Jet bit with variable orifice nozzle
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
May 8, 2001
Grant Date -
N/A
app pub date -
Mar 10, 1999
filing date -
Mar 10, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A nozzle for a drill bit has an adjustable orifice, allowing a single nozzle to change the pressure drop for a given flow rate. This is accomplished by the use of two plates, each having a shaped aperture therein. The degree to which the two apertures are overlapped determines the size of the orifice. The movement of the apertures, and thus the size of the orifice, can be adjusted at the drilling site.
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