PDC磨损齿切削破岩过程的实验研究

doi:10.11885/j.issn.1674-5086.2020.06.04.03

西南石油大学学报(自然科学版) ›› 2023, Vol. 45 ›› Issue (1): 180-188.DOI: 10.11885/j.issn.1674-5086.2020.06.04.03

• 石油机械与油田化学 • 上一篇

PDC磨损齿切削破岩过程的实验研究

杨迎新^1,2,3, 谢松^1,2, 蔡灿^1,2,3, 曹煜磊¹, 李邦润^1,2

1. 西南石油大学机电工程学院, 四川成都 610500;
2. 油气钻完井技术国家工程研究中心·西南石油大学, 四川成都 610500;
3. 油气藏地质及开发工程国家重点实验室·西南石油大学, 四川成都 610500

收稿日期:2020-06-04 发布日期:2023-02-24
通讯作者: 杨迎新,E-mail:yangyx36@163.com
作者简介:杨迎新,1964年生,男,汉族,甘肃永昌人,教授,博士生导师,主要从事钻井岩石破碎学与钻头技术研究。E-mail:yangyx36@163.com
谢松,1996年生,男,汉族,四川南充人,硕士,主要从事钻井装备的研究。E-mail:xs145834@163.com
蔡灿,1988年生,男,汉族,湖北黄梅人,副教授,主要从事钻具设计及高效破岩理论、高压射流理论与新技术、超临界CO₂技术及应用等研究。E-mail:cainia10@163.com
曹煜磊,2000年生,男,汉族,山西阳泉人,主要从事传感器与信号处理方面的研究工作。E-mail:cristowen7@gmail.com
李邦润,1995年生,男,汉族,四川广安人,硕士,主要从事高压射流理论与新技术。E-mail:bangrun2133@163.com,
基金资助:
国家自然科学基金（51504209）；中国博士后第67批面上基金项目（2020M673285）；西南石油大学“启航计划”（2019QHZ009）；中国石油化工集团有限公司横向项目（19-ZC0609-0001）

A Study on the Mechanism and Heat Generation Law of PDC Wear Tooth Cutting

YANG Yingxin^1,2,3, XIE Song^1,2, CAI Can^1,2,3, CAO Yulei¹, LI Bangrun^1,2

1. School of Mechanical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
2. National Engineering Research Center for Oil and Gas Drilling and Completion Technology, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
3. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China

Received:2020-06-04 Published:2023-02-24

摘要/Abstract

摘要： 为探究深部钻井PDC钻头切削齿在磨损状态下的切削破岩过程，选取深部钻井PDC钻头上不同磨损程度的PDC齿开展单齿切削实验，借助应力测试系统、高速摄影机和热红外成像仪分析磨损齿的受力状态、温度变化规律以及岩石裂纹扩展过程。结果表明，与未磨损齿相比，磨损齿所受切削力更大、温度变化更明显，且更易产生大体积岩屑，这将导致钻头在井下振动加剧，磨损急剧加快，严重影响其使用寿命；切削花岗岩时切削力和温度大幅上升的问题更加突出，但更容易发生体积破碎，产生较大块的块状岩屑。研究成果将有助于重新认识真实井底磨损齿切削破岩及温度变化规律，并为钻头设计及井下寿命评估提供重要参考。

关键词: 磨损齿, 单齿切削, 破岩过程, 温度变化, 工作性能

Abstract: To explore the cutting process of deep drilling PDC bit cutting teeth in the wear state, the single tooth cutting experiment is carried out by selecting PDC cutting teeth with different wear degrees on the deep drilling PDC bit. The stress state, temperature change law and crack propagation process are analyzed by stress test system, high speed camera and thermal infrared imager. The results show that the cutting force, temperature change and large volume cuttings are more obvious than the non-wear teeth, which will lead to the outburst of drill bit vibration and the sharp acceleration of wear, seriously affecting its service life. On the other hand, when cutting granite, the problem of cutting force increase and heating up is more prominent, but volume breakage is more likely to happen and produce larger block cuttings. The research results will help to re-understand the rock breaking and temperature variation law of real bottom wear teeth, and provide important reference for bit design and downhole life evaluation.

Key words: wear teeth, single tooth cutting, rock breaking process, temperature change, working performance

中图分类号:

TE921

杨迎新, 谢松, 蔡灿, 曹煜磊, 李邦润. PDC磨损齿切削破岩过程的实验研究[J]. 西南石油大学学报(自然科学版), 2023, 45(1): 180-188.

YANG Yingxin, XIE Song, CAI Can, CAO Yulei, LI Bangrun. A Study on the Mechanism and Heat Generation Law of PDC Wear Tooth Cutting[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2023, 45(1): 180-188.

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PDC磨损齿切削破岩过程的实验研究

A Study on the Mechanism and Heat Generation Law of PDC Wear Tooth Cutting

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