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WO1980002877A1 - Systeme radio d'analyse sismique - Google Patents

Systeme radio d'analyse sismique Download PDF

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Publication number
WO1980002877A1
WO1980002877A1 PCT/US1980/000732 US8000732W WO8002877A1 WO 1980002877 A1 WO1980002877 A1 WO 1980002877A1 US 8000732 W US8000732 W US 8000732W WO 8002877 A1 WO8002877 A1 WO 8002877A1
Authority
WO
WIPO (PCT)
Prior art keywords
receiver
transmitter
seismic
antenna
field unit
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.)
Ceased
Application number
PCT/US1980/000732
Other languages
English (en)
Inventor
R Imm
W Mcdavid
J Mckeever
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fairfield Industries Inc
Original Assignee
Fairfield Industries Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fairfield Industries Inc filed Critical Fairfield Industries Inc
Publication of WO1980002877A1 publication Critical patent/WO1980002877A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/22—Transmitting seismic signals to recording or processing apparatus
    • G01V1/223—Radioseismic systems

Definitions

  • This invention pertains to seismic surveying systems and more particularly to seismic surveying systems including radio communications between the field data acquisition units and the base recording station.
  • the seismic gathering system includes a plurality of field units for detecting seismic energy and for transmit ⁇ ting information to a recording station.
  • the recording station may conveniently be located in a mobile vehicle, preferably in a centrally positioned aircraft flying over the arrayed field units.
  • the recording station includes a radio command transmitter for transmitting a command signa to the field units, and a plurality of receivers for recei ing information transmitted from the field units.
  • Each field unit includes a receiver for receiving the command signal from the command transmitter, a field unit transmitter for transmitting to the recording station, dat representative of seismic energy detected, and means respo sive to the command signal received for enabling the field unit transmitter for transmission for only a preset period of time.
  • each field unit comprise an antenna normally coupled to the receiver of the field unit, a power supply normally coupled to the receiver, circuitry coupled to the output of the receiver for pro ⁇ ducing a time dependent function in response to a command signal received, and means responsive to the time dependen function for connecting the transmitter with the power supply and with the antenna and for disconnecting the re ⁇ DCver from the antenna during the time period of the time dependent function.
  • Fig. 1 pictorially illustrates the seismic gathering system employed in one mode of operation.
  • Fig. 2 is a block diagram of a first embodiment of a field unit employed in the seismic gathering system of Fig. 1.
  • Fig. 3 is a block diagram of a second embodiment of a field unit employed in the seismic gathering system of Fig. 1.
  • Fig. 4 is a simplified schematic diagram of a phase locked loop circuit employed in the circuit shown in Fig. 2.
  • each field unit includes a battery 161 for a power supply, a seismic amplifier 91, a radio frequency trans ⁇ mitter 93, an antenna 43, and an f radio receiver illus ⁇ trated in dotted block 159.
  • Each field unit also has a transformer 99 for effectively coupling either a hydrophone or a geophone (or a geophone array) to the amplifier, where- by either type of detector may be used with the field unit.
  • the coil of a geophone is illustrated at 107, while the crystal of a hydrophone is illustrated at 105.
  • Inputs 101A and 10IB are provided for hydrophone connections while inputs 103A and 103B are provided for geophone connections.
  • Preamplifier 105A provides amplification of the seismic signal and impedance transformation.
  • Preamplifier termina ⁇ tion 301A provides power for preamplifier 105A.
  • the equip ⁇ ment of each field unit is located in a waterproof container and may be floated if necessary by a floatable jacket illus- trated at 45 in Fig. 1, which jacket may be formed of styro- foam, for example.
  • a transmitter 93 of the field unit is preferably a frequency modulated transmitter, each such transmitter oper-
  • Each transmitt preferably comprises a voltage controlled oscillator, the output frequency of which is modulated by the output of it seismic amplifier.
  • the transmitters are employed to trans mit to a remote recording station illustrated at 51 in Fig. 1, data representative of seismic energy detected by their included detector or detectors.
  • the recording station may be located near the seismic source or a point remote there from, and may conveniently be located in an aircraft, a truck, a ship or in a building.
  • Such a recording station has a number of radio receivers, corresponding with the number of field units, for receiving the seismic informati transmitted from the field units. Each is tuned to one of the channels for receiving information from a specific fiel transmitter.
  • the receivers at the recording station are illustrated at 53. They are fm receivers and are coupled t an antenna 55 by way of a preamplifier 57 and respective channels of a radio frequency power divider system 59.
  • the output of recievers 53 is coupled or interfaced with a fiel recorder 61 for making traces 81, 83, 85 and 87 on a suit ⁇ able readout 89.
  • command fm transmitter 71 having its own antenna 73. It operates on its own specific band and is employed to send command sig ⁇ nals to fm receiver 77 connected to control source 27 and receiver 159 of each of the field units to actuate or enabl the field unit transmitters for transmission in a manner hereinafter explained.
  • a suitable command signal is trans ⁇ mitted just before the seismic source is actuated.
  • an energy source Assuming that the recording station is remotely locate from the energy source, as illustrated, an energy source
  • t antenna 75 and receiver 77 are employed to receive the command signal for actuating the energy source, for example, including a charge of dynamite, to generate seismic energy. Reflected energy is detected by the detectors and the data from the respective field units is transmitted by the field unit transmitters to their respectively tuned receivers at the recording station. As will be explained in more detail subsequently, the field units allow transmission for a preset period of time and then the transmitters therein are shut down. The length of time of the preset period for each field unit can be separately set so that for the more remote units, the periods can be longer. The outputs of the receivers at the recording station are recorded by recorder 61.
  • Recording of the field data transmitted preferably is in binary form; however, for the sake of simplicity, the data transmitted from the four field units is illustrated as being"recorded as analog traces 81, 83, 85, and 87 on a record 89. Although not illustrated, it is to be understood that the shot time also will be recorded on an illustrated readout record 89.
  • Fig. 2 there is shown in block form, components of a field unit for allowing recep ⁇ tion of a command signal from the command transmitter 71 and then transmission of the detected data to the recording station.
  • the command signal may comprise a 72.980 MHz car ⁇ rier, frequency modulated by a 1.2 KHz signal, the latter of which may be applied for about 0.3 second.
  • ganged switches 151 and 153 are in contact with ter ⁇ minals 155 and 157, respectively, so that antenna 43 is connected to receiver 159 and power is applied to the re ⁇ DC from battery 161.
  • transmitter 93 is disconnected from antenna 43 and from the power supply, again via switches 151 and 153, respectively.
  • the command signal is detected by antenna 43 and its output is applied to a radio frequency amplifier 163, the output of which is coupled to a mixer 165. Also coupled to mixer 165 is the output of a frequency tripling circuit 169, in turn, connected to an oscillator
  • Oscillator 167 in one embodiment produces a 10.76 MHz frequency signal which is tripled by network 169 for the production of a 62.28 MHz frequency output.
  • the mixer 165 produces a difference frequency of 10.7 MHz, which is then applied to a crystal filter 71.
  • Mixer 165 and oscillator 167 reduce the center frequency and take advantage of the narrow band width of the crystal filter , 171, which operates at a center frequency of 10.7 MHz and has a band width of 3 KHz.
  • the output of crystal filter 171 in one path is ampli ⁇ fied by amplifiers 173 and 175 and is applied to a series regulator 177.
  • a preset threshold amplitude series regulator 177 is activated to apply power to an intermediate frequency amplifier 179, connected to a dis ⁇ criminator 181, connected to an audio amplifier 183 and finally connected to a narrow band pass filter 185. Power also is applied to series regulator 197, and hence to timer 187. Filter 185 is employed to filter out sporadic noise. The purpose of the discriminator is to demodulate the 10.7 MHz frequency signal and to recover the command modulating signal.
  • the command modulating signal is amplified by audio amplifier 183 and is applied by way of filter 185 to trigge adjustable timer 187, which produces an output level or rectangular wave for a preset period of time to actuate relay coil 189.
  • coil 189 When coil 189 is energized, ganged switche 151 and 153 are moved to contact terminals 191 and 193, respectively.
  • antenna 43 is disconnected from receiver 159 and connected to transmitter 93.
  • Power also is disconnected from receiver 159 and connected to 15- volt regulater 195 to supply power to transmitter 93 and to seismic amplifier 91.
  • the output of the particular detector employed is amplified and transmitted t the recording station.
  • timer 187 comprises a one-shot or monostable multivibrator whose output waveform may be ad- justed to various time periods by adjustment of switch 187A, which forms part of the time constant network connected to the onostable multivibrator.
  • Timer components 187 and 187a may be an integrated circuit of type SN74121 manufactured and sold by Texas Instruments of Dallas, Texas. The purpose of timer 187 is to allow transmission for only a preset time period to conserve the life of battery 161 and to avoid the use of a separate receiver antenna, which would otherwise be required for the reception of a turn-off signal.
  • monostable multivibrator 187 is adjusted to produce output waveforms having time durations of 20, 40, 80, or 160 seconds.
  • timer 187 allows trans ⁇ mission to take place only for a preset period of time following reception of a command signal from the recording station command transmitter.
  • the time periods above men- tioned are sufficient in most cases to allow detection of seismic energy by the seismic detectors and transmission of the data to the recording station following actuation of the seismic energy source. It is to be understood that differ ⁇ ent or longer time periods may be employed, if desired.
  • power is applied to timer 187 by way of a series regulator 197.
  • This regu ⁇ lator is powered by regulator 177 initially when it is activated by the command signal and then directly from battery 161 when switch 153 is moved to contact terminal 193.
  • a storage capacitor is employed in regulator 177 which maintains power during the switching time of the relay comprising coil 189 and switches 151 and 153.
  • the power normally applied to receiver 159 during the quiescent period is of such low amplitude that very little drain on the battery is experienced. .
  • the seismiG gathering syste includes 40 individually selected crystal controlled chan ⁇ nels, for the field unit transmitters and recording statio receivers, with 40 KHz channel spacing from 72.020 MHz to 72.980 MHz as the carrier frequencies. Forty-eight field units, and hence forty-eight field transmitters, may be employed for detecting and transmitting seismic informatio A corresponding number of receivers are employed at the recording station, each being tuned to receive information transmitted by way of a specific channel from a given tran mitter.
  • the receivers each are preferably of the single- conversion fm superheterodyne type, although other types o receivers may be used. Each channel is manually tunable within +20 KHz of its assigned channel center frequency.
  • the carrier frequency of .the recording station command transmitter operates in one system embodiment at 72.980 MH as indicated previously.
  • the energy source receiver, if employed, and the receiver of each field unit are tuned to this same frequency.
  • each field unit is con ⁇ tained in a two-part case.
  • the electronics are located in one module and a battery in the second. Both compartments are waterproof and designed with a quick disconnect.
  • Al ⁇ though not shown, an anchor may be employed if desired for anchoring a field unit in water.
  • the output voltage of the battery is 18 volts dc.
  • the discharge time of the battery i 20 hours at 20°C and 4 hours at -40°C.
  • the antennas for t field units and for the recording station may be vertical dipoles, 56 inches high. They are used, as explained above, both as a transmitter or receiver antenna and the trans ⁇ mitter has a range up to 30 miles.
  • the command antenna may also be a vertical dipole antenna.
  • Transformer 99 may have a turns ratio of 10:3 between inputs 101A and 101B and coil 99B and a turns ratio of 1:3 between inputs 103A and 103B and coil 99B. This arrangemen provides a high impedance load for crystal 105 of the hydro phone and allows one to obtain a low damping resistance for coil 107 of the geophone. A resistor 109 may be coupled c: across the leads of coil 107 to obtain the desired damping resistance. Transformer 99 also provides common mode rejec ⁇ tion of ac power line noise on the detector leads, which may be present in certain areas, particularly in land areas where the geophones are employed. This coupling arrange ⁇ ment for allowing either geophones or hydrophones to be coupled to each field unit is well known.
  • com ⁇ ponents are illustrated in block diagram form of another model of a field unit suitable for operating with respect to a radio transmitted command signal from command transmitter 71 located in recording station 51.
  • the field unit is activated by the command signal, detects seismic data in the vicinity of the field unit and radio transmits the detected data to the recording station.
  • the command signal preferably comprises a 72.980 MHz carrier, frequency modulated by a 1.2 KHz signal, the latter of which may be applied for about 0.3 second.
  • the field unit shown in Fig. 3 is activated when switch 252 is manually positioned to be in contact with terminal 251. This is done at the time that the field unit is made operable in the field.
  • the output from source 254 is connected to two voltage regulators, 11.2-volt regulator 255 and 5.6-volt regulator 256.
  • the components in the receiver section of the field unit as is explained more fully hereinafter, are biased by either the 11.2-volt output from regulator 255 or the 5.6- volt output from regulator 256.
  • the 11.2-volt output from regulator 255 is connected to timer 257 to enable operation thereof in a manner herafter explained.
  • battery 253 is also connected to 15-volt ator control 258 and to diode control 259, which may convenientl be housed in the same package.
  • 15-volt regulator control 258 is connected to 15-volt regulator 260, for enabling the field unit transmitter components at the appropriate time, and diode control 259 is connected to diode switch 261.
  • Antenna 43 which may be conveniently of the same type as for the other field unit embodiment previously described is normally connected through switch 261 to the receiver section of the field unit when the unit is awaiting an activating command signal from the central recording sta ⁇ tion.
  • An activating command signal has the time delayed effect of producing an activating input 263 to timer 257.
  • the output of the timer is typically either the normal low level output of zero or the high level output of 11.2 volts as supplied thereto from regulator 255.
  • This type of outpu is sometimes referred to as a rectangular wave, the duratio of which is determined by timer control 265.
  • Timer 257 may conveniently be an integrated circuit MC14541 and timer control 265 may conveniently be selectable time constant network operable therewith.
  • Transmit delay 257B retards activation of 15-volt regulator control 258, which consequentially delays trans ⁇ mitter activation.
  • the delay provides other field units in the vicinity an opportunity to detect the command without interference from the transmitter of a unit which has de ⁇ tected the command more quickly.
  • the preferred time delay is one second.
  • the high voltage output from the timer activates 15-volt regulator control 258 and diode control 259.
  • Control 258 causes 15-volt regulator 260 to supply bias voltage for the transmitter components of the field unit until the low voltage output again occurs from timer 257.
  • Diode control 259 produces a 20 milliampere output that switches diode switch 261 so as to disconnect antenna 43 from the receiver section of the field unit and to con ⁇ nect antenna 43 to the transmitter section of the field unit.
  • the output from timer_____ 257 again reduces to the low voltage level.
  • Application of this lever to control units 258 and 259 causes removal of 15-volt bias voltage from the transmitter section of the field unit via regulator 260 and causes switching of diode
  • Switch 261 so as to disconnect the antenna from the trans ⁇ mitter section and connect it to the receiver section.
  • Switch 261 may conveniently be a PIN diode switch.
  • rf amplifier 270 which is coupled to first autodyne converter 271, which comprises in a single network a suit ⁇ able oscillator, mixer, and amplifier. Separate oscilla ⁇ tors, mixers and amplifiers could be employed, if desired.
  • the oscillator of the autodyne converter in one preferred embodiment, operates in the third overtone mode at 62.28 MHz.
  • the output from- the mixer and amplifier, and, hence, from the autodyne converter, is at 10.7 MHz.
  • Autodyne converter 271 is connected to filter 273 for
  • Filter 273 is coupled to rf amplifier 275, where the 10.7 MHz signal is amplified prior to being coupled to a second autodyne converter 277.
  • converter 277 is a unitary network comprising suitable oscillator, mixer
  • the oscillator is crystal controlled to operate on the funda ⁇ mental mode of 11.155 MHz. Mixing of the incoming 10.7 MHz therewith produces an output of 455 KHz, which is amplified
  • Limiter 281 amplifies the 455 KHz signal and then removes all amplitude components over a
  • AGC amplifier 283 samples the 455 KHz signal and provides a dc voltage level which is dependent on as feedback automatic gain control to the receiver section of the field unit via its input rf amplifier 270. This fed back signal controls the amount of amplifcation of the rf signal applied to amplifier 270. Hence, any distortion in the receiver caused by an overly strong rf signal will be avoided by a reduction in the signal before distortion can occur.
  • the output of limiter 281 is applied to PLL demodulato 285, ' the main components of which are shown in Fig. 4.
  • the PLL demodulator detects the presence of the modulation signal carried by the 455 KHz if signal. In a preferred operating embodiment this modulation signal is 1100 Hz.
  • a PLL network comprises three basic components, as shown in Fig. 4, 'viz., a phase comparator, a first order filter and voltage controlled oscillator (VCO) .
  • the three components are connected in a loop, the input being applied to the phase comparator together with the output of the VCO.
  • the phase difference of this internal oscillator and the applie input produces an output to the filter, viz., the modulatio product carried on the 455 KHz if input.
  • the filter filter out noise and other products of the combined signal and supplies the 1100 Hz output.
  • the 1100 Hz voltage to the VC is integrated to a voltage level that phase locks the VCO t the incoming 455 KHz signal.
  • AFC 287 is connected to demodulator 285 to further provide setting of the internal frequency of the oscillator so that the band pass of the demodulator is centered about the 455 KHz if signal.
  • Filter 289 receiving the output from demodulator 285, removes unwanted signals from the demodulated signal.
  • This signal is a voltage varying between zero volts and about 5. volts at the 1100 Hz rate.
  • the 1100 Hz voltage signal is applied to another phase locked-loop network, viz., PLL tone decoder 291. Since there are no modulation products on the 1100 Hz signal othe than noise, the output from decoder 179 is either noise (when there is no 1100 Hz signal present) or 5 volts (the d level produced when there is an 1100 Hz signal present) .
  • AFC 293 is connected to decoder 291 to further provide setting of the internal frequency of the oscillator so that the band pass of the decoder is centered about 1100 Hz. Integrater 295 connected to receive the output of decoder 291 removes any noise from the output of the de ⁇ coder.
  • Timer trigger in ut 257A inhibits a trigger pulse from integrator 295 to timer 257 for a period of approximately 11 seconds.
  • the timer control is suitable for setting the timer for operation once a trigger is received from about 20 seconds of transmitter operation to more than four hours. A four position, push button control may be used for selecting the time delay operations from 16 possible times.
  • the transmitter section of the field unit comprises, consecutively, seismic amplifier 201, modulator 303, oscil- lator 305, driver 307, and rf power amplifier 309, all of which are conventional components.
  • control 311 is a three-position gain select for the seismic amplifier in 6 db increments.
  • the detector portion of the unit comprises substantially the same components of the unit shown in the embodiment of Fig. 2 and are similarly numbered.
  • the detected seismic signals are in the 0-240 Hz range and the signal transmitted is narrow band fm modulated with 5 KHz deviation.
  • a water covered area 11 is located between two land areas 13 and 15.
  • a plurality of field units in accordance with the present invention are located along the traverse at spaced positions, each of these units being suitably equipped for detecting seismic energy.
  • Each field unit includes either one or an array of geophones or a hydrophone coupled there depending upon the type of surface area where the unit is located.
  • the geophones are located, of course, on land an are identified at 21; the hydrophones are located in the water and are identified at 23; and the field units, both land and connected to the hydrophones on suitable platform floating on the water are identified at 25.
  • a single hydrophone is employed at a given water seismic detector location while an array of geophones, illustrated at 21A, 2IB and 21C is employed at a given seismic detecto location, on land.
  • Incident seismic energy from a seismic sound or energy source 27 is depicted by arrow 29, while reflected seismic energy from interface 31 is depicted by arrows 33, 35, 37 and 39.
  • the energy source may be conven tional dynamite or the newer nonexplosive sources.
  • Althoug only four seismic detector or receiver locations are shown it is to be understood that more are normally actually employed, for example 24, 48, 96, etc., depending upon the number of traces and amount of coverage desired per record
  • the inven- tion is not limited thereto, since modifications may be made and will become apparent to those skilled in the art.
  • the command transmitter does not have to be located at the recording station.
  • the packaging of the field unit may conveniently be in one package rather than two, as described above with respect to the Fig. 2 embodiment.

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  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Acoustics & Sound (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

Un systeme d'analyse sismique comprend une pluralite d'unites de terrain (25) de detection de l'energie sismique et de transmission de l'information par transmission radio a une station d'enregistrement (51). La station d'enregistrement (51) comprend de preference un emetteur de commande (71) pour transmettre un signal de commande a frequence radio aux unites de terrain (25) et une pluralite de recepteurs (57) pour recevoir les informations transmises provenant des unites de terrain (25). La station d'enregistrement (51) peut etre situee dans un avion; cependant, elle peut etre montee a terre, sur un vehicule ou un navire. Chaque unite de terrain (25) comprend un recepteur de reception du signal de commande et un emetteur radio de transmission a la station d'enregistrement des donnees representatives de l'energie sismique detectee. De plus, des circuits de conservation de l'energie sont prevus dans chaque unite de terrain et repondent au signal de commande recu et permettent a l'emetteur de terrain de transmettre seulement pendant une periode de temps preetablie.
PCT/US1980/000732 1979-06-14 1980-06-12 Systeme radio d'analyse sismique Ceased WO1980002877A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US4839379A 1979-06-14 1979-06-14
US48393 1979-06-14

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Publication Number Publication Date
WO1980002877A1 true WO1980002877A1 (fr) 1980-12-24

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PCT/US1980/000732 Ceased WO1980002877A1 (fr) 1979-06-14 1980-06-12 Systeme radio d'analyse sismique

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BR (1) BR8003686A (fr)
GB (1) GB2056222A (fr)
WO (1) WO1980002877A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0115146A3 (en) * 1982-12-29 1986-08-06 Amoco Corporation Cableless seismic digital field recorder having on-site seismic data processing capabilities
EP0136111A3 (fr) * 1983-08-31 1987-01-21 William Franklin Russell Ensemble de télémetrie sismique à temps réel
US4654528A (en) * 1984-11-01 1987-03-31 E-Systems, Inc. Radiation level reporting system
US4757482A (en) * 1983-03-15 1988-07-12 Bolt Technology Corporation Modular airgun array method, apparatus and system
US4868795A (en) * 1985-08-05 1989-09-19 Terra Marine Engineering, Inc. Power leveling telemetry system
US4885724A (en) * 1986-03-04 1989-12-05 Amoco Corporation Cableless seismic digital field recorder having on-site seismic data processing capabilities
FR2692384A1 (fr) * 1992-06-11 1993-12-17 Inst Francais Du Petrole Système d'acquisition de données pourvu de moyens de traitement décentralisés.
US9720116B2 (en) 2012-11-02 2017-08-01 Fairfield Industries Incorporated Land based unit for seismic data acquisition
CN109031407A (zh) * 2018-08-01 2018-12-18 宁波市交通规划设计研究院有限公司 用于工程物探的地震道数字自动覆盖装置及其方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8700050D0 (en) * 1987-01-03 1987-07-08 Plessey Co Plc Security systems
DE102005004869A1 (de) * 2005-02-02 2006-08-10 Geoforschungszentrum Potsdam Erkundungsvorrichtung und Verfahren zur Registrierung seismischer Schwingungen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2479772A (en) * 1948-07-29 1949-08-23 Phillips Petroleum Co Method of and apparatus for geophysical exploration
US3062315A (en) * 1959-01-05 1962-11-06 Texaco Inc Radio-link system of seismic exploration
US3465286A (en) * 1968-07-05 1969-09-02 Exxon Production Research Co Seismic system with a radio communications link connecting the operating and seismic wave generating stations
US3555502A (en) * 1969-02-12 1971-01-12 Texas Instruments Inc Aerial drop telemetering sensor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2479772A (en) * 1948-07-29 1949-08-23 Phillips Petroleum Co Method of and apparatus for geophysical exploration
US3062315A (en) * 1959-01-05 1962-11-06 Texaco Inc Radio-link system of seismic exploration
US3465286A (en) * 1968-07-05 1969-09-02 Exxon Production Research Co Seismic system with a radio communications link connecting the operating and seismic wave generating stations
US3555502A (en) * 1969-02-12 1971-01-12 Texas Instruments Inc Aerial drop telemetering sensor

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0115146A3 (en) * 1982-12-29 1986-08-06 Amoco Corporation Cableless seismic digital field recorder having on-site seismic data processing capabilities
US4757482A (en) * 1983-03-15 1988-07-12 Bolt Technology Corporation Modular airgun array method, apparatus and system
EP0136111A3 (fr) * 1983-08-31 1987-01-21 William Franklin Russell Ensemble de télémetrie sismique à temps réel
US4654528A (en) * 1984-11-01 1987-03-31 E-Systems, Inc. Radiation level reporting system
US4868795A (en) * 1985-08-05 1989-09-19 Terra Marine Engineering, Inc. Power leveling telemetry system
US4885724A (en) * 1986-03-04 1989-12-05 Amoco Corporation Cableless seismic digital field recorder having on-site seismic data processing capabilities
FR2692384A1 (fr) * 1992-06-11 1993-12-17 Inst Francais Du Petrole Système d'acquisition de données pourvu de moyens de traitement décentralisés.
WO1993025919A1 (fr) * 1992-06-11 1993-12-23 Institut Français Du Petrole Systeme d'acquisition sismique pourvu de moyens de traitement decentralises
US9720116B2 (en) 2012-11-02 2017-08-01 Fairfield Industries Incorporated Land based unit for seismic data acquisition
CN109031407A (zh) * 2018-08-01 2018-12-18 宁波市交通规划设计研究院有限公司 用于工程物探的地震道数字自动覆盖装置及其方法
CN109031407B (zh) * 2018-08-01 2020-04-10 宁波市交通规划设计研究院有限公司 用于工程物探的地震道数字自动覆盖装置及其方法

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Publication number Publication date
BR8003686A (pt) 1981-01-13
GB2056222A (en) 1981-03-11

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