Matches 1 - 34 out of 34
Match Document Document Title
7173542 Data relay for casing mounted sensors, actuators and generators  
A casing sensor and methods for sensing using a casing sensor are disclosed. The casing sensor includes a casing shoe and a sensor coupled to the casing shoe. A casing data relay includes a...
6987463 Method for collecting geological data from a well bore using casing mounted sensors  
A casing sensor and methods for sensing using a casing sensor are disclosed. The casing sensor includes a casing shoe and a sensor coupled to the casing shoe. A casing data relay includes a...
EP1080548A1 COMBINED ANALOG/DIGITAL DATA TRANSMISSION SYSTEM  
Abstract not available for EP1080548 Abstract of corresponding document: WO9960719 A system and method for transmitting digital data (24) and/or control signals on the same pairs of wires which...
6115325 Variable length data field in a seismic data stream  
A variable length data packet in a seismic system includes a fixed-length data portion and a variable-length data portion, the amount of data in the variable-length portion depending on the number...
5243469 System for the acquisition of seismic data  
A seismic recording system comprises a multichannel recorder connected to a cable formed from a plurality of signal conductors. Each of the signal conductors is connected to a different channel of...
EP0243240B1 Partially transportable and re-usable acoustical route-plotting device  
Abstract of EP0243240 The acoustical route-plotting device for cooperative mobiles according to the invention comprises a processing centre (13, 14) situated on board a ship (2) for example and...
5058080 Multiple transmission path seismic telemetering system  
In a marine seismic data acquisition system, a plurality of seismic data transmission paths are utilized to conduct seismic data to a central recording unit from seismic data acquisition modules...
5043949 Data signal transmission cable and method  
A data signal transmission cable particularly adapted for use in seismic prospecting permits high speed digital data transmission. In a preferred embodiment, the cable includes a transceiver at...
5025454 Pulse to zero digital (PZ) modulation  
A "pulse to zero" modulation scheme is taught to transmit binary information by modulating a bit mark onto a carrier at the start of each "0" in the bit stream. The "pulse to zero" decoder produces...
4967400 Digital marine seismic system  
A digital marine seismic system employes a plurality of data acquisition control modules which simultaneously digitize analog seismic signals. The control modules also are selectably addressable in...
4939747 Digital communication system with addressable repeaters and devices for fault isolation  
For a digital communication system comprising a plurality of repeaters between two terminals from one of which the repeaters are to be selectively controllable for fault-location or remote-control...
4908802 Apparatus for fiber optic seismic exploration system  
A two-port fiber optic repeater includes means for receiving and restoring command word signals and means for receiving and restoring return data signals. A periodically actuated power supply...
4796025 Monitor/control communication net with intelligent peripherals  
A monitor/control communication net with intelligent peripherals, that is, peripherals which are capable of monitoring and/or controlling various devices in accordance with messages received from a...
4744064 Method and apparatus for seismic exploration  
Method and apparatus for digitally deriving arrays from seismic data. Indentical parallel processing elements connected between common input/output buses are each preselected to derive different...
EP0243240A1 Partially transportable and re-usable acoustical route-plotting device.  
The acoustical route-plotting device for cooperative mobiles according to the invention comprises a processing centre (13, 14) situated on board a ship (2) for example and connected by a radio...
4693335 Multi channel borehole seismic surveying tool  
Apparatus for seismic surveying a borehole by simultaneously measuring seismic signals at a plurality of elevations within the borehole. A resilient tubular member is filled with a liquid and the...
4689774 Seismic streamer section  
A hydrophone section for a seismic streamer towed array in which the hydrophones 2 are arranged in groups of not more than 7, the spacing of the hydrophones within each group being such that each...
4654860 Spacecraft telemetry regenerator  
Individual data bit streams which have been merged into a telemetry stream are regenerated in their original format and at their original data rates by storing frames of the telemetry streams in a...
4654660 Optical telemetric transceiver  
An optical telemetric system for use in seismic exploration consists generally of a recorder, a plurality of transceivers, and a like number of cable sections interconnecting each transceiver in...
4628494 Method for the remote control of signal acquisition devices by means of a narrow passband transmission channel and a device for the implementation of the method  
In a system for seismic exploration, a narrow passband channel of relatively-slow transmission speed is used to transmit commands from a control station to one or more remote signal acquisition...
4628493 Sensor system with time division multiplexing telemetry  
A seismic array containing a large number of seismic sensors, which may be optical hydrophones, has successive sections, each of which contains a subarray of sensor channels, interconnected by a...
4599712 Modular airgun array method, apparatus and system  
A plurality of control station, watertight, submerged junction boxes are towed at spaced positions located along an airgun array, each junction box for including a microprocessor and data storage...
4509170 Time division multiplex transmission of submultiplex sequences of signals from sections of a chain of data acquisition units  
Time Division Multiplex (TDM) telemetry of submultiplex sequences of signals which may be obtained from successive sections of sensors in a sensor array are transmitted synchronously by locking...
4506263 Data transmission system for logging tools  
A system for storing and transmitting pulse count information is disclosed wherein electrical pulses produced by logging tools, such as thermal neutron, are counted and stored downhole to remove...
4497045 Seismic system with signal multiplexers  
A cable system for carrying out seismic operations, comprising a multi-conductor cable built with multiple segments, each segment terminated with identical connector plugs. Each segment having a...
4390974 Seismic data telemetric system  
A data telemetric system consists of a pair of optical fibers, each having an associated electrically conductive member. One of the fibers is a reference fiber and the other fiber constitutes a...
4355310 Well logging communication system  
A communication system capable of continuously exchanging digital information in a well logging installation between apparatus arranged on the earth's surface and apparatus arranged in an earth...
4312051 Data display  
Sample and hold circuits are utilized to divide data stored in memory into a plurality of channels for display. First-in-first-out buffers are utilized to compensate for the difference between the...
4308598 Simplified roll along switching  
A seismic prospecting roll along switch incorporating electronically controlled switches in an improved switch arrangement requiring far fewer switches than previous systems. In a simple form, one...
4296484 Data display system  
A display system is provided in which the data from a plurality of data channels is displayed on a cathode ray tube (CRT) display device. Automatic gain control is utilized to ensure that...
4285052 Roll-along switch  
The electronic roll-along switch consists of several input multiplexers, each having a number of inputs that are connected to seismic detectors, and an output line. A plurality of multiple-input...
4241330 Multiple-processor digital communication system  
A digital communication system is disclosed for communicating among two central consoles and a plurality of local controllers, such as may be used in a radiation and monitoring system and the like....
4231015 Multiple-processor digital communication system  
A digital communication system is disclosed for communicating among two central consoles and a plurality of local controllers, such as may be used in a radiation and monitoring system and the like....
4203090 Transponder system including an oscillator ripple counter controlling a coded analog multiplex network in a circuit with a driver/gate circuit for generating red-alert end condition digital signals in a storage tank gauging system  
A "red-alert" end condition digital signal is generated by a transponder system of the present invention formed essentially of MSI's (Medium Scale Integrated Chips) including an oscillator/ripple...
Matches 1 - 34 out of 34