Continuous composite rod and methods
AssigneeJohn Crane Production Solutions Inc.
InventorRussell P. Rutledge, Sr.
Life of this patent
Estimating the term…
Abstract
A continuous composite fiberglass sucker rod for connection between a pump and a pump drive has a rectangular cross section. End fittings having a rod receiving cavity are connected to the rod ends using a curable adhesive. The rod fitting is maintained in a vertical position with the cavity facing upwardly. The rod end portion is positioned in the cavity with the end at the bottom of the cavity. Curable adhesive is introduced into the cavity. A centralizer bushing is used to maintain alignment of the rod relative to the cavity. A portable heating device receives the fitting and rod end portion and enhances the curing process.
Claims6
A centralizer bushing for securing a sucker rod within an end fitting, said bushing comprising:
- a solid cylindrical body having ends,
- a partial bore open at one end of said body defined by a cylindrical wall having an internal cylindrical surface, and a bottom surface spaced from said open end,
- a longitudinal slot extending through said solid cylindrical body including said bottom surface, and said cylindrical wall,
- said slot in said solid cylindrical body comprising spaced facing wall surfaces and a transverse longitudinal surface therebetween, wherein the overall depth of the slot to said longitudinal surface relative to the inner cylindrical surface of said partial bore exceeds one half of the diameter of said cylindrical surface defining said partial bore.
In combination, a sucker rod end fitting and a centralizer bushing comprising:
- said end fitting including an outer cylindrical surface and defining a receiving rod cavity at one end thereof,
- said rod receiving cavity including at least one surface defining a minimum diameter thereof,
- a centralizer bushing comprising:
- a solid cylindrical body having ends,
- a partial bore open at one end of said body defined by a cylindrical wall having an internal cylindrical surface, and a bottom surface spaced from said open end,
- a longitudinal slot extending through said solid cylindrical body including said bottom surface and said cylindrical wall,
- said slot in said solid cylindrical body comprising spaced facing wall surface and a transverse longitudinal surface therebetween wherein the overall depth of the slot to said longitudinal surface relative to the inner cylindrical surface of said partial bore exceeds one half of the diameter of said cylindrical surface defining said partial bore.
Dependencies are inferred from the claim text.