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. 02, 2002
Filed:
Mar. 09, 2000
Applicant:
Inventors:
Edward Harrigan, Richmond, TX (US);
Robert W. Sundquist, The Woodlands, TX (US);
Bunker M. Hill, Sugar Land, TX (US);
Dean W. Lauppe, Pasadena, TX (US);
Gary W. Contreras, Missouri City, TX (US);
Sony Tran, Missouri City, TX (US);
Assignee:
Schlumberger Technology Corporation, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 2/508 ;
U.S. Cl.
CPC ...
E21B 2/508 ;
Abstract
The present invention provides a brush bit for cutting a core sample from an unconsolidated formation with reduced fragmentation or damage to the core sample by using a plurality of stiff bristles to cut rock from around the core sample. The present invention also provides an improved method of obtaining a core sample from an unconsolidated formation.