连续造斜绳索取心钻具造斜机构的设计与试验

Design and Test of Continuous Deflecting Wire-line Coring Tool Assembly

摘要:

根据钻杆抗弯强度的限制，确定连续造斜绳索取心钻具的造斜能力在0.2°～0.5°/m。为满足绳索取心的要求，设计造斜机构采用偏心轴承结构。分别利用几何分析法与极限曲率法对造斜结构的造斜能力进行理论计算。实验结果表明，该造斜机构能够达到设计造斜能力，用纵横弯曲梁法的计算造斜率与实钻造斜率较为吻合。

Abstract:

According to the limit on bending strength of drilling rod, the deflecting ability of continuous deflecting wire-line coring tool assembly is from 0.2° to 0.5°/m. To satisfy the requirement of wire-line coring, eccentric bearing structure was adopted in deflecting assembly design. Theoretical calculation was made on deflecting ability with geometry analysis method and limiting curature method. The results showed that designed deflecting ability was obtained, and the calculation result with beam-column theory was more exact to actual deflecting rate.