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8982667 Acoustic telemetry stacked-ring wave delay isolator system and method  
A stacked-ring, slow-wave acoustic telemetry isolation system and method for use with tubular assemblies such as drillpipe or production tubing comprising an acoustic wave transmitter, the...
8981958 Electric field communication for short range data transmission in a borehole  
The present invention concerns application of a unique conductive electrode geometry used to form an efficient wideband, one- or two-way wireless data link between autonomous systems separated by...
8789620 Method and apparatus for transmitting or receiving information between downhole equipment and surface  
The invention provides a method of receiving and/or transmitting information in a well drilled in a geological formation between a first location and a second location, the well comprising a...
8559272 Acoustic logging while drilling tool having raised transducers  
An acoustic logging while drilling tool includes an acoustic transmitter and a linear array of acoustic receivers. At least one of the transmitter and the linear array of receivers is deployed on...
8552884 Power and signal distribution system  
A power and signal distribution system comprises a converter unit connected to a plurality of control units. The converter unit and the control units are arranged in areas difficult to access, for...
8525690 Synchronized telemetry from a rotating element  
A top drive assembly may comprise a drive motor that provides rotational torque to a drill string for driving the drill string into the earth. A sensor and a transmitter may be located on a...
8305229 System for wireless communication along a drill string  
A wireless communication and drill string telemetry system. The communication system is used for communicating information along a drill string between a boring tool and a boring machine. An...
8258976 Electric field communication for short range data transmission in a borehole  
The present invention concerns application of a unique conductive electrode geometry used to form an efficient wideband, one- or two-way wireless data link between autonomous systems separated by...
7830273 Sensor networks for pipeline monitoring  
A sensor network for monitoring of a pipeline comprises a sensor disposed for monitoring of a pipeline, the sensor capable of acquiring data related to the pipeline and communicating sensor data;...
7806180 Signalling systems and methods for communicating with a downhole location in a well installation  
Methods and systems are described for communicating with downhole locations and transmitting power to downhole locations. Use is made of a cable passing someway down into the well. This cable may...
7652592 Data transmission device  
The device relates to an installation comprising a cavity extending from the surface of the ground and provided with at least one electrically conductive tubular element. The device comprises a...
7649474 System for wireless communication along a drill string  
A wireless communication and drill string telemetry system. The communication system is used for communicating information along a drill string between a boring tool and a boring machine. An...
7537053 Downhole electrical connection  
In one aspect of the invention, a downhole power generation assembly has a downhole tool string component comprising a bore. A collar is rotatably supported within the bore and has a centralized...
7424176 Optical fiber termination apparatus and methods of use, and optical fiber termination process  
Apparatus and methods for terminating and anchoring fiber optic connections are disclosed. One apparatus includes a sealed body enclosing a passage for one or more optical fibers terminating in...
7348892 Pipe mounted telemetry receiver  
Methods and apparatus for receiving a telemetry signal with a receiver that is moveably disposed within a drillstring. In certain embodiments, the system comprises a surface module coupled to the...
7324011 Method and system for pipeline communication  
A pipeline communication system and method includes a pipeline having a surface extending along at least a portion of the length of the pipeline. A conductive bus is formed to and extends along a...
7256707 RF transmission line and drill/pipe string switching technology for down-hole telemetry  
A modulated reflectance well telemetry apparatus having an electrically conductive pipe extending from above a surface to a point below the surface inside a casing. An electrical conductor is...
7257050 Through tubing real time downhole wireless gauge  
A telemetry system having: a pipe; a SCADA box acoustically coupled to the pipe; and a gauge inserted in the pipe, the gauge comprising: an acoustic wave generator; a coupler mechanically...
7253745 Corrosion-resistant downhole transmission system  
An apparatus in accordance with the invention may include a downhole tool and a data transmission path incorporated into the downhole tool. The data transmission path may include one or more...
7228902 High data rate borehole telemetry system  
A system and method for communicating information between downhole equipment in a wellbore and surface equipment, comprising a first device disposed in a wellbore for receiving at least one first...
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...
7154412 High-power well logging method and apparatus  
A power delivery system for a wireline tool includes two independent power transmission loops operating on a standard six-conductor cable. The two loops each connect directly to a respective...
7132958 Downhole telemetry system using multiple uplink modes as data channels using discrete multi-tone modulation  
A method and a downhole telemetry system a downhole telemetry system using discrete multitone modulation for transmitting a data stream over a plurality of transmission modes is provided. The...
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 a...
7006009 Servicing system for wells  
A well servicing system includes a computer-based system that monitors pumping or other service operations at a well site and monitors deliveries and withdrawals of chemicals at a bulk storage...
6888473 Repeatable reference for positioning sensors and transducers in drill pipe  
A drill pipe having a box end having a tapered thread, and an internal shoulder and an external face for engagement with a drill pipe pin end having a tapered mating thread, and an external...
6866306 Low-loss inductive couplers for use in wired pipe strings  
A first flux-loop inductive coupler element electrically couples with a second flux-loop inductive coupler element. The first flux-loop inductive coupler element comprises a first ring-like core...
6864801 Reservoir monitoring through windowed casing joint  
An apparatus and a method for controlling oilfield production to improve efficiency includes a remote sensing unit that is placed within a subsurface formation, an antenna structure for...
6761219 Casing conveyed perforating process and apparatus  
A process and apparatus for completing a subterranean well bore in at least one subterranean formation. At least one perforating gun assembly is positioned on the outside of casing in a...
6727828 Pressurized system for protecting signal transfer capability at a subsurface location  
A system for protecting the transmission of signals from and/or to a tool in a high pressure environment. The system includes a tool connected to a signal transmission line, such as an electrical...
6715550 Controllable gas-lift well and valve  
A gas-lift well having a controllable gas-lift valve is provided. The well uses the tubing and casing to communicate with and power the controllable valve from the surface. Induction chokes at the...
6659174 System and method of tracking use time for electric motors and other components used in a subterranean environment  
A component, such as an electric motor, for use in a subterranean environment. The component comprises an attached recording system to record the cumulative use time of the component. The...
6628206 Method and system for the transmission of informations by electromagnetic wave  
A method and a system for the transmission of information from a well (1; 20) drilled through geological formation layers (3) at least partly cased by metal tubes (4; 23; 24; 31). The method...
6614360 Measurement-while-drilling acoustic system employing multiple, segmented transmitters and receivers  
An acoustic MWD system comprises at least one transmitter array and at least one receiver array spaced axially along an essentially tubular downhole subassembly. Each transmitter and receiver...
6515592 Power and signal transmission using insulated conduit for permanent downhole installations  
An apparatus and method is presented for establishing electrical connection to permanent downhole oilfield installations using an electrically insulated conducting casing. Current is caused to...
6498568 Pipeline communication system  
A pipeline communication system. The system uses the pipeline and the adjacent ground and includes branches with junctions. Governor modules and transformers/rectifiers form part of the network....
6070662 Formation pressure measurement with remote sensors in cased boreholes  
The present invention relates to a method and apparatus for establishing communication in a cased wellbore with a data sensor that has been remotely deployed, prior to the installation of casing...
5945923 Device and method for transmitting information by electromagnetic waves  
A device and method for transmitting information between a well bottom and the surface by means of electromagnetic waves. The device includes transmitting information on either side of a valve (9)...
5818352 Well data telemetry system  
A well data telemetry system for transmitting data along at least a part of a well bore containing tubing of magnetically permeable material comprises a transmitting coil located to transmit a...
5576703 Method and apparatus for communicating signals from within an encased borehole  
A method and apparatus for communicating signals from within an encased borehole including a wireless communications system for transmitting down-hole environmental data signals between a...
5512889 Downhole instruments for well operations  
Pressure and temperature signals are transmitted between a predetermined point in a wellbore and the earth's surface by an electromagnetic wave transmitter disposed in the well and connected to a...
5491644 Cell engineering tool and methods  
A cell engineering tool (10) evaluates wireless communications channels within and around architectural structures, such as buildings, in order to determine communications transfer...
5396232 Transmitter device with two insulating couplings for use in a borehole  
In order to enable information such as the results of physical measurements performed downhole in an oil well during testing or production to be transmitted in real time to a receiver on the...
5394141 Method and apparatus for transmitting information between equipment at the bottom of a drilling or production operation and the surface  
Information can be transmitted between equipment at the bottom of a drilling operation and the surface. A transceiver is provided at the surface, and is connected to both the earth, or the bottom...
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...
4845494 Method and apparatus using casing and tubing for transmitting data up a well  
Method and apparatus for transmitting data uphole in a well to the top of the well. A string of electrically conductive tubing and a tool connected to the tubing are lowered down the well along...
4821035 Method and apparatus using a well casing for transmitting data up a well  
A tool with a switch is inserted and moved down the inside of tubular-shaped and electrically conductive casing in the well. Spaced apart contacts on the tool are connected between upper and lower...
4812812 Apparatus and method for determining the position and orientation of a remote object  
An apparatus and method for determining the position and orientation of a remote object in relation to an observation point comprises a transmitter for sending a magnetic field signal and a...
4739325 Apparatus and method for down-hole EM telemetry while drilling  
An MWD EM data/control telemetry link between down-hole instruments and ground surface instruments dynamically adapts to the underground electrical environment utilizing a down-hole microprocessor...
4736298 Method of detecting collars using computerized pattern recognition  
A method of determining the location and dimensions of collars present along a section of casing. An inspection instrument is passed through the casing section generating an electromagnetic wave...
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