Boring or penetrating the earth – Bit or bit element – Specific or diverse material
Patent
1996-08-09
1998-05-26
Bagnell, David J.
Boring or penetrating the earth
Bit or bit element
Specific or diverse material
E21B 1052
Patent
active
057553017
ABSTRACT:
An improved insert for use in a drilling device. The insert adapted to be mounted on the drilling device within a socket formed in the drilling device. The insert has a convex curved lead-in surface formed on the lower portion of the insert. The lead-in surface operates to enhance the retention of the insert within the socket during drilling operations.
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Security, Security Double Seal Bits, undated, 5 pages.
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Campos, Jr. Harry Morales
Love Raymond Joseph
Bagnell David J.
Dresser Industries Inc.
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