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. 19, 2003
Filed:
Jun. 05, 2000
Donald H. Van Steenwyk, San Marino, CA (US);
Robert M. Baker, The Woodlands, TX (US);
Gary A. McBroom, The Woodlands, TX (US);
Scientific Drilling International, Houston, TX (US);
Abstract
A method for downward communication in a borehole containing a pipe string, comprising the steps of: imparting a series of rotary motions to an upper portion of the string, the rotary motions representing at least two levels of a coded data sequence, the rotary motions imparted to a string upper portion effecting generally comparable motions at a lower portion of the string; the motions at the string lower portion effecting a downhole detectable condition or conditions indicative of rotation or no-rotation; detecting the condition or conditions to determine a corresponding coded data sequence; and processing corresponding data sequence to recover the imparted coded data sequence, from which a unique transmitted message is determinable.