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:
Aug. 30, 2022
Filed:
Jun. 11, 2019
Downhole Products Limited, Aberdeen, GB;
Alexander Craig Mackay, Aberdeen, GB;
DOWNHOLE PRODUCTS LIMITED, Park Portlethen, GB;
Abstract
A toe valve for use in a wellbore includes: a tubular mandrel having couplings at longitudinal ends thereof for assembly as part of a casing or liner string; a housing extending along a periphery of the mandrel and mounted thereto; a valve piston disposed in an annulus formed between the housing and the mandrel, movable between an open position and a closed position, disposed between a valve port of the housing and a valve port of the mandrel in the closed position; a fastener releasably connecting the valve piston to the housing in the closed position; an atmospheric chamber forming a portion of the annulus adjacent to the valve piston; and a drive piston disposed in the annulus adjacent to a drive port of the mandrel and operable to release the valve piston.