US Patent:
20080222867, Sep 18, 2008
Inventors:
Randall P. Robarge - Andover MN, US
International Classification:
B23P 19/04
Abstract:
A valve nut removal and replacement system including a plurality of associated tools and methods used for above ground access to, replacement of, and maintenance of worn, misshaped, abused or otherwise faulty valve nuts located at a subsurface location. A system is provided including tool components, many of which can be configured for multiple uses. The system provides for the cleaning and removal of a retainer nut, for the removal of a damaged valve nut, and for the installation and securing of a new valve nut from a remote above ground location.