id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
ajst-30166	Zhang, Junming; Dong, Liangliang	Double Shoulder Thread Mechanics Study and Life Analysis of Drilling Tools	2025	8	.pdf	application/pdf	3806	148	58	Fatigue life cloud under double shoulder thread torque Fig.12 shows the cloud diagram of the number of fatigue cycles of double shoulder structure threads under 40kN·m, 50kN·m and 60kN·m torsional loads. Application status and interchangeable use analysis of double shoulder drill pipe threads.	cache/ajst-30166.pdf	txt/ajst-30166.txt