Patent ID: 8528646
Filing Date: 2013-09-10
Classification: E21B

Abstract:
1. A pipe blocker for blocking a broken subsea pipe comprising: a tubular body defining a central cavity having an inlet, an outlet, and an axis; a plurality of conical blocker rings mounted to an inner diameter surface of the tubular body within the cavity, at least some of the blocker rings being rigid and some of the blocker rings being compliant; the blocker rings adapted to seal to a pipe end inserted into the central cavity; the rigid blocker rings having an outer diameter joined to an inner diameter of the central cavity; the compliant blocker rings having an inner diameter smaller than an inner diameter of the rigid blocker rings and adapted to seal around an exterior of the pipe when inserted from the inlet; and wherein a conical surface of each compliant blocker ring seals against a conical surface of at least one rigid blocker ring.