Apparatus for detecting drill bit wear
Patent
·
OSTI ID:6436731
This patent describes a rotary cone drill bit, comprising: a main bit body, the main bit body defining a central chamber; at least one port in eth main bit body establishing a fluid pathway between the central chamber and the exterior of the main bit body; at least one spindle secured to the main bit body; a rotatable cone on the spindle; a tensioned linkage extending through the spindle and the main bit body, the tensioned linkage having first and second ends; a tensioned linkage termination element secured to the tensioned linkage first end, the termination element being supported by the spindle; means for twisting the termination element in response to the cone rotating with a predetermined degree of eccentricity, the termination element and tensioned linkage being adapted to part from one another in response to twisting of the termination element; and means for altering the fluid flow resistance of the at least one port in response to a decrease in the tension of the tensioned linkage.
- Assignee:
- Exxon Production Research Co., Houston, TX
- Patent Number(s):
- US 4785894
- OSTI ID:
- 6436731
- Country of Publication:
- United States
- Language:
- English
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