Pressure balanced seal

Details Pressure balanced seal Pressure balanced seal

1984-03-23

1985-12-10

Smith, Robert I.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 75, 277 961, 285275, F16J 1534

Patent

active

045574898

ABSTRACT:
A pressure balanced mechanical seal, especially adaptable for use in a swivel in an oil well drilling arrangement comprising a pair of relatively rotatable seal rings constructed of silicon carbide or tungsten carbide each received in a cavity defined by a cylindrical and a radial wall in the respective housing for the ring with the inner cylindrical surface of each exposed to high pressure, high temperature drilling mud and with means to communicate drilling mud to the outer cylindrical surfaces thereof, and means for balancing the axial forces on the rings and to insure sufficient axial forces for perfecting the seal. Tensional and compressive forces on the rings are minimized insuring reasonable life to the seal, far in excess of that in the conventional packings now used in the oil drilling system.

REFERENCES:
patent: 3460857 (1969-08-01), Larkin
patent: 3804424 (1974-04-01), Gardner
patent: 3975991 (1976-08-01), Nakajima
patent: 4071253 (1978-01-01), Heinen et al.
patent: 4299398 (1981-11-01), Wahl

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