The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 27, 1984
Filed:
Aug. 27, 1982
Gerald S Gau, Houston, TX (US);
Vladimir Vaynshteyn, Houston, TX (US);
Halliburton Company, Duncan, OK (US);
Abstract
An improved rotational viscometer for testing drilling muds is disclosed. In a preferred and illustrated embodiment, a rotatable tubular sleeve is driven by a pulsed stepper motor. The drilling mud couples to a bob of cylindrical shape supported on a shaft. The sleeve is rotated or torqued, applying rotation to the shaft which is monitored by an optical encoder. The stepper motor is driven for a programmable sequence of specific intervals at specific speeds, and the mud coupled rotation at the encoder shaft is observed. The data obtained is scaled to provide an indication of viscosity and other measurements of the drilling mud indicated by an output LED display or other display type as desired. The mud is tested by a specified sequence of test procedures sanctioned by the American Petroleum Institute.