Boring or penetrating the earth – Means traveling with tool to constrain tool to bore along... – Axially spaced opposed bore wall engaging guides
Patent
1980-02-22
1981-08-04
Pate, III, William F.
Boring or penetrating the earth
Means traveling with tool to constrain tool to bore along...
Axially spaced opposed bore wall engaging guides
175 61, 175 62, 175 94, E21B 708
Patent
active
042817234
ABSTRACT:
An improved deflecting device is provided for a drilling apparatus having a rotatable drill shaft extending from a power source through said deflection device to a drill bit. The deflection device includes an outer housing affixed to the power source and extending axially therefrom. An inner ring is disposed within the housing and encompasses a portion of the drill shaft. An intermediate ring is disposed between the outer housing and the inner ring and has an inner configuration such that the inner ring is immovable relative to the intermediate ring in a first direction, and is prevented from rotating relative to said intermediate ring about an axis parallel to a second direction perpendicular to said first direction, and such that said inner ring is movable relative to the intermediate ring in said second direction. The intermediate ring is movable in the first direction relative to the outer housing, and is prevented from rotating relative to said outer housing about an axis parallel to said first direction. First and third opposed hydraulic rams are provided for positioning the intermediate ring relative to the outer housing in the first direction. Second and fourth opposed hydraulic rams are provided to position the inner ring relative to the intermediate ring in the second direction. A sequencing valve selectively directs hydraulic fluid under pressure to any one of said first, second, third and fourth hydraulic rams or to any transverse pair of said hydraulic rams.
REFERENCES:
patent: 3043381 (1962-07-01), McNeely, Jr.
patent: 3437380 (1969-04-01), Lawrence
patent: 4040494 (1977-08-01), Kellner
Bourne, Jr. Henry A.
Edmond Tibor O.
Collins Richard W.
Conoco Inc.
Pate III William F.
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