Boring or penetrating the earth – Natural vibration characteristic of an element of boring...
Reexamination Certificate
2006-03-28
2006-03-28
Bagnell, David (Department: 3672)
Boring or penetrating the earth
Natural vibration characteristic of an element of boring...
C175S067000, C175S297000
Reexamination Certificate
active
07017681
ABSTRACT:
The proposed invention relates to wellbore technologies and is intended to produce action on productive rock. Device for hydrodynamic action on wall of a well comprising a casing jointed with the pipe conduit directly or via a roller support and inside of which the mechanism for cavitating of flow of a liquid, mechanism for directing and splitting of the flow and mechanism for interrupting of the discharge jets are sequentially placed. The mechanism for cavitating of flow of a liquid is made in form of an auto-oscillating system. And specifically it can be made in a form of a ball with its diameter ratio to inner diameter of the casing of 0.9–0.98 and a limiter of axial motion; or a ball with its diameter ratio to inner diameter of the casing less than 0.9 and a limiter of axial motion in form of a coil spring lower end of which is rigidly connected to the casing and the upper end of which has a seat for the ball; or a cone the nose of which is directed counter flow, which cone is placed into a diffuser providing a clearance to let the liquid flowing and a freedom for the cone to move axially; or a butterfly valve freely rotating around transversely shaft and the halves of which are oppositely convex in respect of the rotation axis of said valve. The mechanism for interrupting of the discharge jets is made in form of the cylindrical roller bodies placed in the casing equidistantly or non-equidistantly by a separator wheel and resting on a ball working as both a roller support and a float valve. And the number of said cylindrical bodies is either (n+1) or (n−1) where (n) is a number of outlet orifices.
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Ivannikov Ivan Vladimirovich
Ivannikov Vladimir Ivanovich
Bagnell David
Collard & Roe P.C.
Smith Matthew J.
Whirlwind International B.V.
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