钻杆接头抗扭强度及材料韧性指标研究——系列专题之八  

Study of the torsion strength and material toughness criteria of drill pipe tool joint

作　　者：王新虎[1] 薛继军[1] 谢巨良[2] 李怀仲[2] 

机构地区：[1]中国石油天然气集团公司管材研究所 [2]塔里木油田分公司工程技术部,新疆库尔勒841000

出　　处：《石油矿场机械》2006年第z1期1-4,共4页Oil Field Equipment

摘　　要：近年来由于深井、定向井等逐年增多,钻杆内螺纹接头纵裂破坏成为常发事故。钻杆接头的各种纵向开裂属于低应力脆性断裂。当接头横向材料韧性不足时,任何表面损伤及缺陷如摩擦热裂纹等,都可作为裂纹源向纵深扩展。应用失效评估图技术估算表明,横向材料V型缺口夏比试样室温冲击功大于100J时,将显著减少钻杆内螺纹接头纵裂破坏,失效案例统计数据验证了这一结果。Due to the numbers of deep well and directional well creasing,longitudinal crack of drill pipe box joint often happen.Longitudinal crack of drill pipe box joint is brittle fracture at low stress.When trans- verse material toughness is low,some damages and flaws on the surface of drill pipe tool joint may expand. It is found that 100J Charpy impacts energy of transverse material at room temperature may decrease the longitudinal crack of drill pipe box joint.Failure cases analysis prove the result.

关 键 词：钻杆接头 纵向开裂 抗扭强度 材料韧性 

分 类 号：TE921.201[石油与天然气工程—石油机械设备]