Patent ID: 8979062
Filing Date: 2015-03-17
Classification: E21B,Y10T

Abstract:
1. A ram blowout preventer (BOP) for sealing a well having a wellbore, the ram blowout preventer comprising: a body having a first chamber extending along a first direction and a second chamber extending along a second direction, substantially perpendicular to the first direction; a ram block configured to move inside the first chamber, the ram block having a packer region and at least one channel that extends all the way through the ram block; a packer configured to be provided in the packer region to seal a tool provided inside the second chamber; at least one double piston provided through the at least one channel, the piston having first and second piston sides connected by a rigid central part, the first piston side for contacting the packer, and the second piston side for contacting fluid in the wellbore; and a metal plate provided on a frontal side of the ram block over the at least one channel, the metal plate having an opening for allowing a part of the double piston to move through the metal plate.