Centralized Flexbars, Centralized Lift Subs and Master Centralized Flexbars

Centralized Flexbars and Centralized Lift Subs are designed to be a superior alternative to conventional composite or metal rod guides. By machining the guide area to the unit, movement of the guide or "slippage" is eliminated. The fluted area of the Centralizer provides maximum fluid flow area and minimum restriction or "piston effect" Built with the benefits of the Flexbar design, this allows your sucker rod string, sinkerbar string or valve rod (or tube) to remain centered in the tubing string minimizing contact area and wear on all related equipment.

The Centralized Flexbars and Centralized Lift Subs can be used as a guide between Sinkerbars or sucker rods in any portion of or all along the rod string. In deviated wells this results in maximum standoff clearance and longitudinal alignment of the pumping string. This can be especially helpful in maintaining high minimum loads so necessary for efficient fiberglass, composite or steel sucker rod designs.

We offer the Centralizers in AISI 4623 (API grade K) with either spray metal coating or uncoated. At the customer's request (and a small extra charge) the Centralized Flexbars can be produced with any combination of API pin or box sizes (even pin to box). Standard sizes are listed. (See Table)

When run above an insert pump, the Master Centralized Flexbar has proven effective in reducing pull rod or pull tube failures by centering the pull rod or tube with two guides spaced two feet apart. Reduced wear and failures in the pull rod guide and bushing assem bly are also possible.

By locating a Master Centralized Flexbar above a small diameter sinkerbar (1 3/8" or 1 1/2") used as a pull rod for tubing pumps, greater strength, rigidity and longitudinal alignment should result in reduced wear, failures and increased pump efficiency. (More than one sinkerbar may be required for tubing pumps with effective strokes greater than 25 feet.)