Patent ID: 11939819
Assignee: HALLIBURTON ENERGY SERVICES, INC.
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 22:
23. A well system, comprising:
a wellbore extending through one or more subterranean formations;
wellbore casing located in at least a portion of the wellbore;
a whipstock located within the wellbore radially inside of the wellbore casing;
a bottom hole assembly extending within the wellbore adjacent the whipstock, the bottom hole assembly having a mill bit, the mill bit including:
a tubular having an uphole end and a downhole end;
a first cutting section having one or more first cutting surfaces disposed about the tubular, the first cutting section having a first material removal rate and configured to engage with wellbore casing disposed within a wellbore at a similar time as the first cutting section is engaged with the wellbore casing; and
a second cutting section having one or more second cutting surfaces disposed about the tubular, the second cutting section having a second material removal rate less than the first material removal rate and configured to engage with a whipstock disposed within the wellbore.