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Wireline (cabling)
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===Quick test sub=== A quick test sub (QTS) is used when pressure testing the pressure control equipment (PCE) for repetitive operations. The PCE is pressure tested and then broke at the QTS afterward to avoid having to retest the entire string. The PCE is then reconnected at the QTS. The QTS has two O-rings where it was disconnected that can be tested with hydraulic pressure to confirm the PCE can still hold the pressure it was tested to.
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