Selectively-controlled well bore apparatus
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.
- Assignee:
- Schlumberger Technology Corp
- Patent Number(s):
- US 4243099
- OSTI ID:
- 6323858
- Country of Publication:
- United States
- Language:
- English
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420206 -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
BOREHOLES
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NATURAL GAS WELLS
OIL WELLS
POSITIONING
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