cementing plug positioning system and its positioning
Method.
Background technique
In well cementing process, drilling fluid displacing mud is used.Cement slurry cannot go out pipe shoe, otherwise occur to influence to cement the well for sky
Quality.Meanwhile it cannot there are too long cement plugs to be affected with exempt from customs examination subsequent construction.Therefore, it is necessary to be pumped into drilling fluid
Amount is calculated and is monitored, but irregular, measuring accuracy etc. is influenced by hole diameter, in the actual construction process, it cannot be guaranteed that
It measures exactly accurate.
Currently, common drilling fluid metering method mainly has：
1) tank measures.Height change by the page in computation of mud tank is poor, multiplied by the floor space of slurry tank, theoretically may be used
To learn the drilling fluid total amount being pumped into well.But due to multiple tank switching in cementing operation, string tank easily occurs, leads to tank meter
Amount is inaccurate；
2) flowmeter measures.Flowmeter is installed in pipeline, flowmeter can show real-time flow rate, total flow.But
In well cementing process, floor manager personnel can according to circumstances adjust discharge capacity, cause discharge capacity height to change, the fluctuation of discharge capacity will lead to stream
Meter metering is inaccurate；
3) pump impulse is measured.Added up by the pump impulse quantity to slush pump, multiplied by the amount of being pumped into of a stroke, can be obtained
Know total drilling fluid total amount being pumped into well.But the upper water coefficient of pump is different, calculating equally exists error；
4) rubber plug bruising.Cementing plug is important attachment during well cementing operation, after pumping cement slurry, pumping
Rubber plug is launched before drilling fluid.There are three the main functions of rubber plug：One can separate cement slurry and drilling fluid, prevent from mutually going here and there, shadow
Ring cementing quality；The two glue bowls come on rubber plug play the role of scraping drilling rod, pipe string internal wall cement slurry；Three can play drilling fluid
Display effect in place, has rubber plug impacting seat in the design position of pipe string, when rubber plug reaches impacting seat, under rubber plug can not continue
Row, rubber plug top form sealing, tubing string pressure rise.After floor manager personnel observe pressure rise, stopping is pumped into drilling fluid,
Construction smoothly terminates at this time.This method is the key that scene judges rubber plug foundation in place.
It is poorly sealed with rubber plug impacting seat but if cementing plug is damaged, cause cementing plug in place after, pressure without
Apparent increase influences field engineer's judgement, will bring for empty risk hidden danger.In addition, sometimes in the actual construction process, by
It is excessively high in the sealing problem or operation pressure of rubber plug and impacting seat, cause rubber plug to fail to show in apparent pressure in place afterwards
It rises, will lead to incorrect decision, cause for sky.
Summary of the invention
For some or all of of the above-mentioned technical problem in the presence of the prior art, the invention proposes a kind of well cementation
Rubber plug positioning system and its localization method can more accurately position position of the rubber plug in tubing string.
In order to realize that the above technical purpose, the present invention provide following technical solution.
On the one hand, the invention proposes a kind of cementing plug positioning system, which includes the rubber plug in tubing string, also
Including the first active sonar and metering device, wherein the first active sonar, which sends sound wave into tubing string and receives, encounters the glue
The sound wave of back reflection is filled in, the metering device is according to the sound wave time difference sent and received and the obtained sound wave described
The spread speed in drilling fluid in tubing string is to position position of the rubber plug in tubing string.
In cementing plug positioning system of the invention, sound wave is sent by the first active sonar to measure and obtain in real time
It is transmitted with the measurement method of reflection not compared to existing by modes such as pressure risings by sound wave position of the rubber plug in tubing string
It is easy to be damaged by cementing plug or situations such as rubber plug impacting seat is poorly sealed is influenced, can more accurately position rubber plug and exist
Position in tubing string.
When implementing, the metering device includes the second active sonar, controller, calibration flow container and same with the rubber plug
The bottom of the calibration flow container is arranged in the rubber part of material, the rubber part, and second active sonar is located at the calibration
Above flow container, the controller is electrically connected with second active sonar.It is filled by the second active sonar and calibration liquid to obtain
Spread speed of the sound wave in this kind of drilling fluid.
Implement when, the metering device further includes flowmeter, the flowmeter and it is described calibration flow container entrance and
The outlet of the tubing string connects, and metering flows out the tubing string and flows into the flowing velocity of the drilling fluid of the calibration flow container.
When implementing, first active sonar sends sound wave into the tubing string, and sound wave encounters rubber plug back reflection, described
After first active sonar receives echo, the time difference of two sound waves is calculated, the time difference is multiplied by sound wave in this kind of drilling fluid
In spread speed after again divided by 2, obtain the real time position that the rubber plug is exported apart from tubing string.I.e. rubber plug is real-time in tubing string
Spread speed v* time difference Δ T/2 of the position S=sound wave in drilling fluid.
When implementing, first active sonar sends sound wave into the tubing string, and sound wave encounters rubber plug back reflection, described
After first active sonar receives echo, the time difference of two sound waves is sent to controller, the controller, which calculates, obtains glue
The real time position of plug.
When implementing, second active sonar sends sound wave to the calibration flow container and receives what the rubber part reflected
Sound wave, and the time difference of two sound waves of metering is passed into the controller, the controller, which calculates, obtains sound wave described
Spread speed in drilling fluid, the drilling fluid demarcated in flow container and the drilling fluid in the tubing string are same.Survey sound wave
Spread speed in same drilling fluid, since the height that calibration liquid fills is usually known or can measure to obtain,
It is easy to measure spread speed of the sound wave in the specific drilling fluid by controller.
On the other hand, the invention also provides a kind of cementing plug localization method, this approach includes the following steps：
It is pumped into the cement slurry of design flow into pipe string, switches the valve of cementing head, rubber plug enters in tubing string, is pumped into drilling well
Liquid；
First active sonar, which is powered into tubing string, sends sound wave, receives after the sound wave that rubber plug reflects, is calculated two
The time difference of a sound wave；
Second active sonar sends sound wave to calibration flow container, and after receiving sound wave, sending time difference is obtained to controller calculating
Obtain spread speed of the sound wave in the drilling fluid in the calibration flow container；
It is real-time in tubing string that the rubber plug is calculated according to the spread speed of the sound wave and the time difference in tubing string
Position.
When implementing, the rubber plug is calculated in tubing string according to the spread speed of the sound wave and the time difference in tubing string
In real time position include：
The controller removes after the spread speed in this kind of drilling fluid according to the time difference of two sound waves multiplied by sound wave again
With 2, the real time position of rubber plug is obtained.
When implementing, after second active sonar encounters the rubber part to calibration flow container transmission sound wave and reception
The sound wave of reflection, and the Time Transmission of metering is calculated into drilling fluid of the sound wave in the calibration flow container to the controller
In spread speed.
Compared with the prior art, the advantages of the present invention are as follows：
The present invention can learn the real time position of rubber plug by acoustic measurement, for the metering of check and correction tank, flowmeter meter
Amount, the accuracy of pump impulse metering.Reference is provided for cementing operation policymaker, improves cementing quality.
In addition, to improve speed accuracy in computation of the sound wave in drilling fluid, design has a calibration flow container.Flow into calibration
For the drilling fluid of flow container as the drilling fluid used when well cementation, the bottom for demarcating flow container is equipped with glue with cementing plug same material
Leather goods.Since the height of calibration flow container is standard value, when active sonar sends sound wave into calibration flow container, sound wave encounters calibration liquid
Emit after the rubber part of pot bottom, after active sonar receives echo, the time difference of two sound waves is calculated by controller, it can be with
Obtain spread speed of the sound wave in this kind of drilling fluid.Since not necessarily homogeneous can by calculating spread speed in real time for drilling fluid
To obtain more accurate Position on rubber stopper.
Detailed description of the invention
The preferred embodiment of the present invention is described in detail below in conjunction with attached drawing, in figure：
Fig. 1 shows one embodiment of cementing plug positioning system according to the present invention.
In attached drawing, identical component uses identical appended drawing reference.The attached drawing is not drawn according to the actual ratio.
Specific embodiment
In order to which technical solution of the present invention and advantage is more clearly understood, below in conjunction with attached drawing to of the invention exemplary
Embodiment is described in more detail.Obviously, the described embodiments are merely a part of the embodiments of the present invention, rather than
The exhaustion of all embodiments.And in the absence of conflict, the feature in the embodiment and embodiment in the present invention can be mutual
It combines.
Inventor is during invention it is noted that the metering methods such as the metering of existing tank, flowmeter metering, pump impulse metering are deposited
In the problem of metering inaccuracy.And when using rubber plug bruising mode in well cementing operation, rubber plug is launched in cement slurry and drilling fluid,
There is rubber plug impacting seat in the design position of pipe string, when rubber plug reaches impacting seat, rubber plug can not be continued traveling downwardly, and be formed above rubber plug
Sealing, tubing string pressure rise.Rubber plug rear apparent pressure rising in place is to judge the foundation of rubber plug in place, if but cementing plug hair
When raw damage and poorly sealed rubber plug impacting seat, bringing cementing plug, rear pressure is without significantly raised problem in place, thus shadow
Decision judgement is rung, is caused for sky.
Against the above deficiency, the embodiment of the present invention proposes a kind of cementing plug positioning system, is illustrated below.
Fig. 1 shows one of embodiment of cementing plug positioning system of the invention.In this embodiment, of the invention
Cementing plug positioning system mainly include rubber plug 2, the first active sonar 1 and metering device in the tubing string 5.Wherein,
One active sonar 1 is mounted on well head, is located at the top of tubing string 5, the first active sonar 1 mainly sent into tubing string 5 sound wave 3 and
Receive the sound wave for encountering 2 back reflection of rubber plug.Rubber plug 2 enters in tubing string 5 after cement slurry, the effect of rubber plug 2 and common well cementation glue
Fill in it is similar, primarily serve separate cement slurry and drilling fluid effect, prevent from mutually altering, influence cementing quality.In addition, rubber plug 2 may be used also
Play the role of glue bowl and scrapes 5 inside cement slurry of drilling rod and tubing string.When metering device is then mainly according to the sound wave sent and received
Between difference and obtained sound wave in the spread speed in the drilling fluid of tubing string 5 to position position of the rubber plug 2 in tubing string 5.
In one embodiment, metering device mainly include the second active sonar 8, controller 6, calibration flow container 9 and with
The rubber part 11 of 2 same material of rubber plug.Wherein, rubber part 11 is made into the bottom that calibration flow container 9 is arranged in the suitable shape of calibration flow container 9
Portion.Second active sonar 8 is located at the top of calibration flow container 9, directly can send sound wave into calibration flow container 9.Controller 6 and second
Active sonar 8 is electrically connected.
In one embodiment, the first active sonar 1 sends sound wave 3 into tubing string 5, and sound wave 3 encounters 2 back reflection of rubber plug,
After first active sonar 5 receives echo, can be calculated by included time calibrating instrument two sound waves time difference Δ T or
The time of two sound waves of record is sent to the calculating that controller 6 carries out time difference Δ T.After obtaining time difference Δ T, the time difference
Δ T multiplied by sound wave after the spread speed v in this kind of drilling fluid again divided by 2, obtain the real-time position of outlet of the rubber plug apart from tubing string 5
Set S.That is spread speed v* time difference Δ T/2 of real time position S=sound wave of the rubber plug in tubing string 5 in drilling fluid.
In a preferred embodiment, the first active sonar 1 sends sound wave into tubing string 5, and sound wave is encountered anti-after rubber plug 2
It penetrates.After first active sonar receives echo, the time difference of two sound waves is sent to controller 6, controller 6, which calculates, obtains glue
The real time position of plug 2.
In a preferred embodiment, the second active sonar 8 sends sound wave to calibration flow container 9 and receives rubber part 11 instead
The sound wave penetrated, and the time difference of two sound waves of metering is passed into controller 6, controller 6, which calculates, obtains sound wave in the drilling well
Spread speed in liquid 10.For accurate measurement, the drilling fluid 10 and the drilling fluid 4 in tubing string 5 demarcated in flow container 9 are same
Kind, the spread speed in Sonic drill well liquid 10 obtained in this way by measurement can be applied to calculate the real-time position of rubber plug 2 in tubing string 5
It sets.
In one embodiment, metering device further includes flowmeter 7.The outlet of flowmeter 7 and tubing string 5 and calibration flow container
The flowing velocity (or being flow velocity) of the drilling fluid of 9 entrance connection, metering outflow tubing string 5 and inflow calibration flow container 9.Drilling well
Liquid is flowed out from tubing string 5, by flowmeter 7, into calibration flow container 9.
On the other hand, the invention also provides a kind of cementing plug localization methods.This approach includes the following steps：
It is pumped into the cement slurry of design flow into pipe string, switches the valve of cementing head, rubber plug 2 enters in tubing string 5, is pumped into drilling well
Liquid；
First active sonar 1, which is powered into tubing string 5, sends sound wave 3, receives after the sound wave that rubber plug reflects, is calculated
The time difference Δ T of two sound waves；
Second active sonar 8 sends sound wave to calibration flow container 9, and after receiving sound wave, sending time difference is calculated to controller 6
Obtain spread speed v of the sound wave in the drilling fluid 10 in calibration flow container 9；
It is real-time in tubing string 5 that rubber plug 2 is calculated according to the spread speed v of sound wave 3 and in time difference Δ T in tubing string 5
Position S.
In addition, further including being pumped into design flow into tubing string at open hole well running string 5 (or casing) before cementing operation
Cement slurry, switch the valve of cementing head later, rubber plug 2 enters in tubing string 5, is pumped into drilling fluid.In addition, the first active sonar 1
It can be provided by the power supply on rig floor with the power supply of the second active sonar 8.
In a preferred embodiment, time difference Δ T according to the spread speed of sound wave and in tubing string 5 calculates institute
Stating real time position of the rubber plug 2 in tubing string 5 includes：
Controller 6 according to the time difference Δ T of two sound waves multiplied by sound wave 3 after the spread speed v in this kind of drilling fluid again
Divided by 2, the real time position of rubber plug 2 is obtained.
In one embodiment, the second active sonar 8 is anti-after encountering rubber part 11 to calibration flow container 9 transmission sound wave and reception
The sound wave penetrated, and the Time Transmission of metering is calculated into propagation speed of the sound wave in the drilling fluid in calibration flow container 9 to controller 6
Degree.The drilling fluid in flow container 9 is demarcated using drilling fluid identical with the drilling fluid in tubing string 5.And due to demarcating flow container 9
The parameters such as height it is known or measurable, pass through the parameters such as height and the drilling well in calibration flow container 9 of sound wave that measurement obtains
Spread speed v of the sound wave in the drilling fluid in calibration flow container 9 can be calculated in propagation time difference in liquid.Due to being that sound wave exists
Spread speed in same drilling fluid, thus in the case where not considering special, it is believed that brill of the sound wave in calibration flow container 9
The spread speed of drilling fluid of the spread speed with sound wave in tubing string 5 in well liquid is equal.
In one embodiment, when measurement, which obtains rubber plug 2, reaches predeterminated position, stopping is pumped into drilling fluid.
In the present invention, rubber plug 2 apart from the distance of the first active sonar 1 at well head or is converted into rubber plug 2 in tubing string 5
Real time position can be used as drilling fluid 4 reach predeterminated position reference frame.And design has rubber plug impacting seat in tubing string 5,
When rubber plug 2 reaches at rubber plug impacting seat, rubber plug 2 can not be continued traveling downwardly, and sealing, pressure rise in tubing string 5 are formed above rubber plug 2.
After floor manager personnel see, it can stop being pumped into drilling fluid, construction smoothly terminates.
In addition, in the present invention, it is of the same race in tubing string in the spread speed and sound wave demarcated in flow container 9 by measurement sound wave
The propagation time difference of drilling fluid can calculate the real time position for obtaining rubber plug 2.Since drilling fluid is generally non-mean value, pass through mark
The mode for determining the measurement of flow container 9 can improve accuracy, more accurately position the real time position of rubber plug 2, judge for site operation personnel
Rubber plug 2 provides basis in place.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.Therefore, it includes excellent that the following claims are intended to be interpreted as
Select embodiment and fall into having altered and/or modifying for the scope of the invention, the change that embodiment according to the present invention is made and/
Or modification should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of cementing plug positioning system, including the rubber plug being located in tubing string, which is characterized in that further include the first active sonar
And metering device, wherein the first active sonar sends sound wave into tubing string and receives the sound wave for encountering the rubber plug back reflection,
Drilling fluid of the metering device according to the sound wave time difference sent and received and the obtained sound wave in the tubing string
In spread speed to positioning position of the rubber plug in tubing string.
2. system according to claim 1, which is characterized in that the metering device include the second active sonar, controller,
Flow container and the rubber part with the rubber plug same material are demarcated, the bottom of the calibration flow container is arranged in the rubber part, described
Second active sonar is located above the calibration flow container, and the controller is electrically connected with second active sonar.
3. system according to claim 2, which is characterized in that the metering device further includes flowmeter, the flowmeter
It is connect with the outlet of the entrance and the tubing string of the calibration flow container, metering flows out the tubing string and flows into the calibration liquid
The flowing velocity of the drilling fluid of tank.
4. system according to claim 2 or 3, which is characterized in that first active sonar is sent into the tubing string
Sound wave, sound wave encounters rubber plug back reflection, after first active sonar receives echo, calculates the time difference of two sound waves, institute
State the time difference multiplied by sound wave after the spread speed in this kind of drilling fluid again divided by 2, obtain what the rubber plug was exported apart from tubing string
Real time position.
5. system according to claim 4, which is characterized in that first active sonar transmission sound into the tubing string
Wave, sound wave encounters rubber plug back reflection, and after first active sonar receives echo, the time difference of two sound waves is sent to control
Device processed, the controller calculate the real time position for obtaining rubber plug.
6. the system according to any one of claim 2 to 5, which is characterized in that second active sonar is to the mark
Determine flow container to send sound wave and receive the sound wave of rubber part reflection, and the time difference of two sound waves of metering is passed to described
Controller, the controller calculate the spread speed for obtaining sound wave in the drilling fluid, the drilling fluid in the calibration flow container
It is same with the drilling fluid in the tubing string.
7. a kind of cementing plug localization method, which is characterized in that this approach includes the following steps：
It is pumped into the cement slurry of design flow into pipe string, switches the valve of cementing head, rubber plug enters in tubing string, is pumped into drilling fluid；
First active sonar, which is powered into tubing string, sends sound wave, receives after the sound wave that rubber plug reflects, two sound are calculated
The time difference of wave；
Second active sonar sends sound wave to calibration flow container, and after receiving sound wave, sending time difference calculates to controller and obtains institute
State spread speed of the sound wave in the drilling fluid in the calibration flow container；
Real time position of the rubber plug in tubing string is calculated according to the spread speed of the sound wave and the time difference in tubing string.
8. the method according to the description of claim 7 is characterized in that according to the spread speed of the sound wave and in tubing string
Time difference calculates real time position of the rubber plug in tubing string：
The controller according to time differences of two sound waves multiplied by sound wave after the spread speed in this kind of drilling fluid again divided by 2,
Obtain the real time position of rubber plug.
9. according to the method described in claim 8, it is characterized in that, second active sonar is to the calibration flow container transmission sound
The sound wave of the rubber part back reflection is encountered in wave and reception, and the Time Transmission of metering is calculated the sound wave to the controller
Spread speed in the drilling fluid in the calibration flow container.
10. according to the method described in claim 9, it is characterized in that, stopping is pumped into brill when the rubber plug reaches predeterminated position
Well liquid.
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|---|---|---|---|
| CN201710303957.7A CN108825214B (en) | 2017-05-03 | 2017-05-03 | Well cementation rubber plug positioning system and positioning method thereof |
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| CN110924927A (en) * | 2019-11-15 | 2020-03-27 | 长江大学 | Method, device and equipment for downlink real-time positioning of well cementation rubber plug and storage medium |
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|---|---|---|---|---|
| CN110924927A (en) * | 2019-11-15 | 2020-03-27 | 长江大学 | Method, device and equipment for downlink real-time positioning of well cementation rubber plug and storage medium |
| CN110924927B (en) * | 2019-11-15 | 2023-06-27 | 长江大学 | Method, device, equipment and storage medium for positioning well cementation rubber plug downwards in real time |
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| CN108825214B (en) | 2021-07-27 |
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