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. 22, 1997
Filed:
Jun. 20, 1995
Applicant:
Inventor:
Tommy J Yates, Coppell, TX (US);
Assignee:
Mobil Oil Corporation, Fairfax, VA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166285 ; 1662423 ;
Abstract
A method and apparatus for casing and cementing an interval of a well bore which provide for a good distribution of cement over the entire interval even when a restriction forms within the annulus before all of the cement has been placed. The casing is provided with an alternate flow path for delivering cement slurry which flows from the lower end of the casing to different levels within the well annulus so that if a restriction occurs in the annulus, cement slurry can still be delivered to the annulus above the restriction.