Patent ID: 9518452
Filing Date: 2016-12-13
CPC Classification: E21B

Claim Text:
1. A setting tool for hanging a tubular string from a liner string, casing string, or wellhead, comprising: a tubular mandrel having an actuation port formed through a wall thereof; a debris barrier for engaging an upper end of the tubular string; a piston disposed along the mandrel, having an upper face in fluid communication with the actuation port, and operable to stroke the debris barrier relative to the mandrel, thereby setting a hanger of the tubular string; an actuator sleeve extending along the mandrel and connected to the piston; a latch releasably connecting the debris barrier to the actuator sleeve and for releasably connecting the debris barrier to the tubular string; a packoff connected to the mandrel below the piston and operable to seal against an inner surface of the tubular string, thereby forming a buffer chamber between the debris barrier and the packoff; and a passage in fluid communication with a lower face of the piston, formed in a wall of and along the mandrel, and bypassing the packoff.