US5355750A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rolling cone bit with improved wear resistant inserts
Assignee: Baker Hughes Holdings LLC
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Filing: 1993-11-29
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Granted: 1994-10-18
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Expires: 2013-11-29
Abstract
Abstract An improved earth-boring bit the rolling cone variety and an insert for use therein is provided. A superabrasive element is coated with at least one layer of metallic material. The superabrasive element then is placed in a receptacle cavity in a pre-formed hard metal jacket. The superabrasive element then is brazed or infiltrated to the hard metal jacket. Metallurgical and mechanical bonds between the superabrasive element, the at least one layer of metallic material on superabrasive element, the braze or infiltrant binder material, and the fracture-tough material of the hard metal jacket retain the superabrasive element in the cavity of the hard metal jacket. Improved earth-boring bits according to this embodiment of the present invention provide abrasion-resistant earth-boring bits of the rolling cutter variety. Such improved bits, and the inserts therefore, are formed without resort to high-temperature, high-pressure processes.
Inventors
- 👤 Danny E. Scott
- 👤 Redd H. Smith
- 👤 Gordon A. Tibbitts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:54
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; E21B10/56; E21B10/567; E21B10/5676; B; B22; B22F; B22F7/00; B22F7/06; E21B10/50; E21B10/52; E21B10/62; Y; Y10; Y10S; Y10S76/00; Y10S76/11; Y10S76/12
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
175 words
A method of forming a insert for use in an earth-boring bit having a body and at least one bearing shaft depending therefrom, at least one cutter cone mounted for rotation on the bearing shaft, the cutter cone having a plurality of sockets formed therein to receive the insert by interference fit, the method comprising the steps of: selecting at least one superabrasive element having desired wear-resistant properties and a maximum temperature of thermal stability; coating at least a portion of the superabrasive element with at least one layer of metallic material; forming a hard metal jacket of fracture-tough material; providing the hard metal jacket with an opening at a selected end thereof to define a receptacle cavity therein; and securing the superabrasive element in the receptacle cavity of the hard metal jacket by introducing a binder material therebetween, the step of securing serving to establish both mechanical and metallurgical bonds between the superabrasive element, the at least one layer of metallic material, the binder material, and the fracture-tough material of the hard metal jacket.
Claim 2
Independent Claim
175 words
A method of forming a insert for use in an earth-boring bit having a body and at least one bearing shaft depending therefrom, at least one cutter cone mounted for rotation on the bearing shaft, the cutter cone having a plurality of sockets formed therein to receive the insert by interference fit, the method comprising the steps of: selecting at least one superabrasive element having desired wear-resistant properties and a maximum temperature of thermal stability; coating at least a portion of the superabrasive element with at least one layer of metallic material; forming a hard metal jacket of fracture-tough material; providing the hard metal jacket with an opening at a selected end thereof to define a receptacle cavity therein; and securing the superabrasive element in the receptacle cavity of the hard metal jacket by introducing a binder material therebetween, the step of securing serving to establish both mechanical and metallurgical bonds between the superabrasive element, the at least one layer of metallic material, the binder material, and the fracture-tough material of the hard metal jacket.
Claim 3
Dependent Claim
84 words
The method according to claim 1, wherein the step of securing the superabrasive element in the receptacle cavity of the hard metal jacket further comprises the steps of: placing the coated superabrasive element in the receptacle cavity of the hard metal jacket; filling the receptacle cavity with particles of fracture-tough matrix material; and infiltrating the coated superabrasive element and the particles of fracture-tough matrix material with the binder material at a temperature less than the maximum temperature of thermal stability of the superabrasive element.
Claim 4
Dependent Claim
61 words
The method according to claim 1 wherein the step of securing the superabrasive element in the receptacle cavity further comprises the steps of: placing the coated superabrasive element in the receptacle cavity of the hard metal jacket; and brazing the superabrasive therein with a binder material at a temperature less than the maximum temperature of thermal stability of the superabrasive element.
Claim 5
Dependent Claim
34 words
The method according to claim 1 wherein the step of coating the superabrasive element further comprises the step of depositing an inner layer of metallic material on the superabrasive element by chemical vapor deposition.
Claim 6
Dependent Claim
34 words
The method according to claim 1 wherein the step of coating the superabrasive element further comprises the step of depositing a compliant layer of ductile metallic material on the superabrasive element by electroplate deposition.
Claim 7
Dependent Claim
34 words
The method according to claim 1 wherein the step of coating the superabrasive element further comprises the step of depositing an inner layer of metallic material on the superabrasive element by metal vapor deposition.
Claim 8
Dependent Claim
34 words
The method according to claim 1 wherein the step of coating the superabrasive element further comprises the step of depositing a compliant layer of ductile metallic material on the superabrasive element by electroless deposition.
Claim 9
Dependent Claim
34 words
The method according to claim 1 wherein the step of coating the superabrasive element further comprises the step of depositing an outer layer of metallic material on the superabrasive element by chemical vapor deposition.
Claim 10
Dependent Claim
34 words
The method according to claim 1 wherein the step of coating the superabrasive element further comprises the step of depositing an outer layer of metallic material on the superabrasive element by metal vapor deposition.
Claim 11
Independent Claim
184 words
A method of forming a insert for use in an earth-boring bit having a body, at least one bearing shaft depending downwardly and inwardly therefrom, and at least one cutter cone mounted for rotation on the bearing shaft, the cutter cone having a plurality of sockets formed therein to receive the gage insert by interference fit, the method comprising the steps of: selecting at least one superabrasive element having desired wear-resistant properties, and having a maximum temperature of thermal stability; coating the superabrasive element with at least one layer of metallic material; placing the coated superabrasive element in a mold; filling the mold with particles of fracture-tough matrix material; and infiltrating the coated superabrasive and the particles of fracture-tough matrix material with a binder material at a temperature less than the melting temperature of the at least one layer and less than the maximum temperature of thermal stability of the superabrasive element, the step of infiltrating serving to establish both mechanical and metallurgical bonds between the superabrasive element, the at least one layer of metallic material, the binder material, and the fracture-tough matrix material.
Claim 12
Independent Claim
184 words
A method of forming a insert for use in an earth-boring bit having a body, at least one bearing shaft depending downwardly and inwardly therefrom, and at least one cutter cone mounted for rotation on the bearing shaft, the cutter cone having a plurality of sockets formed therein to receive the gage insert by interference fit, the method comprising the steps of: selecting at least one superabrasive element having desired wear-resistant properties, and having a maximum temperature of thermal stability; coating the superabrasive element with at least one layer of metallic material; placing the coated superabrasive element in a mold; filling the mold with particles of fracture-tough matrix material; and infiltrating the coated superabrasive and the particles of fracture-tough matrix material with a binder material at a temperature less than the melting temperature of the at least one layer and less than the maximum temperature of thermal stability of the superabrasive element, the step of infiltrating serving to establish both mechanical and metallurgical bonds between the superabrasive element, the at least one layer of metallic material, the binder material, and the fracture-tough matrix material.
Claim 13
Dependent Claim
34 words
The method according to claim 9 wherein the step of coating the superabrasive element further comprises the step of depositing an inner layer of metallic material on the superabrasive element by chemical vapor deposition.
Claim 14
Dependent Claim
34 words
The method according to claim 9 wherein the step of coating the superabrasive element further comprises the step of depositing an inner layer of metallic material on the superabrasive element by metal vapor deposition.
Claim 15
Dependent Claim
34 words
The method according to claim 9 wherein the step of coating the superabrasive element further comprises the step of depositing a compliant layer of ductile metallic material on the superabrasive element by electroplate deposition.
Claim 16
Dependent Claim
34 words
The method according to claim 9 wherein the step of coating the superabrasive element further comprises the step of depositing a compliant layer of ductile metallic material on the superabrasive element by electroless deposition.
Claim 17
Dependent Claim
34 words
The method according to claim 9 wherein the step of coating the superabrasive element further comprises the step of depositing an outer layer of metallic material on the superabrasive element by chemical vapor deposition.
Claim 18
Dependent Claim
34 words
The method according to claim 9 wherein the step of coating the superabrasive element further comprises the step of depositing an outer layer of metallic material on the superabrasive element by metal vapor deposition.
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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) | 1997-10-17 | 1998-04-18 | 1998-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-17 | 2002-04-18 | 2002-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-17 | 2006-04-18 | 2006-10-18 | $7700.00 | Window Closed / Lapsed |