The up-running-proof slip is used with a slip back-up packer (Y221-115 or Y211-115), after the up-running–proof slip support packer is packed, the pipe string moves upwards under the pressure of the oil reservoir, and the slip is used in a production well whose pipe string should be deserted after the electric pump well is packed.

31/2″EUE.59×17.5F Mid Joint	27/8″EUE.59×17.5F Mid Joint	31/2″EUE.59×17.5FCable protector
27/8″EUE.59×17.5FCable protector	Stuffing box	Sucker Rod Series
Tubing	Pumping Unit

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