Boring or penetrating the earth – Automatic control – Of boring means including a below-ground drive prime mover
Patent
1992-08-12
1994-05-24
Bagnell, David J.
Boring or penetrating the earth
Automatic control
Of boring means including a below-ground drive prime mover
175 45, 175 61, 33304, 33308, E21B 708, E21B 47024
Patent
active
053140303
ABSTRACT:
The invention provides a system for precisely guiding the direction of a drill bit. The drill shaft has an orientation sensor that detects deviation of the drilling direction from the desired direction; the drill bit is steerable by preferentially directing flushing fluid at the drilling end; and a fluid modulation means controls the flushing in response to a signal from the orientation sensor. The invention also provides a tiltmeter for detecting deviation from vertical of the axis of rotation of a rotating shaft. A gravity-driven mechanical oscillator, for instance a pendulum, is carried by the rotating shaft, and has a natural oscillation frequency matched to the rotational frequency of the shaft; and a sensor determines the phase relationship of the oscillator relative to the angular position of the shaft, thereby producing a signal indicating the deviation of the shaft from vertical.
REFERENCES:
patent: 1313367 (1919-08-01), Auschutz-Kaempfe
patent: 2046956 (1936-07-01), Lynch et al.
patent: 2380520 (1945-07-01), Hassler
patent: 3359782 (1967-12-01), Van Bey
patent: 3791042 (1974-02-01), Bell
patent: 3897837 (1975-08-01), Peterson
patent: 4216590 (1980-08-01), Kelly
patent: 4637479 (1987-01-01), Leising
patent: 4930586 (1990-06-01), Turin et al.
Charles T. Davenport, "The Gyro Vertical," Gyroscopes: Theory and Design, Chapter 6, pp. 131-150, 1961.
Peterson and Maloney, "A System for Continuously Guided Rock Drilling", presented on Jan. 26-29, 1992 at Engineering For a Sustained Environment, Adam's Mark Hotel, Houston, Tex.
Slaughter, "Development, Laboratory, and Field Test Results of a New Hydraulic Design for Roller Cone Rock Bits," SPE 14220, Sep. 1985.
Maloney, Peter J., S. M. Thesis, Massachusetts Institute of Technology, deposited in the MIT Library on Dec. 13, 1992.
Maloney Peter J.
Peterson Carl R.
Bagnell David J.
Massachusetts Institute of Technology
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