EP0086086A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Cutting device, a tool including a cutting device and a method of making a cutting device
Assignee: Boart International Ltd
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Filing: 1983-02-03
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Granted: —
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Expires: 2003-02-03
Abstract
Abstract A coring bit comprises a number of cutting devices separated by waterways. On the cutting faces of the devices are small synthetic grit particles arranged spaced apart from one another along a plurality of spaced radial lines transverse to the cutting direction of the cutting devices. The diamond grit particles are in laterally overlapping dispositions along the cutting direction. The particles have a maximum face coverage percentage of 40% and a maximum size of 25 US mesh. The particles may be arranged in a mono-layer, in a plurality of layers or on a plurality of steps in the cutting direction.
Inventors
- 👤 Cedric Peter Leslie Franks
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 14:45
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; E21B10/48; B; B23; B23P; B23P15/00; B23P15/28; B24; B24D; B24D18/00; B24D7/00; B24D7/02
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
102 words
A cutting device including cutting elements set in matrix material, having a cutting face and having an intended cutting direction across the face, the cutting elements being arranged spaced apart from one another along a plurality of lines transverse to the cutting direction with .the lines extending across the width of the cutting face and with the lines being spaced from one another along the cutting direction, the cutting elements of the lines being in laterally overlapping dispositions along the cutting direction, and the cutting elements having a maximum face coverage percentage of 40% and a maximum size of 25 US mesh.
Claim 2
Dependent Claim
102 words
A cutting device including cutting elements set in matrix material, having a cutting face and having an intended cutting direction across the face, the cutting elements being arranged spaced apart from one another along a plurality of lines transverse to the cutting direction with .the lines extending across the width of the cutting face and with the lines being spaced from one another along the cutting direction, the cutting elements of the lines being in laterally overlapping dispositions along the cutting direction, and the cutting elements having a maximum face coverage percentage of 40% and a maximum size of 25 US mesh.
Claim 3
Dependent Claim
19 words
A cutting device as claimed in claim 1 wherein the maximum face coverage percentage is between 25% and 1%
Claim 4
Dependent Claim
19 words
A cutting device as claimed in claim 2 wherein the maximum face coverage percentage is between 20% and 2%.
Claim 5
Dependent Claim
19 words
A cutting device as claimed in claim 3 wherein the maximum face coverage percentage is between 2.5% and 18%.
Claim 6
Dependent Claim
22 words
A cutting device as claimed in claim 1 wherein the cutting element size is in the range 25 to 40 US mesh.
Claim 7
Dependent Claim
26 words
A cutting device as claimed in claim 1 wherein the lateral overlap of cutting elements is between 0.1 and 0.9 times the maximum particle diameter (MPD).
Claim 8
Dependent Claim
22 words
A cutting device as claimed in claim 6 wherein the lateral overlap of cutting elements is between 0.3 and 0.35 times MPD.
Claim 9
Dependent Claim
22 words
" A cutting device as claimed in claim 1 wherein the lines in which the cutting elements are arranged are straight lines.
Claim 10
Dependent Claim
25 words
A cutting device as claimed in claim 8 wherein the lines in which the cutting elements are arranged are substantially perpendicular to the cutting direction.
Claim 11
Dependent Claim
31 words
A cutting device as claimed in claim 9 which is arcuate in shape wherein the lines in which the cutting elements are arranged are radial of the axis of the device.
Claim 12
Dependent Claim
128 words
A cutting device including cutting elements set in matrix material, having a cutting face and having a cutting direction, the cutting elements being arranged spaced apart from one another along lines transverse to the cutting direction with the lines extending across the width of the cutting face and with the lines being spaced from one another along the cutting direction, the cutting elements along the cutting direction of the lines being in laterally overlapping dispositions and the cutting elements being arranged in a three dimensional array in the matrix material with at least some of the lines being in layers parallel to and spaced from the cutting face and with the cutting elements in each layer being in laterally overlapping dispositions across the width of the cutting face.
Claim 13
Dependent Claim
128 words
A cutting device including cutting elements set in matrix material, having a cutting face and having a cutting direction, the cutting elements being arranged spaced apart from one another along lines transverse to the cutting direction with the lines extending across the width of the cutting face and with the lines being spaced from one another along the cutting direction, the cutting elements along the cutting direction of the lines being in laterally overlapping dispositions and the cutting elements being arranged in a three dimensional array in the matrix material with at least some of the lines being in layers parallel to and spaced from the cutting face and with the cutting elements in each layer being in laterally overlapping dispositions across the width of the cutting face.
Claim 14
Dependent Claim
58 words
A cutting device as claimed in claim 11 wherein the cutting elements in one layer overlap the cutting elements in an adjacent layer, with the amount of overlap being such that in.the transition, in use, between layers the maximum face coverage percentage (MFCP) is less than 40% for the total number of cutting elements in the adjacent layers.
Claim 15
Dependent Claim
20 words
A cutting device as claimed in claim 12 wherein the amount of vertical overlap is between 30% and 65% MPD.
Claim 16
Dependent Claim
106 words
A cutting device including cutting elements set in matrix material, . having a cutting face and having a cutting direction, the cutting elements being arranged spaced apart from one another along lines transverse to the cutting direction with the lines extending across:the width of the cutting face and with the lines being spaced from one another along the cutting direction, the cutting elements along the cutting direction of the lines being in laterally overlapping dispositions and the cutting face comprising a plurality of parallel decks which extend transversely to the cutting direction and on each of which is set at least one pair of cutting elements.
Claim 17
Dependent Claim
106 words
A cutting device including cutting elements set in matrix material, . having a cutting face and having a cutting direction, the cutting elements being arranged spaced apart from one another along lines transverse to the cutting direction with the lines extending across:the width of the cutting face and with the lines being spaced from one another along the cutting direction, the cutting elements along the cutting direction of the lines being in laterally overlapping dispositions and the cutting face comprising a plurality of parallel decks which extend transversely to the cutting direction and on each of which is set at least one pair of cutting elements.
Claim 18
Dependent Claim
14 words
A cutting tool including at least one cutting device as claimed in claim 1.
Claim 19
Dependent Claim
14 words
A cutting tool including at least one cutting device as claimed in claim 11.
Claim 20
Dependent Claim
14 words
A cutting tool including at least one cutting device as claimed in claim 14.
Claim 21
Dependent Claim
40 words
A cutting tool as claimed in claim 15 in the form of a rotary bit the cutting face of which has a corner on at least one side thereof wherein the said corner is reinforced with additional lateral cutting elements.
Claim 22
Dependent Claim
29 words
A cutting tool as claimed in claim 18 wherein the said lateral cutting elements are slightly larger than the cutting elements on the cutting face intermediate the lateral edges.
Claim 23
Independent Claim
120 words
A method of making a cutting device comprising (a) placing a scoop having a surface formed with a desired array of holes on the surface of a body of discrete cutting elements; (b) applying a vacuum to the interior of the housing to cause cutting elements to be drawn partially into each of the holes; (c) removing the housing from the body of cutting elements; (d) placing carrier means having a tacky adhesive on at least one side thereof in contact with the cutting elements to cause the cutting elements thereto; (e) removing the vacuum; (f) placing the carrier means with adhered cutting elements in a die; (g) pouring matrix material into the die; and (h) hardening the matrix material.
Claim 24
Independent Claim
120 words
A method of making a cutting device comprising (a) placing a scoop having a surface formed with a desired array of holes on the surface of a body of discrete cutting elements; (b) applying a vacuum to the interior of the housing to cause cutting elements to be drawn partially into each of the holes; (c) removing the housing from the body of cutting elements; (d) placing carrier means having a tacky adhesive on at least one side thereof in contact with the cutting elements to cause the cutting elements thereto; (e) removing the vacuum; (f) placing the carrier means with adhered cutting elements in a die; (g) pouring matrix material into the die; and (h) hardening the matrix material.
Claim 25
Dependent Claim
50 words
A method as claimed in claim 20 wherein a plurality of carrier means each with adhered cutting elements is formed, wherein the ,carrier means are stacked in a die with a predetermined quantity of matrix material being inserted between adjacent carrier sheets, and the body so formed is then hardened.
Claim 26
Dependent Claim
21 words
A method as claimed in claim 20 wherein the carrier means comprises a material that volatilises when the matrix is densified.
Claim 27
Dependent Claim
25 words
A method as claimed in claim 20 wherein the carrier means comprises a material that that will form part of the matrix itself after densification.
Claim 28
Dependent Claim
27 words
A hollow scoop for use in the method claimed in claim 20 comp-- rising a surface consisting of a plate formed with an array of holes therein.
Claim 29
Dependent Claim
19 words
A scoop as claimed in claim 24 wherein the array of holes is formed by a photographic etching processes.
References Cited (Backward Citations)
No citation records indexed.
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