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:
Jan. 02, 1990
Filed:
Mar. 08, 1989
Applicant:
Inventor:
Edward G Dew, Houston, TX (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ; E21B / ; E21B / ;
U.S. Cl.
CPC ...
166376 ; 175 61 ; 175 62 ;
Abstract
A chemically removable casing section is spotted in a casing string opposite a formation through which a horizontal borehole is to be drilled. The casing section is selectively dissolved by a chemical solution, and a horizontal borehole is drilled into the formation through the window in the casing string.