Core barrel assemblies with braking devices

Details Core barrel assemblies with braking devices Core barrel assemblies with braking devices

2011-04-26

2011-11-08

Thompson, Kenneth L (Department: 3672)

Boring or penetrating the earth

With means movable relative to tool to receive, retain, or...

Receiver removable through below-ground tool shaft

C175S249000

Reexamination Certificate

active

08051925

ABSTRACT:
A braking device for drilling operations in a borehole includes a brake retainer having a plurality of brake connector openings defined therein, a body member having a tapered surface having a first diameter and a second diameter, the second diameter being larger than the first diameter, at least one brake element positioned at least partially between the brake retainer and the body member and in communication with the tapered surface and at least one of the brake connector openings, and a bias member configured to exert a biasing force on the body member to move the body member toward the brake retainer to move the brake element from contact with the first diameter of the tapered surface toward contact with the second diameter.

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