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US 2006/0132138 A1Published application
Two loop calibrator
AssigneeBaker Hughes Incorporated
InventorsLuis Pelegri, Stanislav Forgang, Michael Crosskno
Life of this patent
Estimating the term…
Abstract
Misalignment of the transmitter and receiver coils of an induction logging tool is determined by positioning the logging tool with a coil axially encompassing the transmitter coil and/or the receiver coil, and activating the transmitter at a plurality of rotational angles.
Claims16
An apparatus for evaluating an induction logging tool for use in a borehole, the logging tool comprising:
- (a) a current source which activates a transmitter coil on the induction logging tool;
- and
- (b) a receiver coil axially spaced apart from the transmitter coil, the receiver coil producing a signal in response to the activation of the transmitter coil;
- the apparatus comprising:
- (c) at least one conducting loop axially encompassing at least one of (A) the transmitter coil, and (B) the receiver coil;
- wherein the signal is indicative of a misalignment angle between the transmitter coil and the receiver coil.
3 more elements
A method of evaluating an induction logging tool for use in a borehole, the method comprising:
- (a) activating a transmitter coil on the induction logging tool;
- (b) using a receiver coil to provide a signal in response to the activation of the transmitter coil;
- (c) estimating from the signal a misalignment angle between the transmitter coil and the receiver coil;
- and
- (d) positioning the logging tool during the activation of the transmitter coil with at least one conducting loop axially encompassing at least one of (A) the transmitter coil, and (B) the receiver coil;
2 more elements
Dependencies are inferred from the claim text.