Patent ID: 7931078

Claim:
A stuffing box apparatus for effecting a seal with a polish rod having a substantially constant diameter extending from a hydrocarbon production well, the apparatus comprising: a tubular housing having a bore extending in an axial direction through the housing between a top end and a bottom end of the housing so as to be arranged to receive the polish rod therethrough, the bottom end being arranged for connection to the well; a plurality of sealing members supported in the bore of the tubular housing and arranged for sealing engagement between the tubular housing and the polish rod arranged to be received through the housing; a lower bushing supported within the bore so as to be arranged for engagement between the tubular housing and the polish rod at a location below the plurality of sealing members; the lower bushing comprising a body, a main bore extending through the body and having a diameter arranged to closely receive the substantially constant diameter of the polish rod therethrough and a counter bore formed at one end of the body and having a diameter which is greater than a diameter of the main bore; a wiper member mounted in the counter bore of the lower bushing; the wiper member being arranged for sealing engagement between the lower bushing and the polish rod; and the wiper member comprising a solid and continuous sealing member about a circumference of the polish rod.