Patent ID: 7975761

Claim:
A blowout preventer comprising: a body including a cavity having first and second recesses; a ram block configured to move inside the cavity; a top seat provided in the first recess and configured to seal the well when the ram block is closed; a wear plate provided in the second recess and configured to contact the ram block when the ram block moves inside the cavity over the wear plate; and a biasing element provided inside the cavity and configured to apply a biasing force on at least one of the top seat, the ram block or the wear plate to increase the sealing of the well; and at least one pad movably attached to the ram block and configured to support a weight of the ram block on a lower surface of the cavity, wherein the biasing element includes a first part that is provided between the ram block and the at least one pad and configured to apply the biasing force on the at least one pad such that the at least one pad is pressed towards a lower surface of the cavity and the ram block is pressed towards an upper surface of the cavity.