Pressure Losses Inside Tool Joints Can Alter Drilling Hydraulics

[+] Author and Article Information
E. B. Denison

Shell Development Company, Houston, Tex.

J. Pressure Vessel Technol 100(2), 172-178 (May 01, 1978) (7 pages) doi:10.1115/1.3454448 History: Received June 24, 1977; Online October 25, 2010


Pressure losses associated with small-throated (internal upset) tool joints have been measured. Computations show that these losses may contribute significantly to the overall loss in a mud circulating system. This can limit the hydraulic horsepower available at the bit and/or the annular velocity in the borehole.

Copyright © 1978 by ASME
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