Boring or penetrating the earth – Means traveling with tool to constrain tool to bore along...
Patent
1984-05-23
1987-01-27
Leppink, James A.
Boring or penetrating the earth
Means traveling with tool to constrain tool to bore along...
175 76, 175325, E21B 704, E21B 708
Patent
active
046388737
ABSTRACT:
A direction and angle maintenance tool and a method for using same are provided for drilling directionally oriented boreholes. The tool generally comprises a mandrel and a sleeve, which is rotatably attachable around the mandrel. The mandrel has a longitudinal bore and is attachable at its upper end to a rotary drill string and at its lower end to a rotary drill bit sub which is attached to a rotary drill bit. The sleeve has an eccentric longitudinal bore, forming a heavy, or weighted, side of the sleeve. A gauge insert is provided which is longitudinally attachable to the weighted side of the sleeve. By varying the size of the insert, the angle of deviation of a directionally drilled borehole may be maintained or adjusted. A self-adjusting blade may be added in order to aid in maintaining a desired angle of deviation or to induce a desired change of direction.
REFERENCES:
patent: 3062303 (1962-11-01), Schultz
patent: 3092188 (1963-06-01), Farris et al.
patent: 3650338 (1972-03-01), McNeely, Jr.
patent: 3825081 (1974-06-01), McMahon
patent: 4220213 (1980-09-01), Hamilton
patent: 4305474 (1981-12-01), Farris et al.
Kiesel William David
Leppink James A.
Overton J. Bradley
Smith Matthew
Tucker Robert C.
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