| 摘要 |
An apparatus having a tubular housing adapted for securing to a wellhead of an oil well for sealing a reciprocating oil well pump polished rod extending through the tubular housing. The housing is formed in two operating tubular portions that are connected to enable limited angular movement therebetween, but which are resiliently urged to maintain longitudinal alignment of the two portions. A plurality of longitudinally spaced packing rings carried in one of the housing portions effects the wellhead leakage blocking seal with the reciprocating polished rod. Upper and lower rod scrapers protect the spaced seals from contact with undesired foreign matter that may be carried by the polished rod or that will damage the seals. A pair of guide bushings located adjacent the seals maintains longitudinal alignment of the seal carrying housing portion with the polished rod.
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