RIGLESS RETRIEVAL OF STUCK LOGGING STRING

Rigless retrieval of stuck logging string

Background

An operator was faced with the challenge of removing a stuck tool. A third party tractor and production logging string was stuck in a section of the well in which the ID had changed drastically. It was critical that the fishing operation be done without the use of a rig or coiled tubing unit.

Operation

A 3 1/8” Well Tractor®, Well Stroker®, Welltec Release Device® (WRD) and a grapple overshot were called out. The toolstring was rigged up and ran into the well to a depth of 9,500 ft (2,895m) MD. The Well Tractor conveyed the toolstring down to 10,200 ft (3,109m) MD where the fish was located.

At this point the overshot was tractored onto the fishing neck of the stuck tractor and logging string, and the Well Stroker was engaged. Using the Well Stroker’s extendable, hydraulic arm with the ability to push or pull over 20,000 lbs of force, the fish was caught and pulled.

Tension readings from the surface indicated the fish was loose and the toolstring began to be pulled out of the hole. Approx. 1000 ft (330m) from surface, the toolstring became wedged in the Sub Surface Safety Valve (SSSV). The Well Stroker was activated again to stroke through the SSSV and successfully pulled the jammed toolstring through without any damage. The fish was then recovered to surface.

Achievements

As Welltec® was able to quickly remove the fish from the well, the operator saved coiled tubing and rig costs, as well as deferred and lost in hole costs for the recovered tools. Production was returned to the levels seen before the fish became stuck.

The total operating time was 16:45 hours, with a conveyance time around 27 minutes. The operator concluded that Welltec’s e-line technologies provide a much more efficient way of fishing in tubing than conventional methods, as they, due to their lightweight nature, take significantly less time to mobilize and deploy onto a drilling rig. As well, Welltec’s fishing solution requires less people and therefore delivers a more positive HSE impact to operations.

The operator concluded that Welltec’s e-line technologies provide a much more efficient way of fishing in tubing than conventional methods, as they, due to their lightweight nature, take significantly less time to mobilize and deploy onto a drilling rig.

Tools Applied

  • Well Tractor®

    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.

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  • Well Stroker®

    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.

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  • Welltec Release Device®

    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.

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