Back to results
US 4,200,159 AGranted
Cutter head, drill bit and similar drilling tools
AssigneeChristensen, Inc.
InventorsEberhard Peschel, Hermann Rathkamp, Klaus Katzorke, Rainer Jurgens
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeChristensen, Inc.
InventorsEberhard Peschel, Hermann Rathkamp, Klaus Katzorke, Rainer Jurgens
Estimating the term…
Tool for drilling bore holes and earth formations in which a bit body matrix, including tungsten carbide, has a plurality of carriers secured thereto, to each of which a cutting element is secured by soldering, after the body matrix has been produced, to avoid subjecting the diamond material embodied in the cutting element to the high temperatures required to produce the matrix body, which would have deleterious effects on the diamond. Each carrier has great rigidity and is provided with a plane surface confronted by the plane back surface of the cutting element to provide a desired narrow solder gap between the cutting element and carrier of uniform width, into which the solder is deposited to adhere the cutting element and carrier together, with the load being transmitted directly from the cutter element to the rigid carrier.
A drill bit, comprising a connection body, a basic body of a matrix-binder composition secured to said connection body, cutting structures secured to said basic body, the axis of each cutting structure extending transversely of the bit axis, each of said structures comprising a carrier of high rigidity secured to said basic body and being initially a part separate from said basic body, said carrier having a back face abutting said basic body over substantially the entire area of said back face, and a plurality of cutting members each including a support and diamonds on the front face of said support, said cutting member and its support and diamonds being arranged in substantial alignment with each carrier, basic body and back face of said carrier, each of said cutting members having a back face of said support confronting a forward face of said carrier, and means securing substantially the entire area of said back face of said support to said forward face of said carrier.
A drill bit having an axis around which it is rotated during drilling, comprising a connection body, a basic body of a matrix-binder composition secured to said connection body, cutting structures secured to said basic body and having a long axis of each cutting structure extending transversely of the bit axis, each of said structures comprising a carrier of higher rigidity than the rigidity of said basic body secured to said basic body and being initially a part separate from said basic body, said carrier having a back face abutting said basic body over substantially the entire area of said back face, and a plurality of cutting members each including a support and diamonds on the front face of said support, said cutting member and its support and diamonds being arranged in substantial alignment with each carrier, basic body and back face of said carrier, each of said cutting members having a back face of said support confronting a forward face of said carrier, and means securing substantially the entire area of said back face of said support to said forward face of said carrier, each of said front faces being transverse to the axis of its cutting structure and facing in the direction in which said cutting member is cutting.
Dependencies are inferred from the claim text.