CN102881280A - Passive suppressing method for downhole noise and echo for sound transmission technology of drill string - Google Patents
Passive suppressing method for downhole noise and echo for sound transmission technology of drill string Download PDFInfo
- Publication number
- CN102881280A CN102881280A CN2012103455974A CN201210345597A CN102881280A CN 102881280 A CN102881280 A CN 102881280A CN 2012103455974 A CN2012103455974 A CN 2012103455974A CN 201210345597 A CN201210345597 A CN 201210345597A CN 102881280 A CN102881280 A CN 102881280A
- Authority
- CN
- China
- Prior art keywords
- sound
- noise
- sound insulator
- insulator
- single structure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The invention relates to a passive suppressing method for downhole noise and echo for sound transmission technology of a drill string, which belongs to the technical field of downhole data transmission in the drilling process and solves the problems that the acoustic signal transmission performance of the drill string is reduced due to low-frequency noise and echo caused by the downhole noise, the discontinuous structure of the drill string and the like in the prior art. Based on the spectral response characteristics of a comb filter of a periodic pipe structure, the method utilizes a sound insulator structure with a periodic groove to realize the passive isolation and suppression of the upstream noise and echo in the drill string at certain frequency band, so that the signal to noise ratio for receiving signals can be improved, the transmission rate is improved, the well logging cycle is shortened, and drilling cost is saved. Moreover, the method has the characteristics of higher low-frequency sound insulation band width and simple structure.
Description
Technical field
The invention belongs to the technical field of the downhole data transmission in the drilling process, be specifically related to a kind of down-hole noise for drill string sound transmission technology and the passive inhibition method of echo, be used for effectively suppressing that up down-hole noise and echo from the drill string bottom disturbs impact on sound transmission signal receiving performance in the well logging while drilling drill string channel.
Background technology
A kind of new method of instead traditional wireline logging, the down-hole information transmission technology in the well logging while drilling has become international study hotspot.Extensively there is the very low shortcoming of transfer rate in the mud pulse technology of commercialization at present, only is 10bit/s generally, and its signal to noise ratio (S/N ratio) more is subject to having a strong impact on of drilling fluid and on-the-spot noise.Therefore, as a kind of selectable down-hole high speed data transfer mode, the sonic transmissions technology has at home and abroad obtained paying close attention to widely in recent years.
The sonic transmissions technology is to utilize sound wave to come signal transmission through the drill string channel, the test process of downhole data is that testing tool and sound wave wireless transmission emission coefficient are lowered to drill string or oil well pump, testing tool is converted into numerical information with various downhole parameters, then encode, keep in, control circuit is delivered in the binary code pulse that represents downhole parameters, the emission acoustic vibration signal, arrive ground along drill string or tubing transmission, the sound wave receiving transducer that is installed in well head receives, after amplifying, send into storage medium recordedly, carry out data process and interpretation.It is few that the sonic transmissions mode has an early investment, the advantage that transfer rate is relatively high.And, because the transfer rate of sound wave in Steel material be up to 5000m/s, in the petroleum drilling the continuous steel drill string in down-hole more the down-hole information high-speed transfer of sound wave condition is provided.But in actual production process, the different logging instrumentations in the drill column structure and the inhomogeneous sound transmission performance that also has a strong impact on of acoustic impedance that causes.Simultaneously, drilling process also can produce a large amount of noises, and it can make the simulating signal distortion, and digital signal is made a mistake, and causes the degradation of drill string transmission channel, and finally affects the reception of sound transmission signal.The noise that produces in the drilling process mainly comprises surface noise and down-hole noise, and wherein, the down-hole noise is that drill bit is directly coupled on the drill string by bottom drill tool, and larger on up transmission signal quality impact, has a strong impact on the sonic data transmission performance.These noises can change along with the variation of drilling parameter, and the height of noise will affect signal to noise ratio (S/N ratio), and cause the transmittability of channel to change.Transmitting of same power adopted in the engineering research discovery, and when noise was more serious, signal to noise ratio (S/N ratio) will be less than 1dB, and other situations are then greater than 4dB.Therefore, for improving the transmittability of channel, must improve signal to noise ratio (S/N ratio).
Aspect the research of boring the sonic transmissions technology, Thomas G.Banres in 1972 and Bill R.Kirkwood have proposed logical stopband and have replaced the comb filter architectural characteristic (referring to Barnes, T.G, and Kirkwood, B.R.Passbands for acoustic transmission in an idealized drill string[J] .Journal of the Acoustic Society of America, 1972,51:1006-1008.).Since 1985, Drumheller and Poletto make progress at sound remote measurement theoretical side, analyzed compressional wave along the frequency bandwidth characteristics of desirable drilling rod, the inside and outside equivalent-simplification loss of trickle spectrum structure, drilling rod physical dimension and pipe in the passband on the impact of transmission, set up the theoretical model of describing sound transmission passage (referring to Douglas S.Drumheller.Attenuation of sound waves in drill strings[J] .Journal of the Acoustic Society of America, 1993,94 (4): 2387-2396.).Halliburton (Halliburton) company in nineteen ninety-five released compensation long space acoustic logging while drilling instrument (referring to Wang Hua, the fruit of making pottery, Zhang Xujian. acoustic logging while drilling progress [J]. logging technology, 2009,33 (3): 197-203.).
Inhibition for down-hole noise and echo thereof, consider that the acoustic signals that sends from pinger can and take the lead in being received by the receiver along the drill collar propagation, the acoustic signals that causes receiving is mainly the drill collar ripple that does not carry formation information, and people seek the method that can reduce the drill collar direct wave when exploitation acoustic logging while drilling instrument.Calendar year 2001 Leggett utilization mode of cut-in groove on drill collar increases the drill collar wave attenuation to reach the sound insulation purpose, this structure can obtain the acoustic attenuation (referring to James V.Leggett.Field test results demonstrating improved real-time data quality in an advanced LWD acoustic system[J] .SPE71732,2001) of 40dB.The Shah(of Halliburton company in 2007 is referring to Shah V.V., Linyaev.Low frequency acoustic attenuator for use in down hole applications[P] .USA:US7210555,2007) etc. the people also receives for acoustical signal in the acoustic logging while drilling, has applied for being used for the sound insulator patent of acoustic logging while drilling.Domesticly some theoretical researches have also been carried out in this regard.Yang Yongs in 2009 etc. utilize the Finite Difference-Time Domain separating method to carrying out numerical simulation study (referring to Yang Yong with boring the sound insulator defening effect, Che Xiaohua, Li Jun etc. based on the numerical simulation [J] of the acoustic logging while drilling instrument sound insulator defening effect of Finite-Difference Time-Domain Method. China University Of Petroleum Beijing's journal (natural science edition), 2009,33 (3): 66-70), a kind of method that makes up sound insulator in drill collar cutting periodicity rotational symmetry groove mode was proposed in 2010, with the impact of eliminating the drill collar mode wave (referring to Yan Xianghong, Su Yuanda, Sun Jianmeng, Deng. periodicity rotational symmetry groove structure sound insulation characteristics numerical simulation [J]. computational physics, 2010,27(6): 869-875).But the sound insulator structure of above-mentioned proposition is mainly used in acoustic logging, namely by eliminating in the acoustic logging while drilling drill collar mode wave to detect the stratum compressional wave, and concrete structure and the analysis of Influential Factors thereof of part Study not clear and definite down-hole practical application, also be different from the communication of well logging while drilling sound wave in this patent to the testing requirement of compressional wave in the drill string or stress wave, but relevant solution thinking is provided.And, because drill string channel major part is periodically combined by drilling rod and pipe collar, has the comb filter architectural characteristic, and drilling rod and pipe collar junction can produce stronger non-directional multiple reflection echo, and down-hole noise and echo thereof in the research drill string sonic transmissions suppress significant and using value.
Summary of the invention
The objective of the invention is provides a kind of down-hole noise for drill string sound transmission technology and echo inhibition method for overcoming the problem of above-mentioned prior art existence of present stage.The method utilization has the periodically combination sound insulator structure of groove, by planform and the size of design sound insulator, the sound insulator pipe nipple with different sound insulation centre frequencies is made up, and realizes the passive inhibition of up down-hole noise and reflection echo.The method helps effective extraction of down-hole sound transmission signal, improves signal to noise ratio (S/N ratio).
The technical scheme that the present invention proposes is: a kind of down-hole noise and the passive inhibition method of echo for drill string sound transmission technology, the method comprises the steps:
Since the groove structure that the single structure sound insulator makes near the noise a certain centre frequency reach the optimized attenuation effect is groove width and separation equal this frequency place wavelength 1/4, that is:
In the formula, L
1Axial length for groove; L
2Distance between two grooves; λ is the wavelength of sound transmission carrier wave in the channel;
Then the single structure sound insulator has periodically groove, the equal in length of the groove of the periodicity groove of this single structure sound insulator and projection (part between adjacent notches), and the inside and outside footpath of groove is consistent with the inside and outside footpath of drilling rod, and the inside and outside footpath of projection is consistent with the inside and outside footpath of pipe collar; Groove is relevant with the stopband center frequency of suppressed noise with the length of projection, is determined by formula (1);
Step 2, when up drill string vibrating bottom noise is stronger, the sound insulation frequency band of single structure sound insulator will narrow down, and cause carrying out reliably squelch; The narrower deficiency of sound insulation frequency band for the single structure sound insulator exists according to noise spectrum feature in down-hole in the actual transmission channel, is divided into low-frequency range, Mid Frequency and high band relatively with the noise spectrum scope; For different noise band limits, single structure sound insulator by the corresponding frequency band scope is threaded successively and forms the unitized construction sound insulator, its medium and low frequency suppresses the single structure sound insulator and links to each other with the bottom drill collar, and HF reject single structure sound insulator links to each other with the transmission pipe nipple that acoustic transmitter is installed; Single structure sound insulator size in the unitized construction sound insulator can be decided according to concrete carrier frequency, for optimizing sound insulation property, on the size Selection of each single structure sound insulator pipe nipple, need follow following principle: the logical stopband of each adjacent single structure sound insulator is intersected, namely, the passband of a certain single structure sound insulator is adjacent overlapping or most of intersecting of the stopband of single structure sound insulator, to obtain whole wider rejection band bandwidth, thereby can farthest isolate from the impact on sound transmission signal of the upstream noise of bottom drill bit, can reduce echo simultaneously and disturb.
Further, the material that changes single structure sound insulator itself can be adjusted the sound insulator structure and optimize sound insulation property.
Further, the physical dimension of change single structure sound insulator (as, periodically the groove of groove is unequal with the length of projection) or shape facility, capable of regulating or optimization sound insulation property.
Further, utilize the high strength packing material that the groove structure of single structure sound insulator is filled, capable of regulating or optimization single structure sound insulation property.
Further, sound insulator is positioned at the top of bottom drill collar, and λ/4 places, acoustic transmitter below, and wherein, λ is the wavelength of sound transmission carrier wave in the channel.
The cardinal principle of technical scheme of the present invention is:
The present invention is based on the transport property of low frequency compressional wave in acoustic impedance sudden change place and periodicity tubular construction channel, namely, reflection does not occur and causes the transmitted wave signal intensity attenuation in the place of coupling in acoustic impedance in sound wave, and periodically the tubular construction channel has the comb filter spectral response characteristic that logical stopband replaces simultaneously.Disturb for down-hole noise up in the drill string and echo thereof, design has the periodically combination sound insulator structure of groove, by changing the shape and size capable of regulating sound insulation center frequency-band of sound insulator structure, and it is installed in drill collar top, and λ/4 places, acoustic transmitter below, wherein, λ is the wavelength of sound transmission carrier wave in the channel, realize the passive inhibition of up down-hole noise and reflection echo, extract useful down-hole pumping signal.
The present invention compares characteristics specific as follows and technique effect with prior art:
1, the present invention uses the sound insulator structure to realize the passive inhibition of down-hole noise and echo, has characteristics simple in structure.
2, the present invention can overcome the multipath reflection sound wave in the periodicity channel architecture by the acoustic impedance design of sound insulator structure, helps the unidirectional echo consistent with the useful signal direction of propagation suppressed.
3, the inside and outside footpath of the sound insulator groove among the present invention and projection is consistent with the inside and outside footpath of drilling rod and pipe collar respectively, has to make and connect easily characteristics.
4, the shape of the present invention by changing the sound insulator structure, size, material etc., capable of regulating or optimize the sound insulation property of whole transmission channel.
5, the combination sound insulator among the present invention is made of the single structure sound insulator pipe nipple of some structure relative compact, can adjust neatly and make up single structure sound insulator pipe nipple according to spectral characteristics of noise in the channel.
6, the sound insulator among the present invention is positioned at the drill collar top, and λ/4 places, acoustic transmitter below, and wherein, λ is the wavelength of sound transmission carrier wave in the channel.
7, the present invention can be used for well logging while drilling or production logging, realizes by improving the signal to noise ratio (S/N ratio) that receives signal, improving transfer rate, thereby shortening the well logging cycle being the optimization of the acoustical signal transmission performance of channel based on drill string or oil pipe, saves drilling cost.
Description of drawings
Fig. 1 is the structural representation of the single structure sound insulator of design;
Fig. 2 is with L
1=L
2=1.28m, 0.64m and 0.32m are example, the different frequency response curve of sound insulator shown in Figure 1;
Fig. 3 is with L
1=L
2=1.28m, 0.64m and 0.32m are example, the oise insulation factor change curve of sound insulator shown in Figure 1;
Fig. 4 is the structural representation of the unitized construction sound insulator of design;
Fig. 5 is with L
1=L
2=1.28m, 0.64m and 0.32m are example, frequency response and the oise insulation factor change curve of the combination sound insulator that three single structure sound insulator pipe nipples of respectively design are consisted of in mode shown in Figure 4;
Fig. 6 be sound insulator the installation site and and the down-hole acoustic transmitter between the relative position schematic diagram;
Fig. 7 for the periodicity drill string channel that forms take " 10 drilling rod-9 pipe collars " as example, the whole sound insulation property of the single structure sound insulator of design;
Fig. 8 for the periodicity drill string channel that forms take " 10 drilling rod-9 pipe collars " as example, the whole sound insulation property of the unitized construction sound insulator of design and single structure sound insulator contrasts.
Embodiment
Now be elaborated as follows in conjunction with each drawings and Examples: the invention provides a kind of down-hole noise for drill string sound transmission technology and the passive inhibition method of echo, the method is a kind of for the down-hole noise of drill string sound transmission technology and the sound insulator structure of echo inhibition by design, realized the up passive inhibition of disturbing from down-hole noise and the echo of drill string bottom in the drill string channel is improved sound transmission signal receiving performance.The concrete steps of the method are as follows:
The design of step 1. single structure sound insulator
Since the groove structure that sound insulator makes near the noise a certain centre frequency reach the optimized attenuation effect is groove width and separation approximate this frequency place wavelength 1/4, that is:
In the formula, L
1Axial length for groove; L
2Distance between two grooves; λ is wavelength.
Based on said method, designed the single structure sound insulator with periodicity groove as shown in Figure 1.The equal in length of this groove and projection (part between adjacent notches), and the inside and outside footpath of groove is consistent with the inside and outside footpath of drilling rod, and the inside and outside footpath of projection is consistent with the inside and outside footpath of drilling rod pipe collar.Groove is relevant with the stopband center frequency of suppressed noise with the length of projection, can be determined by formula (1).
The design of step 2. unitized construction sound insulator
The narrower deficiency of sound insulation frequency band for the single structure sound insulator exists can according to noise spectrum feature in down-hole in the actual transmission channel, be divided into low-frequency range, Mid Frequency and high band with the noise spectrum scope relatively.For different noise band limits, be threaded successively by the specific single structure sound insulator of difference pipe nipple and form the unitized construction sound insulator, its medium and low frequency suppresses pipe nipple and can link to each other with the bottom drill collar, and the HF reject pipe nipple can link to each other with the transmission pipe nipple that acoustic transmitter is installed.Single structure sound insulator pipe nipple size in the unitized construction sound insulator can be decided according to concrete carrier frequency.
For optimizing sound insulation property, on the size Selection of each single structure sound insulator pipe nipple, need follow following principle: the logical stopband of each adjacent single structure sound insulator is intersected, namely, the passband of a certain single structure sound insulator is adjacent overlapping or most of intersecting of the stopband of single structure sound insulator, to obtain whole wider rejection band bandwidth, thereby can farthest isolate from the impact on sound transmission signal of the upstream noise of bottom drill bit, can reduce echo simultaneously and disturb.
Verify as follows by the simulation analysis that echo noise suppresses to technique effect of the present invention:
According to the propagation principle of sound wave in drill string, in the simulation process of setting forth hereinafter, based on the wave equation of one dimension compressional wave in the drill string, utilize finite-difference algorithm that the drill string channel is subdivided into some quality infinitesimals, then wave equation can be rewritten as:
In the formula,
Expression j is x constantly
nPlace's particle displacement, Δ r
nExpression x
nPlace's elementary mass.Therefore, utilize this formula (2) can find the solution the single structure sound insulator of design and the Frequency Response of unitized construction sound insulator; And the Vibration Condition that obtains diverse location place quality infinitesimal in the drill string channel, thereby obtain the transient oscillation rule of different incentive condition lower drills, realize the transmission course of acoustical signal in the drill string channel.
For sound insulator structure shown in Figure 1, the periodic structure that consists of take " 3 projections-3 groove " is as example, as groove L
1With protruding L
2Width equate, and when being successively 1.28m, 0.64m and 0.32m respectively, the frequency response characteristic of corresponding different single structure sound insulators as shown in Figure 2, then corresponding the first sound insulation frequency band is about respectively 1kHz, 2kHz and 4kHz, thereby has verified the characteristic that changes periodicity groove structure capable of regulating channel sound insulation frequency band.
In sound insulator design, the oise insulation factor parameter is used for weighing the sound insulator sound insulation property, and it refers to that the amplitude of a certain radio-frequency component of a certain oscillating component is through the damping capacity behind the sound insulator.If the damping capacity α of sound insulator, then:
In the formula, f is frequency of sound wave, A (f) for sound wave through the sound wave amplitude after the sound insulator decay, A
o(f) for launching the amplitude of sound wave.Because transmission coefficient t=A (f)/A
o(f), then oise insulation factor also can be expressed as 20lg (1/T).
The periodic structure that consists of take " 3 projections-3 groove " is as example, as groove L
1With protruding L
2Width equate, and when being successively 1.28m, 0.64m and 0.32m respectively, frequency response characteristic for different single structure sound insulators shown in Figure 2, Fig. 3 shows the oise insulation factor change curve of corresponding sound insulator structure, then oise insulation factor can reach 80dB, thereby realizes the establishment of low frequency stopband range internal vibration noise.
Simultaneously, for ease of increasing the sound insulation frequency band range of sound insulator, promote noise suppression effect, on the basis of single structure sound insulator, designed unitized construction sound insulator as shown in Figure 4.The sound insulation frequency band of this unitized construction sound insulator can be divided into three frequency bands, is taken as successively low-frequency range, Mid Frequency and high band.Each sound insulation frequency band is by the realization of single structure sound insulator, and its concrete physical dimension is decided according to the first sound insulation stopband center frequency.For optimizing sound insulation property, on the size Selection of each single structure sound insulator pipe nipple, need follow following principle: the logical stopband of each adjacent sound insulator pipe nipple is intersected, namely, the passband of a certain pipe nipple is adjacent overlapping or most of intersecting of the stopband of pipe nipple, to obtain whole wider rejection band bandwidth, thereby can farthest isolate from the impact on sound transmission signal of the upstream noise of drill string bottom, can reduce echo simultaneously and disturb.
For unitized construction sound insulator shown in Figure 4, with L
1=L
2=1.28m, 0.64m and 0.32m are example, three single structure sound insulator pipe nipples of respectively design are threaded successively consist of the combination sound insulator, wherein, each single structure sound insulator structure as shown in Figure 1, then the frequency response of unitized construction sound insulator and oise insulation factor change curve are as shown in Figure 5.
Be checking single structure sound insulator and the defening effect of unitized construction sound insulator in the drill string acoustic transmission system, sound insulator is accessed drill string sound transmission channel with illustrated position shown in Figure 6, the periodicity drill string that forms take " 10 drilling rod-9 pipe collars " has carried out the whole sound insulation property emulation of sound insulator in the drill string channel as example.Wherein, the simulation architecture parameter of drilling rod and pipe collar is as shown in table 1.
The simulation architecture parameter of table 1 drill string
| Length (m) | Density (kg/m 3) | Cross-sectional area (cm 2) | Elastic modulus/Pa | |
| Drilling rod | 8.6868 | 7870 | 24.52 | 2.08×10 11 |
| Pipe collar | 0.4572 | 7870 | 129.0 | 2.08×10 11 |
Getting the voice carrier frequency is 1.5kHz, applies continuous unit continuation sinusoidal in the acoustic transmitter position, and applies in drill string bottom that average is 0, variance is the white Gaussian noise signal of 2 units.For improving the receiving intensity of sound transmission signal, the center stopband of sound insulator is determined near 1.5kHz, then can calculate that according to formula (1) groove of single structure sound insulator and bump sizes are: L
1=L
2=0.855m.For analyzing sound insulator to the inhibition of noise, adopt the Welch method to calculate the power spectrum density that receives signal here.Fig. 7 shows when being applied with up white Gaussian noise in the drill string bottom, and the single structure sound insulator of design is to the whole sound insulation property curve of periodicity drill string channel.Hence one can see that, and in 0 ~ 8kHz frequency range, the noise level of reception signal all is starkly lower than the situation without sound insulator when using sound insulator, generally low 10 ~ 30dB; And at the sound transmission useful signal frequency place of 1.5kHz, when using sound insulator, receive the signal to noise ratio (S/N ratio) of signal also apparently higher than the situation without sound insulator.Simulation result shows, the use of sound insulator can obviously suppress up vibration noise and echo to be disturbed, and improves signal to noise ratio (S/N ratio).
When up drill string vibrating bottom noise is stronger, the sound insulation frequency band of single structure sound insulator will narrow down, and cause carrying out reliably squelch.As shown in Figure 8, be 0 when applying average in drill string bottom, when variance is the white Gaussian noise signal of 8 units, for the single structure sound insulator, in 0 ~ 8kHz frequency band range, noise level is substantially about 10dB in its reception signal, at the component frequency place even surpass 20dB, this shows, the noise isolation effect of single structure sound insulator will be under some influence when noise is stronger.For the problems referred to above, use unitized construction sound insulator shown in Figure 4, it is threaded connection by three single structure sound insulator pipe nipples and consists of the groove L of each single structure sound insulator
1With protruding L
2All equate, and be taken as successively 1.28m, 0.64m and 0.32m.As shown in Figure 8, for the unitized construction sound insulator, the noise level that in 0 ~ 8kHz frequency band range, receives signal generally-below the 10dB, the background vibration noise has obtained suppressing well, and the signal to noise ratio (S/N ratio) that receives signal in sound transmission signal frequency 1.5kHz position is also obviously strengthened.Simulation result shows, with respect to the single structure sound insulator, the unitized construction sound insulator can be used in the drill string sound transmission technology having better whole sound insulation property than the strong vibration squelch.
Claims (5)
1. down-hole noise and passive inhibition method of echo that is used for drill string sound transmission technology, it is characterized in that: the method comprises the steps:
Step 1, utilize the single structure sound insulator that down-hole noise and echo in the drill string sound transmission technology are suppressed; Wherein,
Since the groove structure that the single structure sound insulator makes near the noise a certain centre frequency reach the optimized attenuation effect is groove width and separation equal this frequency place wavelength 1/4, that is:
In the formula, L
1Axial length for groove; L
2Distance between two grooves; λ is the wavelength of sound transmission carrier wave in the channel;
Then the single structure sound insulator has periodically groove, the equal in length of the groove of the periodicity groove of this single structure sound insulator and projection, this projection is the part between adjacent notches, and the inside and outside footpath of groove is consistent with the inside and outside footpath of drilling rod, and the inside and outside footpath of projection is consistent with the inside and outside footpath of pipe collar; Groove is relevant with the stopband center frequency of inhibition noise with the length of projection, is determined by formula (1);
Step 2, when up drill string vibrating bottom noise is stronger, the sound insulation frequency band of single structure sound insulator will narrow down, and cause carrying out reliably squelch; The narrower deficiency of sound insulation frequency band for the single structure sound insulator exists according to noise spectrum feature in down-hole in the actual transmission channel, is divided into low-frequency range, Mid Frequency and high band relatively with the noise spectrum scope; For different noise band limits, single structure sound insulator by the corresponding frequency band scope is threaded successively and forms the unitized construction sound insulator, its medium and low frequency suppresses the single structure sound insulator and links to each other with the bottom drill collar, and HF reject single structure sound insulator links to each other with the transmission pipe nipple that acoustic transmitter is installed; Single structure sound insulator size in the unitized construction sound insulator can be decided according to concrete carrier frequency, for optimizing sound insulation property, on the size Selection of each single structure sound insulator pipe nipple, need follow following principle: the logical stopband of each adjacent single structure sound insulator is intersected, namely, the passband of a certain single structure sound insulator is adjacent overlapping or most of intersecting of the stopband of single structure sound insulator, to obtain whole wider rejection band bandwidth, thereby can farthest isolate from the impact on sound transmission signal of the upstream noise of bottom drill bit, reduce simultaneously echo and disturb.
2. a kind of down-hole noise and the passive inhibition method of echo for drill string sound transmission technology as claimed in claim 1 is characterized in that: the material that changes sound insulator itself can be adjusted sound insulator structure and optimization sound insulation property.
3. a kind of down-hole noise and the passive inhibition method of echo for drill string sound transmission technology as claimed in claim 1 is characterized in that: change physical dimension or the shape facility of sound insulator, capable of regulating or optimization sound insulation property; The physical dimension of described change sound insulator or shape facility are to make the groove of periodicity groove unequal with the length of projection.
4. a kind of down-hole noise and the passive inhibition method of echo for drill string sound transmission technology as claimed in claim 1 is characterized in that: utilize the high strength packing material that the groove structure of sound insulator is filled, capable of regulating or optimization sound insulation property.
5. a kind of down-hole noise and the passive inhibition method of echo for drill string sound transmission technology as claimed in claim 1, it is characterized in that: sound insulator is positioned at the top of bottom drill collar, and λ/4 places, acoustic transmitter below, wherein, λ is the wavelength of sound transmission carrier wave in the channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210345597.4A CN102881280B (en) | 2012-09-17 | 2012-09-17 | Passive suppressing method for downhole noise and echo for sound transmission technology of drill string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210345597.4A CN102881280B (en) | 2012-09-17 | 2012-09-17 | Passive suppressing method for downhole noise and echo for sound transmission technology of drill string |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102881280A true CN102881280A (en) | 2013-01-16 |
| CN102881280B CN102881280B (en) | 2014-06-11 |
Family
ID=47482582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210345597.4A Expired - Fee Related CN102881280B (en) | 2012-09-17 | 2012-09-17 | Passive suppressing method for downhole noise and echo for sound transmission technology of drill string |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102881280B (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103806903A (en) * | 2014-02-20 | 2014-05-21 | 西安石油大学 | Sound wave remote measuring sound insulator following drilling |
| CN103967481A (en) * | 2014-05-29 | 2014-08-06 | 中国石油集团钻井工程技术研究院 | Method and system for real-time multi-parameter measurement and transmission while drilling in all well sections |
| CN104505085A (en) * | 2014-12-03 | 2015-04-08 | 南京大学 | Ultra-wideband acoustic absorber |
| WO2015089658A1 (en) * | 2013-12-17 | 2015-06-25 | Hifi Engineering Inc. | Sound baffle device and system for detecting acoustic signals |
| CN104863565A (en) * | 2015-04-23 | 2015-08-26 | 中国石油大学(华东) | Tool and method for controlling drilling noise of hollow power drilling tool for underground information acoustic transmission |
| CN105888655A (en) * | 2016-05-05 | 2016-08-24 | 中国海洋石油总公司 | While-drilling acoustic wave insulating structure |
| CN107542455A (en) * | 2016-06-24 | 2018-01-05 | 中石化石油工程技术服务有限公司 | A kind of acoustic logging-while-drillidevice device |
| CN108412484A (en) * | 2018-04-19 | 2018-08-17 | 赵国山 | A kind of wireless sonic transmissions shaft bottom noise isolator based on drill string channel |
| CN108663972A (en) * | 2018-05-23 | 2018-10-16 | 中国石油大学(北京) | NMR while drilling instrument master control system and device |
| CN109869142A (en) * | 2017-12-01 | 2019-06-11 | 中国石油化工股份有限公司 | A kind of downhole data transmission device and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5274606A (en) * | 1988-04-21 | 1993-12-28 | Drumheller Douglas S | Circuit for echo and noise suppression of accoustic signals transmitted through a drill string |
| US20050024232A1 (en) * | 2003-07-28 | 2005-02-03 | Halliburton Energy Services, Inc. | Directional acoustic telemetry receiver |
| US20060203614A1 (en) * | 2005-03-09 | 2006-09-14 | Geo-X Systems, Ltd. | Vertical seismic profiling method utilizing seismic communication and synchronization |
| CN102354501A (en) * | 2011-09-27 | 2012-02-15 | 北京航空航天大学 | Unidirectional echo and noise suppression method used in drill string acoustic transmission technology |
-
2012
- 2012-09-17 CN CN201210345597.4A patent/CN102881280B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5274606A (en) * | 1988-04-21 | 1993-12-28 | Drumheller Douglas S | Circuit for echo and noise suppression of accoustic signals transmitted through a drill string |
| US20050024232A1 (en) * | 2003-07-28 | 2005-02-03 | Halliburton Energy Services, Inc. | Directional acoustic telemetry receiver |
| US20060203614A1 (en) * | 2005-03-09 | 2006-09-14 | Geo-X Systems, Ltd. | Vertical seismic profiling method utilizing seismic communication and synchronization |
| CN102354501A (en) * | 2011-09-27 | 2012-02-15 | 北京航空航天大学 | Unidirectional echo and noise suppression method used in drill string acoustic transmission technology |
Non-Patent Citations (4)
| Title |
|---|
| 《2006 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP 2006 Proceedings.》 20060519 Sinan Sinanovi�c,et al. DIRECTIONAL PROPAGATION CANCELLATION FOR ACOUSTIC COMMUNICATION ALONG THE DRILL STRING IV-521-IV-524 1-5 第4卷, * |
| SINAN SINANOVI´C,ET AL.: "DIRECTIONAL PROPAGATION CANCELLATION FOR ACOUSTIC COMMUNICATION ALONG THE DRILL STRING", 《2006 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH AND SIGNAL PROCESSING, ICASSP 2006 PROCEEDINGS.》 * |
| 李成等: "信道阻尼边界对井下钻杆声传输的影响", 《振动与冲击》 * |
| 李成等: "可多线程测量的模拟钻杆四分量力虚拟仪器", 《清华大学学报（自然科学版）》 * |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10428644B2 (en) | 2013-12-17 | 2019-10-01 | Hifi Engineering Inc. | Sound baffle device and system for detecting acoustic signals |
| WO2015089658A1 (en) * | 2013-12-17 | 2015-06-25 | Hifi Engineering Inc. | Sound baffle device and system for detecting acoustic signals |
| CN103806903A (en) * | 2014-02-20 | 2014-05-21 | 西安石油大学 | Sound wave remote measuring sound insulator following drilling |
| CN103806903B (en) * | 2014-02-20 | 2016-04-06 | 西安石油大学 | A kind of with brill Acoustic telemetry acoustic isolater |
| CN103967481A (en) * | 2014-05-29 | 2014-08-06 | 中国石油集团钻井工程技术研究院 | Method and system for real-time multi-parameter measurement and transmission while drilling in all well sections |
| CN104505085A (en) * | 2014-12-03 | 2015-04-08 | 南京大学 | Ultra-wideband acoustic absorber |
| CN104863565A (en) * | 2015-04-23 | 2015-08-26 | 中国石油大学(华东) | Tool and method for controlling drilling noise of hollow power drilling tool for underground information acoustic transmission |
| CN104863565B (en) * | 2015-04-23 | 2017-10-10 | 中国石油大学(华东) | The down-hole information sound transmission creeps into Noise measarement instrument and method with hollow drive drilling tool |
| CN105888655A (en) * | 2016-05-05 | 2016-08-24 | 中国海洋石油总公司 | While-drilling acoustic wave insulating structure |
| CN107542455A (en) * | 2016-06-24 | 2018-01-05 | 中石化石油工程技术服务有限公司 | A kind of acoustic logging-while-drillidevice device |
| CN107542455B (en) * | 2016-06-24 | 2024-04-02 | 中石化石油工程技术服务有限公司 | Acoustic logging while drilling device |
| CN109869142A (en) * | 2017-12-01 | 2019-06-11 | 中国石油化工股份有限公司 | A kind of downhole data transmission device and method |
| CN109869142B (en) * | 2017-12-01 | 2021-11-23 | 中国石油化工股份有限公司 | Underground data transmission device and method |
| CN108412484A (en) * | 2018-04-19 | 2018-08-17 | 赵国山 | A kind of wireless sonic transmissions shaft bottom noise isolator based on drill string channel |
| CN108412484B (en) * | 2018-04-19 | 2023-12-22 | 中石化石油工程技术服务有限公司 | Bottom hole noise isolation device for wireless sound wave transmission based on drill string channel |
| CN108663972A (en) * | 2018-05-23 | 2018-10-16 | 中国石油大学(北京) | NMR while drilling instrument master control system and device |
| US11280932B2 (en) | 2018-05-23 | 2022-03-22 | China University Of Petroleum-Beijing | Main control system and a device for a nuclear magnetic resonance logging while drilling tool |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102881280B (en) | 2014-06-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102881280B (en) | Passive suppressing method for downhole noise and echo for sound transmission technology of drill string | |
| RU2477369C2 (en) | Determination of fluid parameters as per acoustic logging data | |
| CN102354501B (en) | Unidirectional echo and noise suppression method used in drill string acoustic transmission technology | |
| CN202170793U (en) | Logging-while-drilling sound wave logging device and transmitting transducer | |
| CN102162358B (en) | Soundwave-while-drilling well logging device | |
| CN104453854B (en) | A kind of acoustic logging while drilling method and device based on double source flyback technology | |
| CN202926323U (en) | Direction sound wave well logging device while drilling | |
| WO2006034475A2 (en) | Method and apparatus for generating acoustic signal with single mode of propagation | |
| CN103775067A (en) | Directional sound wave logging while drilling device | |
| CN103397878B (en) | Acoustic logging-while-drilling device of variable-diameter sound insulation structure | |
| CN102322258A (en) | Drill-following acoustic logging method and device capable of reducing and insulating sound on drill collar | |
| WO2018223571A1 (en) | Monopole acoustic logging-while-drilling instrument used in cooperation with bottom drilling tool assembly, and method for measuring shear wave velocity of slow formation | |
| US7210555B2 (en) | Low frequency acoustic attenuator for use in downhole applications | |
| US20130286787A1 (en) | Low-Frequency Seismic-While-Drilling Source | |
| US10637529B2 (en) | Signal equalisation | |
| de Almeida Jr et al. | A review of telemetry data transmission in unconventional petroleum environments focused on information density and reliability | |
| CN103061754A (en) | Electromagnetic wave measurement while drilling system wireless remote receiving device and measuring method and application thereof | |
| EA011147B1 (en) | Dynamic acoustic logging using a feedback loop | |
| WO2018125058A1 (en) | Quasi-static stoneley slowness estimation | |
| CN204283420U (en) | Multipolar array acoustic tool low frequency monopole transducer | |
| CN105545292A (en) | Treatment method for slurry continuous wave signal | |
| Gutierrez-Estevez et al. | Acoustic channel model for adaptive downhole communication over deep drill strings | |
| US20160146956A1 (en) | Versatile Acoustic Source | |
| US10545255B2 (en) | Acoustic signal attenuator for LWD/MWD logging systems | |
| US20190219718A1 (en) | Dipole Shear Velocity Estimation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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: 20140611 Termination date: 20150917 |
|
| EXPY | Termination of patent right or utility model |