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US 2021/0262293 A1Published application
Staged underreamer cutter block
AssigneeSchlumberger Technology Corporation
InventorPhilip G. TRUNK
Life of this patent
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Abstract
A downhole assembly includes a bit and a cutting tool uphole of the bit. The cutting tool has one or more expandable cutter arms. The one or more expandable cutter arms include at least one stabilizer portion having a radial position that is about the same as a gauge of the bit when the one or more expandable cutter arms are in an expanded position. A spline on the cutter arms are used by a cutting tool to move the cutter arms.
Claims18
A downhole assembly, comprising:
- a bit;
- and
- a cutting tool uphole of the bit, the cutting tool having one or more expandable cutter arms that include at least one stabilizer portion having a radial position that is about the same as a gauge of the bit when the one or more expandable cutter arms are in an expanded position.
A method for expanding a diameter of a wellbore, comprising:
- tripping an underreamer into a wellbore while the underreamer is in a retracted position;
- expanding a plurality of cutter blocks to transition the underreamer into an expanded position, the plurality of cutter blocks including a first cutter block including a stabilizer pad that, when the first cutter block is expanded, has a radial position about equal to a pilot size of the wellbore;
- and
- degrading formation around the wellbore by moving the underreamer axially and rotationally within the wellbore.
1 more element
Dependencies are inferred from the claim text.