Study of an engineering method for fatigue life estimation and safety evaluation of well drilling string

Conference · Sun Dec 31 00:00:00 EST 1995

OSTI ID:176124

Zengjie, Deng; Yi, Zhang; Helin, Li ^[1]; Zhonghua, Li ^[2]

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1. China National Petroleum Corp., Xi`an, Shaanxi (China). Tubular Goods Research Center
2. Xi`an Jiaotong Univ., Xi`an, Shaanxi (China)

In this paper, an engineering method for calculating the loading capacity, predicting the residual life, making the safety evaluation of drilling pipe and connection joint based on fracture mechanics was presented. The stress intensity factors K{sub I}, K{sub II} and K{sub III} at the critical sections were calculated by means of 3D FEM, then the fracture toughness J{sub c} under mixed mode loading of drilling pipe steel 37Mn5 and 4340 was obtained. In addition, the tests of fatigue crack initiation under different stress concentration state and fatigue crack growth performance of the same steel were carried out, and corresponding expressive formulae were researched.

• OSTI ID: 176124
• Report Number(s): CONF-950740-; ISBN 0-7918-1346-0; TRN: IM9606%%267
• Resource Relation: Conference: Joint American Society of Mechanical Engineers (ASME)/Japan Society of Mechanical Engineers (JSME) pressure vessels and piping conference, Honolulu, HI (United States), 23-27 Jul 1995; Other Information: PBD: 1995; Related Information: Is Part Of Fitness-for-service and decisions for petroleum and chemical equipment. PVP-Volume 315; Prager, M.; Becht, C. IV; Depadova, T.A.; Okazaki, M.; Onyewuenyi, O.A.; Smith, J.P.; Takezono, S.; Weingart, L.J.; Yagi, K. [eds.]; PB: 560 p.
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
DRILL PIPES
SERVICE LIFE
STRESS ANALYSIS
SAFETY ANALYSIS
FINITE ELEMENT METHOD
FRACTURE PROPERTIES
CRACK PROPAGATION
MANGANESE STEELS