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:
Mar. 16, 1993
Filed:
Jan. 22, 1991
Applicant:
Inventor:
Neil H Akkerman, Houston, TX (US);
Assignee:
AVA International Corporation, Houston, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
E21B / ; E21B / ;
U.S. Cl.
CPC ...
166129 ; 1661175 ; 166183 ; 166321 ; 166322 ; 166324 ;
Abstract
There is disclosed apparatus for use in controlling flow through a tubing string suspended and packed off within a well bore and within the annulus between the string and well bore above and below the packer by tools adapted to be lowered into and raised from landed positions within a pocket to one side of a bore through a mandrel connected as part of the tubing string for releasing the packer to be set and opening a bypass therein and for opening and closing a flapper in the bore, as well as the bypass responsive to the supply of control fluid from a remote source to the pocket.