• Categories:Industry News
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• Time of issue:2020-05-18
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Summary：Sand control screens are widely used in the regeneration of old wells in oil exploration, new oil wells and exploration (test) wells, offshore oil extraction wells and pumping pipes, used in horizontal wells, side drilling, radial branch wells or open holes, gravel packing screens Tube completion for limited sand control.

At present, the processing methods for the holes of the sand control screen mainly include the milling method with a sheet milling cutter and the grinding method with a sheet grinding wheel. Although these two methods are the more common processing methods used in the processing of sand control screens, due to The limitation of milling and grinding amount and the strength restriction of the chip milling cutter and the chip grinding wheel not only make the processing efficiency low, but also the smaller cutting gaps are above 0.35±0.05 mm.

The nozzle on the spray head should be drilled according to the design requirements before each operation. The nozzle on the side of the spray head is used to clean the pipe wall, and the nozzle at the bottom of the spray head is used to clean bridges or solid-phase cutting. Through the rotation and up and down movement of the spray head repeatedly through the cleaning section, the entire pipe wall of the cleaning section can be thoroughly cleaned. Clean.

Various methods can be used to remove the scale in the pipe, such as grinding and washing with Dyner drilling tools on the coiled tubing, pickling and reaming with a steel wire reamer, but each method has its limitations. The high-pressure jet cleaning system includes A displacement jet tool, downhole filter, surface filter equipment, circulating pump, coiled tubing equipment and computer software system.