深水水上防喷器钻井系统高压套管隔水管强度分析  

STRENGTH ANALYSIS OF THE HIGH-PRESSURE RISER OF SURFACE BLOWOUT PREVENTER SYSTEM FOR DEEPWATER DRILLING

作　　者：苏堪华[1] 管志川[2] 刘继林[1] 

机构地区：[1]重庆科技学院石油与天然气工程学院 [2]中国石油大学石油工程学院.华东

出　　处：《钻采工艺》2013年第2期80-83,10,共4页Drilling & Production Technology

基　　金：国家自然科学基金项目"深水钻井隔水管动力作用下的套管柱与海底浅部软土间的相互作用机理研究"(51004119);重庆市教委科学技术研究项目"深水钻井无隔水管环境下的钻柱动态响应研究"(KJ121416);2011年首批重庆市高等学校青年骨干教师资助计划"深海无隔水管钻井系统的钻柱运动与受力特性研究"

摘　　要：深水水上防喷器钻井系统已得到一定程度的现场应用,可节省作业费用。但由于该系统具有采用高压小直径套管代替常规大直径隔水管、防喷器组放置水面以上采用应力短节缓解高压隔水管应力等特点,需要分析高压隔水管的强度。根据材料力学理论,建立了高压隔水管的准静态力学分析模型和内外压力计算模型。通过对高压隔水管的力学性质及内外压强度的分析发现,高压隔水管的下部应力节底部的偏移程度对隔水管的弯曲变形和弯曲应力影响不大;在选择应力节时,上部应力节的转动刚度可以小于下部应力节的转动刚度;在高压隔水管内压强度设计时应重点考虑高压隔水管接近海面段所受到的等效内压力,在该段提高管材钢级或增大壁厚。The surface blowout preventer (SBOP) system has been applied and could save operation cost. However,the system adopts a high pressure small diameter casing to replace the conventional riser and the BOP stack,and the upper and lower stress joints are used to reduce the stress concentration of the high pressure riser. According to the theory of mechanics of materials,the quasistatic mechanical model and the internal and external pressure calculation model of high pressure riser were established. Through analysis of mechanical property and internal and external pressure strength of high pressure riser,the results indicated that the lateral displacement of lower stress joint has slightly influence on the deflection and bending stresses of the high pressure riser. The rotational stiffness of the upper stress joint could be less than the lower stress joint. The strength design of internal pressure should consider the equivalent interior pressure of the segment which close to the sea level,and increase the steel grade or wall thickness of the high pressure riser.

关 键 词：深水钻井 高压套管 隔水管 强度分析 

分 类 号：TE951[石油与天然气工程—石油机械设备]