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. 10, 1976
Filed:
Dec. 23, 1974
Applicant:
Inventor:
George M Raulins, Dallas, TX (US);
Assignee:
Otis Engineering Corporation, Dallas, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166214 ;
Abstract
A selective down-hole tool landing shoulder employing a housing with sliding internal sleeve member positionable between first and second detented positions within the housing. Resilient collet members, depending from the sleeve, carry radially inwardly extending bosses which define a full-bore opening with the sleeve in one position, and which are forced radially inwardly by camming action to define a restrictive bore as the sleeve is positioned to the second position.