煤田地质与勘探2024，Vol.52Issue(6)：166-173,8.DOI:10.12363/issn.1001-1986.24.01.0038
基于延时微分的旋转导向工具造斜率预测方法研究
Build-up rate prediction of rotary steerable tools based on delay differentiation
摘要
Abstract
[Objective]Accurate build-up rate prediction of rotary steerable tools is a prerequisite to achieve the precise control of tools.In order to grasp the variation law of the build-up rate of the rotary steerable bottom-hole assembly(RSBHA).[Methods]Based on the structural charaeteristics of the tool,the Euler-Bernoulli beam equation method is used to analyz the forces outing on the composite RSBHA.At the same time,the calculation method of the tool deflec-tion angle in different sections and the bit pre-drilling deflection angle was obtained with consideration to the geometric relationship of the bottom-hole assembly,and the distance between the connecting points of rotary steerable tool and bit was taken as the spatial delay period.Finally,a prediction model for the build-up rate of the RSBHA based on delay dif-ferentiation was established.This model comprehensively considers the qualitative influence of parameters,such as the geometric size and structure of the tool itself,the cutting anisotropy of the drill bit related to the formation,the weight on bit,and the bending stiffness related to the tool material and the inner and outer diameters,on the build-up rate.[Results and Conclusions]The study shows that:(1)The predicted results of this model are in good agreement with the simula-tion results of Schlumberger's mature build-up rate prediction software based on the finite element analysis,and the dif-ference between the predicted results is maintained within 0.5(°)/30 m,which meets the engineering requirements.(2)This method can also compensate for the measurement error caused by the distance between the drill bit and the meas-urement unit based on the actual measurement data of the drilling tool attitude gauging nipple,providing a new way to solve the problem of unmeasurable are.This build-up rate prediction method based on spatial delay differentiation provides theoretical basis and rapid analysis means to optimize the structure of RSBHA and the drilling parameters.The established model is easy to simulate and transplant,and can obtain good real-time response in practical engineering ap-plications,which provides an accurate foundation of drilling tool movement model for the development of rotary steer-able tools based on digital twins.关键词
旋转导向系统/底部钻具组合/造斜率预测/力学分析/延时微分Key words
rotary steerable system/bottom-hole assembly/build-up rate prediction/mechanical analysis/delay differen-tiation分类
矿业与冶金引用本文复制引用
李飞,张楠..基于延时微分的旋转导向工具造斜率预测方法研究[J].煤田地质与勘探,2024,52(6):166-173,8.基金项目
国家重点研发计划项目(2023YFC2810900) （2023YFC2810900）
国家自然科学基金企业创新发展联合基金重点项目(U20B2029) （U20B2029）
陕西省重点研发计划项目(2024GX-YBXM-504) （2024GX-YBXM-504）
陕西秦创原"科学家+工程师"团队项目(2022kxj-125) （2022kxj-125）
陕西省技术创新引导专项项目(2024ZC-YYDP-22) （2024ZC-YYDP-22）
西安石油大学研究生创新与实践能力培养计划项目(YCS23213045) （YCS23213045）
