Setting of failed production packer
As the well was highly deviated (85°), the work needed to be performed either on drill pipe, coiled tubing, or conveyed by the Well Tractor®. Initially, Sonangol had considered coiled tubing, but chose Welltec® due to lower cost and reduced time compared to coiled tubing or drill pipe.
Finally, the Well Stroker pulled the plug. In all runs, a Welltec Release Device® was placed below the Well Stroker to provide a robust contingency of command release in case the plug or sleeve was stuck.
Welltec’s wireline equipment provided a number of benefits over CT and drill pipe:
• Faster runs required
• Four days of floater rig-time saved
• Avoided rig-up of CT lifting frame
• Avoided heavy lifts of CT lifting frame
• More cost-effective
Welltec is now the provider of choice for Sonangol as a primary mechanical intervention option.
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 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.