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The fishingsteps are:(1) The lower lead mold is used for underground exploration to understand the position and shape of the falling objects.(2) According to the falling object situation and the size of the falling objec…

The main functions of Drilling:1. To obtain underground physical data, that is, take the core from the drilling core, core, cuttings, liquid, gas, and so on.2. As a geophysical logging channel, obtain data on various geo…

Sleeve MillingWhen the tool is lowered to the fish top for 2-3m, start the pump to wash, slowly lower the drilling tool to the fish top, add 10-20kn of WOB, and control the rotation speed within 50-100r / min. the displa…