Drilling device having a controlled path
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 4, 1989
Grant Date -
N/A
app pub date -
Mar 25, 1988
filing date -
Mar 27, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The drilling device comprises at least two stabilizers (7a, 7b, 7c) spaced apart in the longitudinal direction of the set of rods. The pistons (17a, 17b, 17c) of these stabilizers are interconnected and include common members (35, 37) for creating a pressure drop in the drilling fluid. Actuating surfaces (19a, 19b, 19c) including ramps (40) and complementary parts interconnecting the ramps cooperate with finger members (20) for effecting the extension of the bearing plates (21). The ramps (40) and the complementary parts of the actuating surfaces of the stabilizers (7a, 7b, 7c) are aligned in the longitudinal direction and are such that for each stable successive position of the pistons (17a, 17b, 17c), the bearing plates (21) are in positions of extension constituting a combination different from the preceding one.
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