Flexbar Products
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NPS | NPS BROCHURE

Shear Tool

When unseating pumps becomes a problem due to sand, scale or other mediums, the Flexbar Shear Tool (ST) can save money and hours of pulling unit time associated with stripping jobs.

Shear devices are imperative when using fiberglass or composite sucker rod strings and a good idea on many steel sucker rod strings. Since fiberglass and composite sucker rod strings cannot transmit sufficient backoff torque, it's best to have a reliable shear tool to release the rod string from the pump should you be unable to unseat it. Our shear tools are laboratory tested to assure accuracy and consistency. The Shear Tool is designed to shear and release when its rated load plus the sucker rod string weight is pulled (according to the pulling unit weight indicator). This should allow the removal of the sucker rod string. Used with a steel rod string, our shear tool can eliminate the need to back off the steel string several times while pulling the tubing to reach an unseated or stuck pump. See table for sizes and ratings.

Shear Tool Data Shear tool Schematics
Shear Tool (ST)
Box O.D. API Thread Size Shear Rating (X 1000 LBS)
1 5/8" 3/4" 16- 21- 26- 31- 36- 41
1 5/8" 7/8" 16- 21- 26- 31- 36- 41
* 1 13/16" 7/8" 16- 21- 26- 31- 36- 41
2" 1" 16- 21- 26- 31- 36- 41

* Available upon request

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.

* Available upon request