US4717290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Milling tool
Assignee: WEATHERFORD U S Inc
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Filing: 1986-12-17
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Granted: 1988-01-05
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Expires: 2006-12-17
Abstract
Abstract This miling tool for underground work consists of a tool body which has a plurality of cutter blades. Each cutter blade has a negative axial rake and an essentially constant negative radial rake. In addition, each cutter arm has a close packing of cylindrical cutting grade tungsten carbide inserts set at a lead angle of about 0 to 10 degrees. The inserts are also preferably vertically offset on adjacent cutting blades.
Inventors
- 👤 Carl D. Reynolds
- 👤 Thurman B. Carter, Jr.
- 👤 Shane P. Hart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:19
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; E21B10/56; E21B29/00; E21B29/002; Y; Y10; Y10T; Y10T407/00; Y10T407/19; Y10T407/1906; Y10T407/1908; Y10T407/1952; Y10T407/1956; Y10T407/1958
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
72 words
A milling tool to remove material from an underground location comprising a cylindrical tool body, a longitudinal passage through said tool body, means at one end for connection to a drive means, and a plurality of cutter blades having cutting inserts thereon attached to the surface of said tool body, said cutter blades having a negative axial rake of about 1 to about 10 degrees and a substantially constant negative radial rake.
Claim 2
Dependent Claim
72 words
A milling tool to remove material from an underground location comprising a cylindrical tool body, a longitudinal passage through said tool body, means at one end for connection to a drive means, and a plurality of cutter blades having cutting inserts thereon attached to the surface of said tool body, said cutter blades having a negative axial rake of about 1 to about 10 degrees and a substantially constant negative radial rake.
Claim 3
Dependent Claim
28 words
A milling tool to remove material from an underground location as in claim 1 wherein the cutting blades are in a spiral form on said cylindrical tool body.
Claim 4
Dependent Claim
33 words
A milling tool to remove material from an underground location as in claim 2 wherein the cutting inserts on said cutter blades have a lead angle of about 0 to about 10 degrees.
Claim 5
Dependent Claim
31 words
A cutting tool to remove material from an underground location as in claim 2 wherein the substantially constant negative radial rake is an angle of about 0 to about 30 degrees.
Claim 6
Dependent Claim
30 words
A milling tool to remove material from an underground location as in claim 2 wherein the leading surface of each cutter blade has thereon a plurality of cylindrical cutting inserts.
Claim 7
Dependent Claim
37 words
A milling tool to remove material from an underground location as in claim 5 wherein said cylindrical cutting inserts have a thickness of at least about 0.125 inches and a diameter of at least about 0.25 inches.
Claim 8
Dependent Claim
33 words
A milling tool to remove material from an underground location as in claim 6 wherein said cylindrical cutting inserts have a thickness of about 0.210 inches and a diameter of about 0.375 inches.
Claim 9
Dependent Claim
24 words
A milling tool to remove material from an underground location as in claim 7 wherein the cylindrical inserts are cutting grade tungsten carbide inserts.
Claim 10
Dependent Claim
29 words
A milling tool to remove material from an underground location as in claim 1 wherein the leading surface of each cutting blade has a plurality of cylindrical cutting inserts.
Claim 11
Dependent Claim
36 words
A milling tool to remove material from an underground location as in claim 9 wherein said cylindrical cutting inserts have a thickness of at least about 0.125 and a diameter of at least about 0.25 inches.
Claim 12
Dependent Claim
33 words
A milling tool to remove material from an underground location as in claim 10 wherein said cylindrical cutting inserts have a thickness of about 0.210 inches and a diameter of about 0.375 inches.
Claim 13
Dependent Claim
33 words
A milling tool to remove material from an underground location as in claim 1 wherein the cutting inserts on said cutter blades have a lead angle of about 0 to about 10 degrees.
Claim 14
Dependent Claim
31 words
A milling tool to remove material from an underground location as in claim 1 wherein the substantially constant negative radial rake is an angle of about 0 to about 30 degrees.
Claim 15
Dependent Claim
28 words
A milling tool to remove material from an underground location as in claim 1 wherein the cutter blades are in a linear form on said cylindrical tool body.
Claim 16
Dependent Claim
29 words
A milling tool to remove material from an underground location as in claim 14 wherein said cutter blades have a lead angle of about 0 to about 10 degrees.
Claim 17
Dependent Claim
30 words
A milling tool to remove material from an underground location as in claim 14 wherein the negative radial rake of the cutter blade is about 0 to about 30 degrees.
Claim 18
Dependent Claim
30 words
A milling tool to remove material from an underground location as in claim 14 wherein the leading surface of each cutter blade has thereon a plurality of cylindrical cutting inserts.
Claim 19
Dependent Claim
36 words
A milling tool to remove material from an underground location as in claim 17 wherein said cylindrical inserts have a thickness of at least about 0.125 inch and a diameter of at least about 0.25; inch.
Claim 20
Dependent Claim
33 words
A milling tool to remove material from an underground location as in claim 18 wherein said cylindrical cutting inserts have a thickness of about 0.210 inch and a diameter of about 0.375 inch.
Claim 21
Dependent Claim
42 words
A milling tool to remove material from an underground location as in claim 1 wherein the cutting inserts are arranged on adjacent cutting blades to be about 0.0625 inch to about 0.25 inch offset from a latitudinal plane through said tool body.
Claim 22
Dependent Claim
22 words
A milling tool to remove material from an underground location as in claim 20 wherein the cutting inserts are cylindrical cutting inserts.
Claim 23
Dependent Claim
37 words
A milling tool to remove material from an underground location as in claim 21 wherein said cylindrical cutting inserts have a thickness of at least about 0.125 inch and a diameter of at least about 0.25 inch.
Claim 24
Dependent Claim
37 words
A milling tool to remove material from an underground location as in claim 22 wherein said cylindrical cutting inserts have a thickness of at least about 0.210 inch and a diameter of at least about 0.375 inch.
Claim 25
Dependent Claim
27 words
A milling tool to remove material from an underground location as in claim 20 wherein said cutter blades are in a spiral form on said tool body.
Claim 26
Dependent Claim
33 words
A milling tool to remove material from an underground location as in claim 24 wherein said cutting inserts on said cutter blades have a lead angle of about 0 to about 10 degrees.
Claim 27
Dependent Claim
31 words
A milling tool to remove material from an underground location as in claim 24 wherein the substantially constant negative radial rake is an angle of about 0 to about 30 degrees.
Claim 28
Dependent Claim
27 words
A milling tool to remove material from an underground location as in claim 20 wherein said cutter blades are in a linear form on said tool body.
Claim 29
Dependent Claim
33 words
A milling tool to remove material from an underground location as in claim 27 wherein said cutting inserts on said cutter blades have a lead angle of about 0 to about 10 degrees.
Claim 30
Dependent Claim
25 words
A milling tool to remove material from an underground location as in claim 1 wherein said cutter blades are fixedly attached to said tool body.
Claim 31
Dependent Claim
28 words
A milling tool to remove material from an underground location as in claim 29 wherein said cutter blades are in a spiral form on said cylindrical tool body.
Claim 32
Dependent Claim
33 words
A milling tool to remove material from an underground location as in claim 30 wherein the cutting inserts on said cutter blades have a lead angle of about 0 to about 10 degrees.
Claim 33
Dependent Claim
31 words
A milling tool to remove material from an underground location as in claim 30 wherein the substantially constant negative radial rake is an angle of about 0 to about 30 degrees.
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) | 1991-01-04 | 1991-07-06 | 1992-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-04 | 1995-07-06 | 1996-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-04 | 1999-07-06 | 2000-01-05 | $7700.00 | Window Closed / Lapsed |