E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/51.3
E21B 17/10 (2006.01) E21B 33/035 (2006.01) E21B 33/08 (2006.01)
Patent
CA 1154379
44-111/RE1.5 KELLY PACKING AND STRIPPER SEAL PROTECTION ELEMENT ABSTRACT OF THE DISCLOSURE A stripper seal protection and operating tool sealing element and method for protecting stripper seals during drilling operations with operating tools having both polygonal and circular cross sections. The stripper seal protection and operating tool sealing element includes a lower protective sleeve for expanding the stripper seal radially outward to prevent contact with polygonal operating tools and includes a head portion integral therewith for mounting an elastic sealing ring for packing off on the polygonal operating tool. The protective sealing element is particularly useful for applications in diverter housings of the rotating insert type. The protective and sealing element is inserted and removed from the diverter coupling concurrently with polygonal operating tools such as kellies. The protective sealing element also includes rotating lock means to provide common rotation of the rotating insert with the kelly. Further, means are provided for biasing the sealing ring laterally outward to insure adequate sealing between the kelly and element head portion.
370828
Gowling Lafleur Henderson Llp
Hughes Tool Company
LandOfFree
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