The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 26, 1997
Filed:
Apr. 15, 1996
Dennis Patrick Chesnutt, Houston, TX (US);
Kenneth Howard Hamlin, Houston, TX (US);
Paul Lincoln Sinclair, Clear Lake Shores, TX (US);
Abstract
A sealed, modular downhole antenna for measuring electrical characteristics of wellbore fluids and formations. An antenna includes a thin-walled curved metal tube, which houses coil of a length of conductive wire. The wire may be insulated by an insulating coating, as well as a filler that resides in the tube. The tube includes a coupling gap, to facilitate coupling electromagnetic energy through the tube, to and from the conductive wire. The tube also has a wall opening, for ends of the wire to attach to an adapter-connector. The adapter-connector includes suitable features for modular connection to an electrical cable, electrical connectors, or other electrical equipment. Features of the invention may be provided to ensure that such connection is resistive to the high pressures that are often encountered downhole. In this respect, the tube may be also coated with a sealant layer, to hermetically seal the tube, coupling gap, and junction between the adapter-connector and the tube. The sealant layer may include features to facilitate locking engagement with complimentarily sized attributes of a downhole tool.