Riserless mud return system

Details Riserless mud return system Riserless mud return system

1977-09-06

1979-04-17

Novosad, Stephen J.

Boring or penetrating the earth

Boring a submerged formation

Boring from floating support with submerged independent...

166368, 175 25, 175 38, 175217, E21B 1502

Patent

active

041496035

ABSTRACT:
A system and method are disclosed which eliminates the use of a riser pipe in underwater drilling operations. The system includes a mud sump connectable to the top of a submerged wellhead and has a bottom with a mud inlet provided therein and an upwardly extending wall cooperating with the bottom to support a quantity of mud, the sump restricting the water to contact with only the upper surface of the mud as the mud passes upwardly through the mud inlet in the bottom. A hose, separate from the drill string, is used to carry mud to the surface of the water. A pumping means is used to pump mud through the hose in response to the quantity of mud supported within the sump to thereby return the mud to the surface of the water without the use of a riser pipe.

REFERENCES:
patent: 1811761 (1931-06-01), Roberts
patent: 2534480 (1950-12-01), Shannon
patent: 2937006 (1960-05-01), Thayer
patent: 3252529 (1966-05-01), Fischer
patent: 3260004 (1966-07-01), Brooks
patent: 3498674 (1970-08-01), Matthews
patent: 3603409 (1971-09-01), Watkins
patent: 3612176 (1971-10-01), Bauer et al.
patent: 3902553 (1975-09-01), Jergins
patent: 3971593 (1976-07-01), Porte et al.
patent: 4030216 (1977-06-01), Willums
patent: 4060140 (1977-11-01), Barrington

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