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. 06, 1994
Filed:
Sep. 10, 1992
Grey Bassinger, Midland, TX (US);
Other;
Abstract
A self aligning stuffing box for a pumpjack unit of the type having a polished rod reciprocatingly extending therethrough and downhole to a pump located at the lower end of the borehole. The stuffing box is an annular main body having a tubing adaptor at the lower end by which it can be mounted to the upper end of a well bore. A spool receiving cavity is located within the main body concentrically respective to the polished rod, and an annular spool is received within the cavity. The polished rod reciprocatingly extends through the spool and main body. A seal assembly is mounted to the inner surface of the spool for sealingly engaging the polished rod. The spool cooperates with the cavity to form a lubrication chamber that extends outwardly and about the spool. The spool moves within the spool receiving cavity radially of the passageway to align the polished rod with the wellbore. The adaptor forms a pack-off that isolates the seal from the wellbore, and provision is made by which the seal assembly can be replaced without removing the polished rod from the pumpjack unit.