US4535853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill bit for jet assisted rotary drilling
Assignee: COCENTALL-ATELIERS DE CARSPACH
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Filing: 1983-12-23
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Granted: 1985-08-20
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Expires: 2003-12-23
Abstract
Abstract The invention relates to the geometry of drill bits for jet assisted rotary drilling. According to the invention there is used a drill bit comprising platelets of small radial dimension disposed about a central burster in a discontinuous peripheral crown axially extending said drill bit, channels for supplying pressurized fluid opening from the crown close to the platelets. Said platelets are preferably separated from one another by rectilinear discharge ramps. A drill bit in accordance with this invention can be manufactured e.g. by turning or milling. It can be applied for drilling rock formations in mines, and other hard materials.
Inventors
- 👤 Serge Ippolito
- 👤 Georges A. Cagnioncle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:35
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; E21B10/58; E21B10/02; E21B10/04; E21B10/54; E21B10/60; E21B10/602
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
108 words
A rock drill bit for very high pressure jet assisted rotary drilling to be mounted to the end of a rotational drive rod for rotation around a rotational axis, comprising a body, a discontinuous peripheral crown axially extending from said body opposite to said rod, a central burster within said crown, at least two drilling plates inserted in said crown, having a small radial dimension and formed with working edges radially and axially projecting from said crown, said drilling plates being circumferentially separated by debris discharge ramps provided across said crown, and very high pressure fluid supply channels crossing through said crown and opening close to said plates.
Claim 2
Dependent Claim
108 words
A rock drill bit for very high pressure jet assisted rotary drilling to be mounted to the end of a rotational drive rod for rotation around a rotational axis, comprising a body, a discontinuous peripheral crown axially extending from said body opposite to said rod, a central burster within said crown, at least two drilling plates inserted in said crown, having a small radial dimension and formed with working edges radially and axially projecting from said crown, said drilling plates being circumferentially separated by debris discharge ramps provided across said crown, and very high pressure fluid supply channels crossing through said crown and opening close to said plates.
Claim 3
Dependent Claim
16 words
A drill bit according to claim 1, wherein said discharge ramps are limited by rectilinear faces.
Claim 4
Dependent Claim
18 words
A drill bit according to claim 1, which has an axial symmetry with respect to said rotational axis.
Claim 5
Dependent Claim
14 words
A drill bit according to claim 1, wherein said central burster is a cone.
Claim 6
Dependent Claim
18 words
A drill bit according to claim 4, wherein said cone is inclined with respect to said rotational axis.
Claim 7
Dependent Claim
15 words
A drill bit according to claim 5, wherein said cone is attached to said body.
Claim 8
Dependent Claim
21 words
A drill bit according to claim 1, wherein said central burster is constituted by a very high pressure fluid supply channel.
Claim 9
Dependent Claim
23 words
A drill bit according to claim 7, wherein all very high pressure fluid supply channels are supplied from a same source of pressure.
Claim 10
Dependent Claim
16 words
A drill bit according to claim 1, wherein said inserts are formed with a drilling wedge.
Claim 11
Dependent Claim
33 words
A drill bit according to claim 1, wherein said very high pressure fluid supply channels open forwardly of the inserts through shoulders extending up towards the material to be drilled along said inserts.
Claim 12
Dependent Claim
132 words
A rock drill bit for very high pressure jet assisted rotary drilling to be mounted to the end of a rotational drive rod for rotation around a rotational axis, comprising a body, a discontinuous peripheral crown axially extending from said body opposite to said rod, a central burster within said crown, at least two drilling plates inserted in said crown, having a small radial dimension and formed with working edges radially and axially projecting from said crown, said drilling plates being circumferentially separated by debris discharge ramps provided across said crown, and very high pressure fluid supply channels crossing through said crown and opening close to said plates, said discharge ramps being limited by rectilinear faces and said central burster being a cone which is inclined with respect to said rotational axis.
Claim 13
Dependent Claim
132 words
A rock drill bit for very high pressure jet assisted rotary drilling to be mounted to the end of a rotational drive rod for rotation around a rotational axis, comprising a body, a discontinuous peripheral crown axially extending from said body opposite to said rod, a central burster within said crown, at least two drilling plates inserted in said crown, having a small radial dimension and formed with working edges radially and axially projecting from said crown, said drilling plates being circumferentially separated by debris discharge ramps provided across said crown, and very high pressure fluid supply channels crossing through said crown and opening close to said plates, said discharge ramps being limited by rectilinear faces and said central burster being a cone which is inclined with respect to said rotational axis.
Claim 14
Dependent Claim
19 words
The drill bit of claim 11, wherein said drill bit has axial symmetry with respect to said rotational axis.
Claim 15
Dependent Claim
14 words
The drill bit of claim 12, wherein said cone is attached to said body.
Claim 16
Dependent Claim
22 words
The drill bit of claim 13, wherein all very high pressure fluid supply channels are supplied from a common source of pressure.
Claim 17
Dependent Claim
15 words
The drill bit of claim 14, wherein said plates are formed with a drilling wedge.
Claim 18
Dependent Claim
33 words
The drill bit of claim 15, wherein said very high pressure fluid supply channels open forwardly of the plates through the shoulders extending upwardly towards the material to be drilled along said plates.
Claim 19
Dependent Claim
142 words
A rock drill bit for very high pressure jet assisted rotary drilling to be mounted to the end of a rotational drive rod for rotation around a rotational axis, comprising a body, a discontinuous peripheral crown axially extending from said body opposite to said rod, a central burster within said crown, at least two drilling plates inserted in said crown, having a small radial dimension and formed with working edges radially and axially projecting from said crown, said drilling plates being circumferentially separated by debris discharge ramps provided across said crown, and very high pressure fluid supply channels crossing through said crown and opening close to said plates, said plates being formed with a drilling wedge and said very high pressure fluid supply channels open forwardly of said plates through shoulder extending up towards the material to be drilled along said plates.
Claim 20
Dependent Claim
142 words
A rock drill bit for very high pressure jet assisted rotary drilling to be mounted to the end of a rotational drive rod for rotation around a rotational axis, comprising a body, a discontinuous peripheral crown axially extending from said body opposite to said rod, a central burster within said crown, at least two drilling plates inserted in said crown, having a small radial dimension and formed with working edges radially and axially projecting from said crown, said drilling plates being circumferentially separated by debris discharge ramps provided across said crown, and very high pressure fluid supply channels crossing through said crown and opening close to said plates, said plates being formed with a drilling wedge and said very high pressure fluid supply channels open forwardly of said plates through shoulder extending up towards the material to be drilled along said plates.
Claim 21
Dependent Claim
16 words
The drill bit of claim 17 wherein said drill discharge ramps are limited by rectangular faces.
Claim 22
Dependent Claim
23 words
The drill bit of claim 18 wherein said central burster is a cone, said cone being inclined with respect to said rotational axis.
Claim 23
Dependent Claim
18 words
The drill bit of claim 19 wherein said central burster comprises a very high pressure fluid supply channel.
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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) | 1988-08-19 | 1989-02-18 | 1989-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-19 | 1993-02-18 | 1993-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-19 | 1997-02-18 | 1997-08-20 | $7700.00 | Window Closed / Lapsed |