US4200159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutter head, drill bit and similar drilling tools
Assignee: General Electric Co
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Filing: 1977-12-02
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Granted: 1980-04-29
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Expires: 1997-12-02
Abstract
Abstract 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.
Inventors
- 👤 Eberhard Peschel
- 👤 Hermann Rathkamp
- 👤 Klaus Katzorke
- 👤 Rainer Jurgens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:12
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/42; E21B10/43; B; B22; B22F; B22F7/00; B22F7/06; E21B10/46; E21B10/56; E21B10/567; E21B10/573
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
165 words
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.
Claim 2
Dependent Claim
165 words
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.
Claim 3
Dependent Claim
17 words
A drill bit as defined in claim 1; each carrier for a cutting member consisting of steel.
Claim 4
Dependent Claim
15 words
A drill bit as defined in claim 1; each carrier consisting of a hard alloy.
Claim 5
Dependent Claim
14 words
A drill bit as defined in claim 1; each carrier consisting of ceramic material.
Claim 6
Dependent Claim
23 words
A drill bit as defined in claim 1; said securing means being selected from a group consisting of soldering, welding, cementing and shrinking.
Claim 7
Dependent Claim
26 words
A drill bit as defined in claim 5; said carrier being secured by sintering to said basic body during formation of said basic body by sintering.
Claim 8
Dependent Claim
43 words
A drill bit as defined in claim 1; said carrier consisting of multiple parts, one of said parts having said forward face secured to the back face of said cutting member, another of said parts having said rear portion abutting said basic body.
Claim 9
Dependent Claim
24 words
A drill bit as defined in claim 1; each cutting element having a thickness of at least one-half the diameter of said cutting element.
Claim 10
Dependent Claim
33 words
A drill bit as defined in claim 1; each carrier having a side portion closely adjacent to and extending along said basic body, and means securing said side portion to said basic body.
Claim 11
Dependent Claim
54 words
A drill bit as defined in claim 7; said multiple parts of said carrier having smooth adjacent surface for connecting said parts to each other, said forward face of said one part and back face of said cutting member having smooth adjacent surfaces for connecting said one part and cutting member to each other.
Claim 12
Dependent Claim
20 words
A drill bit as defined in claim 1; said basic body having a recess in which said carrier is disposed.
Claim 13
Dependent Claim
30 words
A drill bit as defined in claim 11; said cutting member being disposed in said recess, a portion of the cutting surface of said cutting member projecting from said recess.
Claim 14
Dependent Claim
20 words
A drill bit as defined in claim 1; said carrier having a recess in which said cutting member is disposed.
Claim 15
Dependent Claim
30 words
A drill bit as defined in claim 13; said cutting member being disposed in said recess, a portion of the cutting surface of said cutting member projecting from said recess.
Claim 16
Dependent Claim
19 words
A drill bit as defined in claim 13; said carrier comprising parts interconnecting each other and defining said recess.
Claim 17
Dependent Claim
30 words
A drill bit as defined in claim 1; said basic body having a recess at the rear portion of said carrier, said carrier including a pin projecting into said recess.
Claim 18
Dependent Claim
23 words
A drill bit as defined in claim 16; said recess being cylindrical and said pin being cylindrical and conforming to said cylindrical recess.
Claim 19
Dependent Claim
23 words
A drill bit as defined in claim 16; said recess being conical and said pin being conical and conforming to said conical recess.
Claim 20
Dependent Claim
34 words
A drill bit as defined in claim 16; the forward portion of said carrier projecting from said recess and having said forward face, said cutting member being disposed substantially entirely out of said recess.
Claim 21
Dependent Claim
31 words
A drill bit as defined in claim 1; said cutting member having cutting faces disposed in planes deviating from radial planes passing through the axis of rotation of said drilling tool.
Claim 22
Dependent Claim
21 words
A drill bit as defined in claim 1; and a surface coat of diffusion-enhancing material on said carriers and cutting members.
Claim 23
Dependent Claim
22 words
A drill bit as defined in claim 21; said diffusion-enhancing material being selective from a group consisting of nickle, copper, and cobalt.
Claim 24
Dependent Claim
211 words
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.
Claim 25
Dependent Claim
211 words
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.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-04-29 | 1983-10-29 | 1984-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-29 | 1987-10-29 | 1988-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-29 | 1991-10-29 | 1992-04-29 | $7700.00 | Window Closed / Lapsed |