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:
Apr. 24, 2001
Filed:
Jul. 16, 1998
Applicant:
Inventors:
Mark Carmichael, Aboyne, GB;
Paul Howlett, Cults, GB;
Assignee:
Specialised Petroleum Services Ltd., Westhill Aberdeenshire, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 3/410 ;
U.S. Cl.
CPC ...
E21B 3/410 ;
Abstract
A downhole tool having selectively openable ports therein, the tool being actuable between a closed configuration in which the ports are closed, a primed configuration in which the ports are primed for opening, and an open configuration in which the ports are opened.