CN102400679B - Tangential polarization monopole energy converter applicable to multi-level array sound wave well logging - Google Patents
Tangential polarization monopole energy converter applicable to multi-level array sound wave well logging Download PDFInfo
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- CN102400679B CN102400679B CN201010279099.5A CN201010279099A CN102400679B CN 102400679 B CN102400679 B CN 102400679B CN 201010279099 A CN201010279099 A CN 201010279099A CN 102400679 B CN102400679 B CN 102400679B
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Abstract
The invention relates to a tangential polarization monopole energy converter applicable to multipole array sound wave well logging. The energy converter comprises a binding post (1), an insulator (2), a core shaft (3), an upper end cover (4), a terminal washer (5), an insulation core shaft (6), a lower end cover (8), a nut (9), an electrode lead (10) and a screw (11). The energy converter is characterized by also comprising a spliced ceramic tube (7), wherein the spliced ceramic tube (7) is formed by bonding a plurality of tangential polarization piezoelectric ceramic wafers of which end faces are fan-shaped by using a high-temperature adhesive; silver layers are coated on two inclined edge surfaces of the fan-shaped tangential polarization piezoelectric ceramic wafers; and an outer layer of the spliced ceramic tube (7) is poured by using the high-temperature adhesive and glass fiber in a winding mode. The tangential polarization monopole energy converter has the advantages that: by using a tangential polarization splicing ceramic tube, higher transmission power and transmission efficiency can be obtained at low frequency; receiving sensitivity is improved; and stability and reliability are realized.
Description
Technical field
The present invention relates to logger technical field, particularly, the present invention relates to a kind of for the shear-polarization monopole transducer in MAC.
Background technology
In recent years, along with going deep into of geology and oil exploration, to the expectation of logger with require also more and more higher, acoustic logging is one of important method of oil well logging.The acoustic logging of current employing utilizes transmitting transducer to send sound wave in down-hole, propagates in underground medium, after certain hour decay, is accepted transducer and accepts, by the acoustic signals analysis to decay, judge the relevant geologic structure of underground.Acoustic wave transducer comprises monopole acoustic wave transducer and dipole acoustic transducer etc., the mainly compressional wave signal that monopole soic wave transmitting energy converter excites, the mainly shear wave signal that dipole acoustic transmitting transducer excites.The acoustic logging instrument usually adopted now is the Conventional sound logger of monopole sound source, its shortcoming is cannot extracting directly shear wave parameter, also be difficult to obtain to compressional wave parameter in cased well, therefore, the judgement for soft formation parameter very important in oil exploration seems very weak.In order to overcome the defect of this Conventional sound logger, or have increase dipole acoustic transducer on original instrument, shear wave parameter in, hard formation soft with extracting directly, but the tranmitting frequency that this kind of way is confined to original monopole transducer is high, loss is large, sensitivity is low, Permeability Parameters accurately cannot be obtained, and Permeability Parameters to ask for be the important topic that oil well logging faces all the time, it is very great that it accurately asks for meaning on evaluation oil production rate and reserves.In addition the structure of old conventional instrument, also cannot realize multiple logging mode.Such as, cement bond log is method conventional in oil well logging, be mainly used to measure the bonding quality of cement grouting after oil well setting of casing, the method measuring principle and one pole metering system similar, but spacing (distance between transmitter and receiver) requires longer, therefore, just need to change instrument during cement bond logging well just can carry out.
In order to more low-frequency compressional wave can be launched, Stoneley wave speed and decay in sound acoustic wave train logging is utilized to ask for reservoir permeability, and multiple logging mode can be realized, Chinese invention 03261891.3 proposes one " Multi-pole subarray acoustic logging changer ", monopole, dipole and Stoneley wave transducer is utilized to form multi-polar sound source, directly can measure the compressional wave on stratum, shear wave, Stoneley wave parameter, both can mutually with reference to checking, also can process separately, substantially increase confidence level and the range of application of instrument.The piezoelectric ceramic tube of radial polarised that what the monopole transmitting transducer in this invention and monopole receiving transducer adopted is, between wall thickness 1 ~ 5mm, pipe inside and outside wall is silver coated, for welding electrode.The receive MUT sensitivity of this structure is higher, due to the characteristic of piezoelectric ceramics, electrode both sides add voltage in the same way and can compress, add backward voltage can stretch, the tensile strength of piezoelectric ceramics self is limited, too high backward voltage can make himself to ftracture, and this just determines monomer earthenware cannot apply too large voltage, is also just difficult to obtain larger transmitting power.The way of current making monomer earthenware first suppresses heavy wall cast stock, and then through mechanical lapping inside and outside circle, obtain the earthenware of thin-walled, in mechanical processing process, earthenware is very easy to break, and yield rate is lower, this adds increased cost of manufacture.In the process of radial polarised, technological requirement is also very strict, and because polarizing, the cracked and defect caused also happens occasionally.Use the making of the transducer of this monomer earthenware and use and also need exactissima diligentia, installation and transportation are all very inconvenient.In subsurface environment, the reason of Yin Wendu and pressure, earthenware easily breaks.Electrode welding point on inside and outside wall also easily comes off.In order to larger transmitting power can be provided, there is higher receiving sensitivity simultaneously, segmentation electric pole type annular earthenware can be adopted to replace radial polarised piezoelectric ceramic tube, the technical difficulty of this structure is how extraction electrode, in United States Patent (USP) NO.3142032, what adopt is metal forming or net, between the electrode sticking to the splicing of every two split assemblies, and the part welding electrode utilizing metal sandwich to glue to extend out in seam.But equipment complex process, along with increasing of piece, the effective electro-mechanical couple factor of oscillator declines; Metal sandwich is different from the coefficient of thermal expansion of piezoelectric ceramics, therefore easily produces stress cracking.Chinese invention CN85201622 proposes a kind of electrode lead-out mode without metal sandwich, by the way extraction electrode exposed the silver coating of piezoelectric ceramics bar local, thus simplify assembly technology, improve yield rate, improve electromechanical coupling characteristics, possess more stable electric property simultaneously.The time that this invention proposes relatively early, this method can only make the transducer of volume comparatively large (diameter is greater than 30 centimetres), the transducer prepared by this method can only be applied in and not require field to its volume, so be confined to the experiment field, ocean such as low-frequency high-power transmitter, acoustic release instruction sound source and detonated underwater acoustic apparatus under water.Invention CN85201622 is that all to determine its range of application from volume size or technical scheme can only be deep water marine field, and the technical requirements of completely discontented sufficient sound wave well logging transducer, acoustic logging is as one and diverse field, deep water ocean, also harsher to the requirement of transducer, acoustic logging transducer requires size relatively little (within diameter 10 centimetres), amount ratio is larger, cost requirement is lower, therefore the present invention again this basis on by further improvement, prepare the transducer being applicable to well logging field.
Summary of the invention
The object of the present invention is to provide a kind of for the shear-polarization monopole transducer in MAC, successfully solve monopole transducer Problems existing in existing MAC.
Of the present invention provide comprise for the shear-polarization monopole transducer in MAC: prap 1, insulator 2, mandrel 3, upper end cover 4, terminal pad 5, insulation mandrel 6, spliced ceramic pipe 7, bottom end cover 8, nut 9, contact conductor 10, screw 11;
Described transducer also comprises spliced ceramic pipe 7 for shear-polarization piezoelectric ceramic piece, end face is fan-shaped, silver coated on two fan-shaped inclined edge surfaces, by the bonding one-tenth annular of high-temp glue, use high-temp glue and glass fiber winding cast, in its radial applying with prestressing force, apply with prestressing force in its radial direction, when low frequency large amplitude, not easily broken; The electrode of spliced ceramic pipe 7 is by the mode of the silver coating of piezoelectric ceramics bar local exposure being drawn.
One as such scheme is improved, and described terminal pad 5, insulation mandrel 6, insulator 2 are polytetrafluoro material or other high-temperature insulation materials; Upper end cover 4, bottom end cover 8, mandrel 3, nut 9, screw 11 are stainless steel material.
As another improvement of such scheme, it is characterized in that, described prap 1 is silver plated metals material, especially uses fine copper silver coating material.
As another improvement of such scheme, described contact conductor 10 is high temperature resistant wire, and its skin has polytetrafluoroethylene (PTFE) to clad, and heart yearn is multiply silver plated metals silk.
Improve as the also a kind of of such scheme, described shear-polarization piezoelectric ceramic piece is exotic material, and its curie point is higher than 375 DEG C.
The invention has the advantages that: provided by the invention a kind of for the shear-polarization monopole transducer in MAC, conventional radial polarised earthenware is substituted by adopting shear-polarization spliced ceramic pipe, make can obtain larger transmitting power during low frequency, and emission effciency, have very high receiving sensitivity, to have electric property reliable and stable for this structure transducer simultaneously, the firm difficult drop-off of electrode pads simultaneously, earthenware is not easily broken, the features such as high temperature high voltage resistant.
Accompanying drawing explanation
Fig. 1 transducer sectional drawing of the present invention;
The structure chart of Fig. 2 earthenware of the present invention.
Accompanying drawing identifies
1, prap 2, insulator 3, mandrel
4, upper end cover 5, terminal pad 6, insulation mandrel
7, spliced ceramic pipe 8, bottom end cover 9, nut
10, contact conductor 11, screw 12, ceramic bar
13, extraction electrode
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, structure of the present invention is described in more detail.
As shown in Figure 1, transducer of the present invention comprises: prap 1, insulator 2, mandrel 3, upper end cover 4, terminal pad 5, insulation mandrel 6, spliced ceramic pipe 7, bottom end cover 8, nut 9, contact conductor 10, screw 11; In addition transducer also comprises spliced ceramic pipe 7 for shear-polarization piezoelectric ceramic piece, end face is fan-shaped, silver coated on two fan-shaped inclined edge surfaces, by the bonding one-tenth annular of high-temp glue, use high-temp glue and glass fiber winding cast, in its radial applying with prestressing force, apply with prestressing force in its radial direction, when low frequency large amplitude, not easily broken; The electrode of spliced ceramic pipe 7 is by the mode of the silver coating of piezoelectric ceramics bar local exposure being drawn;
Wherein, spliced ceramic pipe 7 two ends coaxial cooperation terminal pad 5, be installed between upper end cover 4 and bottom end cover 8, there is ring-like youngster mandrel 3 one end, for upper end cover 4 coaxial cooperation, mandrel 3 outer wall be sliding combined with insulation mandrel 6, realized fixing by screw 11, mandrel 3 other end has screw thread, by nut 9, is fixed and clamped by spliced ceramic pipe 7.Contact conductor 10 is through the through hole on upper end cover, and be separately fixed on prap 1, prap 1 is installed on insulator 2.
The extraction electrode 13 of spliced ceramic pipe 7 is by the mode of the silver coating of piezoelectric ceramics bar 12 local exposure being drawn as shown in Figure 2.
It should be noted last that, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted.Although with reference to embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, modify to technical scheme of the present invention or equivalent replacement, do not depart from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (3)
1. for the shear-polarization monopole transducer in MAC, comprising: prap (1), insulator (2), mandrel (3), upper end cover (4), terminal pad (5), insulation mandrel (6), bottom end cover (8), nut (9), contact conductor (10), screw (11); It is characterized in that, this transducer also comprises spliced ceramic pipe (7);
Described spliced ceramic pipe (7) is that fan-shaped shear-polarization piezoelectric ceramic piece forms by high-temp glue is bonding by some end faces, silver coated on two inclined edge surfaces of described fan-shaped shear-polarization piezoelectric ceramic piece, spliced ceramic pipe (7) skin uses high-temp glue and glass fiber winding cast;
The electrode of described spliced ceramic pipe (7) is by the mode of the silver coating of piezoelectric ceramics bar local exposure being drawn;
Described contact conductor (10) is high temperature resistant wire, and its skin has polytetrafluoroethylene (PTFE) to clad, and heart yearn is multiply silver plated metals silk;
Described shear-polarization piezoelectric ceramic piece is exotic material, and its curie point is higher than 375 DEG C.
2. according to claim 1 for the shear-polarization monopole transducer in MAC, it is characterized in that, described terminal pad (5), insulation mandrel (6), insulator (2) are made for high-temperature insulation material, comprise polytetrafluoro material.
3. according to claim 1ly it is characterized in that for the shear-polarization monopole transducer in MAC, described prap (1) is silver plated metals material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010279099.5A CN102400679B (en) | 2010-09-10 | 2010-09-10 | Tangential polarization monopole energy converter applicable to multi-level array sound wave well logging |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010279099.5A CN102400679B (en) | 2010-09-10 | 2010-09-10 | Tangential polarization monopole energy converter applicable to multi-level array sound wave well logging |
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| Publication Number | Publication Date |
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| CN102400679A CN102400679A (en) | 2012-04-04 |
| CN102400679B true CN102400679B (en) | 2015-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010279099.5A Expired - Fee Related CN102400679B (en) | 2010-09-10 | 2010-09-10 | Tangential polarization monopole energy converter applicable to multi-level array sound wave well logging |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2637043A1 (en) | 2011-12-22 | 2013-09-11 | Services Pétroliers Schlumberger | Systems and methods for downhole cement evaluation |
| CN104612613B (en) * | 2015-01-28 | 2017-07-28 | 中国科学院声学研究所 | Piezoelectric type vibration device |
| CN107580274B (en) * | 2017-07-20 | 2021-04-20 | 哈尔滨工程大学 | Inlaid bending disc underwater acoustic transducer |
| CN108343427B (en) * | 2018-04-24 | 2024-07-09 | 杭州丰禾石油科技有限公司 | Logging while drilling instrument mandrel |
| CN111119869B (en) * | 2018-11-01 | 2023-04-04 | 中国石油化工股份有限公司 | Ultrasonic transducer detection device and detection method of ultrasonic transducer while drilling |
| CN112796738A (en) * | 2021-02-04 | 2021-05-14 | 西南石油大学 | Stratum permeability calculation method combining array acoustic logging and conventional logging |
| CN115121467A (en) * | 2022-05-27 | 2022-09-30 | 中国长江三峡集团有限公司福建分公司 | Spliced tangential polarization piezoelectric ceramic tube and single-stage sub-transducer |
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| CN2621300Y (en) * | 2003-06-03 | 2004-06-23 | 中海油田服务股份有限公司 | Multi-polar subarray acoustic logging transducer |
| CN1595059A (en) * | 2004-06-23 | 2005-03-16 | 中国科学院地质与地球物理研究所 | Transducer for rock mass project model internal ultrasonic testing |
| CN101121165A (en) * | 2007-09-04 | 2008-02-13 | 浙江师范大学 | Piezoelectric ultrasonic transducer |
| CN201810297U (en) * | 2010-09-10 | 2011-04-27 | 北京锐致聪科技有限公司 | Tangentially polarized monopole transducer of multi-pole acoustic array logging |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85201622U (en) * | 1985-05-07 | 1986-07-16 | 中国科学院声学研究所 | Separating electrode annulus vibrator of piezo-electric energy transducer |
| US7339494B2 (en) * | 2004-07-01 | 2008-03-04 | Halliburton Energy Services, Inc. | Acoustic telemetry transceiver |
| CN201143494Y (en) * | 2008-01-11 | 2008-11-05 | 中国石油天然气集团公司 | Large power acoustic emission transducer |
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2010
- 2010-09-10 CN CN201010279099.5A patent/CN102400679B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2621300Y (en) * | 2003-06-03 | 2004-06-23 | 中海油田服务股份有限公司 | Multi-polar subarray acoustic logging transducer |
| CN1595059A (en) * | 2004-06-23 | 2005-03-16 | 中国科学院地质与地球物理研究所 | Transducer for rock mass project model internal ultrasonic testing |
| CN101121165A (en) * | 2007-09-04 | 2008-02-13 | 浙江师范大学 | Piezoelectric ultrasonic transducer |
| CN201810297U (en) * | 2010-09-10 | 2011-04-27 | 北京锐致聪科技有限公司 | Tangentially polarized monopole transducer of multi-pole acoustic array logging |
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