Hydrojets rotary drill bit with volumetric cooling
AssigneeCool Edge Bits
InventorsAnatoli Alimpievich Borissov, Vasili Borissov, Alexandre Borissov
Life of this patent
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Abstract
A method for drilling with a drill bit includes communicating a fluid from a bottom hole assembly to a center of the bit; directing the fluid through at least one peripheral port or nozzle whose axis does not intersect with a surface of a bore of the drill bit; distributing the fluid through ports or nozzles coupled to a plurality of blades and junk slot areas distributed circumferentially around a center axis; and directing fluid with a plurality of ports or nozzles to the cutting elements for cleaning and cooling.
Claims19
A rotary drill bit for drilling a hole in a subsurface formation, comprising:
- a plurality of blades distributed circumferentially around a center axis;
- a bore communicating hydraulic fluid to the center of the bit with at least one port whose axis does not intersect with a surface of the bore of the bit;
- a plurality of cutting elements each fixedly mounted on a respective one of the plurality of radially extending blades;
- and
- wherein the port is in fluid communication with a bit body flow path for directing fluid to a respective one of the plurality of cutting elements without initially contacting the borehole surface and wherein the plurality of cutting elements positioned on a region between a center axis and a gauge of the bit face have corresponding nozzles.
A method for drilling with a drill bit, comprising:
- communicating a fluid from a bottom hole assembly through a bore of a bit to a center of the bit;
- directing the fluid through at least one peripheral port or nozzle whose axis does not intersect with a surface of a the bore of the drill bit;
- distributing the fluid through the ports or nozzles coupled to a plurality of blades and junk slot areas distributed circumferentially around a center axis;
- and
- directing the fluid with the ports or nozzles to a plurality of cutting elements for cleaning and cooling.
A drill system, comprising:
- a bore communicating hydraulic fluid to a center of the a drill bit with at least one port whose axis does not intersect with a surface of the bore of the drill bit;
- cutting elements cooled by the hydraulic fluid;
- and
- wherein the at least one port comprises a network of coolant channels with a plurality of primary channels and a plurality of secondary channels,
- wherein the primary channels extend substantially parallel to the longitudinal axis of the drill bit and the secondary channels branch from the primary channels and extend towards one or more blades,
- wherein the network of coolant channels is configured to provide a predetermined volume flow of hydraulic fluid through the bit body;
- and the network of coolant channels, and
- wherein the primary channels have a larger cross-sectional area than the secondary channels, and wherein at least some of the secondary channels terminate at fluid outlets positioned proximate to the cutting elements.
The system of 18, wherein the channels are angled or curved channels.
Dependencies are inferred from the claim text.