US PATENT SUBCLASS 340 / 853.1
WELLBORE TELEMETERING OR CONTROL (E.G., SUBSURFACE TOOL GUIDANCE, DATA TRANSFER, ETC.)

Current as of: June, 1999
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340 /   HD   COMMUNICATIONS: ELECTRICAL

853.1WELLBORE TELEMETERING OR CONTROL (E.G., SUBSURFACE TOOL GUIDANCE, DATA TRANSFER, ETC.) {14}
853.2  DF  .~> Diagnostic monitoring or detecting operation of communications equipment or signal
853.3  DF  .~> Selective control of subsurface equipment {2}
853.7  DF  .~> Repeater in subsurface link (e.g., cable, etc.)
853.8  DF  .~> With orientation sensing of subsurface telemetering equipment (other than drilling equipment)
853.9  DF  .~> Including detail of subsurface signal storage (e.g., memory, recorder, register, etc.)
854.1  DF  .~> With position or depth recording (e.g., line payout, equipment locator, etc.) {1}
854.3  DF  .~> Using a specific transmission medium (e.g., conductive fluid, annular spacing, etc.) {4}
855.3  DF  .~> Multiplexed signals
855.4  DF  .~> Pulse or digital signal transmission {1}
855.7  DF  .~> Modification of signal bandwidth, frequency, or circuit impedance at subsurface location
855.8  DF  .~> Including specified power transmission feature or source (e.g., battery, etc.) {1}
856.1  DF  .~> In horizontal or inclined passage arrangement
856.2  DF  .~> With expandable or inflatable sensor element or mounting
856.3  DF  .~> Including particular sensor {1}

DEFINITION

Classification: 340/853.1

WELLBORE TELEMETERING OR CONTROL (E.G., SUBSURFACE TOOL GUIDANCE, DATA TRANSFER, ETC.):

(under the class definition) Subject matter wherein an information or control signal is transmitted to or from equipment located in an opening into the earth, for a well or wellbore, over an information transmission link.

(1) Note. One of either the downhole equipment or transmission link must be described as to electrically conduct or process an information or control signal so as to meet the class definition.

(2) Note. The telemetering may be of either a pre-existing or a concurrently produced wellbore.

SEE OR SEARCH THIS CLASS, SUBCLASS:

870.01+, for telemetering equipment other than in a subsurface device.

SEE OR SEARCH CLASS

73, Measuring and Testing,

152.01+, for borehole or drilling testing, per se, not involving a purely electrical test or a purely magnetic test. 166, Wells,

250.01+, for well processes including signalling equipment; and subclass 66 for well apparatus including electrical signalling.

367, Communications, Electrical: Acoustic Wave Systems and Devices,

81+, for electrical wellbore telemetering systems in which the signal is transmitted in the form of an acoustic wave.