不同载荷作用下外包覆保温油管隔热性能试验研究  

Experimental Research on Thermal Insulation Performance of Outer Clad Thermal Insulation Tubing under Different Loads

作　　者：董宗豪 谢南星 路彩虹 DONG Zonghao;XIE Nanxing;LU Caihong(Engineering Technology Research Institute,PetroChina Southwest Oil and Gas Field Company,Chengdu,Sichuan 610031,China;CNPC Tubular Goods Research Institute,Xi′an,Shaanxi 710077,China)

机构地区：[1]西南油气田分公司工程技术研究院,四川成都610031 [2]中国石油集团工程材料研究院有限公司,陕西西安710077

出　　处：《石油管材与仪器》2024年第2期36-40,46,共6页Petroleum Tubular Goods & Instruments

基　　金：中国石油天然气集团有限公司科学研究与技术开发项目“井筒完整性关键理论与控制技术”(编号:2021DJ4403)。

摘　　要：保温油管在稠油蒸汽注采、高含蜡油田防蜡、气井天然气水合物解堵中具有广泛的应用。利用油/套管柱非均匀加载试验装置和热循环温度监测系统,对全尺寸外包覆保温油管(简称保温油管)进行拉伸、弯曲、外压试验后的隔热性能对比试验,研究了不同服役载荷对保温油管隔热性能影响的主控因素。结果表明:保温油管下深2000 m内,拉伸、弯曲载荷下,外包覆保温油管内管和外管无相对滑动或脱落;随着外压载荷的增大,保温油管的变形程度增大;在水介质中未加载情况下,从100℃初始温度开始,20 min时,保温油管与P110油管温差达到最大值55.4℃,此时油管的温度降幅为保温油管的4.7倍;在空气中不同载荷作用下,初始温度为100℃,20min时,保温油管保温效果均稍有降低,最大温差为3.5℃,载荷对保温油管隔热性能影响大小的排序为:外压>弯曲>拉伸。Thermal insulation tubing has a wide range of application in exploitation of heavy oil,prevention wellbores form wax deposition,as well as gas hydrate plugging removal in gas well.In this paper,using the tubing/casing string loading experimental device and the thermal cycle temperature monitoring system,the tensile,bending and external pressure tests of the full-size outer clad insulation tubing(referred to as the insulation tubing)and its thermal insulation performance in different media are carried out.The main controlling factors of the influence of different service loads on the thermal insulation performance of insulation tubing were studied.The results show that within 2000 m depth of that of the thermal insulation tubing down from the well,tensile and bending loads in service cannot cause relative slip between the outer and inner tubes of the thermal insulation tubing.With the increase of the external pressure,the deformation of the thermal insulation tubing increases.From an initial temperature of 100℃,when there is no external load in the water,the temperature difference between the thermal insulation tubing and the P110 tubing reaches the maximum value of 55.4℃within 20 minutes.At this time,the temperature drop of the P110 tubing is 4.7 times of that of the thermal insulation tubing.Under various loads in the air with the initial temperature of 100℃,the insulation effect of the insulation tubing is only slightly reduced within 20 min,and the maximum temperature drop is 3.5℃.The order of the influence of different loads on the thermal insulation performance is external pressure>bending>tensile.

关 键 词：外包覆隔热油管 不同载荷作用 隔热性能 

分 类 号：TE345[石油与天然气工程—油气田开发工程]