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:
Nov. 17, 2015
Filed:
Jun. 24, 2011
Applicants:
Ove Hole, Hafrsfjord, NO;
Harald Syse, Roeyneberg, NO;
Inventors:
Ove Hole, Hafrsfjord, NO;
Harald Syse, Roeyneberg, NO;
Assignee:
REELWELL AS, , NO;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 21/12 (2006.01); E21B 21/08 (2006.01); E21B 17/18 (2006.01);
U.S. Cl.
CPC ...
E21B 21/12 (2013.01); E21B 17/18 (2013.01); E21B 21/08 (2013.01);
Abstract
A method to be used when performing drilling in a well bore involves positioning a dual bore drill pipe in a well bore. An outer annulus formed between the drill pipe and well bore wall is divided into two different sections. A first fluid is provided in one of the sections. A second fluid having a density less than the first fluid is circulated into and out of the well bore through the drill pipe. The densities of the first and second fluids are such that the drill pipe is at least partly floating in the first fluid in the outer annulus.