Extended drill bit nozzle having side discharge ports
AssigneeDresser Industries, Inc.
InventorDean T. Higgins
Life of this patent
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Abstract
A replaceable fluid nozzle is provided for well hole drill bits. The nozzle includes a main discharge port directed downward between adjacent cutting cones of the drill bit, and two side discharge ports directed toward the leading and trailing cutter cone backfaces, respectively. The side discharge ports direct jets of drilling fluid to wash away formation fines and shale packings from around the cutter cone bearing seals. The side jets of fluid remove abrasive particles to prolong the life of the cutter cone bearings and seals.
Claims5
A fluid nozzle for a well hole drill bit having a plurality of cutter cones mounted on a respective plurality of drill bit shirttails, comprising:
- a body having a top, a bottom and a sidewall;
- said body having a central aperture extending therethrough from said top to said bottom, and being mounted on the drill bit between adjacent cutter cones and extending toward the plurality of cutter cones, such that drilling fluid passes through said central aperture into an area between adjacent cutter cones;
- a first channel formed in said body and extending through said sidewall, said first channel being in fluid communication with said central aperture and disposed at an angle to said central aperture, such that drilling fluid passes through said first channel into an area between a backface of a leading cutter cone and a respective leading shirttail;
- and
- a second channel formed in said body and extending through said sidewall, said second channel being spaced apart from said first channel and in fluid communication with said central aperture and disposed at an angle to said central aperture, such that drilling fluid passes through said second channel into an area between a backface of a trailing cutter cone and a respective trailing shirttail.
Dependencies are inferred from the claim text.