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一、概 述我国金刚石小口径定向钻探技术，是在普通岩心定向钻探技术发展基础上而日趋完善的。目前已广泛用于：1．补取岩矿心，纠斜，绕过孔内事故钻具；2．在钻孔自然弯曲严重而有规律的矿区，利用自然弯曲规律施工初级定向孔；3．在地面地理位置限制和在地下勘探目标用定向钻探施工有利于提高勘探速度、节约费用的情况下，用人工弯曲施工受控定向孔。近几年来，由于新型无楔体连续造斜器，小直径液动螺杆钻（配弯接头），摆锤、斜口引鞋、随钻定向仪等的研制成功，我们已能施工高质量、高精度的小口径受控定向孔。
First, an overview of China’s small-diameter diamond directional drilling technology is based on the development of ordinary core directional drilling technology and maturing. Has been widely used: 1. Replenishment rock heart, skew correction, around the hole accident drill; 2. In the drilling natural and serious curvature of a regular mining area, the use of natural curvature of the primary hole directional construction; 3. Constraints on the ground and underground exploration targets with directional drilling construction is conducive to improving the exploration speed, cost savings, the use of artificial bending controlled directional holes. In recent years, due to the successful development of a new wedge-free continuous whipstock, small diameter hydraulic screw drills (with bent joints), pendulums, sloping shoes and directional drills, we have been able to construct high quality, High-precision small diameter controlled directional hole.