直井油管柱有重始弯压力研究  

RESEARCH ON VERTICAL WELL TUBING STRING BENDING WITH RESTART BENDING PRESSURE

作　　者：李钦道[1] 张娟[1] 邹波[1] 杜济明[1] 吴怡[1] 

机构地区：[1]川庆钻探工程有限公司钻采工程技术研究院

出　　处：《钻采工艺》2011年第6期16-19,6,共4页Drilling & Production Technology

摘　　要：直井油管柱无重始弯压力问题已在文献[1]讨论,但是由于油气井中的油管柱弯曲都是有重弯曲,直井油管柱无重始弯压力还不能直接在油气井油管柱弯曲中应用,因此需要在直井油管柱无重始弯压力公式基础上得出直井油管柱有重始弯压力公式。文中先介绍油管柱有重弯曲概念,其次对油管柱无重弯曲和有重弯曲的特征进行对比,再次介绍有重弯曲和无重弯曲始弯压力之间的关系,介绍弯曲段上端处的压力,最后对完全自重弯曲长度,无重弯曲条件和无重弯曲极限长度,直井油管柱的几种弯曲形式等进行讨论。The problem of straight well tubing string without restart bending pressure has been discussed in literature, but as a result of that the tubing string bending are heavily curved in oil and gas well, straight well tubing string without restart bending stress is not directly applied to the oil well tubing string bending, thus the formula of vertical well tubing string bending with restart pressure was derived based on the formula of the straight well tubing string without restart bending stress. This paper first introduced the concept of the tubing string with restart bending pressure, then, the features of tubing without heavy bending and with heavy curved were compared, the stress relationship between the heavy bending and the without heavy bending and the pressure at the upper end of the bending section ware also introduced, finally, the deadweight bending curve length, bending conditions without weight and the limit length of without heavy bending, the bending forms of the straight well tubing string were discussed.

关 键 词：直井 有重管柱 有重始弯压力 无重弯曲条件 弯直界面压力 

分 类 号：TE931[石油与天然气工程—石油机械设备]