Patent ID: 6702024
Filing Date: 2004-03-09
Classification: E21B

Abstract:
A seal assembly positioned in a transverse bore of a seal carrier in a valve, the seal carrier shifting from a closed position to an open position, and the valve having a pair of opposing seal plates, the seal assembly being aligned with the seal plates when the seal carrier is in the closed position, and the seal assembly being out of alignment with the seal plates when the seal carrier is in the open position, the seal assembly being exposed alternatively to supply pressure and to function pressure, the seal assembly comprising:a seal spool having a central circular collar and a transverse axle, a first end of the axle extending from one side of the collar and a second end of the axle extending from the opposite side of the collar; a first seal cup having a through bore, a portion of the bore being sized and arranged to receive the first end of the axle, the seal cup having a sealing surface to seal against the opposing seal plate; a second seal cup having a through bore, a portion of he bore being sized and arranged to receive the second end of the axle, the second seal cup having a sealing surface to seal against the opposing seal plate; a first O-ring positioned around the first end of the axle; a second O-ring positioned around the second end of the axle; and the first O-ring compressed by the first seal cup against the collar and the second O-ring compressed by the second seal cup against the collar so the O-rings act as seals and as springs urging the seal cups into contact with the opposing seal plates.