1. Nguyen TC, Al-Safran E, Nguyen V (2018) Theoretical modeling of positive displacement motors performance. J Pet Sci Eng 166:188–197
2. Yuyang X (2018) Development and field application of positive displacement motor with equal wall thickness. Pet Chem Equip 21:No.178(04):15–16 + 19
3. Yang L, Lujun B, Xue J (2012) Development and field test of screw drilling tools with equal wall thickness. Pet Drill Technol 02:109–112
4. Zhu X, Hua T, Hongchao Z, Jiqing H, Linxian F (2007) Evaluation of mechanical characteristics of screw drilling tool drive shaft. Pet Drill Technol 35(001):56–58
5. Chuanjun H, Yaling Q, Qingyou L, Wang G (2008) Analysis of the performance of bushings with constant wall thickness of positive displacement motor. J Southwest Pet Univ (Nat Sci Ed) 30(004):163–165