Cutter Support Element
AssigneeUlterra Drilling Technologies, L.P.
InventorJason Maw
Life of this patent
Estimating the term…
Abstract
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.
Claims19
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.
A method of supporting a cutter on a drill bit comprising:
- receiving a backing element including an offset lug in a first recess in the bit;
- receiving the cutter in a second recess of the bit adjacent the backing element;
- bonding a front face of the backing element to a back face of the received cutter;
- and
- bonding the backing element in the recess of the bit.
A drill bit comprising:
- a drill bit body with blades;
- a cutter with a rear face;
- a cutter support with a front face and an offset lug extending rearward spaced from the front face;
- a recess in the bit for receiving the lug;
- and
- a seat in the bit for receiving the cutter;
- where the front face of the cutter support abuts the rear face of the cutter substrate with the lug received in the recess and the cutter received in the seat.
Dependencies are inferred from the claim text.