Boring or penetrating the earth – Automatic control
Patent
1993-07-27
1994-08-30
Dang, Hoang C.
Boring or penetrating the earth
Automatic control
175 27, 175 45, 175 73, E21B 704, E21B 4400
Patent
active
053418867
ABSTRACT:
An improved method and apparatus for controlling the direction of advance of a rotary drill to produce a borehole profile substantially as preplanned with minimal curvature while maintaining optimum drilling performance. The preferred embodiment of the system comprises a drill string, a rotatable drill bit carried on said drill string, and a compliant subassembly in said drill string, said compliant subassembly facilitating changes in the direction of drilling of said borehole. The system further comprises a plurality of sensors for measuring strains within the compliant subassembly and for producing data signals corresponding to the strain measurements. A control system is operable to use the data signals to change the direction of the borehole by applying a shear force to the drill bit.
REFERENCES:
patent: 4303994 (1981-12-01), Tanguy
patent: 4324297 (1982-04-01), Denison
patent: 4445578 (1984-05-01), Millheim
patent: 4479564 (1984-10-01), Tanguy
patent: 4662458 (1987-05-01), Ho
patent: 4733733 (1988-03-01), Bradley et al.
patent: 4739841 (1988-04-01), Das
patent: 4747303 (1988-05-01), Fontenot
patent: 4760735 (1988-08-01), Sheppard et al.
patent: 4805449 (1989-02-01), Das
patent: 4821563 (1989-04-01), Maron
Cook, R. L. et al, "First Real Time Measurements of Down Hle Vibrations, Forces, and Pressures Used to Monitor Directional Drilling Operations," SPE/IADC 18651 Mar. 1989.
Delafon, H. "BHA Prediction Software Improves Directional Drilling," World Oil, Mar. 1989, pp. 45-50.
Delafon, H., "BHA Prediction Software Improves Directional Drilling," World Oil, Apr. 1989, pp. 50-60.
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