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Publication numberUSD405811 S
Publication typeGrant
Application numberUS 29/084,543
Publication dateFeb 16, 1999
Filing dateMar 5, 1998
Publication number084543, 29084543, US D405811 S, US D405811S, US-S-D405811, USD405811 S, USD405811S
InventorsRobert W. Arfele, George A. Espiritu, Ed R. Martin, Jr.
Original AssigneeDresser Industries, Inc.
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Seven blade drill bit
US D405811 S
Abstract  available in
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  1. The ornamental design for a seven blade drill bit, as shown and described.

FIG. 1 is a top plan view of a seven blade drill bit showing our new design;

FIG. 2 is a front perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a right side elevational view thereof; and,

FIG. 7 is a bottom plan perspective view thereof.

Non-Patent Citations
1Catalogue/Brochure page: "Diataq DS." Admitted prior art.
2Catalogue/Brochure page: "Hycalog Introduces the Hybrid-Fishtail." Hycalog. Admitted prior art.
3Catalogue/Brochure page: "Longer Bit Life and Superior Downhole Performance." Hycalog. Admitted Prior Art.
4Catalogue/Brochure page: "PD-7 Rotary and Motor Bit; PD-11 Rotary Bit; PD-11X2 Rotary Bit." Admitted prior art.
5Catalogue/Brochure page: "Put the Best on the Bottom." BiTech. Admitted prior art.
6Catalogue/Brochure page: "Smith Diamond's New S-95: The Right Direction in Soft Formations." Smith International. Admitted prior art.
7Catalogue/Brochure page: "Strata-Cut Drilling-Bits." Admitted prior art.
8Catalogue/Brochure page: "The Fast Track to the Bottom Line," p. 8. Strata Bit. Admitted prior art.
9Catalogue/Brochure pages: "A Strong Line of Natural Diamond and PDC Bits." Smith Diamond. Admitted prior art.
10Catalogue/Brochure pages: "Bit Description" Admitted prior art.
11Catalogue/Brochure pages: "Cut Drilling Costs 40 Percent or More with a Strata Bit PDC Bit Tailored to the Formation." Straat Bit. Admitted prior art.
12Catalogue/Brochure pages: "Diamond Compact Bits (R-Series)," pp. 11-12. Eastman Christensen. Admitted prior art.
13Catalogue/Brochure pages: "Diamond Compact Bits (R-Series)." Norton Christensen Drilling Products. Admitted prior art.
14Catalogue/Brochure pages: "Diamond Drill Bits." Cristal Profor. Tarbes, France. Admitted prior art.
15Catalogue/Brochure pages: "Diamond Products." Smith International, pp. 12-13. Admitted prior art.
16Catalogue/Brochure pages: "DP6 PDC Drill Bit." Admitted prior art.
17Catalogue/Brochure pages: "Drilling Bits." Petroleum Diamond Products. Admitted prior art.
18Catalogue/Brochure pages: "Nortrak Navigation Drilling Systems," pp. 4-5. Nortrak. Admitted prior art.
19Catalogue/Brochure pages: "Standard PDC Bits; Standard Ringcutter PDC Bits; Gold Series Bits." Admitted prior art.
20Catalogue/Brochure pages: "TD 2000 Series Drill Bits; TD Drill Bits; PD Steel Body Drill Bits." Diamond Boart Stratabit. Admitted prior art.
21Catalogue/Brochure pages: "Technical Data." Eastman Christensen. Admitted prior art.
22Catalogue/Brochure pages: "VIII. Diamond Drilling & Coring Bits," pp. 47-48. Eastman Christensen. Admitted prior art.
23Catalogue/Brochure pages: 63/4 in. DS42H, et al. Hycalog. Admitted prior art.
24Catalogue/Brochure pages: 81/2 in Hornet 4, et al. Reed Tool Company. Admitted prior art.
25Catalogue/Brochure pages: IADC S946, et al. Smith Diamond. Admitted prior art.
26Catalogue/Brochure pages: Rock Digger 15, et al. Admitted prior art.
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US6170576Feb 25, 1999Jan 9, 2001Weatherford/Lamb, Inc.Mills for wellbore operations
US7836979Oct 29, 2008Nov 23, 2010Baker Hughes IncorporatedDrill bits and tools for subterranean drilling
US8079430Apr 22, 2009Dec 20, 2011Baker Hughes IncorporatedDrill bits and tools for subterranean drilling, methods of manufacturing such drill bits and tools and methods of off-center drilling
U.S. ClassificationD15/139