The gap between Chinese drilling equipment and that of other countries is still large in its quality and the application of high-level technology. Components of drilling rig are unadvanced and unreliable. The fundamental industry in China lags behind other countries for its poor materials and components. China is capable of designing and manufacturing conventional onshore drilling rig, but having no capability of designing and manufacturing the rig applied to extremely cold area, the deep well rig of high movability applied to desert area, the rig applied to swamp area, and the rig using special drilling technology, etc..
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