Patent ID: 9341026
Filing Date: 2016-05-17
CPC Classification: E21B

Claim Text:
1. An apparatus for modifying sidewalls of a borehole, comprising: a longitudinal housing configured to fit inside the borehole, wherein the housing has a longitudinal axis, a first end portion, a second end portion, and a side portion extending between said end portions, wherein the side portion is configured to face the sidewalls of the borehole; a cutting member extending from the side portion of the housing, wherein the cutting member comprises a mill configured to rotate relative to the housing and remove material from said borehole sidewall as the housing advances axially into the borehole, and wherein said housing is configured to be rotated with a controlled rotational speed in relation to said borehole sidewalls and to be axially advanced relative to the borehole at a controlled rate of longitudinal motion; and an actuator configured to rotate the mill it of the rotation of the housing.