Degradation assembly
AssigneeSchlumberger Technology Corporation
InventorsDavid R. Hall, Ronald Crockett, Jeff Jepson
Life of this patent
Estimating the term…
Abstract
A degradation assembly comprises a rotating portion and a fixed portion. The rotating portion comprises a wear resistant tip bonded to a carbide bolster. The bolster is attached to a shaft adapted for a rotatable connection within a bore of the fixed portion. The fixed portion is adapted for a rigid connection to a driving mechanism. The fixed portion includes an O-ring slot formed within its bore and with an O-ring being disposed therein. The O-ring is at least 15 percent compressed such that the O-ring resists rotation of the shaft.
Claims30
A degradation assembly comprising:
- a rotating portion including:
- a carbide bolster having a base end and a working end;
- a wear resistant tip bonded to the working end;
- and
- a shaft having a first end and a second end spaced away from the first end, the first end being attached to the base end;
- a fixed portion adapted for rigid connection to a driving mechanism, the fixed portion having a bore formed therein, the bore being sized and shaped to receive the shaft of the rotating portion, the bore having an O-ring slot formed therein;
- and
- an O-ring located within the O-ring slot and contacting the shaft, the O-ring being at least 15 percent compressed by the shaft such that the O-ring substantially resists rotation of the shaft relative to the bore.
A degradation assembly for use with a driving mechanism, said degradation assembly comprising:
- a first portion including:
- a carbide bolster having a base end and a working end,
- a wear resistant tip bonded to said working end, and
- a shaft having a first end and a second end spaced apart from said first end, said first end being attached to said base end, said second end having an outside surface;
- a second portion connectable to a driving mechanism, said second portion having a bore formed therein, and said bore being sized and shaped to receive said shaft of said first portion, said bore having an inside surface;
- an O-ring groove, said O-ring groove being formed within one of said outside surface of said shaft and said inside surface of said bore;
- and
- an O-ring, said O-ring being located within said O-ring groove, said O-ring being adapted to contact the other of said outside surface of said shaft and said inside surface of said bore, and said O-ring being adapted to impede rotation of said shaft and said bore relative to each other.
A degradation assembly for use with a driving mechanism, said degradation assembly comprising:
- a carbide bolster having a base end and a working end;
- a wear resistant tip bonded to said working end;
- a shaft having a first end and a second end spaced from said first end, said first end being attached to said base end;
- a support portion connectable to a driving mechanism, said support portion having a bore formed therein, said bore being sized and shaped to receive said shaft and to support said shaft in rotatable connection with said support portion;
- an O-ring groove, said O-ring groove being formed within one of an outside surface of said shaft and an inside surface of said bore;
- and
- an O-ring, said O-ring being located within said O-ring groove, said O-ring being adapted to contact the other of said outside surface of said shaft and said inside surface of said bore, and said O-ring being at least 15 percent compressed to impede rotation of said shaft and said bore relative to each other.
Dependencies are inferred from the claim text.