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A novel thread connection structure of slimehole drilling tool in ultra-deep natural gas well

Zhang, Y; Lian, ZH; Gao, AQ; Yang, K

Zhang, Y (corresponding author), Sichuan Univ Sci & Engn, Sch Mech Engn, 519 Huixin Rd, Zigong 643000, Peoples R China.

SCIENCE PROGRESS, 2021; 104 (2):

Abstract

The thread connection's root fillet radius of 0.038 '' size is the greatest weakness of the API NC type joints and thread. During the slimehole drilli......

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