Patent ID: 7108058

Claim:
In combination with a rotary drilling swivel having a cylindrical wash pipe, a packing assembly comprising: a housing assembly forming an annular closed, sealing assembly chamber in surrounding relationship to said wash pipe, said housing assembly including a gland portion having an injection port in open communication with said chamber; a sealing assembly disposed in said chamber, said sealing assembly including: a first, annular seal ring having an elastomeric, first annular radially inwardly projecting sealing lip, said sealing lip surrounding and being in sealing engagement with said wash pipe; an annular containment member disposed in said chamber in surrounding relationship to said wash pipe and axially spaced from said first seal ring; and an injectable packing composition in sealing engagement with said wash pipe and disposed between said first seal ring and said containment member; one of said wash pipe and said packing assembly being rotatable relative to the other.