Boring or penetrating the earth – With tool shaft detail – Shaft carried guide or protector
Patent
1996-11-27
1998-11-10
Neuder, William P.
Boring or penetrating the earth
With tool shaft detail
Shaft carried guide or protector
1662416, E21B 1700
Patent
active
058330194
ABSTRACT:
A casing/drillpipe protector is disclosed that has a composite structure made up of two separate parts. Both parts have cages to secure skeleton functions. The inner part is nested within the outer part such that the open ends of both cages form loops which can be aligned for insertion of a pin to secure the protector to the pipe. The cage of the inner part is smaller but stronger than the cage of the outer part and provides the significant portion of the hoop stress, and therefore radial force of the protector which is used to retain it to the drillpipe.
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Neuder William P.
Pegasus International Inc.
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