Cutter Support Element

摘要

Cutters mounted on bits for advancing boreholes are subject to extreme forces that can separate the cutter from the bit. A cutter backing element with a rearward extending lug and forward face can provide support to the cutter. The backing element is attached to the back face of the cutter and the lug of the backing element is received in a recess of the bit. The backing element can be brazed to the bit and the cutter. The lug is offset from a longitudinal axis of the backing element. Forces applied to the front of the cutter during drilling operations are transferred through the cutter to the backing element and to the bit through the offset lug.

主权项

1. A backing element to be installed to a drill bit with a blade including:
a body with a forward face and a first longitudinal axis normal to the forward face; and a lug offset from the longitudinal axis extending rearward from the body for acceptance in a recess of the blade; where the body front face contacts a back face of a cutter and force applied to the front of the cutter is transferred through the backing element rearward through the offset lug into the blade of the bit.