CN109356572A - A kind of neutron density integrated instrument - Google Patents
A kind of neutron density integrated instrument Download PDFInfo
- Publication number
- CN109356572A CN109356572A CN201811295613.7A CN201811295613A CN109356572A CN 109356572 A CN109356572 A CN 109356572A CN 201811295613 A CN201811295613 A CN 201811295613A CN 109356572 A CN109356572 A CN 109356572A
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- pipe nipple
- density
- neutron
- processor
- lock
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- 210000002445 nipple Anatomy 0.000 claims abstract description 127
- 238000005259 measurement Methods 0.000 claims abstract description 45
- 238000000034 method Methods 0.000 claims abstract description 29
- 230000006835 compression Effects 0.000 claims abstract description 13
- 238000007906 compression Methods 0.000 claims abstract description 13
- 230000001133 acceleration Effects 0.000 claims abstract description 12
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 11
- 238000005755 formation reaction Methods 0.000 claims abstract description 11
- 230000001360 synchronised effect Effects 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 4
- 210000001367 artery Anatomy 0.000 claims description 2
- 210000003462 vein Anatomy 0.000 claims description 2
- 210000000481 breast Anatomy 0.000 claims 1
- 239000000523 sample Substances 0.000 abstract description 4
- 238000005553 drilling Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 238000011161 development Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011156 evaluation 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
- 239000003208 petroleum Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000002604 ultrasonography Methods 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
- E21B47/12—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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- Geophysics (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Remote Sensing (AREA)
- Acoustics & Sound (AREA)
- Measurement Of Radiation (AREA)
- Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
Abstract
The invention discloses a kind of neutron density integrated instrument, including compression tube, neutron pipe nipple, ultrasonic distance measurement pipe nipple, density pipe nipple and lock-out pulse device, the neutron pipe nipple, ultrasonic distance measurement pipe nipple and density pipe nipple are arranged inside the compression tube；The neutron pipe nipple includes sub-process device, for measuring formation porosity data；The ultrasonic distance measurement pipe nipple includes processor for ultrasonic wave, the distance for measuring measuring instrument to the borehole wall；The density pipe nipple includes density processor, acceleration transducer, the density processor is for measuring density of earth formations and photoelectric coefficient, the acceleration transducer is used to divide sector in tool-face and determine the position that measuring probe is directed toward, the lock-out pulse device includes lock-out pulse transmitter and lock-out pulse line, and the lock-out pulse transmitter is used to send out the synchronizing clock signals of step fixed frequency f.The present invention can reduce processor load, do not need quick response interruption, guarantee implementation, save the cost.
Description
Technical field
The present invention relates to drilling technology field, in particular to a kind of neutron density integrated instrument.
Background technique
Well logging new technology, which is embodied, produces fuel-displaced, gas objective with minimum cost, in order to more accurately evaluate ground
Layer and produce the directional process in drilling process.Current requirement of the petroleum industry to measurement accuracy and reliability, so that with
It bores logging technique application field constantly to expand, logging while drilling technology has pushed drilling well to a higher level.For China's mesh
The characteristics of preceding most oilfields are in mid-later development phase, develop thin layer, small fault-block reservoir, logging while drilling technology can be real-time
Geosteering and formation evaluation provide technical way.
Complex lithology formation is one important Exploration Domain of China's oil natural gas, and the detection for its lithologic character is past
Past is all the rare research hotspot of comparison.The development of drilling technology to complicated reservoirs, Complex Reservoir and fault block oil reservoir etc. intricately
The research of layer provides new approaches, improves work efficiency, and is extremely important for exploitation oil-gas reservoir.
Conventional neutron and densimeter setting will increase during instrument is worked there are three measuring tool face
Power consumption increases cost, and sampled data will interrupt during data are transmitted, it cannot be guaranteed that the company of data acquisition
Continuous property and accuracy rate, accordingly increase program complexity.
Summary of the invention
In view of the above problems in the prior art, the object of the present invention is to provide a kind of neutron density integrated instrument, with
Solve the problems, such as that processor load is big and data are synchronous.
In order to solve the above-mentioned technical problem, the specific technical solution of the present invention is as follows:
A kind of neutron density integrated instrument, including compression tube, neutron pipe nipple, ultrasonic distance measurement pipe nipple, density pipe nipple and
Lock-out pulse device, the neutron pipe nipple, ultrasonic distance measurement pipe nipple and density pipe nipple are sequentially connected, and are arranged in the compression tube
It is internal；
The neutron pipe nipple includes sub-process device, for measuring formation porosity data；
The ultrasonic distance measurement pipe nipple includes processor for ultrasonic wave, the distance for measuring measuring instrument to the borehole wall；
The density pipe nipple includes density processor, acceleration transducer, and the density processor is close for measuring stratum
Degree and photoelectric coefficient, the acceleration transducer are used to determine the position of tool measuring surface and determine the position that measuring probe is directed toward
It sets.
Further, the lock-out pulse device includes lock-out pulse transmitter and lock-out pulse line, the lock-out pulse
Transmitter is used to send out the synchronizing clock signals for walking fixed frequency f, and the lock-out pulse line is used for transmission pulse signal in described
Sub-processor and processor for ultrasonic wave.
Further, the neutron pipe nipple, ultrasonic distance measurement pipe nipple and density pipe nipple are connected in parallel on the lock-out pulse line.
Further, the neutron and densimeter further include power supply line and connection, the neutron pipe nipple, ultrasonic distance measurement
Pipe nipple and density pipe nipple are connected in turn on the power supply line, the neutron pipe nipple, ultrasonic distance measurement pipe nipple and density pipe nipple according to
It is secondary to be connected on the connection.
Further, the connection is for the letter between the neutron pipe nipple, ultrasonic distance measurement pipe nipple and density pipe nipple
Breath transmitting.
Further, the neutron pipe nipple also includes reservoir, and the reservoir is for storing neutron pipe nipple, ultrasound
The data measured away from pipe nipple and density pipe nipple.
Further, the density pipe nipple is also used for the function of measurement hole deviation and instrument revolving speed, and the density pipe nipple passes through
The power supply line and other loggers communicate.
Further, the sub-process device, processor for ultrasonic wave and density processor are respectively provided with counter, the counting
Device is for return pulse signal and guarantees the synchronous increase of return pulse signal.
Further, the counter is same model, and is the sub-process device, processor for ultrasonic wave and close
Spend a hardware adaptor component of processor.
Preferably, a kind of compression tube of neutron density integrated instrument is stainless steel material.
By adopting the above technical scheme, a kind of neutron density integrated instrument of the present invention has the following beneficial effects:
1. a kind of neutron density integrated instrument of the present invention, the setting of lock-out pulse device guarantees that measuring instrument can
Continuous service goes down, and ensure that implementation, reduces cost, improves efficiency.
2. a kind of neutron density integrated instrument of the present invention, counter is in sub-process device, processor for ultrasonic wave
With the peripheral hardware of density processor, reduce the operating load of processor, processor does not just have to response in operation to interrupt, and reduces
The complexity of program.
3. a kind of neutron density integrated instrument of the present invention, reduces the setting of acceleration transducer, only increase
One lock-out pulse line, optimizes structure.
Detailed description of the invention
It, below will be to required in embodiment or description of the prior art in order to illustrate more clearly of technical solution of the present invention
The attached drawing used is briefly described.It should be evident that drawings in the following description are only some embodiments of the invention, it is right
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings
Its attached drawing.
A kind of Fig. 1 component connection figure of neutron density integrated instrument of the present invention；
A kind of Fig. 2 lock-out pulse connection figure of neutron density integrated instrument of the present invention.
Appended drawing reference in figure: 1- compression tube, 2- neutron pipe nipple, 3- ultrasonic distance measurement pipe nipple, 4- density pipe nipple, 5- are synchronous
Pulser, 6- power supply line, 7- connection, 21- sub-process device, 22- reservoir, 31- processor for ultrasonic wave, at 41- density
Manage device, 51- lock-out pulse transmitter, 52- lock-out pulse line.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art without making creative work it is obtained it is all its
His embodiment, shall fall within the protection scope of the present invention.
It should be noted that description and claims of this specification and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so as to the embodiment of the present invention described herein can in addition to illustrating herein or
Sequence other than those of description is implemented.In addition, term " includes " and " having " and their any deformation, it is intended that cover
Covering non-exclusive includes to be not necessarily limited to for example, containing the process, method of a series of steps or units, device, product or equipment
Step or unit those of is clearly listed, but may include be not clearly listed or for these process, methods, product
Or other step or units that equipment is intrinsic.
Embodiment 1
According to Fig. 1, Fig. 2, the invention discloses a kind of neutron density integrated instruments, including compression tube 1, neutron
Pipe nipple 2, ultrasonic distance measurement pipe nipple 3, density pipe nipple 4 and lock-out pulse device 5, the neutron pipe nipple 2, ultrasonic distance measurement pipe nipple 3
It is sequentially connected, and is arranged inside the compression tube 1 with density pipe nipple 4；The setting of lock-out pulse device 5 is short in the density
Section is internal；The neutron pipe nipple 2 includes sub-process device 21, for measuring formation porosity data；The ultrasonic distance measurement is short
Section 3 includes processor for ultrasonic wave 31, the distance for measuring measuring instrument to the borehole wall；The density pipe nipple 4 includes density processor
41, acceleration transducer 42, the density processor 41 is for measuring density of earth formations and photoelectric coefficient, the acceleration transducer
The position that 42 position and determining measuring probe for determining tool measuring surface is directed toward；The lock-out pulse device 5 includes synchronizing
Impulse sender 51 and lock-out pulse line 52, the lock-out pulse transmitter 51 are used to send out the synchronised clock letter of step fixed frequency f
Number, the lock-out pulse line 52 is used for transmission pulse signal to the sub-process device 21 and processor for ultrasonic wave.The neutron
It further include power supply line 6 and connection 7 with densimeter, the neutron pipe nipple 2, ultrasonic distance measurement pipe nipple 3 and density pipe nipple 4 are connected in parallel on
On the power supply line 6, the neutron pipe nipple 2, ultrasonic distance measurement pipe nipple 3 and density pipe nipple 4 are connected in parallel on the connection 7.Institute
Connection 7 is stated for the information transmitting between the neutron pipe nipple 2, ultrasonic distance measurement pipe nipple 3 and density pipe nipple 4.The neutron
Pipe nipple 2 also includes reservoir 22, and the reservoir 22 is for storing neutron pipe nipple 2, ultrasonic distance measurement pipe nipple 3 and density pipe nipple 4
The data of measurement.The density pipe nipple 4 is also used for the function of measurement hole deviation and instrument revolving speed, and the density pipe nipple 4 passes through described
Power supply line 6 and other loggers communicate.The sub-process device 21, processor for ultrasonic wave 31 and density processor 41 are respectively provided with
Counter, the counter is for return pulse signal and guarantees the synchronous increase of return pulse signal.The counter is same
Model, and be a hardware adaptor component of the sub-process device 21, processor for ultrasonic wave 31 and density processor 41.
According to neutron density integrated instrument described above, instrument follows down-hole equipment to turn every with 60-120 at work
Measurement data is divided into 8 sectors according to tool-face in rotation, forms the measurement of neutron density by the speed rotation of minute, instrument
Image, since each pipe nipple requires tool-face measurement data for data point sector, place tool face is surveyed in each pipe nipple
It is unrealistic to measure circuit, will increase power consumption incessantly, increases cost, and will increase program complexity.Whenever instrument goes to 45 degree
Angle is to notify all pipe nipples to enter next sector on the data line, therefore directly pass by the data line between pipe nipple
Defeated tool-face handover information is also unrealistic, because there are also other data on data line, real-time is too poor, lags tens millis sometimes
Second, half of sector possible in this way has had been rotated through.And tool-face measuring circuit is measured using acceleration transducer, in underground
Drilling well vibration can just obtain relatively accurate tool-face information so that data need to filter, therefore detect tool-face when instrument
The certain delay that will appear when more than 90 degree, so that institute's measured data is difficult synchronous recording, so so with the letter of a radical word
The method that number line triggers other pipe nipples switching sector also has certain lag.
Therefore the lock-out pulse device 5 is set, the lock-out pulse device 5 by send a fixed frequency f when
Clock signal, this signal are received by the processor of neutron pipe nipple 2, ultrasonic distance measurement pipe nipple 3 and density pipe nipple 4 simultaneously,
And it is recorded on three counters.Counter often receives a pulse signal and just adds one, ensures that the neutron is short
The Counter Value of the processor of section 2, ultrasonic distance measurement pipe nipple 3 and density pipe nipple 4 at any time is the same.It is described in this way
Neutron pipe nipple 2, ultrasonic distance measurement pipe nipple 3 and the counter of density pipe nipple 4 be all it is synchronous increased, each pipe nipple is carrying out
The count value of each sampled point of synchronous recording when data sampling can determine the accurate corresponding of each sampling by the count value
Moment.In this way, just merely adding a lock-out pulse line just solves the problems, such as that response is interrupted, most of processing is all at backstage
Reason, reduces cost.
Embodiment 2
According to Fig. 1, Fig. 2, the invention discloses a kind of neutron density integrated instruments, including compression tube 1, neutron
Pipe nipple 2, ultrasonic distance measurement pipe nipple 3, density pipe nipple 4 and lock-out pulse device 5, the neutron pipe nipple 2, ultrasonic distance measurement pipe nipple 3
It is sequentially connected, and is arranged inside the compression tube 1 with density pipe nipple 4；The setting of lock-out pulse device 5 is short in the density
Section is internal；The neutron pipe nipple 2 includes sub-process device 21, for measuring formation porosity data；The ultrasonic distance measurement is short
Section 3 includes processor for ultrasonic wave 31, the distance for measuring measuring instrument to the borehole wall；The density pipe nipple 4 includes density processor
41, acceleration transducer 42, the density processor 41 is for measuring density of earth formations and photoelectric coefficient, the acceleration transducer
The position that 42 position and determining measuring probe for determining tool measuring surface is directed toward；The lock-out pulse device 5 includes synchronizing
Impulse sender 51 and lock-out pulse line 52, the lock-out pulse transmitter 51 are used to send out the synchronised clock letter of step fixed frequency f
Number, the lock-out pulse line 52 is used for transmission pulse signal to the sub-process device 21 and processor for ultrasonic wave.The neutron
It further include power supply line 6 and connection 7 with densimeter, the neutron pipe nipple 2, ultrasonic distance measurement pipe nipple 3 and density pipe nipple 4 are connected in parallel on
On the power supply line 6, the neutron pipe nipple 2, ultrasonic distance measurement pipe nipple 3 and density pipe nipple 4 are connected in parallel on the connection 7.Institute
Connection 7 is stated for the information transmitting between the neutron pipe nipple 2, ultrasonic distance measurement pipe nipple 3 and density pipe nipple 4.The neutron
Pipe nipple 2 also includes reservoir 22, and the reservoir 22 is for storing neutron pipe nipple 2, ultrasonic distance measurement pipe nipple 3 and density pipe nipple 4
The data of measurement.The density pipe nipple 4 is also used for the function of measurement hole deviation and instrument revolving speed, and the density pipe nipple 4 passes through described
Power supply line 6 and other loggers communicate.The sub-process device 21, processor for ultrasonic wave 31 and density processor 41 are respectively provided with
Counter, the counter is for return pulse signal and guarantees the synchronous increase of return pulse signal.The counter is same
Model, and be a hardware adaptor component of the sub-process device 21, processor for ultrasonic wave 31 and density processor 41.
The compression tube of the neutron and densimeter is stainless steel material.
According to a kind of neutron density integrated instrument described above, the counter is same model, and is described
One hardware adaptor component of sub-process device 21, processor for ultrasonic wave 31 and density processor 41, program firmware is to described three
After the pin of a processor is configured, this pin will be connected to the counting unit inside processor, external TTL arteries and veins
Rush signal will the value of flip-flop number unit increase, pulse increases by one, this process does not need processor participation, in other words
Say the computing capability for not consuming processor.Processor can read the count value of counting unit when needed.So if
Processor is without this function, and receiving pulse preprocessor, just must interrupt the code being carrying out at once adds one to counter,
Then the code that front executes is returned again to, thus will increase the load of processing.Therefore the counter of peripheral hardware of the present invention can subtract
Few processor load, reduces the power consumption of processor, reduces the program complexity of processor.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of neutron density integrated instrument, which is characterized in that including compression tube (1), neutron pipe nipple (2), ultrasonic distance measurement
Pipe nipple (3), density pipe nipple (4) and lock-out pulse device (5), the neutron pipe nipple (2), ultrasonic distance measurement pipe nipple (3) and density
Pipe nipple (4) is sequentially connected, and is arranged internal in the compression tube (1)；
The neutron pipe nipple (2) includes sub-process device (21), for measuring formation porosity data；
The ultrasonic distance measurement pipe nipple (3) includes processor for ultrasonic wave (31), the distance for measuring measuring instrument to the borehole wall；
The density pipe nipple (4) includes density processor (41), acceleration transducer (42), and the density processor (41) is used for
Density of earth formations and photoelectric coefficient are measured, the acceleration transducer (42) is used to determine the position of tool measuring surface and determines measurement
The position for direction of popping one's head in；
The lock-out pulse device (5) includes lock-out pulse transmitter (51) and lock-out pulse line (52), the lock-out pulse hair
Emitter (51) setting is internal in the density pipe nipple (4), for sending out the synchronizing clock signals of step fixed frequency f, the synchronous arteries and veins
Breast the tape (52) be used for transmission pulse signal to the sub-process device (21) and processor for ultrasonic wave.
2. a kind of neutron density integrated instrument according to claim 1, which is characterized in that the neutron pipe nipple (2) surpasses
Sound ranging pipe nipple (3) and density pipe nipple (4) are connected in parallel on the lock-out pulse line (52).
3. a kind of neutron density integrated instrument according to claim 1, which is characterized in that the neutron and densimeter are also
Including power supply line (6) and connection (7), the neutron pipe nipple (2), ultrasonic distance measurement pipe nipple (3) and density pipe nipple (4) are connected in parallel on
On the power supply line (6), the neutron pipe nipple (2), ultrasonic distance measurement pipe nipple (3) and density pipe nipple (4) are connected in parallel on the communication
On line (7).
4. a kind of neutron density integrated instrument according to claim 3, which is characterized in that the connection (7) is used for
Information transmitting between the neutron pipe nipple (2), ultrasonic distance measurement pipe nipple (3) and density pipe nipple (4).
5. a kind of neutron density integrated instrument according to claim 1, which is characterized in that the neutron pipe nipple (2)
Including reservoir (22), the reservoir (22) is for storing neutron pipe nipple (2), ultrasonic distance measurement pipe nipple (3) and density pipe nipple
(4) data measured.
6. a kind of neutron density integrated instrument according to claim 1, which is characterized in that the density pipe nipple (4)
For measuring the function of hole deviation and instrument revolving speed, the density pipe nipple (4) is logical by the power supply line (6) and other loggers
News.
7. a kind of neutron density integrated instrument according to claim 1, which is characterized in that the sub-process device
(21), processor for ultrasonic wave (31) and density processor (41) are respectively provided with counter, and the counter is used for return pulse signal
And guarantees that return pulse signal is synchronous and increase.
8. a kind of neutron density integrated instrument according to claim 7, which is characterized in that the counter is same type
Number, and be a hardware adaptor of the sub-process device (21), processor for ultrasonic wave (31) and density processor (41)
Component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811295613.7A CN109356572B (en) | 2018-11-01 | 2018-11-01 | Neutron density integration instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811295613.7A CN109356572B (en) | 2018-11-01 | 2018-11-01 | Neutron density integration instrument |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109356572A true CN109356572A (en) | 2019-02-19 |
| CN109356572B CN109356572B (en) | 2022-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811295613.7A Active CN109356572B (en) | 2018-11-01 | 2018-11-01 | Neutron density integration instrument |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1605713A (en) * | 2004-10-21 | 2005-04-13 | 山东科技大学 | Ultrasonic well logging instrument |
| CN102758611A (en) * | 2012-07-23 | 2012-10-31 | 吉艾科技（北京）股份公司 | Bamboo joint connecting method of logger string |
| US20130213714A1 (en) * | 2012-02-21 | 2013-08-22 | Baker Hughes Incorporated | Acoustic synchronization system, assembly, and method |
| CN204126640U (en) * | 2014-10-15 | 2015-01-28 | 北京捷威思特科技有限公司 | π storage type logging system |
| US20170211375A1 (en) * | 2014-12-05 | 2017-07-27 | Halliburton Energy Services, Inc. | Downhole clock calibration apparatus, systems, and methods |
-
2018
- 2018-11-01 CN CN201811295613.7A patent/CN109356572B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1605713A (en) * | 2004-10-21 | 2005-04-13 | 山东科技大学 | Ultrasonic well logging instrument |
| US20130213714A1 (en) * | 2012-02-21 | 2013-08-22 | Baker Hughes Incorporated | Acoustic synchronization system, assembly, and method |
| CN102758611A (en) * | 2012-07-23 | 2012-10-31 | 吉艾科技（北京）股份公司 | Bamboo joint connecting method of logger string |
| CN204126640U (en) * | 2014-10-15 | 2015-01-28 | 北京捷威思特科技有限公司 | π storage type logging system |
| US20170211375A1 (en) * | 2014-12-05 | 2017-07-27 | Halliburton Energy Services, Inc. | Downhole clock calibration apparatus, systems, and methods |
Non-Patent Citations (1)
| Title |
|---|
| 赵燕: "新型遥传短节与测量仪器接口电路研制", 《中国优秀硕士学位论文全文数据库（电子期刊）信息科技辑》 * |
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| CN109356572B (en) | 2022-07-22 |
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