Cavitating liquid jet assisted drill bit and method for deep-hole drilling
Patent 4391339 Issued on July 5, 1983. Estimated Expiration Date: 
December 1, 2000. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
December 1, 2000. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2175160 2868512 3129777 3207241 3528704 High velocity liquid jet cutting nozzle Drilling bit fluid-cooled friction bearing Patent #: 4193463 InventorsAssigneeApplicationNo. 06/211662 filed on 12/01/1980US Classes:175/393, With fluid conduit lining or element (e.g., slush tube)175/340, Fluid conduit lining or element (e.g., slush tube or nozzle)175/424, MISCELLANEOUS (E.G., EARTH-BORING NOZZLE)175/67, Boring by fluid erosion239/589RIGID FLUID CONFINING DISTRIBUTORExaminersPrimary: Pate, III, William F.Attorney, Agent or FirmInternational ClassesE21B 10/08 (20060101)E21B 10/18 (20060101) E21B 10/60 (20060101) E21B 10/00 (20060101) E21B 7/18 (20060101) AbstractA drill bit and a method for deep-hole drilling in which the drill bit has mechanical cutting means located on its lower cutting face for cutting a solid surface upon rotation of the bit and a plurality of cavitating liquid jet nozzles spaced around the face of the bit to assist in the drilling action, the nozzles being located so as to discharge a plurality of downwardly directed and concentric liquid jets that cavitate to fracture the surface to be drilled in a series of non-overlapping slots as the bit is rotated.Field of SearchRIGID FLUID CONFINING DISTRIBUTOR | |
