E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/2
E21B 47/09 (2006.01) E21B 7/06 (2006.01) E21B 41/00 (2006.01) E21B 47/024 (2006.01)
Patent
CA 1178530
ABSTRACT Deflection wedges are positioned in a generally horizontal drill hole in a predetermined orientation by means of a device which fits on the end of a drill string and is positioned in the hole. The deflection wedges positioned at the end of the device, and the device includes a unit which triggers at the predetermined angular orientation, to indicate that the wedge is correctly oriented. The orientation unit has a through passage for pressure fluid and a transverse passage intersecting the through passage. A blocking member is movable in the transverse passage and at a particular orientation moves along the transverse passage across the through passage. When crossing the through passage, the blocking member is entrained by the pressure fluid flow and moves to a position where it blocks the through passage, thus providing a signal to an operator that the unit is correctly positioned. The wedge is then secured in that position and the device withdrawn from the hole.
398487
Boart International Limited
Gowling Lafleur Henderson Llp
LandOfFree
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