Nov Downhole Eurasia Limited

Haydn G Smith

Terry R Matthias

Graham Watson

Mark Jonathan Francis

Alan Honggen Jiang

A rotary downhole tool, for example in the form of a drill bit, is described that includes a tool body, the body defining a gauge region, and at least one gauge roller rotatably mounted to the body.

Rotary downhole tool

A cutting element comprises a table of superhard material bonded to a substrate, wherein the table defines a cutting edge and has a chamfered peripheral edge, and a groove in a sidewall of the cutting element passes through the chamfered peripheral edge, so as to reduce the depth of the chamfer at the location of the groove.

Cutting element

A cutting element comprises a primary cutter including a first table of a hard material bonded to a first substrate of less hard form, the first substrate of the primary cutter having a recess formed therein in which a secondary cutter is located, the secondary cutter comprising a second table of a hard material bonded to a second substrate of less hard material, the first and second tables being spaced apart from one another by at least part of the first substrate.

Growing community of inventors

Dursley, United Kingdom

Haydn G Smith