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:
Mar. 07, 2006
Filed:
Nov. 20, 2003
Applicants:
Nolan C. Lerche, Stafford, TX (US);
James E. Brooks, Manvel, TX (US);
Choon Fei Wong, Pearland, TX (US);
Inventors:
Nolan C. Lerche, Stafford, TX (US);
James E. Brooks, Manvel, TX (US);
Choon Fei Wong, Pearland, TX (US);
Assignee:
Schlumberger Technology Corporation, Sugar Land, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
E21B 43/11 (2006.01);
U.S. Cl.
CPC ...
Abstract
An isolation apparatus is provided between an electrical conductor and an electrically-activated well tool. The isolation apparatus has a blocking element to enable a signal having a first electrical polarity to pass through the element. The blocking element blocks a signal having a second electrical polarity.