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. 07, 2007
Filed:
Jul. 30, 2004
Tony Dopf, Calgary, CA;
Derek William Logan, Calgary, CA;
Paul Leonard Camwell, Calgary, CA;
Michael Nero, Houston, TX (US);
Clemens L. Horst, Houston, TX (US);
Robert E. Smallwood, Calgary, CA;
Tony Dopf, Calgary, CA;
Derek William Logan, Calgary, CA;
Paul Leonard Camwell, Calgary, CA;
Michael Nero, Houston, TX (US);
Clemens L. Horst, Houston, TX (US);
Robert E. Smallwood, Calgary, CA;
Weatherford/Lamb, Inc., Houston, TX (US);
Abstract
A compact, robust, wear resistant, and high performance electrically insulating gap sub for use with borehole EM Telemetry is disclosed. In one embodiment, the gap sub may include an externally threaded mandrel separated from an internally threaded housing by a dielectric material. Additionally, some embodiments may include an external gap ring for separating the upper and lower electrical halves of the sub which offers structural support, acts as the primary external seal, and provides an abrasion resistant non-conductive length on the exterior. Some embodiments may include torsion pins to prevent the possible unscrewing of the dielectric filled threaded sections should the dielectric material become damaged or weakened.