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OwnerBjorn Claesson, Lennart Karlsson +2inventors
InventorsBjorn Claesson, Lennart Karlsson, Johan Linden, Lars-Gunnar Lundell
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A rotary cone drill bit includes at least one leg carrying a journal provided with bearing surfaces cooperating via bearing elements with bearing races in a rotatable cone cutter. The cone cutter is provided with rows of crushing elements. Each crushing element has a greatest width (D) and a greatest height (H), wherein HID<1.2. The crushing elements are welded to the body of the cone cutter to form a metallurgical bond therewith.
A rotary cutting head for cutting rock by crushing, comprising:
A crushing element adapted for use on a rotary cone cutter, the crushing element comprising a cemented carbide body having a top working portion, an opposing bottom mounting portion of generally conical shape, and an intermediate portion from which the mounting portion extends, the crushing element having a greatest width D at the intermediate portion, and a greatest height H extending from a tip of the mounting portion to a transition between the intermediate portion and the mounting portion, wherein H/D<1.2.
A rotary cone cutter adapted to be rotatably mounted on a rotary cutting head, the cone cutter comprising a base body, and rows of welded-on crushing elements adhered to the base body by metallurgical bonds, each crushing element comprising a body having a working portion, an opposing mounting portion, and an intermediate portion from which the working mounting portions extend, each crushing element having a greatest width D at the intermediate portion, and a greatest height H extending from a tip of the working portion to a transition between the intermediate portion and the mounting portion, wherein H/D<1.2.
A method of manufacturing a rotary rock-crushing cone cutter comprising the steps of:
Dependencies are inferred from the claim text.