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:
Jul. 10, 1984
Filed:
Dec. 30, 1982
Applicant:
Inventors:
Wilbur F Roper, DeSoto, TX (US);
Fletcher J Williams, Dallas, TX (US);
V Roy Slover, Irving, TX (US);
Assignee:
Mobil Oil Corporation, New York, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
73151 ;
Abstract
An improved instrument for measuring the relative 'stickiness' of a drilling mud under well drilling condition is disclosed. It features a filtration member comprised of the material of the formation within which the well is drilled. After formation of a filter cake on the surface of the stone filtration member, a plunger is juxtaposed to the stone filtration member and the amount of torque required to rotate the plunger with respect thereto after juxtaposition for a fixed period of time is measured, to provide a relative indication of the adhesion of the plunger to the stone.