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US 10,538,970 B2Granted
Method for drilling out a plug using a hybrid rotary cone drill bit
AssigneeVarel International Ind., L.P.
InventorsKyle Nobile, Matthew Charles Stroever, David Michel Harrington, Karl W. Rose
Life of this patent
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Abstract
A method for drilling out a plug includes directing a hybrid rotary cone drill bit having a plurality of rotary cones into a borehole lined with a casing. A body of the plug is drilled out using milled teeth formed in the hybrid rotary cone drill bit. A slip of the plug is drilled out using cutter inserts secured into the rotary cone where the slip contacts the casing. The drilled out plug is directed up the borehole using a drilling fluid.
Claims20
A method of drilling out a plug, comprising:
- directing a hybrid drill bit having a plurality of rotary cones into a borehole lined with a casing;
- wherein the hybrid drill bit is configured to drill out multiple sets of slips in at least one plug,
- drilling out a body of the plug using milled teeth formed in each one of the plurality of rotary cones;
- drilling out the slips of the plug using cutter inserts secured into a gage row of each one of the plurality of rotary cones, the slip contacting the casing;
- and
- directing the drilled out plug up the borehole using a drilling fluid, wherein:
- each gage row comprises both milled teeth and cutter inserts, and
- the milled teeth of each gage row are interspersed with the respective cutter inserts.
5 more elements
A method of drilling out a plug, comprising:
- directing a hybrid drill bit having a plurality of rotary cones into a borehole lined with a casing;
- wherein the hybrid drill bit is configured to drill out multiple sets of slips in at least one plug,
- drilling out a body of the plug using an inner cutting structure of the plurality of rotary cones, the inner cutting structure consisting essentially of milled teeth formed in each rotary cone;
- drilling out the slips of the plug using an outer cutting structure of the plurality of rotary cones, the slip contacting the casing and the outer cutting structure consisting essentially of cutter inserts secured into each rotary cone;
- and
- directing the drilled out plug up the borehole using a drilling fluid.
3 more elements
Dependencies are inferred from the claim text.