Schlumberger Technology Corporation

Wellbore Integrity Solutions LLC

Timothy Andrew Burdett

Yuri Y Burhan

Manoj D Mahajan

James Anthony Barnhouse, Jr

Kenneth Daniel Hora

Vincente S Salvo

Sudarsanam Chellappa

Jianbing Hu

Zhenbi Su

Christopher Glass

Vijayakumar Palani

Systems, tools, and methods include using a milling assembly with a mill having multiple, different types of cutting element inserts. A gage region of the mill includes a first type of cutting element insert, and a shoulder region of the mill includes a second type of cutting element insert. One cutting element insert may include chip-breaking features, and the other may be a shear or gouging cutting element.

Downhole milling cutting structures

An expandable tool includes a body and a recess extending at least partially through the body from an outer radial surface of the body. A spline insert may be at least partially positioned in the recess and coupled to the body. The spline insert may include a single spline or multiple splines. A cutter block or other expandable member may be at least partially positioned in the recess. The cutter block or other expandable member may include a spline on a side surface thereof, which spline may be engaged with the one or more splines of the spline insert. Engagement between one or more splines of the spline insert and spline of the cutter block or other expandable member may allow the expandable member to move radially outward from a retracted position to an expanded position, and vice versa.

Spline insert for a downhole tool

Growing community of inventors

Houston, TX, United States of America

Timothy Andrew Burdett