Drill bit

United States of America Patent

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Feb 15, 1983
Grant Date
N/A
app pub date
Mar 10, 1980
filing date
Mar 16, 1979

priority date (Note)
Expired

status (Latency Note)

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Abstract

A rotary boring bit for boreholes comprises a body provided on its outer periphery with cutting members (6) consisting of a cutting portion (8) and a supporting portion (7), each cutting member being formed as a segment of a sintered body (1) having a core (3) of cutting material encased by a shell (2).

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Patent Owner(s)

Patent Owner	Address
EASTMAN CHRISTENSEN COMPANY	1937 SOUTH 300 WEST SALT LAKE CITY UTAH 84115

International Classification(s)

E21B:EARTH OR ROCK DRILLING

[Classification Symbol]

[Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Jurgens, Rainer	Celle, DE	30	1215
Phaal, Cornelius	Rivonia, ZA	18	1055

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Drill bit

Number of patents in Portfolio can not be more than 2000

United States of America Patent

06128998

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US Family Size	Non-US Coverage
Patent Longevity Expired	Forward Citations

PATENT NO	4373593
SERIAL NO	06128998
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06128998

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Abstract

First Claim

Family

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