Field application of mechanical static-push vertical drilling tool in high-steep piedmont structures of western China

Abstract:

In order to solve the technical problem of anti-deviation and straight drilling under complex working conditions such as the high dip angle formations in the high and steep structures of western China， a low-cost mechanical static push-against automatic vertical drilling tool has been applied. This tool has a pure mechanical three-layer independent rotation structure and is composed of components such as a gravity-biased stable platform. It can actively prevent and correct deviation during the drilling process， and has the characteristics of high temperature resistance， high rotational speed， strong vibration resistance， and low cost. It was applied 4 times in the third section of the ?311mm borehole of Well FSCZ-9 in high-steep piedmont structures of western China. The cumulative footage was 1680.16m. The inclination of the entire well section could basically be controlled below 1°， achieving good test results for anti-deviation and straight drilling. Compared with traditional technologies and foreign systems， the pure mechanical structure improves reliability， reduces costs， effectively， releases the weight on bit， and increases the rate of penetration. The on-site application has verified the feasibility， stability， and reliability of the tool， providing technical support for the further on-site promotion and application of the tool， offering an efficient and reliable solution for drilling in complex formations， and being of great significance for the development of drilling technology.