Back to results
US 7,621,350 B2Granted
Impregnated bit with changeable hydraulic nozzles
AssigneeBaker Hughes Incorporated
InventorVolker Richert
Life of this patent
Estimating the term…
Abstract
A diamond impregnated bit crown has blades formed thereon. Flow channels are formed between the blades, the flow channels having inner and outer ends and extending outward to a gage surface of the crown. At least some of the flow channels have an enlarged width area that has a greater width than a portion of the channel immediately outward from the enlarged width area. A nozzle is releasably secured in each of the enlarged width areas for discharging drilling fluid.
Claims7
An earth boring bit, comprising:
- a diamond impregnated crown having an axis of rotation, a gage area, and a plurality of blades formed thereon;
- a first set of channels formed between some of the blades and extending outward to the gage area, each channel of the first set of channels having an enlarged width area joining a diverging width area that increases in width to the gage, the junction between the enlarged width area and the diverging width being smaller in width than a maximum width of the enlarged width area;
- a nozzle port formed in each of the enlarged width areas;
- a nozzle releasably fastened to each of the nozzle ports;
- a second set of channels formed between some of the blades and extending outward to the gage area;
- and
- a fixed port located in each channel of the second set of channels, each of the fixed ports being of smaller diameter than each of the nozzle ports and not having any of the nozzles therein.
4 more elements
Dependencies are inferred from the claim text.