CN201810297U - Tangentially polarized monopole transducer of multi-pole acoustic array logging - Google Patents
Tangentially polarized monopole transducer of multi-pole acoustic array logging Download PDFInfo
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- CN201810297U CN201810297U CN201020527497XU CN201020527497U CN201810297U CN 201810297 U CN201810297 U CN 201810297U CN 201020527497X U CN201020527497X U CN 201020527497XU CN 201020527497 U CN201020527497 U CN 201020527497U CN 201810297 U CN201810297 U CN 201810297U
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Abstract
The utility model relates to a tangentially polarized monopole transducer of multi-pole acoustic array logging, wherein the transducer comprises a binding post (1), an insulator (2), a mandrel (3), an upper end cover (4), a terminal pad (5), an insulation mandrel (6), a lower end cover (8), a nut (8), an electrode lead (10) and a bolt (11); the tangentially polarized monopole transducer of multi-pole acoustic array logging provided by the utility model is characterized in that the transducer further comprises a spliced ceramic tube (7), the spliced ceramic tube (7) is obtained by a plurality of fan-shaped tangentially polarized piezoelectricity ceramic pieces which are spliced by using a high-temperature adhesive, the two bevel edge surfaces of the fan-shaped tangentially polarized piezoelectricity ceramic piece are coated with a sliver layer and the outer layer of the spliced ceramic tube (7) is wound and poured by using high-temperature adhesive and glass fibre. The tangentially polarized monopole transducer of multi-pole acoustic array logging provided by the utility model has the advantages that the large emission power and emission efficiency can be obtained in low frequency by using a tangentially polarized spliced ceramic tube, the receiving sensitivity is improved and the stability is reliable.
Description
Technical field
The utility model relates to the logger technical field, and particularly, the utility model relates to a kind of shear-polarization monopole transducer that is used for MAC.
Background technology
In recent years, along with going deep into of geology and oil exploration, also more and more higher to the expectation and the requirement of logger, acoustic logging is one of important method of oil well logging.The acoustic logging that adopts is to utilize transmitting transducer to send sound wave in the down-hole at present, propagates in underground medium, after the certain hour decay, is accepted transducer and accepts, and by the acoustic signals analysis to decay, judges underground relevant geologic structure.Acoustic wave transducer comprises monopole acoustic wave transducer and dipole acoustic transducer etc., and what the monopole soic wave transmitting energy converter excited mainly is the compressional wave signal, and what the dipole acoustic transmitting transducer excited mainly is the shear wave signal.Usually the acoustic logging instrument that adopts is the conventional acoustic logging instrument of monopole sound source now, its shortcoming is directly to extract the shear wave parameter, in cased well, the compressional wave parameter also is difficult to obtain, therefore, seem very weak in the judgement for soft formation parameter very important in oil exploration.In order to overcome the defective of this conventional acoustic logging instrument, or the dipole acoustic of increasing transducer arranged on original instrument, shear wave parameter in, the hard formation soft with direct extraction, tranmitting frequency height, the loss of original monopole transducer are big, sensitivity is low but this kind way is confined to, can't obtain Permeability Parameters accurately, and Permeability Parameters to ask for be the important topic that oil well logging faces all the time, it is accurately asked in that to estimate on oil production rate and the reserves meaning very great.The structure of old conventional instrument also can't realize multiple logging mode in addition.Such as, cement bond log is a method commonly used in the oil well logging, be mainly used to measure the bonding quality of cement grouting behind the oil well setting of casing, this method measuring principle and one pole metering system are similar, but it is longer that spacing (distance between transmitter and the receiver) requires, therefore, changing instrument with regard to needs during the cement bond logging well just can carry out.
In order to launch more low-frequency compressional wave, reservoir permeability is asked in Stoneley wave speed and decay in the utilization sound acoustic wave train logging, and can realize multiple logging mode, China's utility model 03261891.3 has proposed a kind of " multipole array sonic log transducer ", utilize monopole, dipole and Stoneley wave transducer to form multi-polar sound source, can directly measure compressional wave, shear wave, the Stoneley wave parameter on stratum, both can be mutually with reference to checking, also can handle separately, improve the confidence level and the range of application of instrument greatly.What monopole transmitting transducer in this utility model and monopole receiving transducer adopted is the piezoelectric ceramic tube of radial polarised, and between wall thickness 1～5mm, the pipe inside and outside wall is silver coated, is used for welding electrode.The transducer receiving sensitivity of this structure is higher, because the characteristic of piezoelectric ceramics, the electrode both sides add in the same way, and voltage can compress, adding backward voltage can stretch, the tensile strength of piezoelectric ceramics self is limited, too high backward voltage can make himself cracking, and this has just determined that the monomer earthenware can't apply too big voltage, also just is difficult to obtain bigger transmitting power.The way of making the monomer earthenware at present is to suppress heavy wall cast stock earlier, passes through the mechanical lapping inside and outside circle then, obtains the earthenware of thin-walled, and earthenware is very easy to break in mechanical processing process, and yield rate is lower, and this has just increased cost of manufacture.Technological requirement is also very strict in the process of radial polarised, and the cracked and defective that causes because of polarization also happens occasionally.Use the making and the use of the transducer of this monomer earthenware also to need exactissima diligentia, installation and transportation are all very inconvenient.In subsurface environment, the reason of Yin Wendu and pressure, earthenware easily breaks.Electrode pad on the inside and outside wall also comes off easily.For bigger transmitting power can be provided, has higher receiving sensitivity simultaneously, can adopt and cut apart electric pole type annular earthenware and replace the radial polarised piezoelectric ceramic tube, how the technical difficulty of this structure is extraction electrode, among the United States Patent (USP) NO.3142032, what adopt is metal forming or net, sticks between the electrode of per two amalgamation assemblies splicing, utilizes the part welding electrode that extends out in the sticking seam of metal sandwich.But the equipment complex process, along with increasing of piece, the effective electro-mechanical couple factor of oscillator descends; Metal sandwich is different with the coefficient of thermal expansion of piezoelectric ceramics, therefore is easy to generate stress cracking.China utility model CN85201622 has proposed a kind of electrode lead-out mode that does not have metal sandwich, by with the local way extraction electrode that exposes of the silver coating of piezoelectric ceramics bar, thereby simplified assembly technology, improved yield rate, improve electromechanical coupling characteristics, possessed more stable electric property simultaneously.The time ratio that this utility model proposes early, this method can only be made the transducer of big (diameter is greater than 30 centimetres) of volume, Zhi Bei transducer can only be applied in its volume not required the field by this method, so be confined under water low-frequency high-power transmitter, acoustic release instruction sound source and ignite experiment field, ocean such as acoustic apparatus under water.Utility model CN85201622 is from the volume size or technical scheme has determined that all its range of application can only be the deep water marine field, and the technical requirements of discontented fully sufficient sound wave well logging transducer, acoustic logging is as one and diverse field, deep water ocean, requirement to transducer is also harsh more, acoustic logging requires size less relatively (in 10 centimetres of the diameters) with transducer, amount ratio is bigger, cost requirement is lower, therefore the utility model is gone up by further improving on this basis again, prepares the transducer that is applicable to the well logging field.
The utility model content
The purpose of this utility model has been to provide a kind of shear-polarization monopole transducer that is used for MAC, successful solution the problem that the monopole transducer exists in the existing MAC.
The shear-polarization monopole transducer that is used for MAC that provides of the present utility model comprises: prap 1, insulator 2, mandrel 3, upper end cover 4, terminal pad 5, insulation mandrel 6, splicing earthenware 7, bottom end cover 8, nut 9, contact conductor 10, screw 11;
Described transducer comprises that also splicing earthenware 7 is the shear-polarization piezoelectric ceramic piece, end face is fan-shaped, silver coated on two fan-shaped hypotenuse faces, by the bonding one-tenth annular of high-temp glue, use high-temp glue and glass fiber to twine cast, radially apply with prestressing force, radially apply with prestressing force at it at it, under the situation of low frequency large amplitude, be difficult for broken; The electrode of splicing earthenware 7 is by the local mode that exposes of the silver coating of piezoelectric ceramics bar is drawn.
As a kind of improvement of such scheme, described terminal pad 5, insulation mandrel 6, insulator 2 are poly-PTFE or other high-temperature insulation materials; Upper end cover 4, bottom end cover 8, mandrel 3, nut 9, screw 11 are stainless steel material.
Another improvement as such scheme is characterized in that, described prap 1 is silver-plated metal material, especially uses the silver-plated material of fine copper.
As another improvement of such scheme, described contact conductor 10 is a high temperature resistant wire, and its skin has the polytetrafluoroethylene (PTFE) cladding, and heart yearn is the silver-plated wire of multiply.
As also a kind of improvement of such scheme, described shear-polarization piezoelectric ceramic piece is an exotic material, and its curie point is higher than 375 ℃.
Advantage of the present utility model is: a kind of shear-polarization monopole transducer that is used for MAC that the utility model provides, by adopting shear-polarization splicing earthenware to substitute conventional radial polarised earthenware, can obtain bigger transmitting power when making low frequency, and emission effciency, have very high receiving sensitivity simultaneously, to have electric property reliable and stable for this structure transducer simultaneously, the firm difficult drop-off of electrode pads, earthenware is difficult for broken, characteristics such as high temperature high voltage resistant.
Description of drawings
Fig. 1 transducer sectional drawing of the present utility model;
The structure chart of Fig. 2 earthenware of the present utility model.
The accompanying drawing sign
1, prap 2, insulator 3, mandrel
4, upper end cover 5, terminal pad 6, insulation mandrel
7, splicing earthenware 8, bottom end cover 9, nut
10, contact conductor 11, screw 12, ceramic bar
13, extraction electrode
The specific embodiment
Below in conjunction with the drawings and specific embodiments, structure of the present utility model is described in more detail.
As shown in Figure 1, transducer of the present utility model comprises: prap 1, insulator 2, mandrel 3, upper end cover 4, terminal pad 5, insulation mandrel 6, splicing earthenware 7, bottom end cover 8, nut 9, contact conductor 10, screw 11; Transducer comprises that also splicing earthenware 7 is the shear-polarization piezoelectric ceramic piece in addition, end face is fan-shaped, silver coated on two fan-shaped hypotenuse faces, by the bonding one-tenth annular of high-temp glue, use high-temp glue and glass fiber to twine cast, radially apply with prestressing force, radially apply with prestressing force at it at it, under the situation of low frequency large amplitude, be difficult for broken; The electrode of splicing earthenware 7 is by the local mode that exposes of the silver coating of piezoelectric ceramics bar is drawn;
Wherein, splicing earthenware 7 two ends coaxial cooperation terminal pads 5, be installed between upper end cover 4 and the bottom end cover 8, mandrel 3 one ends have ring-like youngster, are used for and upper end cover 4 coaxial cooperation, and mandrel 3 outer walls are sliding combined with insulation mandrel 6, realize fixing by screw 11, mandrel 3 other ends have screw thread, by nut 9, will splice earthenware 7 and be fixed and clamped.Contact conductor 10 passes the through hole on the upper end cover, is separately fixed on the prap 1, and prap 1 is installed on the insulator 2.
The extraction electrode 13 that splices earthenware 7 as shown in Figure 2 is by the local mode that exposes of the silver coating of piezoelectric ceramics bar 12 is drawn.
It should be noted last that above embodiment is only unrestricted in order to the explanation the technical solution of the utility model.Although the utility model is had been described in detail with reference to embodiment, those of ordinary skill in the art is to be understood that, the technical solution of the utility model is made amendment or is equal to replacement, the spirit and scope that do not break away from technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (6)
1. a shear-polarization monopole transducer that is used for MAC comprises: 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 splicing earthenware (7);
Described splicing earthenware (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 hypotenuse faces of described fan-shaped shear-polarization piezoelectric ceramic piece, outer high-temp glue and the glass fiber of using of splicing earthenware (7) twines cast.
2. the shear-polarization monopole transducer that is used for MAC according to claim 1 is characterized in that, described terminal pad (5), insulation mandrel (6), insulator (2) are made for high-temperature insulation material, comprise poly-PTFE.
3. the shear-polarization monopole transducer that is used for MAC according to claim 1 is characterized in that described prap (1) is silver-plated metal material.
4. the shear-polarization monopole transducer that is used for MAC according to claim 1 is characterized in that described contact conductor (10) is a high temperature resistant wire, and its skin has the polytetrafluoroethylene (PTFE) cladding, and heart yearn is the silver-plated wire of multiply.
5. the shear-polarization monopole transducer that is used for MAC according to claim 1 is characterized in that described shear-polarization piezoelectric ceramic piece is an exotic material, and its curie point is higher than 375 ℃.
6. the shear-polarization monopole transducer that is used for MAC according to claim 1 is characterized in that, the electrode of described splicing earthenware (7) is by the local mode that exposes of the silver coating of piezoelectric ceramics bar is drawn.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020527497XU CN201810297U (en) | 2010-09-10 | 2010-09-10 | Tangentially polarized monopole transducer of multi-pole acoustic array logging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020527497XU CN201810297U (en) | 2010-09-10 | 2010-09-10 | Tangentially polarized monopole transducer of multi-pole acoustic array logging |
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| Publication Number | Publication Date |
|---|---|
| CN201810297U true CN201810297U (en) | 2011-04-27 |
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| CN201020527497XU Expired - Fee Related CN201810297U (en) | 2010-09-10 | 2010-09-10 | Tangentially polarized monopole transducer of multi-pole acoustic array logging |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102400679A (en) * | 2010-09-10 | 2012-04-04 | 北京锐致聪科技有限公司 | Tangential polarization monopole energy converter applicable to multi-level array sound wave well logging |
| CN105626033A (en) * | 2014-10-29 | 2016-06-01 | 中国石油集团长城钻探工程有限公司 | Lateral electrode assembly for petroleum logging instrument and manufacturing method for lateral electrode assembly |
| CN106842330A (en) * | 2017-01-17 | 2017-06-13 | 陕西师范大学 | Small size low-frequency transducer and oil pipe acoustic logging system and method excessively based on this |
| CN108343427A (en) * | 2018-04-24 | 2018-07-31 | 杭州丰禾石油科技有限公司 | Logging while drilling apparatus mandrel |
| CN108962208A (en) * | 2018-09-01 | 2018-12-07 | 哈尔滨工程大学 | A kind of three lobed flextensional transducers of conformal driving |
-
2010
- 2010-09-10 CN CN201020527497XU patent/CN201810297U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102400679A (en) * | 2010-09-10 | 2012-04-04 | 北京锐致聪科技有限公司 | Tangential polarization monopole energy converter applicable to multi-level array sound wave well logging |
| CN102400679B (en) * | 2010-09-10 | 2015-05-13 | 北京锐致聪科技有限公司 | Tangential polarization monopole energy converter applicable to multi-level array sound wave well logging |
| CN105626033A (en) * | 2014-10-29 | 2016-06-01 | 中国石油集团长城钻探工程有限公司 | Lateral electrode assembly for petroleum logging instrument and manufacturing method for lateral electrode assembly |
| CN106842330A (en) * | 2017-01-17 | 2017-06-13 | 陕西师范大学 | Small size low-frequency transducer and oil pipe acoustic logging system and method excessively based on this |
| CN108343427A (en) * | 2018-04-24 | 2018-07-31 | 杭州丰禾石油科技有限公司 | Logging while drilling apparatus mandrel |
| CN108962208A (en) * | 2018-09-01 | 2018-12-07 | 哈尔滨工程大学 | A kind of three lobed flextensional transducers of conformal driving |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110427 Termination date: 20170910 |
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| CF01 | Termination of patent right due to non-payment of annual fee |