Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Rolling cone bit with elements fanned along the gage curve










Image Number 6 for United States Patent #6651758.

An earth-boring bit for drilling a borehole comprises a bit body having a bit axis, at least two rolling cone cutters rotatably mounted on the bit body, a plurality of inner row cutter elements positioned on at least one cone cutter in a first inner row, a plurality of gage-cutting cutter elements positioned in a first fanned-gage row on a first one of the one cutters, and a plurality of gage-cutting cutter elements positioned in a second fanned-gage row on a second one of the one cutters, wherein the gage-cutting cutter elements on the bit define a gage curve and cutter elements in the first fanned-gage row and the second fanned-gage row contact the gage curve at different points. In one embodiment, each cutter element has an extension, and the extensions of the uppermost fanned-gage row cutter element and the first inner row cutter element define a step distance such that the ratio of the step distance to the extension of the first inner row cutter element is greater than 0.5. Alternatively, the first and second fanned-gage rows are positioned to have different oversize angles, positioned such that the ratio of the diameter of the largest fanned-gage row cutter element to the diameter of the first inner row cutter elements is not greater than 0.75, or positioned such that the lowermost fanned-gage row contains more cutter elements than any other fanned-gage row.








 
 
  Recently Added Patents
Method for transferring inventory between virtual universes
Three-dimensional filter
Multi-contoured yoga support
Smooth silicon-containing films
Remote device pairing setup
Shape memory polymers formed by self-crosslinking of copolymers
Process and intermediates for preparing lapatinib
  Randomly Featured Patents
Ostomy appliance with floating belt-attachment ring
Releasable coupling device
Extended and editable gamer profile
Structurally stabilized semiconductor nanowire
Kinetically sprayed aluminum metal matrix composites for thermal management
2-amino-pyridine derivatives useful for the treatment of diseases
Process for total hydrogenation using a catalytic reactor with a hydrogen-selective membrane
Deactivating a packet tunnel based on at least one performance characteristic
Apparatus for injecting granular material in soil
Balanced dual rocking piston pumps