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:
Oct. 25, 2005
Filed:
Jul. 08, 2003
Roland E. Chemali, Kingwood, TX (US);
Martin Folberth, Hannover, DE;
Tsili Wang, Katy, TX (US);
Rene Ritter, Celle, DE;
Roland E. Chemali, Kingwood, TX (US);
Martin Folberth, Hannover, DE;
Tsili Wang, Katy, TX (US);
Rene Ritter, Celle, DE;
Baker Hughes Incorporated, Houston, TX (US);
Abstract
The invention is a method and apparatus for determining an electrical property a formation surrounding a borehole with a measuring-while-drilling device. The apparatus an antenna configuration disposed along the outer face of an extendable stabilizer joined to a rotatable drill collar. Typically, two receivers and two transmitters are spaced along the longitudinal axis of the drill collar, with the two receivers spaced symmetrically in between the two transmitters. Alternatively, receivers and transmitters can be spaced along the circumference, possibly over multiple stabilizers. Multiple assemblies can be used. Data can be obtained with the transmitter-receiver assembly held in a stationary position or rotating circumferentially. Apparatus can be operated in a 'broadside' configuration, an 'endfire' configuration, or a configuration in which transmitter coils and receiver coils are oriented orthogonally to each other.