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:
Sep. 14, 1993
Filed:
Jun. 08, 1992
William D Henderson, League City, TX (US);
Otis Engineering Corporation, Dallas, TX (US);
Abstract
An improved catcher sub has a longitudinal flow passage and a collet slidably mounted around the flow passage in the sub housing. The collet has a number of fingers and each finger has a resilient seal segment. The collet is held and supported in up fingers contracted position where the resilient seal segments seal on each other forming an annular seal ring smaller than the longitudinal flow passage. When high pressure is applied on a ball sealingly engaging the annular seal ring, the collet is supported in the up contracted position while the pressure moves an annular piston to a position which permits the collet to be moved to a lower expanded position larger than the longitudinal flow passage by a later application of lower pressure on the ball and the ball to be expended downwardly through the collet and sub flow passage.