Turbine driven hammer that oscillates at a constant frequency
First Claim
1. A drilling assembly, comprising:
- a drill bit having an axis of rotation, said drill bit including;
a shank;
a working face spaced apart from said shank;
a bore extending between said shank and said working face, said bore configured to receive a drilling fluid; and
,a jack element substantially coaxial with said axis of rotation, said jack element including a distal end extending beyond said working face;
a turbine disposed within said bore and configured to rotate under an influence of said drilling fluid;
a porting mechanism disposed within said bore, said porting mechanism including;
a piston chamber having a proximal end and a distal end, said piston chamber including a piston in communication with said jack element;
a first disc coupled to and configured to rotate with said turbine, said first disc including at least one first port; and
,a second disc, said second disc including at least one second port and at least one third port, said first disc substantially contacting said second disc along a flat interface substantially normal to said axis of rotation, said first port aligning and misaligning with said second port and said third port as said first disc rotates relative to said second disc, thereby allowing said drilling fluid to pass into and out of said piston chamber to extend said jack element beyond said working face and to retract said jack element at a constant frequency.
1 Assignment
0 Petitions
Accused Products
Abstract
A hammer assembly comprises a jack element substantially coaxial with an axis of rotation of a drill bit. The jack element includes a distal end extending beyond a working face of the drill bit. A porting mechanism within the bore comprises a first and second disc substantially contacting along a flat interface that is substantially normal to the axis of rotation. The first disc is attached to a turbine which is adapted to rotate the first disc with respect to the second disc. The first disc comprises a first set of ports adapted to align and misalign with a second and third set of ports in the second disc. As the first disc rotates, the sets of ports are adapted to route a drilling fluid into a piston chamber where a porting mechanism causes the jack element to repeatedly extend further beyond the working surface of the drill bit and then retract at a constant frequency.
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Citations
20 Claims
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1. A drilling assembly, comprising:
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a drill bit having an axis of rotation, said drill bit including; a shank; a working face spaced apart from said shank; a bore extending between said shank and said working face, said bore configured to receive a drilling fluid; and
,a jack element substantially coaxial with said axis of rotation, said jack element including a distal end extending beyond said working face; a turbine disposed within said bore and configured to rotate under an influence of said drilling fluid; a porting mechanism disposed within said bore, said porting mechanism including; a piston chamber having a proximal end and a distal end, said piston chamber including a piston in communication with said jack element; a first disc coupled to and configured to rotate with said turbine, said first disc including at least one first port; and
,a second disc, said second disc including at least one second port and at least one third port, said first disc substantially contacting said second disc along a flat interface substantially normal to said axis of rotation, said first port aligning and misaligning with said second port and said third port as said first disc rotates relative to said second disc, thereby allowing said drilling fluid to pass into and out of said piston chamber to extend said jack element beyond said working face and to retract said jack element at a constant frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A drilling assembly, comprising:
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a drill bit, said drill bit including; a shank; a working face spaced apart from said shank; a bore extending between said shank and said working face, said bore configured to receive a drilling fluid; and
,a jack element, said jack element including a distal end extending beyond said working face; a turbine disposed within said bore and configured to rotate under an influence of said drilling fluid; a porting mechanism disposed within said bore, said porting mechanism including; a piston chamber, said piston chamber including a piston in contact with said jack element; a first disc coupled to and configured to rotate with said turbine, said first disc including at least one first port and at least one exhaust port; and
,a second disc, said second disc including at least one second port and at least one third port, said first port and said exhaust port alternately aligning and misaligning with said second port and said third port as said first disc rotates relative to said second disc, thereby allowing said drilling fluid to pass into and out of said piston chamber to extend said jack element beyond said working face and to retract said jack element.
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20. A drilling assembly, comprising:
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a shank; a working face spaced apart from said shank; a bore extending between said shank and said working face, said bore configured to receive a drilling fluid; and
,a jack element substantially coaxial with said axis of rotation, said jack element including a distal end extending beyond said working face; a turbine disposed within said bore and configured to rotate under an influence of said drilling fluid; a porting mechanism disposed within said bore, said porting mechanism including; a piston chamber, said piston chamber including a piston in contact with said jack element; a first disc coupled to and configured to rotate with said turbine, said first disc including a set of first ports; and
,a second disc, said second disc including a set of second ports and a set of third ports, said set of first ports aligning and misaligning with said set of second ports and said set of third ports as said first disc rotates relative to said second disc, thereby allowing said drilling fluid to pass into and out of said piston chamber to cyclically extend said jack element beyond said working face and to retract said jack element.
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Specification