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US 8,061,381 B2Granted
Sucker rod pump with improved ball and seat
OwnerMichael Fordinventor
Life of this patent
Estimating the term…
Abstract
There is provided a seat assembly for use in a downhole oil pump ball valve. The assembly includes a seat, a seat rest, and a ball. The seat is used for seating the ball of the ball valve. The seat has an outer wall and a top surface and a curved shoulder surface between the outer wall and the top surface. The seat rest receives the seat, and the seat rest has a curved corner surface so that when the seat is assembled with the seat rest the seat and seat rest are in substantial contact at all points of the curved shoulder surface and the curved corner surface.
Claims10
A seat assembly for use in a ball valve comprising:
- a seat for seating the ball of the ball valve, the seat having:
- a flat outer wall;
- a flat top surface;
- a top curved shoulder surface positioned between the outer wall and the top surface, the top curved shoulder surface beginning at the top surface and continuing to the outer wall, the top curved shoulder surface comprising a circular radius;
- a flat bottom surface that is the mirror image of the top surface;
- and
- a bottom curved shoulder surface positioned between the outer wall and the bottom surface that is the mirror image of the top curved shoulder surface;
- and
- a seat rest configured to receive the seat in either a top surface up or a bottom surface up orientation, the seat rest having a matching surface corresponding to one of the top surface and bottom surface of the seat and having a curved corner surface so that when the seat is assembled with the seat rest the seat and seat rest are in substantial contact at all points from one of the top curved shoulder surface to the top surface and the bottom curved shoulder surface to the bottom surface, on the one hand, and from the curved corner surface to the matching surface, on the other.
6 more elements
A ball valve comprising:
- a ball;
- a seat with an inner shoulder for receiving the ball, a flat outer wall, a flat top surface, and a top curved shoulder surface positioned between the outer wall and the top surface, the top curved shoulder surface beginning at the top surface and continuing to the outer wall, the top curved shoulder surface comprising a circular radius;
- a flat bottom surface that is the mirror image of the top surface, and a bottom curved shoulder surface positioned between the outer wall and the bottom surface that is the mirror image of the top curved shoulder surface;
- and
- a seat rest positioned upward of the seat and configured to hold the seat, wherein the seat rest has a matching surface corresponding to one of the top surface and bottom surface of the seat and a curved corner having a curved corner surface so that when the seat is assembled with the seat rest, with the seat in either a top surface up or a bottom surface up orientation, the seat and seat rest are in substantial contact at all points from one of the top curved shoulder surface to the top surface and the bottom curved shoulder surface to the bottom surface, on the one hand, and from the curved corner surface to the matching surface, on the other.
2 more elements
Dependencies are inferred from the claim text.