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. 13, 2015
Filed:
Feb. 05, 2013
Applicant:
Wwt International, Inc., Houston, TX (US);
Inventors:
Rudolph Ernst Krueger, V, Aliso Viejo, CA (US);
Eric O'Neal, Mission Viejo, CA (US);
Assignee:
WWT North America Holdings, Inc., Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 44/06 (2006.01); E21B 4/02 (2006.01); E21B 44/00 (2006.01);
U.S. Cl.
CPC ...
E21B 4/02 (2013.01); E21B 44/005 (2013.01);
Abstract
A down hole drilling tool for preventing overpressure strain on surface pumping equipment or a down hole drilling motor having a housing and a circulation port and four hydraulic valves positioned on the housing actively working together to effectively open the circulation port to drilling annulus at a high pressure setting and dose the circulation port to annulus at a low pressure setting, the four hydraulic valves include a high pressure setting valve, a low pressure setting valve, a control valve and a fixed setting valve.