Borehole Trajectory Control Technology of Small-caliber Wireline Core Drilling in Strong Deflection Formation of Lanling Iron Deposit
Under the guidance of the new round of breakthrough strategic actions in mineral exploration,small-diameter rope core drilling technology is constantly innovating and developing towards"deep,in-clined,and difficult"aspects.In terms of"inclination",directional drilling technology remains an impor-tant technical challenge.Accompanying with gradual deepening of research on trajectory control technolo-gy for small-diameter rope coring drilling by different scientific research units and drilling construction teams in recent years,various methods for deviation and correction of drilling trajectories have also been tested and implemented in different types of drilling,but the quality and effectiveness of correction vary.In this paper,taking the construction of 9 directional boreholes in Lanling iron deposit in Xiaozhaizi-Gu-lin section as the research object,by studying the trajectory control technology of small-diameter rope co-ring drilling in strong inclined strata,different drilling trajectory control technology methods have been compared and analyzed.A comprehensive drilling trajectory control technology system specifically de-signed for strong inclined strata has been summarized.
Lanling Iron depositstrong inclined formationsmall-diameter wireline core drillingdirec-tional drillingShandong province
万方数据
维普
