Flexbar Products
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Sandia Report on Flexbar, Inc.

Flexbar Cold Drawn Sinkerbars

NPS | NPS BROCHURE

Sinkerbars

  • Manufactured from the highest quality API grade K (AISI 46XXM) and API grade C (AISI 10XX) series steels.
  • By installing Flexbar Sinkerbars above the pump, tension can be maintained in the sucker rods and higher minimum loads can be achieved.
  • When engineered with our assistance, Flexbar Sinkerbars can significantly reduce rod and tubing wear and failures, extending the operating life of any steel or fiberglass sucker rod string.
  • By using the heavier weight of Sinkerbars to help the pump and sucker rod string fall, smaller diameter high strength steel or fiberglass sucker rods can be used often in conjunction with smaller pumping unit gear boxes and prime movers to produce more fluid
  • We utilize computer predicted rod string analysis at no cost to the customer. This helps assure that you are buying the most efficient pumping system available specifically designed to your needs.
  • The table of data below has been listed to assist customers in the use of their own design formats.
FLEXBAR SINKERBARS (C or K Grade) With or Without Neck Sinkerbar Schematic
Description

Minimum
Tubing I.D.

lbs./Bar lbs./Bar API Pin Size Decimal
O.D. Equiv.
1 1/4" 2" 4.172 104.3 5/8" 1.250"
1 1/4" 2" 4.172 104.3 *3/4" PRC 1.250"
1 3/8" 2" 5 125 3/4" 1.375"
1 1/2" 2" 6 150 3/4" 1.500"
1 1/2" 2" 6 150 7/8" 1.500"
1 5/8" 2 1/2" 7 175 7/8" 1.625"
1 3/4" 2 1/2" 8.2 205 7/8" 1.750"

* Polished rod pin (requiring polished rod coupling)

Changes and updates to this data will be provided on current price lists.

… please review our technical papers and case studies and/or contact us.