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6968735 |
Long range data transmitter for horizontal directional drilling
An apparatus for monitoring conditions in subterranean borehole during drilling and pullback operations in real time. The apparatus includes a drill string having a working end. A measurement...
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6820693 |
Electromagnetic telemetry actuated firing system for well perforating gun
A perforating gun assembly for use in a subterranean well incorporates therein an electromagnetic frequency receiver coupled to a motor section which, in turn, is coupled to the mechanically...
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6750783 |
Low frequency electromagnetic telemetry system employing high cardinality phase shift keying
A downhole electromagnetic telemetry system with an increased data rate is provided. In one embodiment, a PSK data transmission system is used to transmit data in a downhole electromagnetic...
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EP1405680A1 |
Bending machine with rotatable bending head
The bending machine (1) for rod-shaped workpieces, and especially pipes, has a frame (2) and a tool unit (4) with at least one bending tool (11,12) on a carrier arm (28) at the side away from the...
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6640657 |
Fixture for supporting a sensing device on a movable article
A fixture for supporting a sensing device on a variety of differently sized and shaped articles and for protectively enclosing such a sensing device when the article is moved during use includes a...
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EP1184230B1 |
Wire harness
Abstract of EP1184230 The intermediate section (18) is fixed against rotation to one end fitting (14). At the second end fitting (16), the method of mounting permits relative rotation over a...
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EP1200753B1 |
ENERGY SUPPLY CHAIN
Abstract not available for EP1200753
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6534713 |
Cable set
A cable set with a protective covering enclosing a number of individual cables includes a first and a second end part and an intermediate part disposed therebetween. The intermediate part is fixed...
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6374589 |
Energy supply chain
An energy supply chain for guiding conduits such as cables, hoses or the like between a stationary and a movable connection point or between two connection points which are movable relative to each...
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EP1184230A1 |
Wire harness
The intermediate section (18) is fixed against rotation to one end fitting (14). At the second end fitting (16), the method of mounting permits relative rotation over a limited angular range (...
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6218959 |
Fail safe downhole signal repeater
A system and method of fail safe communication of information between surface equipment and downhole equipment are disclosed. The system comprises two or more repeaters (34, 35, 36) disposed within...
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6177882 |
Electromagnetic-to-acoustic and acoustic-to-electromagnetic repeaters and methods for use of same
A downhole communications system including an electromagnetic-to-acoustic signal repeater (35) for communicating information between surface equipment and downhole equipment and a method for use of...
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6175599 |
Method and apparatus for transmitting and receiving digital data over a bandpass channel
A method and apparatus for transmitting and receiving acquired digital data over bandpass channels (i.e. channels having a limited range of frequencies) at high data transmission rates. Combined...
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6144316 |
Electromagnetic and acoustic repeater and method for use of same
An electromagnetic and acoustic signal repeater (34) for communicating information between surface equipment and downhole equipment and a method for use of the repeater (34) is disclosed. The...
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6075461 |
Disposable electromagnetic signal repeater
An apparatus, method and system for communicating information between downhole equipment (40) and surface equipment is disclosed. The electromagnetic signal repeater apparatus (34, 36) comprises a...
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6018501 |
Subsea repeater and method for use of the same
A subsea repeater apparatus (48) for communicating information between surface equipment (60) and downhole equipment (44) is disclosed. The apparatus (48) comprises an electromagnetic receiver (66,...
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6018301 |
Disposable electromagnetic signal repeater
An apparatus, method and system for communicating information between downhole equipment (40) and surface equipment is disclosed. The electromagnetic signal repeater apparatus (34, 36) comprises a...
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5942990 |
Electromagnetic signal repeater and method for use of same
A downhole electromagnetic signal repeater (76) for communicating information between surface equipment and downhole equipment and a method for use of the repeater (76) is disclosed. The repeater...
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5838727 |
Method and apparatus for transmitting and receiving digital data over a bandpass channel
A method and apparatus for transmitting and receiving acquired digital data over bandpass channels (i.e. channels having a limited range of frequencies) at high data transmission rates. Combined...
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5471506 |
Method and apparatus for pulse communication
The present invention relates to telecommunication technology, and more particularly, to a method and apparatus for pulse communication wherein rectangular pulse is replaced by cosine pulse....
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EP0295178B1 |
System and method for communicating signals in a cased borehole having tubing
Abstract of EP0295178 A system and method are disclosed for wireless two-way communication in a cased borehole having tubing extending therethrough. A downhole communications subsystem is mounted...
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5236048 |
Apparatus and method for communicating electrical signals in a well, including electrical coupling for electric circuits therein
An electric coupling for two electric circuits in a well includes an electric contact and a contact receiver connected to respective ones of the circuits so that a contact/receiver pair is formed...
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5160925 |
Short hop communication link for downhole MWD system
The short hop communication link includes a sensor module positioned downhole from a motor in a well. The module includes sensors that monitor operational, directional and environmental parameters...
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5140318 |
Data transmission system for downhole logging tools
A data transmission system for use with such as the seven conductor logging cable that functions to provide more precise transmission of data signal with reduced interference from higher powered...
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4968978 |
Long range multiple point wireless control and monitoring system
A method for remotely monitoring conditions such as carbon monoxide for methane gas concentration, longwall roof support pressure, machine parameters or uncut coal, trona or potash layer thickness...
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4879755 |
Medium frequency mine communication system
A method for using an underground mine communication system to effect minewide communication and an intrinsically safe current limiter circuit for insuring that electrical equipment in the system...
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4864293 |
Inground boring technique including real time transducer
A system in which a boring tool is urged through the ground by means of a drill string in order to form an underground hole is disclosed herein along with an arrangement for obtaining certain...
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4839644 |
System and method for communicating signals in a cased borehole having tubing
A system and method are disclosed for wireless two-way communication in a cased borehole having tubing extending therethrough. A downhole communications subsystem is mounted on the tubing. The...
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4800385 |
Well data transmission system using a magnetic drill string for transmitting data as a magnetic flux signal
A well data transmitting system for use in transmission of a data signal representative of a drilling parameter sensed by a sensor in a drill string of a magnetic material at a bottom of the well...
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4796026 |
Noise tool and method
Apparatus for detecting acoustic disturbances include an electrical circuit for processing electrical signals generated by an acoustic sensor in response to acoustic disturbances. The processing...
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EP0295178A2 |
System and method for communicating signals in a cased borehole having tubing.
A system and method are disclosed for wireless two-way communication in a cased borehole having tubing extending therethrough. A downhole communications subsystem is mounted on the tubing. The...
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4725837 |
Toroidal coupled telemetry apparatus
A downhole toroidal coupled telemetry apparatus is disclosed in which the secondary winding comprises a plurality of turns wrapped around a generally annular core member.
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4684946 |
Device for transmitting to the surface the signal from a transmitter located at a great depth
A device for transmitting signals from a transmitter at the bottom of a drill well to the earth's surface including a drill collar which extends in an axial direction, a transmitter disposed in the...
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4525715 |
Toroidal coupled telemetry apparatus
A logging telemetering system comprising a toroidal coupled telemetry apparatus including a primary winding carrying bore hole data, wrapped around at last one torroid core mounted within a drill...
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