CN110813683B - Low-frequency transmitting transducer for acoustic wave far detection while drilling - Google Patents
Low-frequency transmitting transducer for acoustic wave far detection while drilling Download PDFInfo
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- CN110813683B CN110813683B CN201910973695.4A CN201910973695A CN110813683B CN 110813683 B CN110813683 B CN 110813683B CN 201910973695 A CN201910973695 A CN 201910973695A CN 110813683 B CN110813683 B CN 110813683B
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- piezoelectric ceramic
- ceramic ring
- fixing seat
- drilling
- corrugated pipe
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- 238000005553 drilling Methods 0.000 title claims abstract description 32
- 238000001514 detection method Methods 0.000 title claims abstract description 25
- 239000000919 ceramic Substances 0.000 claims abstract description 76
- 238000007789 sealing Methods 0.000 claims abstract description 14
- 229920002545 silicone oil Polymers 0.000 claims abstract description 5
- 230000010287 polarization Effects 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 3
- 238000011161 development Methods 0.000 abstract description 8
- 239000003921 oil Substances 0.000 description 26
- 238000005516 engineering process Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
-
- 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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Acoustics & Sound (AREA)
- Remote Sensing (AREA)
- Geophysics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention discloses a low-frequency transmitting transducer for sound wave far detection while drilling, which comprises a second piezoelectric ceramic ring, wherein a first piezoelectric ceramic ring is sleeved on the outer side of the second piezoelectric ceramic ring, a corrugated pipe is sleeved on the outer side of the first piezoelectric ceramic ring, the tops of the first piezoelectric ceramic ring and the second piezoelectric ceramic ring are fixed through a first fixing seat, the bottoms of the first piezoelectric ceramic ring and the second piezoelectric ceramic ring are fixed through a second fixing seat, sealing rings are arranged between the inner wall of the corrugated pipe and the first fixing seat as well as between the inner wall of the corrugated pipe and the second fixing seat, and silicone oil is filled in a cavity formed among the corrugated pipe, the first fixing seat and the second fixing seat. The invention has excellent performance in the frequency band range of 300-1000Hz, can spread a distance of hundreds of meters in a stratum, can bear high temperature and high pressure, has small size and low frequency, is suitable for a sound wave far detection instrument while drilling, and promotes the development and application of the far detection technique while drilling.
Description
Technical Field
The invention relates to the field of acoustic logging while drilling, in particular to a low-frequency transmitting transducer for acoustic far detection while drilling
Background
In recent years, with the continuous deepening of oil and gas exploration and development, the oil and gas exploration and development is developing from a conventional oil and gas reservoir to a low-permeability unconventional oil and gas reservoir, the reservoir conditions of a newly-built area become increasingly complex, the resource quality is increasingly poor, and the difficulty of improving the yield of a single well is increasingly high. At present, conventional logging-while-drilling equipment cannot meet the requirements of exploration and development of complex oil and gas reservoirs, a remote-while-drilling detection logging technology is urgently needed, and accurate real-time drilling geological guiding and later-stage comprehensive oil reservoir evaluation are realized. At present, only Sterenbach and Beckhols oil field service companies have commercial logging technology and equipment for remote detection while drilling internationally, and expensive construction service is provided for domestic sales of instruments of the type. Due to the technical difficulty in developing the acoustic wave far-detection while drilling instrument, particularly the development of the low-frequency transmitting transducer while drilling, no mature technical method and product exist in China.
At present, conventional logging-while-drilling equipment cannot meet the requirements of exploration and development of complex oil and gas reservoirs, a remote-while-drilling detection logging technology is urgently needed, and accurate real-time drilling geological guiding and later-stage comprehensive oil reservoir evaluation are realized. For the far-while-drilling detection acoustic logging technology, the biggest technical problem at present is the development of a low-frequency transmitting transducer while drilling, and no mature product exists at present in China.
Disclosure of Invention
The invention aims to provide a low-frequency transmitting transducer for sound wave far detection while drilling, which solves the problems in the prior art, has excellent performance in the frequency band range of 300-1000Hz, can propagate a distance of hundreds of meters in a stratum, can bear high temperature and high pressure, has small size and low frequency, is suitable for a sound wave far detection while drilling instrument, and promotes the development and application of the sound wave far detection while drilling technology.
In order to achieve the purpose, the invention adopts the following technical scheme:
a low-frequency transmitting transducer for acoustic wave far detection while drilling comprises a second piezoelectric ceramic ring, a first piezoelectric ceramic ring is sleeved outside the second piezoelectric ceramic ring, a corrugated pipe is sleeved outside the first piezoelectric ceramic ring, positive and negative electrode welding spots on the surfaces of the first piezoelectric ceramic ring and the second piezoelectric ceramic ring are connected with leads respectively, the first piezoelectric ceramic ring and the second piezoelectric ceramic ring are connected in parallel, the polarization directions of the first piezoelectric ceramic ring and the second piezoelectric ceramic ring are opposite, the top parts of the first piezoelectric ceramic ring and the second piezoelectric ceramic ring are fixed through a first fixed seat, the bottom parts of the first piezoelectric ceramic ring and the second piezoelectric ceramic ring are fixed through a second fixed seat, sealing rings are arranged between the inner wall of the corrugated pipe and the first fixing seat and between the inner wall of the corrugated pipe and the second fixing seat, and silicone oil is filled in a cavity formed among the corrugated pipe, the first fixing seat and the second fixing seat.
Further, the first fixing seat and the second fixing seat are made of rubber.
Furthermore, the upper end of the first fixing seat is connected with a pressure balance oil tank, and an oil filling hole is designed in the pressure balance oil tank.
Further, the distance between the corrugated pipe and the first piezoelectric ceramic ring is 3 mm.
Further, the distance between the first piezoelectric ceramic ring and the second piezoelectric ceramic ring is 3 mm.
Further, the sealing ring is an O-shaped sealing ring.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention has novel and ingenious design, adopts the structural design of nesting two piezoelectric ceramic rings, and the piezoelectric ceramic rings and the sealing surface form a cavity, thereby reducing the resonance frequency of the transducer, keeping the structure of the transducer compact, having excellent performance in the low frequency range of 300-1000Hz and being capable of transmitting the distance of hundreds of meters in the stratum. More importantly, the transducer structure can bear high temperature and high pressure, is small in size, can fully utilize the radial space of a logging instrument, is convenient for the maintenance and the function expansion of the instrument, and is very suitable for the sound wave remote detection while drilling.
Furthermore, the first fixing seat and the second fixing seat are made of rubber materials, are moderate in hardness, and have good anti-vibration performance while fixing the piezoelectric ceramic ring.
Furthermore, the working frequency of the transducer is directly influenced by the distance between the piezoelectric circular rings of the transducer, and the performance of the transducer is optimal when the distance is 3mm through numerical simulation and physical test of the transducer.
Furthermore, because the energy converter is internally filled with oil bodies, the oil bodies have certain expansion coefficients, when the temperature of the working environment of the energy converter changes, the volume of the oil bodies can be changed therewith, and the volume of the oil bodies in the energy converter can be automatically adjusted through the pressure balance oil tank, so that the working performance of the energy converter is not influenced by the temperature, and the stability of the energy converter is improved.
Drawings
FIG. 1 is a cross-sectional front view of a low-frequency transmitting transducer for acoustic far-detection while drilling;
FIG. 2 is a top view of a low-frequency transmitting transducer for acoustic far-detection while drilling;
FIG. 3 is a diagram of impedance test of a low-frequency transmitting transducer for acoustic far-detection while drilling;
FIG. 4 is a graph of voltage transmission response of a low-frequency transmitting transducer for sound wave far-detection while drilling.
Wherein, 1, corrugated pipe; 2. a seal ring; 3. a first piezoelectric ceramic ring; 4. a second piezoelectric ceramic ring; 5. a first fixed seat; 6. a second fixed seat.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1 to 2, a low frequency transmitting transducer for acoustic wave remote detection while drilling comprises a second piezoelectric ceramic ring 4, a first piezoelectric ceramic ring 3 is sleeved outside the second piezoelectric ceramic ring 4, a corrugated pipe 1 is sleeved outside the first piezoelectric ceramic ring 3, positive and negative welding spots on the surfaces of the first piezoelectric ceramic ring 3 and the second piezoelectric ceramic ring 4 are connected with wires, the wires are connected with electricity, the first piezoelectric ceramic ring 3 and the second piezoelectric ceramic ring 4 are connected in parallel, the polarization directions of the first piezoelectric ceramic ring 3 and the second piezoelectric ceramic ring 4 are opposite, the tops of the first piezoelectric ceramic ring 3 and the second piezoelectric ceramic ring 4 are fixed by a first fixing seat 5, the bottoms of the first piezoelectric ceramic ring 3 and the second piezoelectric ceramic ring 4 are fixed by a second fixing seat 6, a sealing ring 2 is arranged between the inner wall of the corrugated pipe 1 and the first fixing seat 5 and the second fixing seat 6, and silicone oil is filled in a cavity formed among the corrugated pipe 1, the first fixed seat 5 and the second fixed seat 6.
The following is a further detailed description of the practice of the invention:
the low-frequency transmitting transducer for sound wave far detection while drilling adopts two piezoelectric ceramic rings, the diameters of the two piezoelectric ceramic rings are different, so that the two piezoelectric ceramic rings have different resonant frequencies, the two ends of the two piezoelectric ceramic rings are fixed by adopting rubber seats, the outside of the rings is sealed by a corrugated pipe, silicon oil is filled in the transducer, and a closed oil cavity is formed in the whole transducer.
The positive and negative electrodes of the two piezoelectric ceramic circular rings are connected with leads, the polarization directions of the two piezoelectric ceramic circular rings are opposite, and the two piezoelectric ceramic circular rings are connected in parallel. For two piezoelectric ceramic rings with different diameters, the resonance frequency of the large piezoelectric ceramic ring is high, the resonance frequency of the small piezoelectric ceramic ring is low, and the bandwidth of a resonance peak is narrow. Because the piezoelectric ceramic rings are connected in parallel, when the transducer is excited, the resonant frequency of the whole transducer is reduced, a resonant peak is formed near 600Hz, and the bandwidth is good.
Specifically, the low-frequency transmitting transducer is composed of a corrugated pipe 1, a sealing ring 2, a first piezoelectric ceramic ring 3, a second piezoelectric ceramic ring 4, a first fixing seat 5 and a second fixing seat 6.
As shown in fig. 1, the first piezoceramic ring 3 and the second piezoceramic ring 4 are fixed by the first fixing seat 5 and the second fixing seat 6. The sealing of the transducer is mainly completed by a corrugated pipe 1 and a sealing ring 2, and the corrugated pipe 1 and a transducer framework form a closed space. After the transducer is installed, the pressure balance oil tank upper oil injection hole connected with the upper end of the first fixing seat 5 of the transducer is vacuumized, and then silicone oil is filled. A pressure balance oil tank is designed at the upper end of the energy converter, when the temperature of the instrument entering a well rises, the volume of an oil body in the energy converter becomes large, and the pressure is increased, so that a balance piston in the oil tank is pushed, and the pressure balance in the energy converter is kept.
As shown in fig. 2, the distances between the bellows 1 and the first and second piezoelectric ceramic rings 3 and 4 are both 3mm, and the distance between the first and second piezoelectric ceramic rings 3 and 4 has a large influence on the performance of the transducer and needs to be adjusted according to actual conditions.
As shown in FIG. 3, the conductance measurement curve for the impedance test of the transducer satisfies the linear condition in the frequency band of 200-3000Hz, and the transducer has a resonance peak at the frequency point of 600 Hz.
As shown in FIG. 4, the transmission response curves of the voltage measured by the transducer are larger than 90dB in the 500-1000Hz frequency band range, and 100dB is reached in the 600Hz transmission response.
Claims (3)
1. A low-frequency transmitting transducer for acoustic wave far detection while drilling is characterized by comprising a second piezoelectric ceramic ring (4), wherein a first piezoelectric ceramic ring (3) is sleeved on the outer side of the second piezoelectric ceramic ring (4), a corrugated pipe (1) is sleeved on the outer side of the first piezoelectric ceramic ring (3), positive and negative welding spots on the surfaces of the first piezoelectric ceramic ring (3) and the second piezoelectric ceramic ring (4) are respectively connected with a lead, the first piezoelectric ceramic ring (3) and the second piezoelectric ceramic ring (4) are connected in parallel, the polarization directions of the first piezoelectric ceramic ring (3) and the second piezoelectric ceramic ring (4) are opposite, the tops of the first piezoelectric ceramic ring (3) and the second piezoelectric ceramic ring (4) are fixed through a first fixing seat (5), the bottoms of the first piezoelectric ceramic ring (3) and the second piezoelectric ceramic ring (4) are fixed through a second fixing seat (6), sealing rings (2) are arranged between the inner wall of the corrugated pipe (1) and the first fixing seat (5) and the second fixing seat (6), and silicone oil is filled in a cavity formed among the corrugated pipe (1), the first fixing seat (5) and the second fixing seat (6);
the upper end of the first fixed seat (5) is connected with a pressure balance oil tank, and an oil filling hole is formed in the pressure balance oil tank; the distance between the corrugated pipe (1) and the first piezoelectric ceramic ring (3) is 3 mm; the distance between the first piezoelectric ceramic ring (3) and the second piezoelectric ceramic ring (4) is 3 mm.
2. The while-drilling acoustic wave remote detection low-frequency transmitting transducer is characterized in that the first fixing seat (5) and the second fixing seat (6) are both made of rubber.
3. The while-drilling acoustic wave remote detection low-frequency transmitting transducer according to claim 1, wherein the sealing ring (2) is an O-shaped sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910973695.4A CN110813683B (en) | 2019-10-14 | 2019-10-14 | Low-frequency transmitting transducer for acoustic wave far detection while drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910973695.4A CN110813683B (en) | 2019-10-14 | 2019-10-14 | Low-frequency transmitting transducer for acoustic wave far detection while drilling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110813683A CN110813683A (en) | 2020-02-21 |
| CN110813683B true CN110813683B (en) | 2021-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910973695.4A Active CN110813683B (en) | 2019-10-14 | 2019-10-14 | Low-frequency transmitting transducer for acoustic wave far detection while drilling |
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| Country | Link |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111472753A (en) * | 2020-04-26 | 2020-07-31 | 中国石油天然气集团有限公司 | Dipole sound wave transmitting probe |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1379622A (en) * | 1971-02-25 | 1975-01-02 | Siemens Ag | Piezoelectric motors |
| CN101254499A (en) * | 2008-04-18 | 2008-09-03 | 北京信息工程学院 | Big opening angle stack wafer transmitting transducer |
| CN201482706U (en) * | 2009-09-10 | 2010-05-26 | 浙江师范大学 | Cylinder shape ultrasonic transducer |
| CN106179931A (en) * | 2016-09-07 | 2016-12-07 | 哈尔滨龙声超声技术有限公司 | A kind of transducing unit of ultrasonic transducer |
| CN106903037A (en) * | 2017-01-23 | 2017-06-30 | 中国科学院苏州生物医学工程技术研究所 | Ultrasonic transducer, ultrasonic array probe and ultrasonic image-forming system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0979686A3 (en) * | 1998-08-12 | 2002-02-06 | Ueda Japan Radio Co., Ltd. | Porous piezoelectric ceramic sheet and piezoelectric transducer |
-
2019
- 2019-10-14 CN CN201910973695.4A patent/CN110813683B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1379622A (en) * | 1971-02-25 | 1975-01-02 | Siemens Ag | Piezoelectric motors |
| CN101254499A (en) * | 2008-04-18 | 2008-09-03 | 北京信息工程学院 | Big opening angle stack wafer transmitting transducer |
| CN201482706U (en) * | 2009-09-10 | 2010-05-26 | 浙江师范大学 | Cylinder shape ultrasonic transducer |
| CN106179931A (en) * | 2016-09-07 | 2016-12-07 | 哈尔滨龙声超声技术有限公司 | A kind of transducing unit of ultrasonic transducer |
| CN106903037A (en) * | 2017-01-23 | 2017-06-30 | 中国科学院苏州生物医学工程技术研究所 | Ultrasonic transducer, ultrasonic array probe and ultrasonic image-forming system |
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| Publication number | Publication date |
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| CN110813683A (en) | 2020-02-21 |
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