|
Match
|
Document |
Document Title |
|
|
7605715 |
Electromagnetic wellbore telemetry system for tubular strings
A coaxial transmission line for an electromagnetic wellbore telemetry system comprises an outer conductive pipe, an inner conductive pipe disposed coaxially inside an axial bore of the outer...
|
|
|
7598886 |
System and method for wirelessly communicating with a downhole drill string
A system for communicating with a downhole network integrated into a downhole drill string is disclosed in one aspect of the invention as including a data transmission coupler mounted to a downhole...
|
|
|
7595737 |
Shear coupled acoustic telemetry system
A shear coupled acoustic telemetry system. An acoustic telemetry system includes a tubular string having a pressure-bearing wall and an acoustic telemetry assembly positioned external to the wall...
|
|
|
7590029 |
Methods and systems for communicating data through a pipe
An acoustic telemetry system includes a piezoelectric stack at least partially disposed within a segment of pipe, and electrical circuitry for controlling the piezoelectric stack. In response to a...
|
|
|
7518950 |
Method and apparatus for downlink communication
The present invention provides a method and system in which signals from the surface are sent by changing flow rate of the drilling fluid supplied to the drill string during drilling of a wellbore....
|
|
|
7482945 |
Apparatus for interfacing with a transmission path
A downhole communication apparatus has a signal coupler disposed in an end of a downhole tubular component. The signal coupler has a transceiver portion and a conductor portion. A data conductor...
|
|
|
7468678 |
Downhole telemetry system for wired tubing
A communications system employing discrete multi-tone (“DMT”) modulated signals on a communications channel formed by inductively-coupled pipe. In one embodiment, the communications system...
|
|
|
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...
|
|
|
7436320 |
Sensor system and method of communicating data between a downhole device on a remote location
Disclosed herein is a sensor system having a sensor and at least one communication line operable with the sensor. The transmission medium is configured to convey data transmitted by the sensor to a...
|
|
|
7429934 |
Mud pulse landing assembly for use in directional drilling
A mud pulse landing assembly ( 10 ) which allows for the removal of the mud pulse generator ( 16 ) containing the mud pulse orifice ( 106 ), thus creating an unobstructed passageway for any tool or...
|
|
|
7423550 |
Two sensor impedance estimation for uplink telemetry signals
Measurements made with dual sensors (flow rate or pressure) are used to attenuate pump noise in a mud pulse telemetry system.
|
|
|
7400262 |
Apparatus and methods for self-powered communication and sensor network
A system for communicating between a first location and a second location comprises a jointed tubular string having a first section and a second section connected at a connection joint, with the...
|
|
|
7339494 |
Acoustic telemetry transceiver
One embodiment includes an apparatus that includes a piezoelectric transducer to generate an acoustic signal that is to modulate along a mandrel, wherein the piezoelectric transducer includes at...
|
|
|
7324010 |
Acoustic telemetry systems and methods with surface noise cancellation
Acoustic telemetry systems and methods with surface noise cancellation. One illustrative embodiment may include an acoustic telemetry system comprising a transmitter configured to generate an...
|
|
|
7301473 |
Receiver for an acoustic telemetry system
One embodiment includes a method comprising receiving an acoustic signal that is propagated along a drill string. The method also includes correlating the acoustic signal to a first stored acoustic...
|
|
|
7277358 |
Apparatus, method and system for digitally transmitting acoustic pulse gun signals
The present invention is directed to overcoming analog transmission difficulties by digitizing transducer signals at or near the transducer of an acoustic pulse gun and then transmitting the...
|
|
|
7277026 |
Downhole component with multiple transmission elements
A tubular component in a downhole tool string has a first end and a second end. The first end includes first and second inductive couplers, and the second end includes third and fourth inductive...
|
|
|
7268697 |
Laterally translatable data transmission apparatus
A data transmission apparatus having first and second electrical conductors is disclosed. The first and second electrical conductors are disposed within recesses of a first and second complementary...
|
|
|
7265682 |
Joint source-channel coding for multicarrier modulation
Methods and systems employing combined source-channel coding for multi-carrier modulation (MCM). In some embodiments, a described method comprises: estimating channel gain to noise ratio (CGNR) as...
|
|
|
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 connected...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
7145473 |
Electromagnetic borehole telemetry system incorporating a conductive borehole tubular
An electromagnetic borehole telemetry system for transmitting information between a borehole transceiver and a surface transceiver located at or near the surface of the earth. Tubulars, such as...
|
|
|
7142129 |
Method and system for downhole clock synchronization
A method and system for use in synchronizing at least two clocks in a downhole network are disclosed. The method comprises determining a total signal latency between a controlling processing...
|
|
|
7139218 |
Distributed downhole drilling network
A high-speed downhole network providing real-time data from downhole components of a drilling strings includes a bottom-hole node interfacing to a bottom-hole assembly located proximate the bottom...
|
|
|
7138929 |
Method and apparatus for enhanced acoustic mud pulse telemetry during underbalanced drilling
A method and system for telemetry through a compressible drilling fluid during underbalanced drilling is disclosed. A reflector ( 110 ) is positioned downstream from the gas inlet ( 84 ) and causes...
|
|
|
7019665 |
Polished downhole transducer having improved signal coupling
Apparatus and methods to improve signal coupling in downhole inductive transmission elements to reduce the dispersion of magnetic energy at the tool joints and to provide consistent impedance and...
|
|
|
7013989 |
Acoustical telemetry
Method, apparatus and article of manufacture for monitoring and characterizing the operation of a transducer (i.e., motor or pump) downhole. In particular, transducer RPMs are determined by...
|
|
|
6998999 |
Hybrid piezoelectric and magnetostrictive actuator
An electromechanical transducer formed by an electrical and mechanical combination of a piezoelectric device and a magnetostrictive device. The two devices are electrically coupled so that their...
|
|
|
6958704 |
Permanent downhole, wireless, two-way telemetry backbone using redundant repeaters
A system and method of communicating among devices via a piping structure using at least one induction choke about the piping structure to route a time-varying current carrying communication...
|
|
|
6956791 |
Apparatus for receiving downhole acoustic signals
The invention relates to an apparatus for receiving downhole acoustic signals, processing the signals into electric signals, then transmitting the signals wirelessly to a remote above-surface...
|
|
|
6952170 |
Hollow drilling rod for transmitting information
The invention relates to a hollow drilling rod for transmitting information, said rod being for placing in a borehole filled with drilling mud. The rod comprises an electrically conductive...
|
|
|
6940420 |
Drill string telemetry system
A drill string telemetry system comprises an acoustic reflector mounted to the surface end of the drill string. The reflector is adapted to reflect surface-generated torsional acoustic noise away...
|
|
|
6937159 |
Downhole telemetry and control system using orthogonal frequency division multiplexing
A power transmission and data communications system for use in a gas or oil well borehole is disclosed. The borehole includes a casing and a piping structure therein and at least one downhole...
|
|
|
6933856 |
Adaptive acoustic transmitter controller apparatus and method
The invention describes a method and apparatus for effectively communicating data along the acoustic channel of a subterranean well. The method comprises optimally driving an acoustic transmitter...
|
|
|
6912177 |
Transmission of data in boreholes
Data is transmitted along a borehole containing a drill stem ( 2 ) by means of a transmitter ( 6 ) which converts electric data signals to acoustic signals propagating along the drill stem ( 2 )....
|
|
|
6898149 |
Reprogrammable downhole telemetry and control system
A reprogrammable data communications system for use in a gas or oil well borehole is disclosed. The borehole includes a casing and a piping structure therein and at least one downhole equipment...
|
|
|
6891481 |
Resonant acoustic transmitter apparatus and method for signal transmission
A well system having a sensor; a controller for converting the sensor output, a signal conducting mass, an actuator for inducing an acoustic wave the signal conducting mass, a reaction mass, an...
|
|
|
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...
|
|
|
6868040 |
Wireless power and communications cross-bar switch
A petroleum well for producing petroleum products that incorporates a system adapted to controllably route communications and/or electrical power having a time-varying current through a piping...
|
|
|
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...
|
|
|
6847585 |
Method for acoustic signal transmission in a drill string
The present invention is a method of transmitting one or more acoustic signals in a drill string using PSK, ASK, FSK or MSFK. The method includes determining one or more stopbands and one or more...
|
|
|
6847304 |
Apparatus and method for transmitting information to and communicating with a downhole device
An apparatus for use in drilling or producing from a well bore, the apparatus comprising a downhole member such as a drilling device or a production device which is capable of being attached to a...
|
|
|
6804875 |
Method of mounting elastic wave generator
An elastic wave generator includes an excitation coil, a magnetostriction oscillator around which the excitation coil is wound and an oscillator support. The excitation coil is wound around the...
|
|
|
6791470 |
Reducing injection loss in drill strings
A system and method for transferring wave energy into or out of a periodic structure having a characteristic wave impedance profile at a prime frequency, the characteristic wave impedance profile...
|
|
|
6727827 |
Measurement while drilling electromagnetic telemetry system using a fixed downhole receiver
A system and method for enhancing the reception of electromagnetic (EM) waves in a fixed downhole receiver of an EM telemetry system is provided. In one embodiment, slots are formed in a portion of...
|
|
|
6697298 |
High efficiency acoustic transmitting system and method
The present invention includes a well system having a sensor; a controller for converting the sensor output, a signal conducting mass, a magnetostrictive actuator for inducing an acoustic wave the...
|
|
|
6687643 |
In-situ sensor system and method for data acquisition in liquids
An in-situ sensor system and method which measures the density of a liquid accurately with pressure sensors by measuring pressure in the liquid at two separate positions defined by a fixed...
|
|
|
6671224 |
Active reduction of tool borne noise in a sonic logging tool
A sonic logging tool that can be positioned within a fluid-filled borehole includes an axially distributed active vibration control system to reduce tool borne noise. The tool includes an acoustic...
|