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7269095 |
Synchronization of seismic data acquisition systems
A network distributed seismic data acquisition system comprises seismic receivers connected to remote acquisition modules, receiver lines, line tap units, base lines, a central recording system and...
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6934219 |
Methods and systems for acquiring seismic data
Methods and systems are provided for acquiring seismic data. Data are collected representing acoustic signals received from the Earth at distinct geographic locations. Data representing an ambient...
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6028819 |
Method and system of simulating and optimizing land seismic operations
A method and system for simulating and optimizing land seismic survey operations. The method and system utilizes spatially referenced data and nonspatial data relevant to land seismic survey...
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6002640 |
Seismic data acquisition system
A seismic data acquisition system is featured that utilizes a series of nearly identical seismic shots (SISS) to synchronize and to communicate with novel data acquisition units (NDAU) located in...
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6002339 |
Seismic synchronization system
A system for synchronizing a seismic system having multiple subsystems. A control system transmits a message to selected subsystems and an internal subsystem counter is zeroed to a selected epoch....
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5540093 |
Method for optimizing the alignment of a horizontal borehole relative to the strike of rock-layer stress planes
As a means for determining the preferred azimuthal alignment of a horizontal borehole, the reflection travel time vectors between an acoustic source and a plurality of equidistant seismic receivers...
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4800538 |
Method of and systems for seismic exploration
Described are methods of and systems for seismic exploration wherein a master station and a plurality of slave stations are utilized in conjunction with remotely located seismic sources. The system...
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4782911 |
Seismic recording
A method and apparatus for indicating the time-break on a seismic record wherein the time-break is marked in response to the rupture of an electric circuit by the explosive charge used to generate...
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4733747 |
System and method for eliminating wave form distortion in multi-unit seismic source prospecting
Individual seismic source units of a surface array activated simultaneously for cumulative reinforcement may initiate seismic waves at slightly different times despite efforts at synchronization....
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4660638 |
Downhole recorder for use in wells
Method and apparatus for recording data downhole in a borehole. A recorder having a data memory is lowered into a data recording position in the borehole. A signal is transmitted downhole into the...
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4635746 |
Timing correction methods for seismic energy source operation
A method for determining the effective or apparent firing time of a seismic source. The seismic detectors positioned at known distances from the source, but outside the non-linear acoustic region,...
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4608673 |
Minimum phase bandpass filtering of seismic signals
A process for better defining first break seismic energy travel times for correlated seismic return signals that consists of constructing a minimum phase bandpass filter having bandwidth narrower...
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4422164 |
On-bottom seismometer electronic system
An ocean bottom seismometer unit records refraction waves from a seismic source. The refraction waves are digitzed and stored in a magnetic memory. Periodically, a tape recorder is started and...
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4369507 |
Conditional updating method and apparatus associated with a microcomputer system for automatically indicating and recording parameters that spatially define locations of seismic exploration spread and source arrays
The present invention relates to a method and apparatus for conditionally updating source-detector array parameters related to a seismic exploration system, especially during generation and...
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4365320 |
Device for determining the instant of reception of an acoustic wave
A device for the sequential transmission of information elements from a sensor arrangement receiving acoustic waves at different locations and a system for recording or processing these information...
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4234053 |
Seismic exploration method using a rotating eccentric weight seismic source
A seismic exploration method in which a rotating eccentric weight seismic source is employed to transmit a coded energy signal into the earth. A position sensor mounted on the source directly...
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4209855 |
Apparatus for controlling the transfer of seismic data from _magnetic tape storage to a photographic recording
Multiplexed seismic data representing a plurality of seismic channels intensity modulates each sweep of the electron beam of a cathode-ray tube. Each successive sweep of the electron beam is...
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4121191 |
Seismic data tape recording system
Apparatus for increasing the seismic data storage capacity of magnetic tape. A pair of storage registers store a sequential pair of digitized seismic data samples. A subtractor coupled to these two...
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4006445 |
Apparatus for and methods of seismic prospecting
In seismic prospecting a local response is achieved by striking a hammer on the ground, and the recording apparatus is arranged to be triggered by the hammer to run from a short time before the...
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3972019 |
Time synchronization
Accurate timing at distant points is obtained by timing units which will operate independently at these points without the transmission of time signals between the units. Each unit includes means...
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3891963 |
Coded radio shooting unit
Apparatus for activating a seismic explosive charge includes a communications link for permitting two-way communication between a control location and a seismic energy generator or explosive charge...
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3733584 |
SYSTEM FOR REMOTELY CONTROLLING AND ACTIVATING A SEISMIC VIBRATOR
This invention is applicable to seismic prospecting in which a vibrator is used as the source of seismic waves, and the seismic waves are detected, recorded and processed at a recording point...
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3687218 |
APPARATUS FOR AND METHOD OF CONTROLLING THE FIRING OF SEISMIC SOUND SOURCES
A digital control system for establishing preset delays in firing a plurality of pneumatic sound sources. Predetermined firing command delays between system triggering and source triggering are set...
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3624599 |
APPARATUS FOR SWITCHING GEOPHONES
Apparatus for switching a seismic recorder from an areal array of geophones to a direct arrival seismic wave detector, controlled a radio signal at the recorder location which is transmitted to the...
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3492636 |
WIRE LINE COMMUNICATION AND SHOOTING CONTROL SYSTEM
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3478839 |
ORIENTATION SENSING SYSTEM FOR WELL LOGGING TOOL FOR USE IN DEVIATED BOREHOLES
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3465286 |
SEISMIC SYSTEM WITH A RADIO COMMUNICATIONS LINK CONNECTING THE OPERATING AND SEISMIC WAVE GENERATING STATIONS
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3465348 |
OSCILLOGRAPHIC APPARATUS FOR PRODUCING HALF-SCALE TIMING LINES
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3460065 |
PROCESSING IDENTIFIED SEISMIC TAPE RECORDINGS
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3432806 |
METHOD AND APPARATUS FOR RECORDING IDENTIFYING DATA ON SEISMIC RECORDS
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3432805 |
TIME BREAK CORRECTOR FOR MARINE SEISMIC SIGNALS
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3416631 |
Digital remote firing system
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3412823 |
Seismic survey interconnection system
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3339175 |
Identification numbering for seismic tape recordings
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3333655 |
Interval velocity well logging system
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3322230 |
Apparatus for producing seismic waves and recording seismic signals
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3307649 |
Seismic system using a slotted disc source producing a binary code
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3281775 |
Automated system for the serial format recording and parallel format transcribing of repetitive seismic signals
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3277452 |
Apparatus for seismograph record sections
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3235048 |
Method and means for starting a recording drum
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3220503 |
Seismic shooting sequence timer
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3185249 |
Computing seismic information
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3144651 |
Time-scale recording apparatus
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3054473 |
System for recording data for use in seismic survey
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3044042 |
Apparatus for generating and employing time pulses
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3039558 |
Delayed initiation of seismic wave generation
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3038144 |
Seismic first break time count system
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3029894 |
Sonic prospecting
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3028579 |
Analog card programming device
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3022851 |
Sonic impulse generators for use in geophysical exploration
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