Selectively-controlled well bore apparatus

Details Selectively-controlled well bore apparatus Selectively-controlled well bore apparatus

1978-05-24

1981-01-06

Novosad, Stephen J.

Wells

With electrical means

166237, 166241, 166250, 33178F, E21B 47022, E21B 4708

Patent

active

042430992

ABSTRACT:
In the preferred embodiment of the well bore apparatus of the present invention disclosed herein, a new and improved well tool is provided with a plurality of tool-positioning members that are pivotally coupled to the body of the tool and adapted for movement between their respective retracted and extended positions. To control the movements of the tool-positioning members, a selectively-reversible electric motor is cooperatively coupled to the pivotal members in such a manner that upon operation of the motor in one rotational direction, the members are released so as to be free to respectively move toward their extended positions in response to a biasing force selected to extend the members at a predetermined rapid speed of travel. Upon reversal of the motor, the members are recoupled and returned to their retracted positions.

REFERENCES:
patent: 2291371 (1942-07-01), Buchanan et al.
patent: 2310572 (1943-02-01), Burns
patent: 2701615 (1955-02-01), Riordan, Jr. et al.
patent: 2705167 (1955-03-01), Layne et al.
patent: 2944603 (1960-07-01), Baker et al.
patent: 3167707 (1965-01-01), Oliver
patent: 3338317 (1967-08-01), Shore
patent: 4094359 (1978-06-01), King

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