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:
Oct. 27, 1981
Filed:
Dec. 27, 1979
Applicant:
Inventors:
James D Hendrickson, Carrollton, TX (US);
Pat M White, Lewisville, TX (US);
Assignee:
Halliburton Company, Duncan, OK (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166184 ; 166334 ; 166240 ; 166150 ;
Abstract
A crossover tool for use with concentric tubing strings. The apparatus disclosed provides the ability to treat and/or gravel pack a producing zone in a well, and is particularly suited for use in a multiple-zone well. The crossover tool may be locked in any one of three positions: a circulate mode, a closed test mode, or a closed bypass mode to facilitate movement of the tool within the well bore. All operation of the crossover tool is effected by reciprocation of the pipe string to which it is attached. Alternative embodiments are also disclosed which dispense with the closed test mode.