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:
Sep. 08, 2026
Filed:
Apr. 05, 2024
Weatherford Technology Holdings, Llc., Houston, TX (US);
Brandon C. Goodman, Houston, TX (US);
Weatherford Technology Holdings, LLC., Houston, TX (US);
Abstract
A pressure-operated valve assembly includes an outer mandrel defining a tubing string bore, an inner mandrel arranged within the tubing string bore, a first atmospheric chamber at least partially defined by the outer mandrel, and a second atmospheric chamber at least partially defined between the outer and inner mandrels. A valve chamber is defined in the inner mandrel and in fluid communication with the tubing string bore via a valve port and with a wellbore annulus via an annulus port. An atmospheric chamber port is provided in the valve chamber and in fluid communication with the second atmospheric chamber. A hydrostatically insensitive valve is arranged within the valve chamber and includes a piston providing a head exposed to both annulus and tubing string bore pressure, and movable to expose the atmospheric chamber port to flood the second atmospheric chamber and simultaneously cause the first atmospheric chamber to collapse.