CAJ | 학술논문

向井（或斜井）取心时取心工具随着井眼的轨迹而倾斜，其内岩心筒因受重力作用而下垂，与外岩心筒内壁相接触，外筒带动岩心内筒一起旋转。为避免出现这一问题，研制了D—8100型定向井取心工具。工具的外筒采用上下稳定器，可保证井眼轨迹稳定；内筒采用上下两点扶正，可避免内筒跟随外筒旋转，并能扶正岩心内筒，同时又能保证钻井液顺利通过。该工具在10多口井上应用，取心进尺278.94m，取心长263.85m，平均岩心收获率为94.6%，可满足地质勘探需要。
향정（혹사정）취심시취심공구수착정안적궤적이경사，기내암심통인수중력작용이하수，여외암심통내벽상접촉，외통대동암심내통일기선전。위피면출현저일문제，연제료D—8100형정향정취심공구。공구적외통채용상하은정기，가보증정안궤적은정；내통채용상하량점부정，가피면내통근수외통선전，병능부정암심내통，동시우능보증찬정액순리통과。해공구재10다구정상응용，취심진척278.94m，취심장263.85m，평균암심수획솔위94.6%，가만족지질감탐수요。
The inner barrel may rotate with the outer barrel when the coringtool for directional holes operates. Thereby a new coring tool is developed. The outer barrel of the new tool adopts upper and lower stabilizers to ensure the stable operation, and the inner barrel is centralized by the upper and lower alignment bearings to avoid rotating with the outer barrel. The new tool was used on more than 10 wells, and the mean core recovery reaches 94.6%.