Correction of Misalignment of Antennas in a Logging Tool
AssigneeBaker Hughes Incorporated
InventorsLuis Pelegri, Stanislav Forgang
Life of this patent
Estimating the term…
Abstract
Misalignment of the transmitter and receiver antennas of an induction logging tool is determined by positioning the logging tool with a conducting loop magnetically coupled to the transmitter antenna and/or the receiver antenna, and activating the transmitter at a plurality of rotational angles. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.
Claims17
An apparatus for evaluating an induction logging tool, the logging tool comprising:
- (a) a source configured to activate a transmitter antenna on the induction logging tool;
- and
- (b) a receiver antenna configured to produce a signal in response to the activation of the transmitter antenna;
- the apparatus comprising:
- (c) at least one conducting loop magnetically coupled to at least one of (A) the transmitter antenna, and (B) the receiver antenna;
- wherein the signal is indicative of a misalignment angle between the transmitter antenna and the receiver antenna.
A method of evaluating an induction logging tool, the method comprising:
- (a) activating a transmitter antenna on the induction logging tool;
- (b) magnetically coupling the transmitter antenna and a receiver antenna with at least one conducting loop;
- (c) using the receiver antenna to provide a signal in response to the activation of the transmitter antenna;
- (d) estimating from the signal a misalignment angle between the transmitter antenna and the receiver antenna
Dependencies are inferred from the claim text.