US 10,890,049 B2
Downhole communication valve and method of use
Mark B. Nichols, Mineral Wells, TX (US)
Assigned to COLT PETROLEUM TECHNOLOGY, LLC, The Woodlands, TX (US)
Filed by COLT PETROLEUM TECHNOLOGY, LLC, Spring, TX (US)
Filed on Dec. 14, 2018, as Appl. No. 16/220,455.
Application 16/220,455 is a continuation of application No. 15/225,928, filed on Aug. 2, 2016, granted, now 10,184,318.
Claims priority of provisional application 62/201,391, filed on Aug. 5, 2015.
Prior Publication US 2019/0120015 A1, Apr. 25, 2019
Int. Cl. E21B 34/14 (2006.01); E21B 34/10 (2006.01)
CPC E21B 34/10 (2013.01) 14 Claims
OG exemplary drawing
 
1. A downhole valve comprising:
a tubular housing;
a tubular mandrel disposed radially inward of the tubular housing and partially defining an annular volume therebetween;
a tubular sleeve movably disposed within the annular volume and having a first end and a second end;
a sealed chamber within the annular volume and adjacent to the first end of the tubular sleeve; and
a passageway adjacent to the second end of the tubular sleeve and selectively fluidly coupling the annular volume with a central bore,
wherein the tubular sleeve is movable between a closed position and a test position when a pressure in the central bore is less than a pre-determined pressure of the sealed chamber, and the tubular sleeve is movable to an open, locked position upon a pressure in the central bore reaching a pre-determined pressure that exceeds a pressure of the sealed chamber, and
wherein the closed position restricts communication between the central bore and an exterior of the valve, the test position selectively permits communication between the central bore and the exterior of the valve, and the open, locked position permanently permits communication between the central bore and the exterior of the valve.