Patent ID: 9109432
Filing Date: 2015-08-18
Classification: E21B

Abstract:
1. A hydraulic screen table, comprising: a. a base for resting on a surface; b. a support portion raised above the surface; c. an opening in the support portion for allowing a section of pipe to travel into and out of a well bore below the surface; d. upper support plates moveable between a closed position, engaging a wall of the section of pipe, to an open position, allowing the pipe to be lowered into the well bore; e. emergency actuation plates manually pinned to the upper support plates when the upper support plates are in the closed position around the section of pipe, and wherein said emergency actuation plates are stationary during normal operations and moveable to an open position during an emergency; f. a first set of powered cylinders, each first powered cylinder comprising a movable locking pin, wherein when in an extended position each locking pin extends into one of the emergency actuation plates for holding the emergency actuation plates in place during normal operations, and wherein during an emergency, powering on the cylinders causes the locking pins to retract so that the emergency actuation plates are movable to an open position; g. a second set of powered cylinders, each of the second set of powered cylinders secured to the emergency actuation plates, the second set of powered cylinders for moving the emergency actuation plates to an open position during an emergency, and pulling the upper support plates from the closed position around the sand screen to an open position away from the sand screen, allowing the sand screen to fall into the well bore.