Antenna shields
AssigneeHalliburton Energy Services, Inc.
InventorsMinh Dang Nguyen, Lay Wei Ang
Life of this patent
Estimating the term…
Abstract
A logging tool includes a tool mandrel, an antenna disposed on the tool mandrel and including one or more coil windings wrapped about the tool mandrel, an antenna shield disposed about the antenna and including at least two pieces, and a constraining element to limit rotational motion of the antenna shield about the tool mandrel. The constraining element is disposed in a through hole defined in the antenna shield and a cavity defined in the tool mandrel, and the antenna shield and the tool mandrel are coupled to each other via an interference fit between the constraining element and the through hole and the cavity.
Claims10
A logging tool, comprising:
- a tool mandrel;
- an antenna disposed on the tool mandrel and including one or more coil windings wrapped about the tool mandrel;
- an antenna shield disposed about the antenna, the antenna shield including at least two pieces;
- a fastener for removably coupling the antenna shield to the tool mandrel;
- and
- a constraining element to limit rotational motion of the antenna shield about the tool mandrel to limit torsional forces on the fastener, the constraining element disposed in a through hole defined in the antenna shield and a cavity defined in the tool mandrel, and the antenna shield and the tool mandrel being coupled to each other via an interference fit between the constraining element and the through hole and the cavity.
A method, comprising:
- introducing a logging tool into a wellbore, the logging tool including:
- a tool mandrel;
- an antenna disposed on the tool mandrel and including one or more coil windings wrapped about the tool mandrel;
- an antenna shield about the antenna, the antenna shield including at least two pieces;
- a fastener for removably coupling the antenna shield to the tool mandrel;
- and
- a constraining element to limit rotational motion of the antenna shield about the tool mandrel to limit torsional forces on the fastener, the constraining element disposed in a through hole defined in the antenna shield and a cavity defined in the tool mandrel, and the antenna shield and the tool mandrel being coupled to each other via an interference fit between the constraining element and the through hole and the cavity;
- and
- obtaining measurements of a surrounding subterranean formation with the logging tool.
Dependencies are inferred from the claim text.