摘要
塑料内衬油管的塑料管在高温下会伸长,导致该塑料管损坏,油管报废。建立了管柱受外力和温度变化情况下塑料管的应力分析模型,分别对20℃和80℃条件下制造的塑料内衬油管进行塑料管的内应力分析。在20℃条件下生产的塑料内衬油管,通过油井内高温的作用,塑料管处于压应力状态,从油井内提出时会发生伸长现象;在80℃条件下生产的塑料内衬油管,其塑料管处于拉应力状态,从油井内提出时不会发生伸长现象。因此,钢材和塑料性质差异、地面和油井内温度差异是造成塑料管伸长的主要因素。利用塑料的记忆特性,采取预应力技术加工塑料内衬油管,能够解决塑料管伸长的问题。
The plastic pipe of the plastic lined tubing elongates at high temperature,this phenomenon will lead to plastic pipe destroyed and even tubing scrapped.Plastic tubing stress analysis model was established under the external forces and temperature variations.The stress analysis model is used to analyze the plastic lined tubing,which is made under the 20℃and 80℃conditions.The plastic tubing made under the 20℃is in compressive stress by the high temperature effect in the well,the elongation phenomenon occurs when it is taken out from the well.However,the plastic tubing made under the 80 ℃is in tensile stress in the well,elongation phenomenon does not occur when it is taken out from the well.Therefore,the steel and plastic nature difference and the temperature difference between on the ground and in the well are the main factors of plastic pipe elongation.Using plastic memory characteristic and taking the prestressed technology to processing plastic lined tubing can solve the problem of plastic pipe elongation.
出处
《石油矿场机械》
2014年第8期61-64,共4页
Oil Field Equipment
关键词
油管
塑料管
伸长
预防措施
tubing
plastic pipe
elongation
preventive measure
