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Tubing String Testing Valve（TST-Valve）
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Baoji
7″ -13 3/8″ :
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The tubing string testing (TST) valve is a full-opening valve used to pressure-test the work string while running in the hole. The valve is operated after it is stung into a permanent packer or a retrievable packer is set.
Features
*Flapper valve requires only 4psi to open
*Testing string can be pressure-tested as many times as required as it is run in the hole.
*Valve shear rating can be pre-determined at 500psi increments.
*Valve can also be used for pipe flexing.
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