Patent US2465451A successfully refreshed from Google Patents.
Patent US4334586A successfully refreshed from Google Patents.
US4334586A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inserts for drilling bits
Assignee: Reed Rock Bit Co
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Filing: 1980-06-05
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Granted: 1982-06-15
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Expires: 2000-06-05
Abstract
Abstract Inserted hard metal cutting elements are disclosed which are advantageous for inserting into the cutters of drilling bits used in drilling underground formations. The inserted cutting elements comprise asymmetrical inserts placed in at least one row of a cutter in alternating alignment circumferentially therearound.
Inventors
- 👤 Percy W. Schumacher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:52
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; E21B10/50; E21B10/52; E21B10/08; E21B10/16; E21B10/56
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
134 words
In a rolling cutter drill bit of the type having a central body, an upper threaded pin end, a plurality of downwardly extending legs on said body, each said leg having a bearing journal protruding therefrom, and a generally frusto-conical cutter rotatably mounted on each said bearing journal, at least one of said cutters having a gage row and at least one nongage row of hard metal cutting elements inserted therein and protruding therefrom, the improvement comprising: a majority of said cutting elements in at least one of said rows comprises asymmetrical elements having a generally cylindrical base portion and an asymmetrical protruding portion; and, wherein said asymmetrical portions of at least two of said elements in said one row are arranged at different angular orientations in relation to a circumference of said cutter.
Claim 2
Dependent Claim
134 words
In a rolling cutter drill bit of the type having a central body, an upper threaded pin end, a plurality of downwardly extending legs on said body, each said leg having a bearing journal protruding therefrom, and a generally frusto-conical cutter rotatably mounted on each said bearing journal, at least one of said cutters having a gage row and at least one nongage row of hard metal cutting elements inserted therein and protruding therefrom, the improvement comprising: a majority of said cutting elements in at least one of said rows comprises asymmetrical elements having a generally cylindrical base portion and an asymmetrical protruding portion; and, wherein said asymmetrical portions of at least two of said elements in said one row are arranged at different angular orientations in relation to a circumference of said cutter.
Claim 3
Dependent Claim
72 words
The rolling cutter drill bit of claim 1 wherein said legs are three in number and said cutters each have a gage row and at least one non-gage row of inserted hard metal cutting elements, and wherein at least one of said rows on each said cutter comprises inserts, at least half of which have asymmetrical protruding portions arranged in angularly displaced staggered relationship with respect to a circumference of said cutters.
Claim 4
Dependent Claim
38 words
The rolling cutter drill bit of claim 1 or claim 2 wherein the angular displacement of the asymmetrical portion of said adjacent inserts ranges between 15 degrees and 180 degrees with respect to the circumference of said cutter.
Claim 5
Dependent Claim
29 words
The rolling cutter drill bit of claim 1 or claim 2 wherein the protruding portions of said asymmetrical inserts each comprises a generally frusto-conical section with a rounded end.
Claim 6
Dependent Claim
26 words
The rolling cutter drill bit of claim 1 or claim 2 wherein said asymmetrical protruding portion comprises a generally pyramidal section with a rounded elongated top.
Claim 7
Dependent Claim
90 words
A rolling cutter drill bit of the type having a body, three downwardly projecting legs attached to said body and having inwardly projecting bearing journals thereon, a generally conical cutter rotatably mounted on each of said journals by bearing means, and inserted hard metal cutting elements arranged in substantially circumferential rows on said cutters, the improvement comprising: said cutting elements in at least one of said rows on each said cutter having asymmetrical protruding portions which are arranged in alternating angular displacements with respect to the circumference of said cutters.
Claim 8
Dependent Claim
90 words
A rolling cutter drill bit of the type having a body, three downwardly projecting legs attached to said body and having inwardly projecting bearing journals thereon, a generally conical cutter rotatably mounted on each of said journals by bearing means, and inserted hard metal cutting elements arranged in substantially circumferential rows on said cutters, the improvement comprising: said cutting elements in at least one of said rows on each said cutter having asymmetrical protruding portions which are arranged in alternating angular displacements with respect to the circumference of said cutters.
Claim 9
Dependent Claim
27 words
The rolling cutter drill bit of claim 6 wherein said cutters each have asymmetrically shaped hard metal inserts in staggered arrangement in at least one non-gage row.
Claim 10
Dependent Claim
81 words
In a cutter of the type used for penetrating underground formations wherein said cutter has a generally frusto-conical body rotatably mounted on a shaft, and protruding hard metal cutting elements inserted thereon arranged in generally circumferential rows, the improvement comprising: at least two of said inserts in at least one of said rows each having a generally cylindrical base portion and an asymmetrical protruding portion, the protruding portions of said inserts having angular orientations different from each other in said row.
Claim 11
Dependent Claim
81 words
In a cutter of the type used for penetrating underground formations wherein said cutter has a generally frusto-conical body rotatably mounted on a shaft, and protruding hard metal cutting elements inserted thereon arranged in generally circumferential rows, the improvement comprising: at least two of said inserts in at least one of said rows each having a generally cylindrical base portion and an asymmetrical protruding portion, the protruding portions of said inserts having angular orientations different from each other in said row.
Claim 12
Dependent Claim
73 words
A hard metal insert for use as a cutting element in rock cutting and drilling apparatus said insert comprising: a generally cylindrical base section having a central longitudinal axis; and, a frusto-conical protruding section having a rounded top end, said protruding section consisting of a non-right-circular cone having a central axis non-aligned with the central axis of said base section, and said top end being radially displaced from said base section central axis.
Claim 13
Dependent Claim
73 words
A hard metal insert for use as a cutting element in rock cutting and drilling apparatus said insert comprising: a generally cylindrical base section having a central longitudinal axis; and, a frusto-conical protruding section having a rounded top end, said protruding section consisting of a non-right-circular cone having a central axis non-aligned with the central axis of said base section, and said top end being radially displaced from said base section central axis.
Claim 14
Dependent Claim
68 words
A hard metal insert for use as a cutting element in rock cutting and drilling apparatus, said insert comprising: a generally cylindrical base portion having a central longitudinal axis; and, a non-regular pyramidal protruding section having an elongated rounded crest, said protruding section having a central axis non-aligned with respect to said base portion central axis, and a top portion radially displaced from said base portion central axis.
Claim 15
Dependent Claim
68 words
A hard metal insert for use as a cutting element in rock cutting and drilling apparatus, said insert comprising: a generally cylindrical base portion having a central longitudinal axis; and, a non-regular pyramidal protruding section having an elongated rounded crest, said protruding section having a central axis non-aligned with respect to said base portion central axis, and a top portion radially displaced from said base portion central axis.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-06-14 | 1985-12-14 | 1986-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-14 | 1989-12-14 | 1990-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-14 | 1993-12-14 | 1994-06-15 | $7700.00 | Window Closed / Lapsed |