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. 14, 2015
Filed:
Jun. 03, 2010
Applicant:
Adil Mahallab AL Busaidy, Seeb, OM;
Inventor:
Adil Mahallab Al Busaidy, Seeb, OM;
Assignee:
Schlumberger Technology Corporation, Sugar Land, TX (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
E21B 43/119 (2006.01); E21B 43/116 (2006.01); E21B 43/114 (2006.01); E21B 43/117 (2006.01);
U.S. Cl.
CPC ...
E21B 43/114 (2013.01); E21B 43/117 (2013.01);
Abstract
According to a preferred embodiment, a dynamic underbalance device has a longitudinally extending tool string including an underbalance part. A first overbalance part is above the underbalance part and a second overbalance part below the underbalance part. Upon application of underbalance from the underbalance part and overbalance from the overbalance part, the overbalance and underbalance interact to isolate the underbalance.