|
Match
|
Document |
Document Title |
|
|
7071837 |
Data transmission in pipeline systems
Data transmission in pipeline systems A first set of apparatus is arranged for transmitting data from a point in a cased section of a well 1, 3 to a remote location. The apparatus may be used as...
|
|
|
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...
|
|
|
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...
|
|
|
6160492 |
Through formation electromagnetic telemetry system and method for use of the same
An electromagnetic telemetry system for changing the operational state of a downhole device (84) disclose. The system comprises an electromagnetic transmitter (76) disposed in a first wellbore (30)...
|
|
|
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...
|
|
|
6075462 |
Adjacent well electromagnetic telemetry system and method for use of the same
An adjacent well telemetry system for changing the operational state of a downhole device and a method for use of the system is disclosed. The system comprises an electromagnetic transmitter...
|
|
|
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...
|
|
|
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,...
|
|
|
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...
|
|
|
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...
|
|
|
4878053 |
Actuation method
A subsurface valve-actuator combination for well production tubing is described. The valve is urged to closed position but held open by a battery-operated latch of the actuator. A receiver-relay in...
|
|
|
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...
|
|
|
4736791 |
Subsurface device actuator requiring minimum power
A subsurface valve-actuator combination for well production tubing is described. The valve is urged to closed position but held open by a battery-operated latch of the actuator. A receiver-relay in...
|
|
|
4387372 |
Point gap assembly for a toroidal coupled telemetry system
An insulated point gap assembly for a toroidal coupled telemetry system wherein a drill collar (38), operable to be connected to a lower portion of a drill string (32), carries a toroidal core...
|
|
|
4322728 |
Multichannel remote transducer monitoring system
A transducer monitoring system includes a transducer assembly positioned at a remote location which operates to measure the change in at least two separate physical phenomena. The transducer...
|
|
|
4181014 |
Remote well signalling apparatus and methods
Information is conducted upwardly from a location deep within a well by a transmitter which is located in the well and induces electrical currents in the surrounding earth formation. These currents...
|
|
|
4160970 |
Electromagnetic wave telemetry system for transmitting downhole parameters to locations thereabove
A system is disclosed for transmitting information during a borehole drilling operation wherein a section of the drill string near the drill bit is utilized as a transmitting element of an...
|
|
|
4015234 |
Apparatus for measuring and for wireless transmission of measured values from a bore hole transmitter to a receiver aboveground
Apparatus for transmitting measurement information from a deep well being drilled to the surface comprises a receiving unit aboveground and a transmitting unit on a connecting section of the drill...
|
|
|
3967201 |
Wireless subterranean signaling method
A relatively low frequency wireless electromagnetic communication link is established through a subterranean lossy medium such as ground or water by launching and propagating magnetic waves of...
|
|
|
3831138 |
APPARATUS FOR TRANSMITTING DATA FROM A HOLE DRILLED IN THE EARTH
An arrangement for measuring and transmitting geological, physical, geometrical or chemical data of soil strata penetrated by a drilling hole, comprising a signal generator located inside the...
|
|
|
3737845 |
SUBSURFACE WELL CONTROL APPARATUS AND METHOD
A new and improved method and apparatus for reliably and accurately controlling one or more operations of subsurface well drilling and well control equipment, and for reducing the likelihood of...
|
|
|
3736558 |
DATA-SIGNALING APPARATUS FOR WELL DRILLING TOOLS
In the preferred embodiment of the invention disclosed herein, a well tool having new and improved data-signaling apparatus and carrying a drill bit on its lower end is dependently coupled from a...
|