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. 06, 1990
Filed:
Jan. 25, 1988
Hiram E Lindsey, Midland, TX (US);
Paul W Cole, Odesa, TX (US);
Lindsey Completion Systems, Inc., Midland, TX (US);
Abstract
A system for cementing liners in well bores where a liner and drill pipe are made up in telescopic relationship with the lower end of the drill pipe having a polished mandrel or slick pipe slidably and sealingly received in a sealing bore receptacle in the lower end of the liner at a location just above the cementing equipment. When an interconnected setting tool and liner hanger are attached to the drill pipe and liner, a continuous passage is formed by the drill pipe from the setting tool to the location below the sealing bore receptacle. The polished mandrel has an upper normally closed sleeve valve and a lower normally open check valve so that when the liner hanger is located in the well bore, the check valve can be closed for hydraulic operation of the setting tool and opened thereafter for cementing. The sleeve valve is opened at the end of the cementing operation to bypass the interior of the pipe string to the interior of the liner.