Rotary drilling device with pivoting drill head assembly

Details Rotary drilling device with pivoting drill head assembly Rotary drilling device with pivoting drill head assembly

1979-05-15

1981-04-21

Reynolds, Wm. Carter

Tool driving or impacting

Drive by means reacting to rotating eccentric mass

24263DA, 292201, E21B 1900

Patent

active

042627540

ABSTRACT:
In a rotary drilling device for powering a drill string into subterranean strata and having a vertically alignable drill mast, a drill head assembly for applying rotational movement to the drill string, elevational means on which the head assembly is mounted on said mast for vertical movement thereon, and with the head assembly including a support housing for a rotary drive unit pivotally movable from an operating position in alignment with the drill string to a pivoted position out of such alignment. The drill head assembly further includes a latch assembly for normally maintaining the support housing in its operating position when in a closed condition and to release the support housing when in an open condition, an extensible and retractible member for actuating the latch means from a closed condition to an open condition, for moving the support housing into its pivoted position and for returning the support housing to the operating position, and spring members for retaining the latch assembly in an open condition during return movement of the support housing to the operating position.

REFERENCES:
patent: 2792198 (1957-05-01), Braun
patent: 2919899 (1960-01-01), Hitchcock
patent: 3199153 (1965-08-01), Weinstein
patent: 3302735 (1967-02-01), Klem et al.
patent: 3805693 (1974-04-01), Neitzel et al.
patent: 3835940 (1974-09-01), Winter, Jr.
patent: 3915491 (1975-10-01), Montgomery

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