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9007231 Synchronization of distributed measurements in a borehole  
A system and method to synchronize distributed measurements in a borehole are described. The system includes a plurality of wired segments coupled together by couplers and a plurality of nodes...
8773277 Routing facility for a subsea electronics module  
A routing facility (1) for a subsea electronics module (7) has on a single circuit board (2) a facility (5) for routing data packets between segments of a differential serial bus, and at least one...
8749398 Methods for clock synchronization in wellbore instruments  
A method for synchronizing a clock in a device at the Earth's surface with a device disposed in a wellbore includes generating a time datum for a signal generated at at least one of the surface...
8704677 Reliable downhole data transmission system  
A downhole signal transmission system provides electric radiofrequency signals that are coupled to electrically conductive or non-conductive fluids through electrical insulators. A plurality of...
8453723 Control of well tools utilizing downhole pumps  
A method of selectively actuating from a remote location multiple downhole well tools includes: selecting one of the well tools for actuation by applying a voltage polarity to a set of conductors...
8378839 Methods for clock synchronization in wellbore instruments  
A method for synchronizing a clock in a device at the Earth's surface with a device disposed in a wellbore includes generating a time datum for a signal generated at at least one of the surface...
8350716 System and method for communicating data between wellbore instruments and surface devices  
A method for communicating signals between an instrument in a wellbore and a device at the Earth's surface using a wired drill pipe telemetry channel includes allocating signals generated by at...
8350715 Pulse signaling for downhole telemetry  
Mud pulse telemetry systems and methods that employ some combination of modulated pulse positions, modulated pulse widths, and modulated pulse amplitudes to increase telemetry data rates. In at...
8284073 Downlink while pumps are off  
A system and method for communicating with a downhole tool is disclosed. In one embodiment, a telemetry system for communicating with a downhole tool in a wellbore includes a first electrode. A...
8242929 Wireless drill string telemetry  
A communication module for transfer of information along a drill string has at least one antenna coil, wherein the communication module is configured such that a central coil axis of the antenna...
8242928 Reliable downhole data transmission system  
A downhole signal transmission system provides electric radiofrequency signals that are coupled to electrically conductive or non-conductive fluids through electrical insulators. A plurality of...
8130118 Wired tool string component  
A system is disclosed as having first and second tubular tool string components. Each component has a first end and a second end, and the first end of the first component is coupled to the second...
8078328 System, program product, and related methods for performing automated real-time reservoir pressure estimation enabling optimized injection and production strategies  
Systems, program product, and methods for providing real-time reservoir management of one or more reservoirs across one or more fields are provided. A system can include multiple monitoring wells...
8022839 Telemetry subsystem to communicate with plural downhole modules  
A system for use in a wellbore includes plural modules for positioning in the wellbore and including respective interfaces, where the plural modules are configured to perform predefined downhole...
7852232 Downhole tool adapted for telemetry  
A cycleable downhole tool such as a Jar, a hydraulic hammer, and a shock absorber adapted for telemetry. This invention applies to other tools where the active components of the tool are displaced...
7696900 Apparatus for responding to an anomalous change in downhole pressure  
A method of responding to an anomalous change in downhole pressure in a bore hole comprises detecting the anomalous change in downhole pressure, sending a signal along the segmented...
RE41173 System for use in controlling a hydrocarbon production well  
A system for use in controlling a hydrocarbon production well has a: computer at a control location remote from a well tree of the well. A processor at the well tree applies control signals to and...
7649475 Tool string direct electrical connection  
A downhole electrical transmission system having first and second tubular bodies coupled together by mating threads, each tubular body having a bore. An electrical conductor assembly is disposed...
7586313 Determining electrical characteristics of an electrical cable  
To characterize an electrical cable that is deployed in a well, a voltage input is applied to the electrical cable at an earth surface location, where the well extends from the earth surface...
7570175 Node discovery in physically segmented logical token network  
Token authorized node discovery between a plurality of store-and-forward nodes in a downhole networking environment and respective applications for data processing and communication are described...
7535377 Wired tool string component  
A system is disclosed as having first and second tubular tool string components. Each component has a first end and a second end, and the first end of the first component is coupled to the second...
7518527 Extended range emf antenna  
A measuring while drilling system typically has a metal pipework extending underground connected to an antenna. The metal pipework and the antenna are both connected to a type of downhole...
7480207 Filtering and detection of telemetry  
The specification discloses systems and methods that provide improved capability to detect and decode encoded telemetry data. More particularly, the specification discloses embodiments for...
7453372 Identification of the channel frequency response using chirps and stepped frequencies  
The transfer function of the communication channel in a mud pulse telemetry system is determined by sending a known signal through the channel and spectral analysis of the received signal. The...
7453768 High-speed, downhole, cross well measurement system  
In one aspect of the invention, a high-speed measurement system has a first and a second well bore. A first and second plurality of network nodes is integrated into and spaced at intervals along...
7301472 Big bore transceiver  
In a subterranean well completion a bi-directional signal transmission system includes an in-line acoustic transceiver mounted in a tubing string extending through the wellbore, the transceiver...
7224289 Slickline data transmission system  
A slickline data transmission system for a high pressure oil-field well comprises inductive couplers at opposite ends of a slickline in order to establish real-time radio communication between...
7224288 Link module for a downhole drilling network  
A repeater is disclosed in one embodiment of the present invention as including a cylindrical housing, characterized by a proximal end and a distal end, and having a substantially cylindrical...
7193526 Downhole tool  
A double shouldered downhole tool connection comprises box and pin connections having mating threads intermediate mating primary and secondary shoulders. The connection further comprises a...
7170423 Electromagnetic MWD telemetry system incorporating a current sensing transformer  
An electromagnetic telemetry system for transmitting data from a downhole assembly, which is operationally attached to a drill string, to a telemetry receiver system. The data are typically...
6970099 Apparatus, system, and method for detecting and reimpressing electrical charge disturbances on a drill-pipe  
A signal repeater, a system utilizing one or more signal repeaters, and a method for detecting a transient disturbance in the surface charge on drill pipe, which system, apparatus and method are...
6798350 Method for repeating messages in long intelligent completion system lines  
A method for two-way communication for controlling production from a formation having at least one producing well and a plurality of producing zones. In one embodiment, the method comprises...
6464011 Production well telemetry system and method  
A downhole production well control system is provided for automatically controlling downhole tools in response to sensed selected downhole parameters. The production well having a production...
6462672 Data acquisition apparatus  
There is provided a data acquisition apparatus for use in a wellbore, having a receiver attached to an elongate electrical connector for conveying signals from downhole to surface, and a plurality...
6369718 Oil well monitoring and control system communication network  
A method and apparatus for implementing a communication network for well monitoring and control applications where a twisted pair cable bus is used to connect well-related locations. The twisted...
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...
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...
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...
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...
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...
5914911 Method of recovering data acquired and stored down a well, by an acoustic path, and apparatus for implementing the method  
In a well (10) in production or undergoing tests, the recovery of data acquired and stored in a downhole unit (16) located in the lower part of a drillpipe string (12) below a test valve (20) is...
4845493 Well bore data transmission system with battery preserving switch  
An improved method and apparatus of transmitting data signals within a well bore having a string of tubular members suspended within it, employing an electromagnetic field producing means to...
4788544 Well bore data transmission system  
An improved method and apparatus of transmitting data signals within a well bore having a string of tubular members suspended within it, employing an electromagnetic field producing means to...
4584675 Electrical measuring while drilling with composite electrodes  
Discloses a two-way telemetry system and method for transmitting data taken at the bottom of a well bore to the earth's surface with one part of the telemetry circuit being the metallic drilling...
4532614 Wall bore electrical generator  
Discloses a well bore electrical generator for a subsurface measuring system incorporating a rotary liquid seal protection system adapted to be actuated by flow of drilling mud through the drill...
4220381 Drill pipe telemetering system with electrodes exposed to mud  
A drill string telemetry system of the hard-wired type wherein a separate conductor extends through each section of the drill pipe. The conductor is connected to connectors located in the ends of...
4215426 Telemetry and power transmission for enclosed fluid systems  
The system is described in connection with the control of downhole oil well drilling tools or instruments used in the oil drilling industry. Control wiring extends through the drill pipe employing...
4087781 Electromagnetic lithosphere telemetry system  
A lithospheric electromagnetic telemetry system specifically adapted for telemetry of oil well drilling parameters from well bottom to surface of the earth. Sensors measure such parameters as...

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