复合钻进稳斜性能研究石油工程大学课程.docVIP

辽宁石油化工大学继续教育学院论文 毕业设计（论文） 题目： 复合钻进稳斜性能研究 PAGE IV 复合钻进稳斜性能研究 摘 要 复合钻进技术在油田的应用，可以提高机械钻速、控制井眼轨迹、减少扭方位次数，并可大幅降低钻井成本，从而提高油田开发速度。 木文对转盘与螺杆钻具联合钻进时的防斜打快机理进行了分析，采用纵横弯曲连续梁法，建立了这种下部钻具组合的力学模型，利用该模型定量分析了其控制井斜的力学特性，从理论上分析了这种下部钻具组合控制井斜的主要影响因素，为优化这种钻具组合和施工参数设计提供了理论依据。 对单弯螺杆防斜钻具组合分析表明：稳定器安放位置距钻头越远钻头侧向力越大；钻压对钻头侧向力影响不明显；弯角和肘点位置对钻头侧向力有明显的影响，这对专用防斜螺杆钻具的设计改进提供了理论依据；复合钻进在井斜角较大时显示出大的侧向力。 关键词：复合钻进；稳斜；纵横弯曲法；钻头侧向力 Steady inclined properties of composite drilling Abstract That the application of combined drilling technology in oil field can heighten drilling speed, control well trace, reduce the number of direction torsion and greatly reduce drilling cost which accelerate the oil field developing speed. This paper analyzed the mechanism of well straightening and improving ROP as turnplate and screw drill rotate together, Using continuous beam theory, the mechanical model of BHA is established. Applying the model, the mechanical characteristics of BHA to control deviation are studied quantitatively. The main affect factors of BHA to control deviation are analyzed theoretically, which provides the theoretical ground for BHA optimization and the design of working parameters. The analysis of complex drilling indicates that during the stable period, the longer the distance between the stabilizers and bit, the bigger the side force will be. Bit weight has little effect on bits side force. Angle and elbow position have much effect on bits side force, and that is the theoretic base for designing special PDM against well deviation. complex drilling on well straightening shows bigger the side force in big deviation angle. Key words: complex drilling; hold angle; continuous beam theory; the lateral force 目 录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc373917545 摘 要 PAGEREF _Toc373917545 \h I HYPERLINK \l _Toc373917546 Abstract PAGEREF _Toc373917546 \h II HYPERLINK \l _Toc373917547 目 录 PAGEREF _Toc373917547 \h III HYPERLINK \l _Toc373917548 第1章 前 言 PAGEREF _Toc37