Patent ID: 7926559

Claim:
A stuffing box for sealing with a rotating rod string powered by a drive shaft and extending into a well for powering a pump, comprising: a stuffing box housing having a lower open end and an upper open end; a sleeve rotatable within the stuffing box housing and having an elongate cavity for receiving a portion of the rod string, the sleeve including a top cap portion axially movable with respect to a lower sleeve portion; one or more bearings for guiding rotation of the sleeve with respect to the stuffing box housing; a plurality of static seals each sealing between the sleeve and the rod string; an axially compressive member activated by movement of the top cap with respect to the lower sleeve portion to compress each of the plurality of static seals for reliable sealing engagement with the rod string, the compressive member being a coil spring acting between the top cap portion and the lower sleeve portion; a plurality of dynamic fluid pressure energized seals each sealing between the sleeve and the stuffing box housing; an outer sleeve supported on the rod string for sealing engagement with the plurality of dynamic seals; and a connector for rotatably interconnecting the drive shaft and the sleeve.