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7382686 |
Drilling signalling system
A pressure pulse generator for use in transmitting pressure signals to surface in a fluid-based drilling system having a housing having an inlet to admit drilling fluid to the interior of housing,...
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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...
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7336199 |
Inductive coupling system
An inductive coupling system including a mandrel and an inner sleeve and outer housing that surround and rotate relative to the mandrel. The system also includes a mandrel electronics system and a...
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7327634 |
Rotary pulser for transmitting information to the surface from a drill string down hole in a well
A rotary pulser for transmitting information to the surface from down hole in a well by generating pressure pulses encoded to contain information. The pressure pulses travel to the surface where...
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7325605 |
Flexible piezoelectric for downhole sensing, actuation and health monitoring
Thin flexible piezoelectric transducers are bonded to or imbedded into oilfield tubular members or structural members. The transducers may be used to telemeter data as acoustic waves through the...
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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...
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7319638 |
Hydraulic oscillator for use in a transmitter valve
An oscillating valve driven by the pressure in a mud pulser develops a pressure variation in the mud pulse signal that is at a frequency that is different than the frequencies of the mud system....
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7315256 |
Magnetic signalling in pipelines
Method systems and apparatus for signalling within pipelines. The systems methods and apparatus make use of a unit locatable within a tubular piece of metallic structure for the transmission and/or...
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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...
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7298287 |
Transmitting data through a downhole environment
The invention is a system for transmitting data through downhole environments comprising a downhole network integrated into a downhole tool string. The downhole tool string comprises a plurality of...
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7298285 |
Rotary downlink system
A method for downlink communication with a downhole tool having a mud-powered downhole motor that includes receiving a sensor signal related to a rotational speed of a rotor in the mud-powered...
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7274304 |
System for loading executable code into volatile memory in a downhole tool
A system for loading an executable code into volatile memory in a downhole tool string component comprises a surface control unit comprising executable code. An integrated downhole network...
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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...
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7259688 |
Wireless reservoir production control
A reservoir production control system includes a plurality of wells for producing a reservoir linked to a central computer over a downhole communication network and a surface communication network....
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7257489 |
Quadrupole acoustic shear wave logging while drilling
A tool generates signals indicative a shear wave slowness of the formation surrounding a borehole. The tool comprises a collar portion adapted for mounting in a drill string, a quadrupole sonic...
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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...
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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...
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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...
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7252160 |
Electromagnetic gap sub assembly
A compact, robust, wear resistant, and high performance electrically insulating gap sub for use with borehole EM Telemetry is disclosed. In one embodiment, the gap sub may include an externally...
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7250873 |
Downlink pulser for mud pulse telemetry
A mud pulse telemetry system comprises a surface located fluid supply line having a drilling fluid flowing therein. A non-venting pulser is disposed in the drilling fluid in the supply line, and...
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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...
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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 wall,...
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7219748 |
Downhole signal source
A signaling apparatus comprises a magnet and a shield moveable relative to the magnet. The shield is moveable relative to the magnet between a first position in which the magnet is relatively...
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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...
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7158446 |
Directional acoustic telemetry receiver
Acoustic telemetry devices and methods that provide directional detection. In one embodiment, a disclosed acoustic telemetry device comprises at least two acoustic sensors and an electronics...
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7158049 |
Wireless communication circuit
The invention includes a wireless communication circuit and a method of communicating with wireless signals that feature a tank circuit having an inductor connected in parallel with a capacitor...
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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...
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7145834 |
Well bore communication pulser
The preferred pulser is a mud powered oscillator powered by the pressure variation produced across the signal valve by the unstable action. The signal valve comprises a poppet and cooperating...
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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...
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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...
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7132904 |
Apparatus for reducing noise
An apparatus for electromagnetically connecting surface equipment to a rotating downhole tool string comprises a plurality of electrical conductors, first and second differential interfaces, and at...
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7126492 |
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...
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7114561 |
Wireless communication using well casing
A petroleum well having a borehole extending into a formation is provided. A piping structure is positioned within the borehole, and an induction choke is positioned around the piping structure...
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7098802 |
Signal connection for a downhole tool string
A signal transmission connection for a tool string used in exploration and production of natural resources, namely: oil, gas, and geothermal energy resources. The connection comprises first and...
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7093680 |
Subsurface signal transmitting apparatus
An insulator for a subsurface signal transmitting apparatus. The insulator includes a housing, a mandrel axially disposed inside the housing, a first insulating material disposed between the...
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7084782 |
Drill string telemetry system and method
A telemetry system and method for communicating information axially along a drill string comprised of a drive train supported within a housing. The system includes an axial conducting loop formed...
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7075454 |
Power generation using batteries with reconfigurable discharge
A petroleum well for producing petroleum products that incorporates a system adapted to provide power to a downhole device in the well. The system includes a current impedance device and a downhole...
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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...
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7068183 |
Drill string incorporating an acoustic telemetry system employing one or more low frequency acoustic attenuators and an associated method of transmitting data
A drill pipe forms an acoustic transmission channel for data to be transmitted from a downhole transceiver to a surface transceiver. By positioning a first low frequency acoustic attenuator between...
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7053788 |
Transducer for downhole drilling components
A robust transmission element for transmitting information between downhole tools, such as sections of drill pipe, in the presence of hostile environmental conditions, such as heat, dirt, rocks,...
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7046164 |
Method and system for well telemetry
Methods and systems for borehole telemetry are disclosed. In one embodiment, a borehole telemetry system includes a coiled tubing string that is located in the borehole. A receiver is coupled to...
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7025130 |
Methods and apparatus to control downhole tools
The present invention generally provides a downhole tool with an improved means of transmitting data to and from the tool through the use of wired pipe capable of transmitting a signal and/or power...
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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...
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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...
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6995684 |
Retrievable subsurface nuclear logging system
Systems and methods utilizing an elongated sub body adapted to receive a run-in tool within its inner bore. The run-in tool including nuclear sources and sensors to provide nuclear formation...
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6985086 |
Method and apparatus for LWD shear velocity measurement
The logging tool of this invention includes a transmitter conveyed on a drilling collar for exciting a quadrupole signal in a borehole being drilled by a drill bit and a receiver for receiving the...
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6975243 |
Downhole tubular with openings for signal passage
Systems and methods for downhole communication and measurement utilizing an improved metallic tubular having an elongated body with tubular walls and a central bore adapted to receive a run-in...
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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...
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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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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...
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