218 Well Tractor® with extended wheel arm overcomes restriction
Well typeInjection well
Total depth16,996 ft (5,180m)
Max. temperature136°F (58°C)
Max. well pressure458 Bar
5½” production tubingwith 7” WEG
7 3/8” IDproduction Liner
With plans to connect 5½” production tubing inside the 8 ¼” production liner, this would be attempted using a 7” wireline entry guide (WEG).
However, due to the difficult well trajectory, the operator could not directly reach the top of the lower production liner with the upper production tubing. This would leave a 40-meter interval to tractor from the WEG through the exposed 9 5/8” casing interval, in an 85° deviated section. The extent of the restriction would mean only 54mm rollers could be used in order to reach the top of the 7 3/8” ID liner.
In order to allow the tractor to run in 9 5/8” casing, the standard configuration of the 218 Well Tractor would need to be adapted. Welltec’s D&E department quickly set about modifying the length of the wheel arm.
After successfully tractoring through the casing, a total distance of 14,678 meters was covered, twice reaching target depth.
The successful operation provided the client with important data on well conditions, ultimately allowing them to work more efficiently.
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.