Patent ID: 8256505
Filing Date: 2012-09-04
Classification: E21B

Abstract:
1. A sealed well cellar comprising a) an integral structural base plate, said base plate having an opening therein for receiving a conductor and being load-bearing; b) a vertically extending side wall formed integrally with said base plate to ensure sealing between said vertically extending side wall and said base plate; c) a riser positioned in said opening in said base plate; d) first sealing means between said base plate and said riser preventing fluid flow between said base plate and said riser; e) second sealing means between said riser and the conductor preventing fluid flow between said riser and the conductor; f) an anti-buoyancy port formed in a bottom portion of said wall, a removable plug for said anti-buoyancy port, means to secure said removable plug in said anti-buoyancy port; whereby said first and second seal means have sufficient structural integrity to transfer a weight of the conductor and associated drilling equipment to said integral structural base plate.