CT CRX is a hydraulically activated tool
The CT CERX is a hydraulically activated tool used to run and set CEX & CER locking mandrels into their matching landing nipples.
The CT CERX Running Tool uses the field-proven dog latch system which is easily released from the internal fishing neck of the Locking Mandrel, when set.
Increasing the CT flow/pressure to the tool will hydraulically move the Locking Mandrel keys into the locating position. The flow rate is then reduced to a circulating condition.
Once the Locking Mandrel is located, increasing the CT flow/pressure will shear out a shear ring, while simultaneously setting the Locking Mandrel into the nipple profile, and releasing the dogs of the running tool.
Any upward jarring action will then shear a pin holding the Locking Mandrel to the core, thus releasing the CT CERX tool and confirming the Lock-set position.