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:
Jul. 26, 2011
Filed:
Nov. 01, 2006
Daniel C. Seutter, Beaumont, CA;
Robert Diederichs, Sherwood Park, CA;
Andy Maccallum, Cochzane, CA;
Jerry Yee, Edmonton, CA;
Daniel C. Seutter, Beaumont, CA;
Robert Diederichs, Sherwood Park, CA;
Andy MacCallum, Cochzane, CA;
Jerry Yee, Edmonton, CA;
Steertek Ltd., Edmonton, AB, CA;
Abstract
A mud pulser creates pressure pulses in a stream of drilling fluid circulating through a drill string. The pulser has a body connected into the drill string, and defines a flow passage for drilling fluid. A signal poppet having a piston is reciprocally carried within the body. A lower end of the poppet selectively restricts flow of drilling fluid through an orifice and to thereby increase pressure and creates a pulse while in an extended position. An inner passage with an upward facing servo seat formed therein is located in the body and extends through the signal poppet for the passage of drilling fluid. A motor-driven servo valve selectively engages the servo seat to control flow of drilling fluid through the inner passage. A limit switch responds to axial movement of the servo valve cause the motor to turn off when the servo valve reaches predetermined axial positions.