CN105840176A - Method and deice for measuring equal yield density while drilling - Google Patents
Method and deice for measuring equal yield density while drilling Download PDFInfo
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- CN105840176A CN105840176A CN201610217062.7A CN201610217062A CN105840176A CN 105840176 A CN105840176 A CN 105840176A CN 201610217062 A CN201610217062 A CN 201610217062A CN 105840176 A CN105840176 A CN 105840176A
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- 238000005553 drilling Methods 0.000 title claims abstract description 75
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000012530 fluid Substances 0.000 claims abstract description 35
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 11
- 238000009530 blood pressure measurement Methods 0.000 claims description 4
- 238000004458 analytical method Methods 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 abstract description 5
- 238000004140 cleaning Methods 0.000 abstract description 4
- 238000007654 immersion Methods 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 2
- 230000001133 acceleration Effects 0.000 description 24
- 238000005259 measurement Methods 0.000 description 22
- 238000006073 displacement reaction Methods 0.000 description 12
- 238000012544 monitoring process Methods 0.000 description 11
- 238000012790 confirmation Methods 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 210000002445 nipple Anatomy 0.000 description 6
- 238000004364 calculation method Methods 0.000 description 5
- 238000005070 sampling Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 230000010354 integration Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 238000001739 density measurement Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
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- 238000013461 design Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
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- 208000014674 injury Diseases 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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Classifications
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- 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
-
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/08—Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure
-
- 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
- E21B47/02—Determining slope or direction
- E21B47/022—Determining slope or direction of the borehole, e.g. using geomagnetism
-
- 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
- E21B47/04—Measuring depth or liquid level
-
- 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
- E21B47/06—Measuring temperature or pressure
-
- 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
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- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
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Abstract
The invention discloses a method and a device for measuring equal yield density while drilling. Annular pressure is measured while drilling, drilling depth and a well track are traced automatically in a downhole, the equal yield density of a drilling fluid and the change of the equal yield density are monitored in real time, whether the equal yield density is in an allowable safe window range is judged, conditions such as downhole pressure control, well cleaning, formation fluid immersion and the like can be mastered timely, a drilling technician can be effectively guided for construction, downhole troublesome conditions and accidents are prevented, drilling to a target layer is realized safely and smoothly, and expected drilling purposes such as reservoir protection and the like are achieved.
Description
Technical field
The present invention based on filing date on May 29th, 2014, Application No. 2014102338597,
The divisional application of the application for a patent for invention of invention entitled " with boring equal yield density measuring method and device ".
Relate to boring equal yield density monitoring method and device in oil, Natural Gas Drilling Operation, for obtaining in real time
Take down-hole equivalent drilling fluid density during drilling well, instruct narrow Density Window drilling well, extended reach well and owe flat
The job executions such as Heng Jing, reach drilling well safely and fast and effectively protect the purpose of reservoir.
Background technology
Along with oil-gas exploration and development constantly to Deep Development, geological conditions that drillng operation faces and stratum
Pressure system is increasingly complex, the narrow Density Window under the complex stratum condition such as leakage under spray leakage same layer, upper spray
Safety drilling outstanding problem, down hole problem and accident are frequent, it has also become restriction Deep Oil And Gas Exploration exploitation
Technical bottleneck.Solving the effective technical way of narrow Density Window drilling problem under complex stratum condition is
Implement fine controlled pressure drilling operation, therefore should monitor equivalent drilling fluid density in real time so that it is control permitting
In the range of Xuing, to guarantee drilling safety.
In big displacement and Horizontal Well Drilling well operations, along with creeping into of high angle hole section, annular space damages along journey
Consumption is continuously increased, and vertical depth increases slowly, is not even increased or decreased (such as hole angle >=90 ° well section),
Thus cause drilling fluid equivalent circulating density (ECD) to be stepped up, especially at slim-hole High angle
In the long displacement well section drilling well later stage, the control of equivalent circulating density is particularly important, and can it be to bore safely to reach
One key factor of design finishing drilling well depth.
For under-balance drilling operation, monitor equivalent drilling fluid density in real time so that it is less than formation pore
Density also maintains in rational pressure differential range, can effectively protect reservoir, reduces and reduces drilling fluid pair
The injury of oil-gas Layer, improves the rate of oil and gas recovery, significant to oil-gas exploration and development.Additionally,
With boring in real time monitoring equivalent drilling fluid density and change thereof, can also aid in understand in time well cleaning,
The situations such as formation fluid intrusion and drilling fluid leakage, for instructing lower step drillng operation to provide help.
Summary of the invention
Relate to downhole drill in consideration of it, it is an object of the invention to provide to monitor drilling fluid equivalent in real time close
The technical scheme of degree, equivalent drilling fluid density and situation of change thereof in motion tracking drilling process, for narrow
The job executions such as Density Window drilling well, extended reach well and underbalance well provide construction to instruct, and prevent down-hole
Complex situations and accident, reach the purpose such as drillng operation and protection oil and gas reservoir safely and fast.
Specifically, the invention provides a kind of with boring equal yield density measurement apparatus, including PWD
(Pressure While Drilling) parameter measurement instrument, MWD data communication instrument, its feature
It is, described PWD instrument is respectively provided with in drill string post and annular pressure sensor, is used for measuring
Drilling fluid fluid pressure, monitoring start-stop pump situation and the detection subsurface number of delivering a letter, PWD inside and outside drill string
On be also equipped with axial acceleration sensor, be used for measuring drill string axially-movable situation and to calculate drill string axial
Displacement, the application down-hole real-time tracking degree of depth is vertical deep with deviational survey data calculation pressure sensor position
Degree, and then try to achieve equivalent drilling fluid density, PWD passes through the same MWD of upper and lower data connector
(Measurement While Drilling) communication connects, and MWD is used for measurement while drilling orientation parameter
With upload underground survey parameter.
The present invention also provides for a kind of with boring equal yield density measuring method, it is characterised in that be included in down-hole
Memorizer is arranged and has bored well track basic parameter, borehole depth checkpoint, differently layer depth to be drilled
Degree allows equal yield density scope, pressure transducer and orientation parameter sensing station, pressure and axially adds
The parameter step such as velocity sensor sampling time；Under get into shaft bottom after drill string be in pause motion state,
Ground starts to creep into after down-hole transmission information, after initializing speed and axial displacement, utilizes acceleration
Sensor carries out drill string axially-movable distance (degree of depth) tracking step；The application down-hole real-time tracking degree of depth
With deviational survey data calculation pressure sensor position vertical depth, and then try to achieve equivalent drilling fluid density step,
Wherein, if equal yield density is beyond allowed band or deviation normal variation trend, timely by MWD
Uploading to ground system, and carry out early warning and show, otherwise to upload equivalent drilling well liquid-tight for separated in time
Degree；When (being typically set to creep into the degree of depth that makes up a joint) when brill reaches desired depth checkpoint, suspend drill string
Motion carries out deviational survey, after deviational survey uploads to ground system confirmation, sends information to down-hole and recovers to bore
Enter operation, continue drilling depth and follow the tracks of and with boring equal yield density monitoring until terminating to creep into operation.
The present invention also provides for a kind of measuring method for measuring drill string axially-movable distance, and its feature exists
In, utilize axial acceleration sensor measurement axial acceleration, then measurement axial acceleration is carried out
Filtering, is superimposed on DC error signal therein and noise interferences to filter, tries to achieve and have when creeping into
The drill string axially-movable acceleration of effect, can try to achieve axially-movable speed to integration of effective exercise acceleration
Degree；Again the axially-movable speed calculated is filtered, is superimposed on DC error therein to filter
Signal and noise interferences, try to achieve effective drill string axially-movable speed when creeping into, to effective exercise
Integration of speed can be tried to achieve and be moved axially distance, is achieved in drill string and moves axially the measurement of distance.
The present invention also provides for a kind of method that down-hole obtains complete deviational survey data, it is characterised in that pass through
Down-hole predetermined depth checkpoint, during to desired depth, suspends drillstring motion deviational survey and uploads measurement result,
Ground is lower photos and sending messages after confirming, thus down-hole can obtain measurement point depth data.
The present invention also provides for a kind of with boring equal yield density measuring method, it is characterised in that include with boring deep
Degree tracking step and equal yield density calculation procedure, i.e.
Obtain and measure some depth data, obtain displacement increment when creeping into, measurement pressure transducer and well
The tiltedly spacing between sensor, according to the depth data accurately obtained, described displacement increment and described
Spacing, tries to achieve annular pressure and measures some degree of depth L, calculate it further with deviational survey data corresponding vertical
Depth H, according to the annular pressure P of measurement while drillingaAnd correspondence vertical depth H, calculate equivalent drilling fluid
Density pe
In formula, g is acceleration of gravity.
The present invention also provides for a kind of with boring equal yield density method for uploading, it is characterised in that include being obtained
The equal yield density taken carries out analysis step and uploading step, i.e.
Utilize downhole stored ' Safe Density Windows tables of data, equal yield density scope ρ that inquiry allowsmin~
ρmax；
Judge equivalent drilling fluid density ρ calculated at pressure measurement point vertical depth HeThe most corresponding
Density range ρ that described tables of data is allowedmin～ρmax；
If equivalent drilling fluid density ρmin≤ρe≤ρmax, then separated in time is uploaded and is worked as with brill
Metric density ρe, otherwise, MWD uploads result immediately to ground system, and carries out early warning.
In the present invention, downhole tool basic configuration includes: positive pulse generator, turbogenerator,
Drive pipe nipple, battery sleeve pipe nipple, position finder pipe nipple, lower data connector, upper data connector, electricity
Pressure in pond and circuit, axial motion transducer, data readback interface, annular pressure sensor, post
Sensor etc..
In the present invention, equipped with in post and annular space on PWD (Pressure While Drilling) instrument
Pressure transducer, for measuring drilling fluid fluid pressure, monitoring start-stop pump situation and the inspection inside and outside drill string
Survey the subsurface number of delivering a letter；It is also equipped with axial acceleration sensor on PWD, is used for measuring drill string and axially transports
Emotionally condition and calculating drill string move axially distance；PWD passes through the same MWD of upper and lower data connector
(Measurement While Drilling) communication connects；MWD is used for measurement while drilling orientation parameter
With upload underground survey parameter.
In the present invention, before lower brill, arrange in downhole memory bored well track basic parameter,
Borehole depth checkpoint to be drilled, the Different Strata degree of depth allow equal yield density scope, pressure transducer and determine
To parameter sensors position, the parameter such as pressure and axial acceleration sensor sample time；Under get into well
, drill string is in pause motion state at the end, and ground starts to creep into after down-hole transmission information, initializes speed
After degree and axially displacement, utilize acceleration sensor to carry out drill string axially-movable distance (degree of depth) and follow the tracks of；
The application down-hole real-time tracking degree of depth and deviational survey data calculation pressure sensor position vertical depth, Jin Erqiu
Obtain equivalent drilling fluid density；If equal yield density is beyond allowed band or deviation normal variation trend, logical
Crossing MWD and upload to ground system in time, and carry out early warning and show, otherwise separated in time is uploaded
Equivalent drilling fluid density；(it is typically set to creep into the degree of depth that makes up a joint) when brill reaches desired depth checkpoint
Time, suspend drillstring motion and carry out deviational survey, after deviational survey uploads to ground system confirmation, send letter to down-hole
Cease and recover brill and creep into operation, continue drilling depth and follow the tracks of and with boring equal yield density monitoring until terminating to bore
Enter operation.
The effect of invention
The technical scheme measured in real time according to downhole drill equal yield density proposed by the invention, in drilling well
During measurement while drilling annular pressure, down-hole, from motion tracking drilling depth and well track, is monitored in real time
Equivalent drilling fluid density and change thereof, and judge equal yield density whether be in permission security window in the range of,
The situations such as down-hole pressure control, hole cleaning and formation fluid immersion can be grasped in time, effectively instruct
Drilling technology personnel construct, prevention down hole problem and accident, thus safety is bored smoothly and reached mesh
Layer, it is achieved reservoir protection etc. expection wellbore target.
Accompanying drawing explanation
Fig. 1 is that annular pressure measures system schematic.
Fig. 2 is with boring equal yield density measuring method flow chart.
Detailed description of the invention
With reference to the accompanying drawings the present invention is explained in detail.
Fig. 1 is that annular pressure measures system schematic.
As it is shown in figure 1, downhole tool is annular pressure measures system, basic configuration includes: positive pulse
Generator 1, turbogenerator 2, drive pipe nipple 3, battery sleeve pipe nipple 4, position finder pipe nipple 5, under
Data connector 6, upper data connector 7, battery and circuit 8, axial motion transducer 9, data
Playback interface 10, annular pressure sensor 11, post pressure sensor 12 etc..
Equipped with in post and annular pressure sensor on PWD instrument, for measuring the drilling fluid inside and outside drill string
Fluid pressure, monitoring start-stop pump situation and the detection subsurface number of delivering a letter；It is also equipped with on PWD axially accelerating
Degree sensor, is used for measuring drill string axially-movable situation and calculating drill string moving axially distance；PWD
Connected with MWD communication by upper and lower data connector；MWD for measurement while drilling orientation parameter and
Upload underground survey parameter.
Before lower brill, arrange in downhole memory and bored well track basic parameter, well to be drilled
Degree of depth checkpoint, the Different Strata degree of depth allow equal yield density scope, pressure transducer and orientation parameter to pass
The parameters such as sensor position, pressure and axial acceleration sensor sample time；Under get into drill string behind shaft bottom
Being in pause motion state, ground starts to creep into after down-hole transmission information, initializes speed and axially
After displacement, utilize acceleration sensor to carry out drill string axially-movable distance (degree of depth) and follow the tracks of；Application down-hole
The real-time tracking degree of depth and deviational survey data calculation pressure sensor position vertical depth, and then try to achieve equivalent brill
The liquid-tight degree of well；If equal yield density is beyond allowed band or deviation normal variation trend, pass through MWD
Uploading to ground system in time, and carry out early warning and show, otherwise separated in time uploads equivalent drilling well
Liquid-tight degree；When (being typically set to creep into the degree of depth that makes up a joint) when brill reaches desired depth checkpoint, suspend
Drillstring motion carries out deviational survey, after deviational survey uploads to ground system confirmation, sends information to down-hole and recovers
Brill creeps into operation, continues drilling depth and follows the tracks of and with boring equal yield density monitoring until terminating to creep into operation.
Fig. 2 is with boring equal yield density measuring method flow chart.
As in figure 2 it is shown, measuring method of the present invention and step are as follows:
One, PWD running parameter is set in downhole instrument, mainly includes data below:
1. appliance time parameter: instrument start-up time delay, pressure and axial acceleration sampling time；
PWD start-up time delay is according to preparation time, running speed before lower brill and starts to measure deeply
Degree determines.
The force samples time is wanted according to PWD underground work time, memory size and to monitoring pressure
Ask and consider.The generally sampling interval is 1～60 second/point.In order to monitor rapid pressure fluctuations situation,
Typical case's sampling interval is 1 second/point.
The axial acceleration sampling time is 0.001～0.1 second/point.
2. sensing station: ring compression sensor and orientation parameter sensor are away from bit location；
3. Different Strata (vertical depth) ' Safe Density Windows: initial depth, terminate the degree of depth, minimum density,
Maximal density；
Drilling well eye deviational survey tables of data the most: depth measurement L, hole angle α, azimuth
Borehole depth checkpoint table the most to be drilled: well depth
Two, instrument arrives drilling tool of staying off the feet after desired depth, and MWD measures orientation parameter and also uploads
To ground system；
Generally will be drilled the drilling depth drilling tool that makes up a joint to sit deviation sensor correspondence degree of depth when blocking and be set to directional survey
Point, the most both saved the time, also ensured that the accurate measurement result of acquisition.Connect single after, turn on pump
Circulating fluid, measurement data is uploaded to ground system by MWD.
Three, ground receiver to measure hole angle and azimuth after, after confirmation to down-hole send signal,
Start to creep into operation；
Ground is properly received after uploading data, sends confirmation signal to down-hole, starts to creep into operation.
Four, downhole stored deviational survey result (depth measurement, hole angle, azimuth), initializes speed and axle
To displacement increment；
After down-hole receives confirmation signal, store hole deviation measurement result data, and initialize drilling tool and axially move
Dynamic speed and axial displacement increment.
Five, measurement axial acceleration is filtered, obtains drill string axially-movable acceleration ax；
It is filtered measuring axial acceleration, filters and be superimposed on DC error signal therein and noise
Interference signal, tries to achieve effective drill string axially-movable acceleration a when creeping intox。
Six, to effective exercise acceleration axAxially-movable speed and drill string once can be asked to move with quadratic integral
Dynamic distance；
Integration of effective exercise acceleration can be tried to achieve axially-movable speed.
Again the axially-movable speed calculated is filtered, is superimposed on DC error therein to filter
Signal and noise interferences, try to achieve effective drill string axially-movable speed when creeping into, to effective exercise
Integration of speed can be tried to achieve and be moved axially distance.
Therefore utilize acceleration of motion axOnce can ask axially-movable speed and relative drill string with quadratic integral
The displacement Δ L of rest point.
Δ L=∫ ∫ ax
Seven, obtain annular pressure according to drill string displacement and measure some degree of depth L, and according to downhole stored
Deviational survey tables of data calculates its vertical depth H；
According to the accurate depth obtained when suspending drilling tool deviational survey, obtained position when creeping into by axial acceleration
Move the spacing between increment and pressure transducer and deviation sensor, annular pressure can be asked to measure some degree of depth L,
Its corresponding vertical depth H is calculated further with deviational survey data.
As a example by minimum-curvature method, the vertical depth increment △ H computing formula between 2 directional survey points is:
Δ H=LT(cosαi-1+cosαi)
γ=arccos [cos αi-1cosαi+sinαi-1sinαicos(φi-φi-1)]
L in formula, α,Be respectively depth measurement/m, hole angle/° and azimuth/°；γ is between two measuring points
Dogleg angle/°；LTTwo tangent section length/m for circular arc.
When being steady tilted section when between two measuring points, Δ H=(Li-Li-1)cosαi。
By accumulative each survey section vertical depth increment, and it is deep to utilize Interpolation Principle can try to achieve annular pressure measurement point
Degree L correspondence vertical depth H.
Eight, according to the annular pressure P of measurement while drillingaAnd correspondence vertical depth H calculating equivalent drilling well is liquid-tight
Degree ρe
In formula, g is acceleration of gravity.
Nine, according to downhole stored ' Safe Density Windows tables of data, density range ρ that inquiry allowsmin~
ρmax；
According to downhole stored ' Safe Density Windows tables of data, inquiry pressure measurement point vertical depth H is corresponding
Allow density range ρmin～ρmax。
If ten equivalent drilling fluid densities ρmin≤ρe≤ρmax, then separated in time upload with
Bore equal yield density ρe, otherwise, MWD uploads result immediately to ground system, and carries out early warning；
If calculating equivalent drilling fluid density ρeIn the range of Safe Density, i.e. ρmin≤ρe≤ρmax,
Then separated in time is uploaded with boring equal yield density ρe；Otherwise carrying out early warning, MWD uploads knot immediately
Help is analyzed and taken measures to provide to fruit, to ground system, in time for drillng operation workmen, and then
Prevent down hole problem and accident from occurring.
11, continue to creep into operation, to above-mentioned steps two.
At down-hole pressure under normal circumstances, continue to creep into operation, return step 2 and carry out with boring equivalent close
Degree monitoring in real time, instructs engineering to carry out drillng operation as technical staff.
To sum up, the present invention proposes a kind of with boring equivalent drilling fluid density measurement solution, surveys with boring
Amount annular pressure, down-hole is from motion tracking drilling depth and well track, and monitoring drilling fluid equivalent is close in real time
Degree and change, and judge equal yield density whether be in permission security window in the range of, can grasp in time
The situations such as down-hole pressure control, hole cleaning and formation fluid immersion, instruct drilling technology people effectively
Member constructs, prevention down hole problem and accident, thus safety is bored smoothly and reached target zone, it is achieved
The expection wellbore target such as reservoir protection.
Although the present invention being described in detail with embodiment above by reference to accompanying drawing, but, they
Being merely an illustrative, those skilled in the art are fully able to according to present invention teach that and making it respectively
The replacement of the form of kind or change, on the premise of without departing from present inventive concept and spirit, every to this
Various changes and modification that invention is made are accordingly to be regarded as the content that the present invention is contained, and each fall within appended right
Within the scope of requirement.
Claims (1)
1. one kind with bore equal yield density method for uploading, it is characterised in that include acquired equivalent close
Degree carries out analysis step and uploading step, i.e.
Utilize downhole stored ' Safe Density Windows tables of data, equal yield density scope ρ that inquiry allowsmin~
ρmax；
Judge equivalent drilling fluid density ρ calculated at pressure measurement point vertical depth HeThe most corresponding
Density range ρ that described tables of data is allowedmin～ρmax；
If equivalent drilling fluid density ρmin≤ρe≤ρmax, then separated in time is uploaded and is worked as with brill
Metric density ρe, otherwise, MWD uploads result immediately to ground system, and carries out early warning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610217062.7A CN105840176A (en) | 2016-04-08 | 2016-04-08 | Method and deice for measuring equal yield density while drilling |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610217062.7A CN105840176A (en) | 2016-04-08 | 2016-04-08 | Method and deice for measuring equal yield density while drilling |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111322060A (en) * | 2020-03-12 | 2020-06-23 | 中煤科工集团西安研究院有限公司 | Underground coal mine drilling depth metering method |
| CN114293936A (en) * | 2021-12-07 | 2022-04-08 | 中煤科工集团西安研究院有限公司 | Drilling state monitoring device and monitoring method of drilling machine |
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