Shifting 11 sleeves in one run to reduce water cut
Max. depth4,800 m (15,748 ft)
Max. temperature73°C (163°F)
Pressure133 bar (1,929 psi)
Distance tractored5,232 m (17,493 ft)
Sleeves shifted11 in 1 run
Water cutDecreased from 70% to 30%.
Initially, a third-party service provider attempted to shift the sleeves closed six months earlier. That attempt, however, failed when a restriction in the well circulation valve prevented the provider from reaching the shifting intervals at 3,160 meters.
On site, Welltec was in charge of all operations. The Well Tractor 318, Well Stroker 314, Well Key 325, and a multi-finger caliper tool were run in hole. In one run lasting only four hours, Welltec closed the 11 flow control sleeves successfully. During this same run, Welltec also confirmed by caliper that the sleeves had shifted. In a second run, production logging confirmed that all 11 flow control valves were closed with no flow from the screens.
Since closing the 11 control device sleeves, water cut in the well has decreased from nearly 70% to 30%. Welltec’s work decreased the time for the client to achieve crude oil. In addition to the time savings, reducing the water cut has also saved the client significant costs.
Welltec has long been known for conveyance operations in Russia, but that may be changing in light of this mechanical shifting success. The client was very satisfied with Welltec’s results on this operation and has requested the same work on another well in the near future.
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.
The Well Tractor was regarded as a revolution in the industry when it was introduced in the 1990’s. It enables operators to extend the reach of traditional e-line deployment into highly deviated and horizontal wells.
The Well Key brings a high degree of flexibility and reliability to the well completion design as it is designed to shift multiple sliding sleeves in a single run.