Measuring and testing – Liquid analysis or analysis of the suspension of solids in a... – Viscosity
Reexamination Certificate
2005-04-05
2005-04-05
Larkin, Daniel S. (Department: 2856)
Measuring and testing
Liquid analysis or analysis of the suspension of solids in a...
Viscosity
C073S054310, C073S054380
Reexamination Certificate
active
06874353
ABSTRACT:
A conventional Couette viscometer is transformed to measure yield point, also known as yield stress, and other rheology of various fluids, including ones with particulates. A rotating viscometer includes a driven portion, a responsive body, a standard spring, and a plurality of fins. The fins have predetermined shapes such that the rotating viscometer and the standard spring, connected to the responsive body having at least a portion of the fins, are sensitive to detect yield stress of a test fluid composition in response to a selected rotation imparted to the driven portion. A method of measuring yield stress includes operating a standard rotating viscometer modified with a plurality of intermeshing fins such that a standard spring of the standard rotating viscometer responds to a torque that is related to yield stress and that is imposed by a stressed test material on a portion of the fins connected to the spring.
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Johnson Johnny W.
Morgan Ronnie G.
Gilbert, III E. Harrison
Halliburton Energy Service,s Inc.
Larkin Daniel S.
Wustenberg John W.
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