Method and apparatus for building a tilted antenna
First Claim
1. A method of building a tilted antenna on a retrievable segment of a tool, comprising:
- forming an elliptical recess on the segment;
forming an antenna within the elliptical recess; and
forming a pattern of windows over and perpendicular to the plane of the elliptical antenna.
2 Assignments
0 Petitions
Accused Products
Abstract
Logging tools having protected tilted antennas are disclosed, along with construction methods therefor. In one method embodiment, a tilted antenna on a retrievable segment of a downhole tool is constructed by: forming an elliptical recess on the segment; forming an antenna within the elliptical recess; and forming an elliptical pattern of windows over and perpendicular to the axis of the elliptical antenna. Some tool embodiments comprise a retrievable segment of a downhole tool having an elliptical recess; an elliptical antenna disposed within the elliptical recess; and an elliptical pattern of windows formed over and perpendicular to the plane of the elliptical antenna.
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Citations
20 Claims
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1. A method of building a tilted antenna on a retrievable segment of a tool, comprising:
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forming an elliptical recess on the segment; forming an antenna within the elliptical recess; and forming a pattern of windows over and perpendicular to the plane of the elliptical antenna. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A logging while drilling tool comprising:
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a cylindrical body having a tilted recess around its circumference; a tilted antenna disposed within the recess; and a cover over the recess having a pattern of windows aligned with the tilted antenna, wherein the windows have edges perpendicular to the plane of the tilted antenna. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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15. A retrievable downhole tool that comprises:
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at least one tilted antenna at least partly protected beneath one or more conductive surfaces having windows or gaps aligned with the tilted antenna, wherein the window or gap edges nearest to the tilted antenna are oriented to substantially minimize current flow in a plane containing the tilted antenna. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification