Planning was complicated by the worn out fishing neck. It was uncertain how many latches and to what force the fishing neck could sustain. Applying the new Well Stroker XXS would ensure that the most force available from an e-line tool would be put to work from the onset. As well, two Welltec Release Devices® (WRD’s) were combined in the toolstring, one below the Well Stroker and one below the cable head. These addressable devices would allow further contingencies to mitigate risk and increase safety. As expected, there were some difficulties to latch the worn fishing neck. The first attempts were unsuccessful as the fish unlatched from the overshot. However, on the fourth attempt a good latch was observed with 900 lbs overpull applied. The tool was then activated and with 31,500 lbs force seen at surface, the shear stud parted completing the setting sequence and freeing the stuck setting tool.
Despite the worn fishing neck, the fishing operation was completed in just four grapple attempts. The operator was very pleased to get the well work back on track while avoiding the costs of a workover rig. The application of this new technology and the crew’s performance saved an estimated five days of rig time. The well is now ready for the next phase of operations and the Well Stroker XXS has proved its worth to the operator. In fact, the operator now uses Welltec for any fishing job where a slickline company has failed or where differential pressure makes other operations too risky.