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. 19, 2022
Filed:
Apr. 26, 2021
Halliburton Energy Services, Inc., Houston, TX (US);
Xiaoguang Allan Zhong, Carrolton, TX (US);
Shobeir Pirayeh Gar, Carrolton, TX (US);
David Allen Dockweiler, Carrolton, TX (US);
Halliburton Energy Services, Inc., Houston, TX (US);
Abstract
A valve assembly employed in subterranean wellbore systems includes a flapper member biased to a closed position by a pair of opposed wire springs. The wire springs provide sufficient torque to ensure robust operation of the flapper member and permit sufficient fluid flow through the limited space available in the valve assembly. A pair of symmetrical pair of wire springs may be robustly manufactured and individually installed without unnecessary accumulation of manufacturing tolerances or errors, thereby providing predictable torque levels to the flapper member. The wire springs may be secured in blind holes or other features defined in a circumferential surface of the flapper member to ensure the springs remain engaged with the flapper member throughout the operation of the valve assembly.