EP0154936A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
An exposed polycrystalline diamond mounted in a matrix body drill bit
Assignee: Baker Hughes Oilfield Operations LLC
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Filing: 1985-03-07
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Granted: —
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Expires: 2005-03-07
Abstract
Abstract A polycrystalline diamond body (10) is securely retained on the surface (17) of a matric body bit (11) while being substantially exposed and unsupported above the matrix surface (18) by partial, unsupported disposition of the diamond body (10) below the surface (20) of the matrix material (18) in such a manner that at least two locking points (26) on the diamond body (10) and between the diamond body (10) and matrix material (18) are established. More particularly, depending upon the geometric shape of the diamond body (10), the diamond body (10) is disposed within the matrix material (18) and extends above the surface (20) of the matrix material (18) by at least 50% of the volume of the diamond (10) and at an orientation such that one or more sides or surfaces (14) of the diamond body (10) are inclined with respect to the normal to the surface (20) of the matrix material (18), so that when the matrix material (18) is molded about the inclined surfaces (14) of the diamond body (10) a locking wedge is formed thereover.
Inventors
- 👤 Jimmy L. Carroll
- 👤 Richard H. Grappendorf
- 👤 Alexander K. Meskin
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 21:42
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; E21B10/56; E21B10/567; E21B10/5673
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
90 words
A cutter in a drill bit made of matr.ix material comprising: a diamond body disposed in said matrix material of said drill bit and substantially exposed above the surface of the drill bit, said diamond body having a predetermined configuration, said diamond body being disposed in said matrix material to establish at least two locking points between said diamond body and said matrix material, whereby said diamond body is securely retained in said drill bit while allowing substantial exposure of said diamond body above the surface of said drill bit.
Claim 2
Dependent Claim
90 words
A cutter in a drill bit made of matr.ix material comprising: a diamond body disposed in said matrix material of said drill bit and substantially exposed above the surface of the drill bit, said diamond body having a predetermined configuration, said diamond body being disposed in said matrix material to establish at least two locking points between said diamond body and said matrix material, whereby said diamond body is securely retained in said drill bit while allowing substantial exposure of said diamond body above the surface of said drill bit.
Claim 3
Dependent Claim
26 words
The cutter of Claim 1 wherein said diamond body is disposed in said matrix material of said drill bit to establish a plurality of locking points.
Claim 4
Dependent Claim
23 words
The cutter of Claim 1 wherein said at least two locking points are disposed on said diamond body at diametrically opposing points thereon.
Claim 5
Dependent Claim
34 words
The cutter of Claim 2 wherein said plurality of locking points are established between said diamond body and matrix material to include at least two subpluralities locking points diametrically disposed on said diamond body.
Claim 6
Dependent Claim
41 words
The cutter of Claim 1 wherein said diamond body is disposed within said matrix material and wherein more than one-third of at least one linear dimension of said diamond body is exposed and extends above the surface of said drill bit.
Claim 7
Dependent Claim
37 words
The cutter of Claim 1 wherein said diamond body is a triangular prismatic element and wherein more than 30 percent of the height of said triangular prismatic element is exposed above the surface of said drill bit.
Claim 8
Dependent Claim
64 words
The cutter of Claim 6 wherein said triangular prismatic element is characterised by two opposing triangular faces and three interconnecting adjacent sides therebetween, said triangular prismatic elements disposed in said matrix material of said drill bit so that one of said sides forms a base disposed within said matrix material and said adjacent two sides are exposed above the surface of said matrix material.
Claim 9
Dependent Claim
33 words
The cutter of Claim 1 wherein said surface of said matrix material is locally planar above said diamond body thereby leaving said diamond body exposed above said surface of said matrix material unsupported.
Claim 10
Dependent Claim
101 words
The cutter of Claim 2 wherein said diamond body is rectangular,. said rectangular diamond body characterised by at least one fully exposed face and an opposing face disposed at least in part beneath said surface of said matrix material, said exposed face and opposing face of said rectangular diamond body being inclined with respect to the normal of said surface at the location of said cutter thereby inclining at least one corner of said rectangular diamond body above at least one other corner of said rectangular diamond body, said locking points being established at said higher one of said inclined corners.
Claim 11
Dependent Claim
83 words
The cutter of Claim 2 wherein said diamond body is generally cylindrical and is characterised by a longitudinal axis of symmetry, said diamond body being disposed at least in part within said matrix material such that said axis of symmetry is inclined with respect to the normal to said surface of said matrix material at the location of said diamond body, said plurality of locking points being established at a higher inclined side of said cylindrical diamond body disposed within said matrix material.
Claim 12
Dependent Claim
103 words
The cutter of Claim 2 wherein said diamond body is a triangular prismatic' element characterised by two opposing triangular faces and three ' adjacent sides therebetween, said triangular prismatic element further being characterised by a longitudinal axis generally parallel to each of said sides, said diamond body being disposed in part within said matrix material such that said longitudinal axis is inclined with respect to the normal of said surface of said matrix material at the location of said diamond body, said plurality of locking points being established at least at one raised corner of said triangular face disposed within said matrix material.
Claim 13
Dependent Claim
88 words
The cutter of Claim 2 wherein said diamond body is generally ovulate and is characterised by a major axis, said ovulate diamond body being disposed within said matrix material in part with said major axis inclined with respect to the normal of said surface of said matrix material at the location of said ovulate diamond body, said plurality of locking points being established in the proximity of said surface of said matrix material adjacent to that portion of said ovulate body acutely inclined with respect to said surface.
Claim 14
Dependent Claim
67 words
The cutter of Claim 2 wherein said diamond body is a plate-like body defining a normal axis to said plate-like body, said normal axis of said plate-like body being inclined with respect to the normal of said surface of said matrix material at the location of said diamond body, said plurality of locking points being established at a portion of said plate-like body disposed beneath said surface.
Claim 15
Dependent Claim
13 words
The cutter of Claim 13 wherein said plate-like body is a circular disk.
Claim 16
Dependent Claim
15 words
The cutter of Claim 13 wherein said plate-like body is a triangular shaped diamond slab.
Claim 17
Dependent Claim
16 words
The cutter of Claim 13 wherein said plate-like body is an elongated triangular prismatic diamond element.
Claim 18
Dependent Claim
15 words
The cutter of Claim 13 wherein said plate-like body is an elongated rectangular prismatic element.
Claim 19
Dependent Claim
14 words
The cutter of Claim 13 wherein said plate-like body is a trapezoidal prismatic element.
Claim 20
Dependent Claim
14 words
The cutter of Claim 13 wherein said plate-like body is an elongated cylindrical element.
Claim 21
Dependent Claim
112 words
A diamond cutter for use in a rotating drill bit, said drill bit made of matrix material, said matrix material defining a surface of said drill bit, said cutter comprising a polycrystalline diamond body having a predetermined shape and disposed within said matrix material of said drill bit in a predetermined configuration, said configuration of disposition within said matrix material determined by said shape of said diamond body so that a plurality of locking points are established on said diamond body between said diamond body and said matrix material, whereby said diamond cutter is securely attached to said drill bit while permitting substantial unsupported exposure above said surface of said drill bit.
Claim 22
Dependent Claim
112 words
A diamond cutter for use in a rotating drill bit, said drill bit made of matrix material, said matrix material defining a surface of said drill bit, said cutter comprising a polycrystalline diamond body having a predetermined shape and disposed within said matrix material of said drill bit in a predetermined configuration, said configuration of disposition within said matrix material determined by said shape of said diamond body so that a plurality of locking points are established on said diamond body between said diamond body and said matrix material, whereby said diamond cutter is securely attached to said drill bit while permitting substantial unsupported exposure above said surface of said drill bit.
Claim 23
Dependent Claim
112 words
An improvement in a diamond drill bit incorporating a plurality of the diamond cutters, each diamond cutter incorporating a diamond body attached to said drill bit, said drill bit made of matrix material, said matrix material defining a surface of said drill bit, wherein said improvement comprises a predetermined unsupported disposition of each diamond body of each cutter of said drill bit into said matrix material to establish at least two locking points on each said diamond body and between each said diamond body and matrix material, whereby said diamond body is securely retained on said drill bit while allowing substantial exposure of said diamond above said surface of said matrix material.
Claim 24
Dependent Claim
112 words
An improvement in a diamond drill bit incorporating a plurality of the diamond cutters, each diamond cutter incorporating a diamond body attached to said drill bit, said drill bit made of matrix material, said matrix material defining a surface of said drill bit, wherein said improvement comprises a predetermined unsupported disposition of each diamond body of each cutter of said drill bit into said matrix material to establish at least two locking points on each said diamond body and between each said diamond body and matrix material, whereby said diamond body is securely retained on said drill bit while allowing substantial exposure of said diamond above said surface of said matrix material.
Claim 25
Dependent Claim
85 words
A diamond cutter for use in a matrix drill bit defining a drill bit face comprising: a PCD element disposed within said matrix bit and extending above said bit face, said diamond element oriented therein to acutely incline at least one surface of said element with respect to the normal to said bit face at the location of said diamond element to form a locking wedge of said matrix material thereover, whereby an unsupported diamond cutter is provided with substantial exposure above said bit face.
Claim 26
Dependent Claim
85 words
A diamond cutter for use in a matrix drill bit defining a drill bit face comprising: a PCD element disposed within said matrix bit and extending above said bit face, said diamond element oriented therein to acutely incline at least one surface of said element with respect to the normal to said bit face at the location of said diamond element to form a locking wedge of said matrix material thereover, whereby an unsupported diamond cutter is provided with substantial exposure above said bit face.
References Cited (Backward Citations)
No citation records indexed.
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