Turbine Driven Hammer that Oscillates at a Constant Frequency
First Claim
1. A hammer assembly, comprising;
- a jack element substantially coaxial with an axis of rotation of a drill bit, the jack element comprises a distal end extending beyond a working face of the drill bit;
a porting mechanism within the bore comprising a first and second disc substantially contacting along a flat interface substantially normal to the axis of rotation;
the first disc 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 of the second disc as the first disc rotates, the sets of ports are adapted to route a drilling fluid into a piston chamber;
wherein the porting mechanism causes the jack element to repeatedly extend further beyond the working surface of the drill bit at a constant frequency.
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Accused Products
Abstract
In one aspect of the present invention a hammer assembly comprises a substantially coaxial jack element with a distal end extending beyond a working face of a drill bit. A porting mechanism within the bore comprises a first and second disc substantially contacting along a flat interface 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 the porting mechanism causes the jack element to repeatedly extend further beyond the working surface of the drill bit at a constant frequency.
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Citations
19 Claims
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1. A hammer assembly, comprising;
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a jack element substantially coaxial with an axis of rotation of a drill bit, the jack element comprises a distal end extending beyond a working face of the drill bit; a porting mechanism within the bore comprising a first and second disc substantially contacting along a flat interface substantially normal to the axis of rotation; the first disc 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 of the second disc as the first disc rotates, the sets of ports are adapted to route a drilling fluid into a piston chamber; wherein the porting mechanism causes the jack element to repeatedly extend further beyond the working surface of the drill bit at a constant frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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- 15. The hammer assembly of claim 15, wherein the lubrication system comprises a shaft that extends from the second disc to a lubricant reservoir adjacent to the turbine.
- 17. The hammer assembly of claim 17, wherein the bypass channel comprises a set of tortuous paths which limit the amount of drilling fluid allowed to pass.
Specification