Boring or penetrating the earth – Processes – Sampling of earth formations
Patent
1993-08-31
1994-10-04
Britts, Ramon S.
Boring or penetrating the earth
Processes
Sampling of earth formations
175246, 1753253, E21B 2500
Patent
active
053517652
ABSTRACT:
Coring apparatus and method are disclosed which provide for hydraulic latching of an inner core barrel within an outer core barrel. The apparatus includes a valve face disposed around the inner core barrel and valve seat disposed around the bore of the outer core barrel that close to form a restriction in the drilling fluid flow path. A hydraulic differential force is thereby created which holds the inner barrel in place. Axially oriented bores in a hanger assembly and in stabilizers are disposed along the inner core barrel to provide a flow path for the drilling fluid after the restriction is formed. The bores are calibrated to produce a pre-determined hydraulic force on the inner barrel. A bearing assembly is used to prevent transmission of outer barrel rotation to the inner core barrel. The outer surface of the bearing assembly forms the valve face so as to form the drilling fluid restriction and also provides an axial stop that prevents further axial movement of the inner barrel towards the core head.
REFERENCES:
patent: 2256092 (1940-09-01), Koebel et al.
patent: 2540464 (1951-02-01), Stokes
patent: 2543861 (1951-03-01), Mader
patent: 2634956 (1953-04-01), Stokes
patent: 2708103 (1955-05-01), Williams, Jr.
patent: 2708105 (1955-05-01), Williams, Jr.
patent: 2769615 (1956-11-01), Burgess
patent: 3741323 (1973-06-01), Constantinescu et al.
patent: 3777826 (1973-12-01), Wolda
patent: 3986555 (1976-10-01), Robertson
patent: 4512416 (1985-04-01), Rowley et al.
patent: 4518050 (1985-05-01), Sollie et al.
patent: 4518051 (1985-05-01), Sollie et al.
patent: 4573539 (1986-03-01), Carroll et al.
patent: 4735269 (1988-04-01), Park et al.
Composite Catalog of Oil Field Equipment & Services, 1980-1981, vol. I published by World Oil, p. 125.
Composite Catalog of Oil Field Equipment & Services, 1980-1981, vol. I published by World Oil, p. 1812.
Baroid Technology Inc.
Britts Ramon S.
Tsay Frank S.
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