MULTIPOLE ANTENNAE FOR LOGGING-WHILE-DRILLING RESISTIVITY MEASUREMENTS
First Claim
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1. A multipole antenna for conducting logging-while-drilling (LWD), the antenna comprising:
- a wire for one of producing and receiving an electromagnetic field, the wire comprising at least one winding for providing a magnetic moment in a first portion of the antenna that is opposite to the magnetic moment of a second portion of the antenna.
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Abstract
A multipole antenna for conducting logging-while-drilling (LWD), includes a wire for one of producing and receiving an electromagnetic field, the wire having at least one winding for providing a magnetic moment in a first portion of the antenna that is opposite to the magnetic moment of a second portion of the antenna. A method for constructing the multipole antenna is provided. A LWD tool making use of the antenna is also provided.
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Citations
16 Claims
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1. A multipole antenna for conducting logging-while-drilling (LWD), the antenna comprising:
a wire for one of producing and receiving an electromagnetic field, the wire comprising at least one winding for providing a magnetic moment in a first portion of the antenna that is opposite to the magnetic moment of a second portion of the antenna. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An axially oriented multipole antenna for a well logging tool, the antenna comprising:
a wire for one of producing and receiving an electromagnetic field, the wire comprising at least one winding for providing a magnetic moment in a first portion of the antenna that is opposite to the magnetic moment of a second portion of the antenna; wherein the wire is disposed about a circumference of the tool.
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9. A transversely oriented multipole antenna for well logging, the antenna comprising:
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a wire for one of producing and receiving an electromagnetic field, the wire comprising at least one winding for providing a magnetic moment in a first portion of the antenna that is opposite to the magnetic moment of a second portion of the antenna; wherein the wire is disposed about a length of the tool.
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10. A method for constructing a multipole antenna for conducting logging-while-drilling (LWD), the method comprising:
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selecting a wire for producing the antenna; fabricating the antenna by providing at least one winding in the wire such that when the antenna is used for one of producing and receiving an electromagnetic field, the wire provides for a magnetic moment in a first portion of the antenna that is opposite to the magnetic moment of a second portion of the antenna. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A tool for performing logging-while-drilling (LWD), the tool comprising:
a multipole antenna comprising a wire for one of producing and receiving an electromagnetic field, the wire comprising at least one winding for providing a magnetic moment in a first portion of the antenna that is opposite to the magnetic moment of a second portion of the antenna.
Specification