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:
May. 18, 2010
Filed:
Mar. 16, 2007
Kenneth H. Wenzel, Edmonton, AB, CA;
Kenneth H. Wenzel, Edmonton, AB, CA;
Other;
Abstract
An apparatus () for keeping a down hole drilling tool vertically uses a pendulum (). The pendulum () controls flow from outlets () of drilling fluid chambers (), providing drilling fluid to centralizer () activating pistons () acting upon centralizer blades (). When the outer housing () deviates from a vertical orientation, the pendulum () swings by force of gravity to assume an angularly offset pivotal position. This adjusts the hydraulic pressure in one or two of the outlets () for one or two of the drilling fluid chambers () resulting in a change in the hydraulic force acting upon one or two of the pistons () causing one of the centralizers () to change their position to urge the outer housing () back toward the vertical position until the pendulum () again assumes the concentric pivotal position and the balanced pressure equilibrium in the drilling fluid chambers () is restored.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile