CN108590633A - Ultra-high temperature drilling track inclination and temperature measurement control system and method and inclination and temperature measurement instrument - Google Patents
Ultra-high temperature drilling track inclination and temperature measurement control system and method and inclination and temperature measurement instrument Download PDFInfo
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- CN108590633A CN108590633A CN201810589524.7A CN201810589524A CN108590633A CN 108590633 A CN108590633 A CN 108590633A CN 201810589524 A CN201810589524 A CN 201810589524A CN 108590633 A CN108590633 A CN 108590633A
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- 238000005553 drilling Methods 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000009529 body temperature measurement Methods 0.000 title claims abstract description 13
- 238000005259 measurement Methods 0.000 claims abstract description 31
- 239000000835 fiber Substances 0.000 claims abstract description 9
- 238000012544 monitoring process Methods 0.000 claims abstract description 7
- 230000002159 abnormal effect Effects 0.000 claims abstract description 5
- 230000008569 process Effects 0.000 claims abstract description 5
- 239000013307 optical fiber Substances 0.000 claims description 14
- 238000012360 testing method Methods 0.000 claims description 12
- 241001449342 Chlorocrambe hastata Species 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 6
- 238000012546 transfer Methods 0.000 claims description 6
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 4
- 230000003028 elevating effect Effects 0.000 claims description 3
- 238000012545 processing Methods 0.000 abstract description 10
- 239000011435 rock Substances 0.000 description 8
- 230000001133 acceleration Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000005065 mining Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
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- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
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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
- E21B47/02—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
- E21B47/06—Measuring temperature or pressure
- E21B47/07—Temperature
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- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Geophysics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Gyroscopes (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention belongs to the technical field of high-temperature geothermal drilling and discloses an ultra-high-temperature borehole trajectory inclination and temperature measurement control system and method and an inclination temperature measuring instrument. The measurement module includes: the fiber optic gyro assembly and the accelerometer assembly are used for measuring the top angle and the azimuth angle of a drill hole, the tool face angle and the temperature and transmitting data to the FPGA data acquisition and interface circuit thereof; the FPGA data acquisition and interface circuit is used for transmitting the acquired data to the memory and transmitting the data to the DSP; and the DSP digital signal processor receives the program stored in the program memory, processes the data according to the program, is monitored by the monitoring reset circuit in the processing process, and resets the DSP digital signal processor when an abnormal condition occurs. The invention realizes continuous measurement in the drill hole under the high-temperature environment condition of 0-280 ℃ and is not influenced by magnetic interference.
Description
Technical field
The invention belongs to high-temperature geothermal drilling technique fields more particularly to a kind of superhigh temperature drilling track deviational survey thermometric to control
System and method, deviational survey temperature measurer.
Background technology
Currently, the prior art commonly used in the trade is such：Bore inclining thermometric is showing of being frequently encountered in drilling operation
As if drillhole inclination survey thermometric is inaccurate, a large amount of goods and materials production time will be expended, extend the drilling period, it cannot be guaranteed that quick drill
The demand of spy influences to exploit work.As mineral resources exploration work develops progressively towards deep, the temperature in drilling well is not yet
Disconnected to increase, in general area, when drilling depth reaches 8000 meters, temperature is up to 250 DEG C, in the xeothermic of geothermal gradient exception
Rock underground heat area, temperature is also by higher.And in the prior art be used for hyperthermal environments inclinometer may be only available for 250 DEG C with
Under environment deviational survey, bring high temperature hot dry rock earth-boring exploitation thermal capacity cannot computational problem, and temperature measurer can only be applicable in
In thermometric, the exploitation of deep-well resource is significantly limited so that high temperature hot dry rock earth-boring cannot use efficient two drillings
Connecting mining problem.Moreover, as drilling depth increases, borehole pressure is also increasing.Therefore a kind of high temperature resistant, resistance to height are provided
Pressure, drillhole inclination survey temperature measurer with high accuracy are very necessary.
In conclusion problem of the existing technology is：
Existing inclinometer may be only available for 250 DEG C of environment deviational surveys below, bring high temperature hot dry rock earth-boring
Exploit thermal capacity cannot computational problem, and may be only available for thermometric so that high temperature hot dry rock earth-boring cannot use efficient two
A drilling connecting mining problem, significantly limits the exploitation of deep-well resource.Under existing non-super high temperature and high pressure environment, single brill
Hole track or temperature measure, parallel measurement while cannot meeting drilling track and temperature under present superhigh-temperature and-pressure environment,
Lead to the exploitation inefficiency of resource.
Solve the difficulty and meaning of above-mentioned technical problem：Drilling track and temperature under superhigh-temperature and-pressure environment cannot
The problem measured simultaneously, brings the exploitation thermal capacity calculating of high temperature hot dry rock earth-boring and two drilling tracks measure docking and open
Adopt problem, significantly limit the exploitation of deep-well resource, under superhigh-temperature and-pressure environment drilling track and temperature while measure,
Solve the problems, such as that high temperature hot dry rock earth-boring exploitation thermal capacity calculates and two drilling tracks measure connecting mining simultaneously, greatly
Ground improves the exploitation efficiency of deep-well resource, provides the technical support that drilling track and temperature measure under superhigh-temperature and-pressure environment.
Under existing non-super high temperature and high pressure environment, single borehole track or temperature measure, and cannot meet present superhigh-temperature and-pressure environment
Parallel measurement while lower drilling track and temperature.
Invention content
In view of the problems of the existing technology, the present invention provides a kind of superhigh temperature drilling track deviational survey temp testing controlling systems
And method, deviational survey temperature measurer.
The invention is realized in this way a kind of superhigh temperature drilling track deviational survey temp testing controlling system, the superhigh temperature drilling
Track deviational survey temp testing controlling system includes：
TT＆C system, host computer；TT＆C system：It is exactly by Three-Axis Optical Fiber Gyro component and three-dimensional accelerometer component and heat
Thermocouple sensor sensitivity to angular acceleration, acceleration, temperature signal be converted to data-signal, and carry out data calculating to it
Processing, obtain apex angle, azimuth, temperature data values, and preserve in memory；Host computer：On the ground with observing and controlling system
System connection, 1. initialization TT＆C systems by TT＆C system internal data reset, and to TT＆C system carry out initial information parameter into
Row setting, it includes：Longitude, latitude, absolute altitude setting, absolute time setting, continuous acquisition time interval setting etc.；2. will preserve
Measurement data apex angle in memory, azimuth, temperature read and deposit, and form database.
The TT＆C system, host computer and measurement module, high temperature resistant measurement data memory module, down-hole power connection, peace
It in pressure-bearing insulating tube, is maintained in 0-80 DEG C of environmental field, makes its interior high temperature resistant measurement data memory module, down-hole power
Module can work normally；
The down-hole power is connect by conducting wire with measurement module.Power supply is provided for measurement module.
The measurement module further comprises：
Optic fiber gyroscope component and accelerometer module and temperature sensor, apex angle, azimuth and work for measuring wellbore
Have face angle and borehole temperature, and transfers data to FPGA data acquisition and its interface circuit；
FPGA data acquires and its interface circuit, for the data of acquisition to be transferred to memory, while by data transmission
To DSP digital signal processor；
DSP digital signal processor, DSP digital signal processor are a kind of heat safe band data processing calculating and logic
Calculation function singlechip chip.The program for receiving program storage storage, according to program, program：The software program storage write
In memory, after booting, TT＆C system runs the software program flow write according to this.First to Three-Axis Optical Fiber Gyro group
Part, three-dimensional accelerometer component, temperature components, voltage etc. carry out A/D conversions, are converted to data volume, then handle data,
The apex angle that is calculated, azimuth, temperature data values, it is preserved in chronological order in memory, processing procedure by
The monitoring of monitoring and reset circuit, encounters abnormal conditions and resets DSP digital signal processor, and protectiveness closing is carried out to circuit module
Processing is opened again after restoring normal condition；
Internal electric source is adopted by conducting wire and optic fiber gyroscope component, accelerometer module, temperature sensor assembly, FPGA data
Collection and its interface circuit, DSP digital signal processor connection.
Another object of the present invention is to provide one kind being equipped with the superhigh temperature drilling track deviational survey temp testing controlling system
Deviational survey temperature measurer.
Another object of the present invention is to provide a kind of superelevation of the superhigh temperature drilling track deviational survey temp testing controlling system
Warm drilling track deviational survey temperature measurement control method, the superhigh temperature drilling track deviational survey temperature measurement control method include：
Ultra-high temperature drilling deviational survey temperature measurer is connected to computer, to ultra-high temperature drilling deviational survey thermometric by step 1 with data line
Instrument is set；
Step 2 steel wire rope connection, is direct plungeed into or is dragged for by way of spearhead is salvaged and transfer ultra-high temperature drilling deviational survey
Temperature measurer；
Step 3 carries out deviational survey in lower brill and drilling process and works Digitalisation, memory-type optical fibre gyro deviational survey
Thermometric inserting tube carries out numeralization measurement along drilling track vertical angles, azimuth, borehole temperature parameter and stores；
Step 4 steel wire rope connection, direct plunges into or drags for elevating ultrahigh temperature drilling well deviational survey by way of spearhead is salvaged
Temperature measurer；
Step 5 takes out memory-type optical fibre gyro deviational survey thermometric inserting tube, memory-type optical fibre gyro deviational survey thermometric inserting tube is led to
It crosses data line to connect with computer, by computer disposal and display, obtains track and temperature measurement result.
Thermally sensitive temperature sensor is mounted on pressure-bearing pipe fitting, is passed through in plug for vacuum bottle and vacuum flask by high-temperature electric cable
Measurement assembly be connected, and the borehole temperature information measured is transferred in measurement assembly and is stored.
Another object of the present invention is to provide a kind of using the superhigh temperature drilling track deviational survey temperature measurement control method
Deviational survey temperature measurer.
In conclusion advantages of the present invention and good effect are：High temperature resistant, high pressure resistant, precision is high, and 0-280 may be implemented
In drilling under DEG C high ambient conditions hole angle, azimuth, instrument tool towards angle, borehole temperature while continuously measure, no
It is influenced by magnetic disturbance, measuring technique is provided for the mine resources prospecting exploitation under 280 DEG C of super-pressure 120MPa environment of superhigh temperature
Support.
The present invention looks into new (country-level Novelty Search Reference unit) by Institute of Science and Technology Information of Sichuan, looks into new knot
By for：1, have no that the document report with following memory-type drilling track measuring instruments, feature are both at home and abroad：Using depositing
Storage formula three-dimensional high-precision optical fibre gyro, three-dimensional high-precision quartz accelerometer and high-precision platinum resistance temperature sensor use
Storage data mode measures while realize no cable azimuthal, hole angle and well temperature, at the same obtain wellbore trajectory and
Temperature data.2, have no that the document report with following memory-type drilling track measuring instruments, feature are both at home and abroad：It should
Measuring instrument uses the compound outer tube of high temperature high voltage resistant, realizes deviational survey thermometric under 0-270 DEG C of high temperature, 120Mpa pressure environments.3、
Have no that the document report with following memory-type drilling track measuring instruments, technical indicator are both at home and abroad：Azimuth is surveyed
Measure range and ± 1.5 ° of (hole deviations of 0-360 ° of precision>At 3 °)；± 0.15 ° of directional survey range and 0-90 ° of precision, drilling well temperature are surveyed
Measure ± 0.2 DEG C ° of range and 0-300 ° of precision.
Description of the drawings
Fig. 1 is superhigh temperature drilling track deviational survey temp testing controlling system structural schematic diagram provided in an embodiment of the present invention；
In figure：1, TT＆C system；2, host computer；3, measurement module；3-1, optic fiber gyroscope component；3-2, accelerometer group
Part；3-3, FPGA data acquisition and its interface circuit；3-4, memory；3-5, DSP digital signal processor；3-6, monitoring and reset
Circuit；3-7, program storage；3-8, internal electric source；3-9, borehole temperature sensor；4, high temperature resistant measurement data memory module；
5, down-hole power.
Fig. 2 is superhigh temperature drilling track deviational survey temperature measurement control method flow chart provided in an embodiment of the present invention.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
As drilling depth increases, borehole pressure is also increasing；Therefore a kind of high temperature resistant, high pressure resistant, with high accuracy is provided
Drillhole inclination survey temperature measurer is very necessary.
As shown in Figure 1, superhigh temperature drilling track deviational survey temp testing controlling system provided in an embodiment of the present invention includes：Observing and controlling system
System 1, host computer 2, measurement module 3, high temperature resistant measurement data memory module 4, down-hole power 5.
TT＆C system 1, TT＆C system 1 are connect with measurement module 3, high temperature resistant measurement data memory module 4, down-hole power 5.
Down-hole power 5 is connect by conducting wire with measurement module 3.
Measurement module 3 further comprises：Optic fiber gyroscope component 3-1, accelerometer module 3-2, borehole temperature sensor 3-
9, FPGA data acquisition and its interface circuit 3-3, memory 3-4, DSP digital signal processor 3-5, monitoring and reset circuit 3-6,
Program storage 3-7, circuit internal electric source 3-8, down-hole power 5.
Optic fiber gyroscope component 3-1 and accelerometer module 3-2 and borehole temperature sensor 3-9, for measuring inclining for wellbore
Angle, azimuth and tool face azimuth and borehole temperature, and transfer data to FPGA data acquisition and its interface circuit 3-3.
FPGA data acquires and its interface circuit 3-3, for the data of acquisition to be transferred to memory 3-4, while will count
According to being transferred to DSP digital signal processor 3-5；
DSP digital signal processor 3-5 receives the program of program storage 3-7 storage, according to program to data at
Reason, the monitoring of the monitored reset circuit 3-6 of processing procedure, DSP digital signal processor 3-5 can be resetted by encountering abnormal conditions.
Power supply includes down-hole power 5 and circuit internal electric source 3-8, to ensure to work under emergency case.
Internal electric source 3-8 passes through conducting wire and optic fiber gyroscope component 3-1, accelerometer module 3-2, borehole temperature sensor 3-
9, FPGA data acquisition and its interface circuit 3-3, DSP digital signal processor 3-5 connections；Down-hole power 5 is 3 He of measurement module
High temperature resistant measurement data memory module 4 is powered.
TT＆C system：Exactly Three-Axis Optical Fiber Gyro component and three-dimensional accelerometer component and thermocouple sensor sensitivity are arrived
Angular acceleration, acceleration, temperature signal be converted to data-signal, and data calculation processing carried out to it, obtain apex angle, side
The data values of parallactic angle, temperature, and preserve in memory；Host computer：It is connected on the ground with TT＆C system, 1. initialization are surveyed
Control system allows TT＆C system internal data to reset, and carries out initial information parameter to TT＆C system and be configured, it includes：Through
Degree, latitude, absolute altitude setting, absolute time setting, continuous acquisition time interval setting etc.；2. measurement in memory will be preserved
Data apex angle, azimuth, temperature read and deposit, and form database.
DSP digital signal processor is a kind of heat safe band data processing calculating and logical operation function monolithic movement
Piece.The program for receiving program storage storage, according to program, program：In the software program storage memory write, after booting,
TT＆C system runs the software program flow write according to this.First to Three-Axis Optical Fiber Gyro component, three-dimensional accelerometer group
Part, temperature components, voltage etc. carry out A/D conversions, are converted to data volume, then handle data, the apex angle that is calculated, side
The data values of parallactic angle, temperature preserve it in memory, the prison of the monitored reset circuit of processing procedure in chronological order
Control, encounters abnormal conditions and resets DSP digital signal processor, carries out protectiveness closing processing to circuit module, restores positive reason
It is opened again after condition；
As shown in Fig. 2, superhigh temperature drilling track deviational survey temperature measurement control method provided in an embodiment of the present invention includes：
S201：Ultra-high temperature drilling deviational survey temperature measurer is connected to computer with data line, to ultra-high temperature drilling deviational survey temperature measurer
It is set；
S202：Steel wire rope connection, direct plunges into or drag for by way of spearhead is salvaged and transfer ultra-high temperature drilling inclinometer；
S203：Deviational survey work is carried out in lower brill and drilling process, memory-type optical fibre gyro deviational survey thermometric inserting tube is along drilling
Track vertical angles, azimuth, borehole temperature parameter carry out numeralization measurement and store；
S204：Steel wire rope connection, direct plunges into or drag for elevating ultrahigh temperature drilling well deviational survey by way of spearhead is salvaged and survey
Wen Yi；
S205：Memory-type optical fibre gyro deviational survey thermometric inserting tube is taken out, memory-type optical fibre gyro deviational survey thermometric inserting tube is passed through
Data line is connect with computer, by computer disposal and display, obtains track temperature measurement result.
The present invention meets high-temperature geothermal energy drilling project, hot dry rock drilling project, scientific drilling projrct, deep mineral resources
The great demand of exploration and Hydrocarbon Resource of The Deep Formation exploration engineering solves the problems, such as that hot environment drilling operation track, temperature measure.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (5)
1. a kind of superhigh temperature drilling track deviational survey temp testing controlling system, which is characterized in that the superhigh temperature drilling track deviational survey is surveyed
Temperature control system includes：
TT＆C system, host computer；
The TT＆C system, host computer and measurement module, high temperature resistant measurement data memory module, down-hole power connection；
The down-hole power is connect by conducting wire with measurement module.
2. superhigh temperature drilling track deviational survey temp testing controlling system as described in claim 1, which is characterized in that the measurement module
Further comprise：
Optic fiber gyroscope component and accelerometer module and temperature sensor, inclination angle, azimuth and tool-face for measuring drilling
Angle and borehole temperature, and transfer data to FPGA data acquisition and its interface circuit；
FPGA data acquires and its interface circuit, for the data of acquisition to be transferred to memory, while transferring data to DSP
Digital signal processor；
DSP digital signal processor receives the program of program storage storage, is handled data according to program, processes
The monitoring of the monitored reset circuit of journey encounters abnormal conditions and resets DSP digital signal processor；
Internal electric source passes through conducting wire and optic fiber gyroscope component, accelerometer module, FPGA data acquisition and its interface circuit, DSP
Digital signal processor connects.
3. a kind of deviational survey being equipped with superhigh temperature drilling track deviational survey temp testing controlling system described in claim 1~2 any one
Temperature measurer.
4. a kind of superhigh temperature drilling track deviational survey of superhigh temperature drilling track deviational survey temp testing controlling system as described in claim 1 is surveyed
Warm control method, which is characterized in that the superhigh temperature drilling track deviational survey temperature measurement control method includes：
Ultra-high temperature drilling deviational survey temperature measurer is connected to computer by step 1 with data line, to ultra-high temperature drilling deviational survey temperature measurer into
Row setting；
Step 2, in such a way that steel wire rope connects, direct plunges into or drag for spearhead salvaging, three kinds measure techniques and transfer superhigh temperature
Drilling well deviational survey temperature measurer；
Step 3 carries out deviational survey thermometric work during transferring or above proposing, and memory-type optical fibre gyro deviational survey thermometric inserting tube is along brill
Hole track vertical angles, azimuth, borehole temperature parameter carry out numeralization measurement and store；
Step 4 steel wire rope connection, direct plunges into or drags for elevating ultrahigh temperature drilling well deviational survey thermometric by way of spearhead is salvaged
Instrument；
Step 5 takes out memory-type optical fibre gyro deviational survey thermometric inserting tube, memory-type optical fibre gyro deviational survey thermometric inserting tube is passed through number
It is connect with computer according to line, by computer disposal and display, obtains track and temperature measurement result.
5. a kind of deviational survey temperature measurer using superhigh temperature drilling track deviational survey temperature measurement control method described in claim 4.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810589524.7A CN108590633A (en) | 2018-06-08 | 2018-06-08 | Ultra-high temperature drilling track inclination and temperature measurement control system and method and inclination and temperature measurement instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810589524.7A CN108590633A (en) | 2018-06-08 | 2018-06-08 | Ultra-high temperature drilling track inclination and temperature measurement control system and method and inclination and temperature measurement instrument |
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|---|---|
| CN108590633A true CN108590633A (en) | 2018-09-28 |
Family
ID=63623402
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|---|---|---|---|
| CN201810589524.7A Pending CN108590633A (en) | 2018-06-08 | 2018-06-08 | Ultra-high temperature drilling track inclination and temperature measurement control system and method and inclination and temperature measurement instrument |
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|---|---|---|---|---|
| CN101663787A (en) * | 2006-10-12 | 2010-03-03 | D·A·扎内斯 | Open electric circuits optimized in supercritical fluids that coexist with non supercritical fluid thin films to synthesis nano sclae products and energy production |
| CN102562031A (en) * | 2012-01-17 | 2012-07-11 | 中海油田服务股份有限公司 | Continuous gyroscopic survey system for directional well |
| GB2494051A (en) * | 2011-08-26 | 2013-02-27 | John C Rasmus | A method for estimating an interval density in a wellbore |
| US20150218936A1 (en) * | 2012-07-25 | 2015-08-06 | Precison Systems Internat Ip Pty Ltd | Down-hole monitoring and survey system |
| US20160017670A1 (en) * | 2012-02-22 | 2016-01-21 | Minnovare Limited | Apparatus for aligning drilling machines |
| CN105840180A (en) * | 2016-06-12 | 2016-08-10 | 中国地质科学院探矿工艺研究所 | Ultra-temperature drilling inclinometer |
| US20180058192A1 (en) * | 2016-08-29 | 2018-03-01 | Institute Of Geology And Geophysics, Chinese Academy Of Sciences | Near-bit tool attitude measurement while drilling apparatus and method |
-
2018
- 2018-06-08 CN CN201810589524.7A patent/CN108590633A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101663787A (en) * | 2006-10-12 | 2010-03-03 | D·A·扎内斯 | Open electric circuits optimized in supercritical fluids that coexist with non supercritical fluid thin films to synthesis nano sclae products and energy production |
| GB2494051A (en) * | 2011-08-26 | 2013-02-27 | John C Rasmus | A method for estimating an interval density in a wellbore |
| CN102562031A (en) * | 2012-01-17 | 2012-07-11 | 中海油田服务股份有限公司 | Continuous gyroscopic survey system for directional well |
| US20160017670A1 (en) * | 2012-02-22 | 2016-01-21 | Minnovare Limited | Apparatus for aligning drilling machines |
| US20150218936A1 (en) * | 2012-07-25 | 2015-08-06 | Precison Systems Internat Ip Pty Ltd | Down-hole monitoring and survey system |
| CN105840180A (en) * | 2016-06-12 | 2016-08-10 | 中国地质科学院探矿工艺研究所 | Ultra-temperature drilling inclinometer |
| US20180058192A1 (en) * | 2016-08-29 | 2018-03-01 | Institute Of Geology And Geophysics, Chinese Academy Of Sciences | Near-bit tool attitude measurement while drilling apparatus and method |
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