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:
Jan. 10, 2017
Filed:
Nov. 08, 2011
Curtis Lanning, Montgomery, TX (US);
Dong Phung, Spring, TX (US);
Aaron Schen, The Woodlands, TX (US);
Jacob Riddel, Humble, TX (US);
Curtis Lanning, Montgomery, TX (US);
Dong Phung, Spring, TX (US);
Aaron Schen, The Woodlands, TX (US);
Jacob Riddel, Humble, TX (US);
NATIONAL OILWELL VARCO, L.P., Houston, TX (US);
Abstract
A valve () for controlling the flow of a drilling fluid through a down-hole tool () positionable in a wellbore penetrating a subterranean formation. The down-hole tool has a housing with a drilling motor therein and a drill bit () at an end thereof. The drilling motor () has a housing with a rotor () rotationally movable in a rotor channel () as the drilling fluid passes through a rotor channel between the housing and the rotor. The rotor has a bypass channel therethrough for bypassing a portion of the drilling fluid therethrough. The valve includes a valve plate positionable upstream of the motor. The valve plate () has at least one flow passage () and at least one bypass passage () therethrough. The flow passage is in fluid communication with the rotor channel for passing the drilling fluid therethrough. The bypass passage is in selective fluid communication with the bypass channel when the rotor rotates about the housing and moves the bypass channel into alignment with at least a portion of the bypass passage for bypassing a portion of the drilling fluid therethrough whereby a hammering effect is generated on the bit.