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US4630692A
Expired / Lapsed
US
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Consolidation of a drilling element from separate metallic components
Assignee: POWMET FORGINGS LLC
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Filing: 1985-06-10
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Granted: 1986-12-23
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Expires: 2005-06-10
Abstract
Abstract The method of forming a cutter, which includes a core and a wear resistant insert defining a body means which includes (a) applying to the body means a mixture of: (i) wear resistant metallic powder, and (ii) binder (b) volatilizing the binder, (d) and applying pressure to the body means and powdered metal, at elevated temperature to consolidate same.
Inventors
- 👤 Gunes M. Ecer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:28
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/10; E21B17/1092; B; B22; B22F; B22F3/00; B22F3/12; B22F3/14; B22F3/15; B22F3/22; B22F7/00; B22F7/06; E21B10/00; E21B10/08; E21B10/22; E21B10/46; E21B10/50; E21B10/52; B22F5/00; B22F2005/001
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
124 words
The method of forming a cutter, which includes a core and wear resistant insert defining a body means which includes: (a) applying to the body means a mixture of: (i) wear resistant powder, and (ii) binder said mixture being in fluid state and applied to said body means by one of the following: (i) dipping of the body means into said mixture, (ii) painting said mixture on the body means, (iii) spraying the mixture onto the body means, (b) volatilizing the binder (c) and applying sufficient pressure via a grain bed to the body means and powder at elevated temperature, to consolidate same, (d) at least one of the core and insert being consolidated at the same time as step (c) is carried out.
Claim 2
Independent Claim
124 words
The method of forming a cutter, which includes a core and wear resistant insert defining a body means which includes: (a) applying to the body means a mixture of: (i) wear resistant powder, and (ii) binder said mixture being in fluid state and applied to said body means by one of the following: (i) dipping of the body means into said mixture, (ii) painting said mixture on the body means, (iii) spraying the mixture onto the body means, (b) volatilizing the binder (c) and applying sufficient pressure via a grain bed to the body means and powder at elevated temperature, to consolidate same, (d) at least one of the core and insert being consolidated at the same time as step (c) is carried out.
Claim 3
Dependent Claim
13 words
The method of claim 1 wherein said binder consists essentially of cellulose acetate.
Claim 4
Dependent Claim
16 words
The method of claim 1 wherein said binder also includes a solvent which consists of acetone.
Claim 5
Dependent Claim
25 words
The method of claim 1 wherein said powder is selected from the group consisting of silicon carbide, tungsten carbide, diamond, steel, cobalt, and alloys thereof.
Claim 6
Dependent Claim
28 words
The method of claim 1 wherein said body means is formed by joining multiple inserts to said core to define exposed cutting edges, the inserts being wear resistant.
Claim 7
Dependent Claim
22 words
The method of claim 1 wherein said core prior to said step (c), consists of powdered metal which is not completely consolidated.
Claim 8
Dependent Claim
21 words
The method of claim 5 wherein said core has protrusions to which said inserts are joined by said consolidated powder metal.
Claim 9
Independent Claim
34 words
The method of any of claims 1-4, 5, 6 and 7 wherein said grain bed is located adjacent said body means and mixture, and said pressure is exerted on the bed via a plunger.
Claim 10
Dependent Claim
16 words
The method of claim 1 wherein said grain bed consists essentially of ceramic or refractory particles.
Claim 11
Dependent Claim
20 words
The method of claim 5 wherein said core has multiple protrusions in which multiple of said inserts are initially embedded.
Claim 12
Dependent Claim
24 words
The method of claim 10 wherein said consolidation is carried out to leave edges of said inserts exposed for engagement with an earth formation.
Claim 13
Dependent Claim
24 words
The method of claim 1 including maintaining the consolidated body means and powder at elevated temperature for at least 30 minutes, after said consolidation.
Claim 14
Dependent Claim
17 words
The method of claim 12 wherein said last mentioned elevated temperature is in excess of 1,000° F.
Claim 15
Dependent Claim
23 words
The method of claim 1 wherein both said body means and bed are at temperatures in excess of 2,000° F. during said consolidation.
Claim 16
Dependent Claim
34 words
The method which includes drilling an earth formation using the cutter of claim 16, and in such manner that the consolidated powder wears away as the inserts wear during their earth formation cutting actions.
Claim 17
Dependent Claim
10 words
The consolidated cutter produced by the process of claim 1.
Claim 18
Dependent Claim
10 words
A drill bit incorporating the cutter as claimed in 16.
Claim 19
Dependent Claim
44 words
A drill bit incorporating the cutter as claimed in 16, wherein the powder consists essentially of 20 to 70% by volume of diamond granules mixed with 15-70% by volume of tungsten carbide powder and 10-70% by volume of steel powder, all consolidated as defined.
Claim 20
Dependent Claim
46 words
A drill bit incorporating the cutter as claimed in 16, wherein the powder is an alloy comprising a base selected from the group that consists essentially of iron, nickle and copper, and up to 2.5% by weight carbon and 10 to 80% by weight tungsten carbide.
Claim 21
Dependent Claim
15 words
The cutter of claim 16 wherein multiple inserts are imbedded in at least one tooth.
Claim 22
Dependent Claim
17 words
The cutter of claim 20 wherein the inserts have exposed cutting edges protruding from the consolidated metal.
Claim 23
Dependent Claim
16 words
The cutter of claim 20 wherein said powdered metal is applied to sides of the inserts.
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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) | 1989-12-22 | 1990-06-23 | 1990-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-22 | 1994-06-23 | 1994-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-22 | 1998-06-23 | 1998-12-23 | $7700.00 | Window Closed / Lapsed |