E-line workover restores 100MMscfd production
Well typeGas condensate
Deviation milling areaVertical
Pressure milling area3,200 psi
Water depth100 ft (30.5m)
Depth of fish179M MD-RKB (WL)
A Hold-Open Sleeve (HOS) had also dislodged and landed on top of the upside-down valve. Conventional fishing had failed to solve the problem, as the fishing head was sheared off in the process. Unable to latch onto the plug the operator called Welltec® for a swift, reliable milling solution to clear the well.
The Well Tractor and Well Miller were then run with a core bit before returning to surface with the bit full of metal slats. A new core bit milled for 7 hours until it was also full of metal slats. Two more runs were made until no debris was recovered. Then a Well Tractor and Well Miller with a smooth overshot tagged the Hold-Up Depth (HUD) and milled 1.5 ft (0.5m) recovering debris. Finally, a camera run confirmed all debris was retrieved, clearing the path to the damaged and inverted flapper valve.
The operator was impressed with Welltec’s overall job execution and now considers the use of Welltec e-line well intervention solutions on all jobs.
Completions & Well Intervention Coordinator, Conoc
“This was a job well planned and executed. What a great performance by Welltec, which resulted in the well-being brought back on-line at 100 MMscfd flow rate after two years of inactivity. 17 runs were conducted with zero misruns and no hse or quality incidents, which is an outstanding achievement.”
Deployed on e-line, our modular milling tools have proven to be robust and highly effective in removing well components that are malfunctioning or no longer required with robotic precision.
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.
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.