石油学报 ›› 2026, Vol. 47 ›› Issue (6): 1258-1266,1277.DOI: 10.7623/syxb202606010

• 石油工程 • 上一篇    

预弯曲动力学防斜打快技术深层次提速机制

狄勤丰1,2, 彭章祝1,2, 骆大坤1,2, 刘湘华3, 于洋3, 王文昌1,2, 陈锋4   

  1. 1. 上海大学力学与工程科学学院 上海 200444;
    2. 上海市应用数学和力学研究所 上海 200444;
    3. 中国石油化工股份有限公司西北油田分公司 新疆乌鲁木齐 830011;
    4. 上海大学机电工程与自动化学院 上海 200444
  • 收稿日期:2025-10-04 修回日期:2026-04-22 发布日期:2026-07-02
  • 通讯作者: 王文昌,男,1982年5月生,2011年获上海大学工程力学专业博士学位,现为上海大学副教授,主要从事石油管杆柱力学研究。Email:wangwenchang1982@163.com
  • 作者简介:狄勤丰,男,1963年8月生,1997年获西南石油学院油气井工程专业博士学位,现为上海大学二级教授,主要从事石油工程力学的研究和应用工作。Email:qinfengd@sina.com
  • 基金资助:
    国家自然科学基金项目(No.52174003,No.52574006,No.52374008)资助。

In-depth enhancement mechanism of pre-bending dynamic vertical and fast drilling technology

Di Qinfeng1,2, Peng Zhangzhu1,2, Luo Dakun1,2, Liu Xianghua3, Yu Yang3, Wang Wenchang1,2, Chen Feng4   

  1. 1. School of Mechanics and Engineering Science, Shanghai University, Shanghai 200444, China;
    2. Shanghai Institute of Applied Mathematics and Mechanics, Shanghai 200444, China;
    3. Sinopec Northwest Oilfield Company, Xinjiang Urumqi 830011, China;
    4. School of Mechatronics Engineering and Automation, Shanghai University, Shanghai 200444, China
  • Received:2025-10-04 Revised:2026-04-22 Published:2026-07-02

摘要: 预弯曲动力学防斜打快技术(PBDVD)是一种使用广泛的低成本防斜提速钻井技术,通过带预弯结构底部钻具组合(PB-BHA)的有序涡动,在钻头上形成较大的防斜力,从而实现防斜和提速双重目的。对这种技术的深层次提速机制进行了研究,在建立和求解PB-BHA动力学模型的基础上,重点分析PB-BHA的涡动特征,研究弯角这一关键参数对钻头上的动态侧向力和动态轴向力的影响,进一步深层次探明PBDVD的提速机制。研究结果表明,对于所给算例和常用的螺杆钻具(弯角<1.5°),钻头上的动态防斜力会随着弯角的增大呈现出增大的趋势,但当弯角超过一定值后,防斜力的变化逐步趋于平缓;随着弯角的增大,钻头上的动态轴向力的平均值呈现线性增大趋势,也即弯角越大,钻头对井底的动态钻压愈大,而且其不均匀度逐渐增加,尤其当弯角超过0.7° 时,这种不均度随着弯角的增大而增加,并且在0.7°~0.9° 弯角范围内有一个快速增加。因此,PBDVD的提速机制一方面是由于防斜力提高,允许使用较大的钻压,进而实现提速;另一方面动态钻压的平均值和不均度也得到提高,这有益于钻头对井底岩石的破坏,进一步实现提速。

关键词: 预弯防斜BHA, 提速机制, 不均匀轴向力, 动态侧向力, 弯角

Abstract: Pre-bending dynamic vertical and fast drilling (PBDVD) technology is a widely adopted, cost-effective drilling technique for deviation control and rate-of-penetration (ROP) enhancement. By facilitating the ordered whirling motion of a pre-bent bottom hole assembly (PB-BHA), the technology generates a substantial restoration force at the bit, thereby achieving the dual objectives of verticality control and accelerated drilling. This paper explores the underlying ROP enhancement mechanisms of PBDVD. Following the development and numerical solution of a PB-BHA dynamic model, the research focuses on analyzing the whirl behaviors of the assembly and the influence of the bent angle, a very important key parameter, on the dynamic lateral and axial bit forces. Particular emphasis is placed on the effect of the bent angle of PB-BHA on bit lateral and axial forces to further elucidate the enhancement mechanisms of PBDVD. Results indicate that for the specified case study and commonly utilized PDM (with bent angles less than 1.5°), the dynamic anti-deviation force on the bit tends to increase with the bent angle, but gradually plateaus when the bent angle exceeds a certain threshold. Concurrently, the mean dynamic axial force on the bit exhibits a linear increase relative to the bent angle; specifically, a larger bent angle results in a greater dynamic weight-on-bit (WOB) exerted on the bottom hole. Furthermore, the heterogeneity of the dynamic axial force progressively enhances with increasing bent angle, particularly when the bent angle exceeds a critical value (0.7°), with a rapid surge observed within the 0.7°-0.9° range. Based on the research findings, the ROP enhancement mechanism of PBDVD can be expanded into two aspects: (1) The improvement of the anti-deviation force allows for the application of a higher WOB, thereby increasing the ROP; and (2) Enhanced mean dynamic WOB and intensified force heterogeneity also promote rock fragmentation at the bottom hole, further contributing to ROP increase.

Key words: pre-bent anti-deviation BHA, ROP enhancement mechanism, non-uniform axial force, dynamic lateral force, bent angle

中图分类号: