General process of oil drilling

Let me talk about the land drilling process: give an example

Moving and installing equipment - drilling 26" guide hole 50 meters - lowering 20" conduit - cementing - drilling: drilling 17 - 1/2" hole 500 meters - lower 13-3/8" surface casing - cementing - measure sound amplitude (measure cementing quality, some surface layers are not measured) - drill 12-1/4" hole 2500 Meters - Electrical survey - Run 9-5/8" technical casing - Cementing - Measure sound amplitude (measure cementing quality) - Drill 8-1/2" borehole 3500 meters - Electrical survey - Run 7" oil casing - Cementing - Measuring sound amplitude (measuring cementing quality)

The basic situation is this. Some wells are relatively simple and shallow (1500 meters), so the procedures are relatively simple; for complex deep wells (5000 meters), The process is very complicated.