The new Well Stroker® XXS saves five days of rig time by fishing a setting tool
WELL TYPEProducer, cased hole
FISHING DEPTH9,100 ft (2,774m)
DEVIATION @ FISH35°
PRESSURE @ FISHING DEPTH3,626 psi (250 bar)
TEMPERATURE @ FISHING DEPTH~230°F (~ 110°C)
Welltec® suggested using the new Well Stroker® XXS as a contingency to avoid the possibility of a workover rig. The challenge was twofold: to complete the setting sequence and retrieve the setting tool at 9,100 ft (2,774m). The plug had been partially set but the setting tool had failed before it could break the stud connecting to the plug. The operator anticipated that the force needed to shear the stud and free the setting tool could be up to 40,000 lbs.
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.
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.
Despite the worn fishing neck, the fishing operation was completed in just four grapple attempts.
The Well Stroker® can push or pull multiple times in the same run irrespective of the depth and deviation. It delivers up to 100,000 lbs of axial force downhole using a bi-directional hydraulic ram.
Welltec Release Device® (WRD®) is a simple tool which adds versatility and risk reduction to the operation. It provides predetermined locations in the toolstring where it can be parted, should it become stuck.