Abstract: A valve assembly for an inflatable packer includes an opening valve configured to actuate into an open position in response to a first pressure within a tubular string, so as to permit fluid flow from the tubular string, through the valve assembly, and into an inflatable packer element. The valve assembly also includes a closing valve configured to actuate into a closed position so as to prevent fluid flow from the tubular string, through the valve assembly, and into the inflatable packer element in response to a second pressure within the inflatable packer element. The valve assembly also includes a contingency valve configured to actuate into a closed position so as to prevent fluid flow from the tubular string, through the valve assembly, and into the inflatable packer element in response to a third pressure in the tubular string.

Abstract: A downhole tool includes an inner mandrel having an inner mandrel bore that extends axially-therethrough. The downhole tool also includes a first valve configured to move between a first position and a second position. The downhole tool also includes an inflatable element configured to inflate and expand radially-outward and into contact with a surrounding tubular in response to the first valve moving to the second position, which permits a fluid in the inner mandrel bore to flow into the inflatable element. The downhole tool also includes a second valve configured to vent some of the fluid within the inflatable element to an exterior of the downhole tool in response to the fluid reaching a second valve pressure threshold.

Abstract: A valve assembly for an inflatable packer includes an opening valve configured to actuate into an open position in response to a first pressure within a tubular string, so as to permit fluid flow from the tubular string, through the valve assembly, and into an inflatable packer element. The valve assembly also includes a closing valve configured to actuate into a closed position so as to prevent fluid flow from the tubular string, through the valve assembly, and into the inflatable packer element in response to a second pressure within the inflatable packer element. The valve assembly also includes a contingency valve configured to actuate into a closed position so as to prevent fluid flow from the tubular string, through the valve assembly, and into the inflatable packer element in response to a third pressure in the tubular string.