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:
Aug. 28, 1990
Filed:
Apr. 13, 1989
John R Setterberg, Jr, Dallas, TX (US);
Otis Engineering Corporation, Dallas, TX (US);
Abstract
A latching seal unit for use on a tubing string in a well bore for connecting the tubing string into a well packer having a receiving head provided with one or more latching lugs, the seal unit including a top sub connectable on a tubing string, a tubular locator body connected with the top sub, a latching collet cage having straight-slots mounted on the locator body formed of circumferentially spaced collet fingers defining longitudinal slots and guide surfaces providing entrances into the slots and a latching recess along each of the longitudinal slots, the longitudinal slots being sized to form an interference fit with the latching lugs in the well packer, and the latching recesses being sized to receive the latching lugs, a tubular seal body connected with the locator body, annular seal elements assemblies on the seal body for sealing with a packer bore, and a mule-shoe guide on the seal body below the seal element assemblies. The collet cage may be free to rotate or locked against rotation on the seal unit body. The coaction between the collet cage and packer lugs provides a surface detectable indication of proper landing of the unit in a packer. The seal unit is useable with prior art packers and has the advantages of both collet and straight-slot type prior art seal units.