Swivel

Details Swivel Swivel

E - Fixed Constructions

21

B

E21B 7/04 (2006.01) F16C 19/54 (2006.01)

Patent

CA 2399735

A swivel for placing utility product with horizontal directional drilling techniques comprising a head piece and a tail piece rotationally mounted on the head piece. A bearing assembly of oppositely disposed units with high thrust capacity and self-alignment properties is mounted on a stub shaft integral with the head piece and enclosed by a shell body associated with the tail piece. A gap between the head piece and shell body is sealed with a metal face seal assembly. A juncture between the shaft and main part of the head piece is shaped to avoid a stress riser condition and a thrust washer has a configuration complimentary to the juncture to transmit forces between the head piece and bearing assembly. A joint between the tail piece and shell body is locked with a weld bead technique that enables the unit to be refurbished with reduced labor.

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