EP0157278A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Multi-component cutting element using polycrystalline diamond disks
Assignee: Baker Hughes Oilfield Operations LLC
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Filing: 1985-03-19
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Granted: —
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Expires: 2005-03-19
Abstract
Abstract A diamond cutting table having the geometric characteristics of larger unleached diamond compact products and yet characterised by the physical properties of smaller leached diamond products is fabricated by forming a diamond cutter incorporating a plurality of polycrystalline diamond (PCD) leached disks (12). The PCD leached disks (12) are disposed in array in a cutting slug (10) formed of matrix material (14). The matrix material is disposed between and around the plurality of diamond disks (12) and in one embodiment incorporates a volume distribution of diamond grit. The cutting slug is hot pressed or infiltrated to form an integral mass or table. The diamond table is then bonded to a cutter or directly molded into an integral tooth within a matrix body bit.
Inventors
- 👤 Alexander K. Meskin
- 👤 Clifford R. Pay
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 04:52
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; E21B10/56; E21B10/567; E21B10/5676
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
47 words
A cutter for use in a drill bit comprising: a plurality of thermally stable polycrystalline diamond (PCD) disks; and matrix material forming a cutting slug, said plurality of diamond disks disposed in said cutting slug, whereby an enlarged cutter is fabricated for mounting within said drill bit.
Claim 2
Dependent Claim
47 words
A cutter for use in a drill bit comprising: a plurality of thermally stable polycrystalline diamond (PCD) disks; and matrix material forming a cutting slug, said plurality of diamond disks disposed in said cutting slug, whereby an enlarged cutter is fabricated for mounting within said drill bit.
Claim 3
Dependent Claim
27 words
The cutter of Claim 1 wherein said matrix material incorporates diamond grit in at least that portion of said cutting slug where said diamond disks are exposed.
Claim 4
Dependent Claim
23 words
The cutter of Claim 1 wherein said plurality of PCD disks are each formed of prefabricated synthetic PCD formed as right circular disks.
Claim 5
Dependent Claim
25 words
The cutter of Claim 1 wherein said cutting slug formed of said matrix material is characterised by a gross geometric outline of a circular disk.
Claim 6
Dependent Claim
28 words
The cutter of Claim 3 wherein said cutting slug formed of said matrix material is characterised by a gross geometric outline in the shape of a triangular table.
Claim 7
Dependent Claim
30 words
The cutter of Claim 3 wherein said cutting slug formed of said matrix material is further characterised as having a gross geometric shape in the form of a rectangular table.
Claim 8
Dependent Claim
39 words
The cutter of Claim 3 wherein said circular disks are disposed within said cutting slug in an array, said array disposed in compact form wherein each of said PCD disks is immediately proximate to at least one PCD disk.
Claim 9
Dependent Claim
48 words
The cutter of Claim 3 wherein said PCD disks are disposed in an array in said cutting slug wherein said PCD disks are formed in a spaced-apart relationship, said matrix material disposed between each PCD disk and no two PCD disks being in immediate proximity with any other.
Claim 10
Dependent Claim
23 words
The cutter of Claim 1 wherein said matrix material incorporating said diamond incorporates a dispersion of diamond grit uniformly throughout said cutting slug.
Claim 11
Dependent Claim
40 words
The cutter of Claim 1 wherein said cutting slug is characterised by a cutting face, said diamond grit disposed in said matrix material being disposed only in that portion of said cutting slug in the proximity of said cutting face.
Claim 12
Dependent Claim
44 words
The cutter of Claim 1 wherein each of said plurality of .PCD disks has at least one end surface and wherein said cutting slug is characterised by a cutting face, said one end surface of each disk being fully exposed on said cutting face.
Claim 13
Dependent Claim
15 words
The cutter of Claim 1 wherein said cutting slug is mounted on a stud cutter.
Claim 14
Dependent Claim
16 words
The cutter of Claim 1 wherein said cutting slug is disposed within a matrix body tooth.
Claim 15
Dependent Claim
115 words
A diamond cutter in a rotating bit comprising: a plurality of circular leached, prefabricated PCD synthetic disks each having at least one end surface; and a cutting slug formed of matrix material, said plurality of PCD disks disposed within said cutting slug and said matrix material filling between said plurality of PCD disks, said cutting slug characterised by a cutting face, said one end surface of said PCD disks fully exposed on said cutting face, said matrix material forming said cutting slug further comprising diamond grit incorporated at least in that portion of said cutting slug in the proximity of said cutting face, whereby an enlarged diamond cutter is provided for mounting in said bit.
Claim 16
Dependent Claim
115 words
A diamond cutter in a rotating bit comprising: a plurality of circular leached, prefabricated PCD synthetic disks each having at least one end surface; and a cutting slug formed of matrix material, said plurality of PCD disks disposed within said cutting slug and said matrix material filling between said plurality of PCD disks, said cutting slug characterised by a cutting face, said one end surface of said PCD disks fully exposed on said cutting face, said matrix material forming said cutting slug further comprising diamond grit incorporated at least in that portion of said cutting slug in the proximity of said cutting face, whereby an enlarged diamond cutter is provided for mounting in said bit.
Claim 17
Dependent Claim
26 words
The cutter of Claim 14 wherein said diamond grit incorporated within said matrix material forming said cutting slug is substantially uniformly disposed throughout said cutting slug.
Claim 18
Dependent Claim
23 words
The cutter of Claim 15 wherein said cutting slug is characterised by a thickness substantially equal to the thickness of said PCD disks.
Claim 19
Dependent Claim
23 words
The cutter of Claim 16 wherein said cutting slug forms a regular geometric shape, whereby said diamond cutter simulates an integral diamond table.
Claim 20
Dependent Claim
15 words
The cutter of Claim 17 wherein said cutting slug is bonded to a stud cutter.
Claim 21
Dependent Claim
22 words
The cutter of Claim 17 wherein said cutting slug is directly infiltrated into an integral cutting tooth of a matrix body bit.
Claim 22
Dependent Claim
36 words
The cutter of Claim 17 wherein said PCD circular . disks are disposed within said cutting slug in a compact array wherein each said PCD disk is immediately proximate to at least one adjacent PCD disk.
Claim 23
Dependent Claim
54 words
The cutter of Claim 17 wherein said plurality of PCD circular disks are disposed in an array in said cutting slug in a spaced-apart relationship, said diamond bearing matrix material forming said cutting slug disposed between said spaced apart PCD circular disks, no one PCD circular disk being immediately proximate to an adjacent one.
References Cited (Backward Citations)
No citation records indexed.
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