Sandvik Intellectual Property Ab

Ulterra Drilling Technologies, L.p.

Rob A Simmons

Carl Aron Deen

Andrew David Murdock

Matthew Floyd Shofner

Earth boring tools with a plurality of fixed cutters have side rake or lateral rakes configured for improving chip removal and evacuation, drilling efficiency, and/or depth of cut management as compared with conventional arrangements.

Earth boring tool with improved arrangements of cutter side rakes

Earth boring tool with improved arrangement of cutter side rakes

A down-the-hole hammer includes a piston movably disposed in a casing and a percussion bit at an end of the casing. The percussion bit includes an integral bit and shank and a pilot removably fastened at a forward end of the bit. A method of enlarging a preexisting hole is also provided.

Down-the-hole hammer with pilot and method of enlarging a hole

A rock drilling bit includes at least one button having a button sidewall and button bottom, the button sidewall and the button bottom having a button sidewall geometry and a button bottom geometry, respectively. The rock drilling bit further comprises a bit body having at least one button-receiving hole having a hole sidewall and a hole bottom, the hole sidewall and the hole bottom having a hole sidewall geometry complementary to the button sidewall geometry and a hole bottom geometry, and a deformable seat compressed between the buttom bottom and the hole bottom so that the seat conforms to a hole bottom geometry and the button bottom geometry. The seat comprises tin.

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Arlington, TX, United States of America

Rob A Simmons