Manufacture of roller cone drill bits
AssigneesKing Dream Public Limited Company, Taurex Drill Bits, LLC
InventorsYongzhong Cai, Dongze Yang, Yuan Yi, Dustin Lyles, Terry Vance Morris
Life of this patent
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Abstract
A method of manufacturing a roller cone includes machining a cone blank and thereby defining one or more land surfaces and one or more insert grooves on the cone blank, surface hardening the cone blank, and milling a plurality of recesses into at least one of the one or more land surfaces. The method further includes subjecting the cone blank to a quenching process, forming an insert hole at each recess, and inserting an insert into each insert hole.
Claims20
A method of manufacturing a roller cone, comprising:
- machining a cone blank and thereby defining one or more land surfaces and one or more insert grooves on the cone blank;
- surface hardening the cone blank;
- milling a plurality of recesses into at least one of the one or more land surfaces;
- subjecting the cone blank to a quenching process;
- forming an insert hole at each recess;
- and
- inserting an insert into each insert hole.
A roller cone, comprising:
- a cone blank that defines one or more land surfaces and one or more insert grooves;
- a plurality of recesses milled into at least one of the one or more land surfaces;
- an insert hole defined at each recess;
- and
- an insert received within each insert hole,
- wherein the cone blank is surface hardened prior to milling the plurality of recesses, and
- wherein the cone blank is subjected to a quenching process prior to defining the insert holes at each recess and after the plurality of recesses is milled.
A method of drilling, comprising:
- lowering a drill bit into a wellbore, the drill bit comprising a roller cone drill bit having a plurality of roller cones, and each roller cone comprising:
- a cone blank that defines one or more land surfaces and one or more insert grooves;
- a plurality of recesses milled into at least one of the one or more land surfaces;
- an insert hole defined at each recess;
- and
- an insert received within each insert hole, wherein the cone blank is surface hardened prior to milling the plurality of recesses, and wherein the cone blank is subjected to a quenching process prior to defining the insert holes at each recess and after the plurality of recesses is milled;
- rotating the drill bit within the wellbore.
Dependencies are inferred from the claim text.