Downhole Jetting Tool takes samples and restores production
Well typeOil producer
The client wanted to obtain samples of the fill and fluid blocking the screens, and from that find suitable chemicals to flush the screens and re-open the reservoir flow path.
Welltec proposed a solution that would fulfill clients wishes in two stages:
1) Sample both solids and liquids at Target Depth (TD) using the Well Cleaner® Downhole Jetting Tool (DJT) with a new valve setup.
2) Convey suitable chemicals down to TD with Well Cleaner DJT, and flush the screens to re-open them.
This operation would introduce the Well Cleaner DJT as a sampling tool of liquids and solids collected in separate chambers, and as a safe and efficient means of conveying chemicals to be precisely applied to flush and re-open screens.
The DJT was kept running while moving over the screens, held at stations three meters apart for two minutes each time. The sequence was repeated while flushing well fluid mixed with surfactant.
Using the Well Cleaner DJT to spot and flush suitable chemicals, screens with no injectivity were successfully reopened to restore the well to production.
The DJT also reduced the volume of chemicals needed and saved the client from what was expected to be a much bigger clean out operation.
The Well Cleaner Downhole Jetting tool (DJT) is an efficient, e-line conveyed, surface-controlled method for jetting fluid downhole. Its innovative design can quickly create a large diameter hole in hydrate or wax plugs.