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

Di Qinfeng; Peng Zhangzhu; Luo Dakun; Liu Xianghua; Yu Yang; Wang Wenchang; Chen Feng

doi:10.7623/syxb202606010

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

更新时间：2026-07-10

- In-depth enhancement mechanism of pre-bending dynamic vertical and fast drilling technology
- ACTA PETROLEI SINICA Vol. 47, Issue 6, Pages: 1258-1266(2026)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
- DOI：10.7623/syxb202606010
  CLC： TE242
- Online First：02 July 2026，
  
  Published：2026
- 稿件说明：
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狄勤丰, 彭章祝, 骆大坤, 刘湘华, 于洋, 王文昌, 陈锋. 预弯曲动力学防斜打快技术深层次提速机制[J]. 石油学报, 2026, 47(6): 1258-1266,1277.

Di Qinfeng, Peng Zhangzhu, Luo Dakun, et al. In-depth enhancement mechanism of pre-bending dynamic vertical and fast drilling technology[J]. ACTA PETROLEI SINICA, 2026, 47(6): 1258-1266.
狄勤丰, 彭章祝, 骆大坤, 刘湘华, 于洋, 王文昌, 陈锋. 预弯曲动力学防斜打快技术深层次提速机制[J]. 石油学报, 2026, 47(6): 1258-1266,1277. DOI： 10.7623/syxb202606010.

Di Qinfeng, Peng Zhangzhu, Luo Dakun, et al. In-depth enhancement mechanism of pre-bending dynamic vertical and fast drilling technology[J]. ACTA PETROLEI SINICA, 2026, 47(6): 1258-1266. DOI： 10.7623/syxb202606010.

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。

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.

关键词

Keywords

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