MICHAEL L RIZZONE
Engineers in Dallas, TX
License number
Pennsylvania PE021122E
Category
Engineers
Type
Professional Engineer
Address
Address
2
Dallas, TX 75238
Pennsylvania
Pennsylvania
Professional information
Inertia Bar For Sucker Rods
US Patent:
4221549, Sep 9, 1980
Filed:
Oct 12, 1976
Appl. No.:
5/731596
Inventors:
Michael L. Rizzone - Dallas TX
Walter S. Secrist - Dallas TX
Walter S. Secrist - Dallas TX
Assignee:
United States Steel Corporation - Pittsburgh PA
International Classification:
F04B 2100
US Classification:
417437
Abstract:
An inertia bar to be installed in a well between a sucker rod string and a subsurface pump. A string of the bars adds weight to the sucker rod string and maintains it under tension throughout a pumping cycle. A sufficient number of the bars are used to place a neutral zone within the inertia bars. The neutral zone is a zone in which there is neither tension nor compression in the bars. The body of each bar has a relatively large diameter, which for example may be the same as the outside diameter of the couplings used to connect the individual sucker rods. The bar has pins at its ends for engaging the couplings, which pins have the same dimension as standard sucker rod pins. The bar can be engaged by a conventional elevator when it is to be removed from a well.