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:
Dec. 29, 2015
Filed:
Jun. 26, 2012
Kenneth John Stoddard, Santaquin, UT (US);
Cameron Snow Andersen, Spanish Fork, UT (US);
Garth L Mason, Springville, UT (US);
Jared M. Mangum, Highland, UT (US);
Kenneth John Stoddard, Santaquin, UT (US);
Cameron Snow Andersen, Spanish Fork, UT (US);
Garth L Mason, Springville, UT (US);
Jared M. Mangum, Highland, UT (US);
Schlumberger Technology Corporation, Sugar Land, TX (US);
Abstract
A two-step hydraulic valve is described. In an implementation, a two-step hydraulic valve with retrograde spool action has a pilot spool that controls hydraulic force applied to a main spool to switch a rod of a hydraulic actuator back-and-forth between extension and retraction. The main spool is hydraulically driven in retrograde motion to the pilot spool, providing improved reliability and switching action for the valve. The pilot spool also has an overtravel feature that can be used to hyperextend the rod for various purposes. In an example system, the two-step hydraulic valve controls a hydraulic actuator connected to drive a submersible reciprocating pump, such as a diaphragm pump.