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AssigneeBaker Hughes Incorporated
InventorsLouis H. Rorden, Ashok Patel, James V. Leggett, III, Frank Lindsay Gibbons, Steven C. Owens
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A transducer is described especially for use in providing acoustic transmission in a borehole. The transducer includes a multiple number of magnetic circuit gaps and electrical windings that have been found to provide the power necessary for acoustic operation in a borehole while still meeting the stringent dimensional criteria necessitated by boreholes. Various embodiments conforming to the design are described. Moreover, the invention includes transition and reflector sections, as well as a directional coupler and resonator arrangement particularly adapted for borehole acoustic communication. An acoustic communication system is described especially designed for use in providing acoustic transmission of information in a borehole. The communication system comprises a surface transceiver and at least one downhole transceiver. The surface transceiver operates in conjunction with a host computer that sends commands to the downhole transceiver. Subsequently, the downhole transceiver transmits encoded data from subsurface, borehole sensors to the surface transceiver. The preferred embodiment uses Minimum Shift Keying (MSK) modulation for both transmitting commands to the downhole unit and for transmitting data to the surface transceiver. To facilitate operation of a coherent communication system in the inhospitable environment of a borehole, the acoustic channel is characterized to enable the system to choose the best possible frequency and bandwidth for communication transmission. Additionally, the system achieves synchronous operation by transmitting synchronization signals between the downhole transceiver and the surface transceiver prior to the units exchanging commands and data.
In communication in an oil and/or gas system, a method of communicating data between two locations using travel of acoustic waves in a transmission medium, comprising:
A method of transmitting data in an oil and/or gas system between a first communication device at a first communication node and a second communication device at a second communication node through a communication channel defined at least in part by said oil and/or gas system, comprising:
An apparatus for transmitting data in an oil and/or gas system between a first communication device at a first communication node and a second communication device at a second communication node through a communication channel defined at least in part by said oil and/or gas system, comprising:
An acoustic communication apparatus in an oil and/or gas system for communication through a communication channel for acoustic communication between a first communication node and a second communication node, comprising:
An acoustic communication apparatus for use during drilling operations in a wellbore having a drillstring disposed therein composed of a drill pipe section and a drill collar section, with a communication channel for acoustic communication between a first communication node and a second communication node, comprising:
In borehole communication, a method of preparing for communicating data between two locations, at least one of which is within a borehole, using travel of acoustic waves in a transmission medium which extends at least in part into a downhole location, comprising:
In borehole communication, a method of communicating data between two locations using travel of acoustic waves in a communication channel, comprising the steps of:
In borehole communication, a method of communicating data between two locations using acoustic waves in at least one transmission medium extending at least in part in said borehole, including the steps of:
A method of detecting an influx into a wellbore utilizing a communication channel in said wellbore, comprising:
An apparatus for detecting an influx into a wellbore utilizing a communication channel, comprising:
Dependencies are inferred from the claim text.