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. 15, 2019
Filed:
May. 01, 2017
Comitt Well Solutions Us Holding Inc., Katy, TX (US);
Roger Antonsen, Houston, TX (US);
Peter Kris Cleven, Houston, TX (US);
Comitt Well Solutions LLC, Katy, TX (US);
Abstract
A complementary valve () for a movable string () in a wellbore application, wherein the movable string () comprises: a flow activated valve () configured to open when a flow through a central bore () is less than a predetermined threshold and to close if the flow exceeds the threshold, and a pressure activated device () configured to be activated when an activation pressure, defined as the difference between a bore pressure within the central bore () and an ambient pressure around the string (), is greater than or equal to a first activation pressure and to be deactivated when the activation pressure is less than the first activation pressure. The complementary valve () is configured to open a fluid connection () between the central bore and the ambient wellbore if the activation pressure is less than the first activation pressure, and to close the fluid connection when the activation pressure is equal to or greater than the first activation pressure. Thereby, the complementary valve () ensures that the pressure activated device () is reset after use.