【摘要】 钻铤接头因应力集中和受钻井液腐蚀而引起应力疲劳和腐蚀疲劳,在公接头螺纹根部产生应力腐蚀疲劳断裂。为提高钻铤使用寿命,可对接头根部螺纹进行冷滚压,提高其疲劳强度,也可在钻铤接头处涂防腐剂,提高其抗腐蚀疲劳能力。更多还原

【Abstract】 The authors discuss the fracture at the root part of thescrew thread of drill--collar pin sub caused by stress concen-tration and drilling--fluid corrosion, holding that cold rollingand application of preservative agent are two ways to heigh-ten the anticorrosion fatigue strength for longer service life.更多还原