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:
Feb. 02, 2010
Filed:
May. 19, 2004
Applicants:
Hans Jørgen Lindland, Sandnes, NO;
Stein Følkner, Hosle, NO;
Inventors:
Hans Jørgen Lindland, Sandnes, NO;
Stein Følkner, Hosle, NO;
Assignee:
FMC Kongsberg Subsea AS, Kongsberg, NO;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 29/12 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention concerns a dual-type plug to be used in a wellhead. The plug has a separate retrievable inner plug (). Retrieving only the inner plug allows the use of lighter workover equipment than if the whole plug () must be pulled.