Communications, electrical: acoustic wave systems and devices inventions 03/08

20080074948 - Downhole noise cancellation in mud-pulse telemetry: Pressure measurements are made using a pressure sensor in the proximity of the drillbit during drilling operations. A filtered version of the pressure measurements is provided to a pulser for a mud-pulse telemetry system so as to cancel pressure variations due to drilling noise while a telemetry signal is being... Agent: Madan, Mossman & Sriram, P.C.

20080074946 - Sensor mount for marine seismic streamer: A seismic streamer includes a jacket covering an exterior of the streamer. At least one strength member extends along the length of and disposed inside the jacket. At least one seismic sensor is mounted in a housing affixed to the at least one strength member. A void filling material fills... Agent: E. Eugene Thigpen Petroleum Geo-services, Inc.

20080074949 - Sensor assembly: A sensor assembly includes a seismic sensor element and a shell. The shell at least partially surrounds the sensor element to shield the sensor element from a magnetic field that is generated outside of the shell.... Agent: Jeffrey E. Griffin Westerngeco, L.L.C.

20080068928 - Method for passive seismic emission tomography: A method for seismic event mapping includes transforming seismic signals recorded at selected positions into a domain of possible spatial positions of a source of seismic events. An origin in spatial position and time of at least one seismic event is determined from space and time distribution of at least... Agent: Richard A. Fagin

20080068926 - Underwater biomass assessment device and method: A system for assessing underwater biomass that comprises a frame that can float and hold the system on a body of water; a transducer that emits and receives wave signals; a motor box, that positions the transducer below a water line; a control unit to allow a user to operate... Agent: Stites & Harbison PLLC

20080068927 - Method for an antenna angular calibration by relative distance measuring: The present invention relates to the angular calibration of passive reception systems such as sonars or active ones such as certain radars whose angular performance is inadequate. The invention proposes a method making it possible to perform antenna calibration using the detection system associated with this antenna under real operating... Agent: Lowe Hauptman & Berner, LLP

20080068929 - Oscillating shear valve for mud pulse telemetry: An oscillating shear valve system for generating pressure fluctuations in a flowing drilling fluid comprising a stationary stator and an oscillating rotor, both with axial flow passages. The rotor oscillates in close proximity to the stator, at least partially blocking the flow through the stator and generating oscillating pressure pulses.... Agent: Madan, Mossman & Sriram, P.C.

20080062814 - Discriminating natural fracture- and stress-induced sonic anisotropy using a combination of image and sonic logs: Fracture- and stress-induced sonic anisotropy is distinguished using a combination of image and sonic logs. Borehole image and sonic logs are acquired via known techniques. Analysis of sonic data from monopole P- and S-waves, monopole Stoneley and cross-dipole shear sonic data in an anisotropic formation are used to estimate at... Agent: Schlumberger-doll Research Attn: Intellectual Property Law Department

20080062815 - Single station wireless seismic data acquisition method and apparatus: A seismic data acquisition apparatus having a recorder co-located with a sensor unit in a seismic spread and a communication device for direct communication with a central recorder. A memory located in the recorder and/or in the central controller holds location parameters associated with the sensor unit, and the parameters... Agent: Paul S Madan Madan, Mossman & Sriram, PC

20080062816 - Signalling and localization device for an individual in the sea and method for use thereof: Signalling and localisation device for an individual in the sea, including an ultrasonic wave transmitter constituting an individual alarm unit carried by the individual in the sea designed to transmit carrier waves of primary signals; a surface surveillance means arranged on the surface of the sea and provided with: a... Agent: Cantor Colburn, LLP

20080056066 - Ocean bottom seismic sensor cable system including torque-relieveing swivel: An ocean bottom cable system includes a sensor cable configured to be extended from a vessel to the bottom of the body of water. The sensor cable includes a plurality of seismic sensor units at spaced apart locations. A lead in cable is coupled at a to at least one... Agent: E. Eugene Thigpen Petroleum Geo-services, Inc.

20080056067 - Method of detecting signals in acoustic drill string telemetry: A method of acoustic telemetry in a drill string in a wellbore, comprises; transmitting an acoustic signal related to a parameter of interest from a transmitting location into the drill string; detecting signals propagated through the drill string at a receiving location, where the detected signals including noise; determining a... Agent: Madan, Mossman & Sriram, P.C.

20080056068 - Apparatus and method for detecting position, and touch panel using the same: An apparatus and a method for detecting position, and a touch panel using the same are provided. The apparatus for detecting position includes a frame, a plurality of first signal sources, a plurality of first signal receivers, a plurality of second signal sources, a plurality of second signal receivers, and... Agent: Snell & Wilmer L.L.P. (main)

20080056069 - Method for optimizing the power supply for a towed linear transmit antenna for transmitting in omnidirectional mode: The invention relates to sonar transmission means and in particular to transmission means for achieving omnidirectional acoustic transmission. The invention relates to a method for achieving omnidirectional transmission using of a towed linear antenna of length L greater than the wavelength λ of the signal transmitted. The antenna has a... Agent: Lowe Hauptman & Berner, LLP