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:
Aug. 01, 1989
Filed:
Jan. 23, 1989
James A Wingrave, Chadds Ford, PA (US);
E. I. Du Pont De Nemours and Company, Wilmington, DE (US);
Abstract
A method and apparatus for determining the physical integrity of geological shales and for simulating the environment experienced by geological strata comprising forming a test specimen of the stratum to be measured; immersing the specimen in a drilling fluid, or a mixture of drilling fluids, for a predetermined length of time; spinning the test specimen while immersed up to a predetermined speed while adjusting the temperature of the fluid; and then physically measuring the specimen for disintegration, liquid absorption, and hardness. The apparatus for simulating the environment experienced by geological strata includes means for immersing the specimen in the drilling fluid which comprises a nail having the specimen attached to the shank adjacent the head to hold the specimen inverted below the surface of the drilling fluid.