Schlumberger Technology Corporation

Franck Monmont

Songming Huang

Robert Tennent

Arthur H Hartog

Rogerio Tadeu Ramos

Robert J Schroeder

Craig David Johnson

Matthew R Hackworth

Benoit G Froelich

Jeffrey A Tarvin

Ian Atkinson

Yuehua Chen

Kasim Sadikoglu

A telemetry apparatus and method for communicating data from a down-hole location through a borehole to the surface is described including a light source, an optical fiber being placed along the length of the wellbore and receiving light from the light source, a transducer located such as to produce a force field (e.g. a magnetic field) across the optical fiber and its protective hull without mechanical penetration of the hull at the down-hole location, one or more sensors for measuring down-hole conditions and/or parameters, a controller to provide a modulated signal to the magnetic field generator, said modulated signal being under operating conditions representative of measurements by the one or more sensors, and an optical detector adapted to detect changes in the light intensity or polarization of light passing through the fiber.

Borehole telemetry system

A pressure-balanced electromechanical converter is described including a structure that converts displacement into electrical energy or electrical energy into displacement, said structure designed to separate an enclosed volume for an outside pressure wave channel, wherein said enclosed volume has a filtering pressure transparent connection to said outside pressure wave channel with said filtering connection be pressure transparent to static pressure or low frequency pressure waves and filtering pressure waves at higher frequencies.

Pressure-balanced electromechanical converter

Apparatuses and methods to power and communicate with downhole sensors are presented. Preferred embodiments of the present invention includes energizing a downhole sensor with a surface pressure wave generator and a downhole mechanical to electrical energy converter. Preferred embodiments of the present invention also include transmitting data measured from a downhole sensor to a surface unit through modulation of surface-generated pressure waves.

Downhole power generation and communications apparatus and method

An acoustic telemetry apparatus and method for communicating encoded digital data from a down-hole location through a borehole to the surface is described including an acoustic channel terminated at a down-hole end by a reflecting terminal (), an acoustic wave generator () located at the surface and providing an acoustic wave carrier signal through said acoustic, channel, a modulator () located down-hole to modulate amplitude and/or phase of said carrier wave in response to an encoded digital signal and one or more sensors () located at the surface adapted to detect amplitude and/or phase related information of acoustic waves traveling within said acoustic channel to determine the encoded digital data.

An acoustic telemetry apparatus and methods for communicating digital data from a down-hole location through a borehole to the surface or between locations within the borehole are described including a receiver and a transmitter linked by an acoustic channel () wherein acoustic channel has a cross-sectional area of 58 cmor less and the transmitter comprises an electro-active transducer generating a modulated continuous waveform.

A system that is usable with a subterranean well includes an assembly and a telemetry tool. The system includes an assembly that performs a downhole measurement. The system also includes a downhole telemetry tool to modulate a carrier stimulus that is communicated through a downhole fluid to communicate the downhole measurement uphole.

Borehold telemetry system

A surface mud pipeline system is described with a mechanical acoustic filter () tuned to a predetermined frequency band so as to attenuate pump noise () within this band. The filter can be combined with a Venturi constriction to provide enhanced attenuation and is used to improve signal transmission of a mud pulse telemetry system (-).

Growing community of inventors

Caldecote, United Kingdom

Franck Monmont