Stuffing box

Details Stuffing box Stuffing box

E - Fixed Constructions

21

B

277/27, 166/47

E21B 33/03 (2006.01) E21B 33/08 (2006.01) F16J 15/18 (2006.01)

Patent

CA 2028555

An improvement in a stuffing box for a rotary polished rod having a tubular housing with rod guides disposed at each end. The improvement consists of a second rod guide disposed in a passage at a second end of the tubular housing. The second rod guide is in the form of an annular bushing having a first end, a second end, an external surface and an internal surface defining a bore extending between the first end and the second end. Annular interior sealing elements are disposed at each of the ends of the bushing thereby effecting a sealing engagement between the internal surface of the bushing and the external surface of the rod. An annular exterior sealing element is disposed on the external surface of the bushing thereby effecting a sealing engagement between the external surface of the bushing and the internal surface of the housing.

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