Pipe joints or couplings – Swivel – Pipe in socket type
Patent
1980-03-03
1981-11-10
Arola, Dave W.
Pipe joints or couplings
Swivel
Pipe in socket type
285 16, F16L 2700
Patent
active
042994160
ABSTRACT:
A swivel for a reverse rotary drilling machine is described which is adapted to be positioned between a rotatable Kelly bar and a circulating fluid hose which extends laterally from the upper end of the swivel. The swivel comprises a packing body which is secured to the upper end of the Kelly bar and which extends upwardly therefrom. A bearing body is operatively secured to the upper end of the packing body and extends upwardly therefrom. A bearing stem is operatively secured to the fluid hose and extends downwardly into the open upper end of the bearing body and has its lower end threadably secured to a packing stem positioned within the packing body. Bearings are positioned between the interior surface of the bearing body and the exterior surface of the bearing stem. Packing material is positioned between the interior surface of the packing body and the exterior surface of the packing stem. A packing ring extends around the exterior surface of the packing stem and is designed to compress the packing material so that fluid cannot pass upwardly between the packing stem and the packing body. A plurality of bolts are operatively secured to the packing ring to cause the compression of the packing material.
REFERENCES:
patent: 1280536 (1918-10-01), Petersen
patent: 2088418 (1937-07-01), King
patent: 3434742 (1969-03-01), Swinney
patent: 3492025 (1970-01-01), Holland
patent: 3497244 (1970-02-01), Grantom
patent: 3679235 (1972-07-01), Faccou
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