热采水平井新型套管热力补偿器

现有热采水平井套管补偿器开启压力若设置过大,套管会因补偿器开启不及时而损坏,若开启压力设置过小,又易在完井过程中提前开启。为此,开发了SCYRB型热力补偿器。该补偿器采用温敏式材料来做补偿器的开启装置,常温时补偿器处于锁死状态,管柱在轴向无法伸缩;当温度达到设定值时,补偿器为开启状态释放管柱,使补偿器两端管柱处于可以自由伸长状态,通过补偿管柱轴向伸长量的方式达到降低应力集中、保护管柱的目的。目前,该补偿器已推广应用40～50套,工作正常,尚未发生完井管柱破损事故,成功率达到100%。

The Neotype Casing Thermodynamic Compensator for Thermal Recovery Horizontal Wells

If the startup pressure of the existing casing compensator is too high,the casing will be damaged due to the untimely startup of the compensator.If the startup pressure is too low,the startup will be conducted ahead of time in the process of well completion.Considering the problem,Model SCYRB thermodynamic compensator was developed.The compensator adopts temperature-sensitive material as the startup device,and it is in the state of dead lock in normal temperature,preventing the string from stretching out axially.When the temperature value reaches the set value,the compensator is in the open state to set free the string,keeping the strings at both ends of the compensator in free extension.The purpose of reducing stress concentration and protecting the string is reached by compensating the extension of the string.Currently,40 to 50 compensators of this kind have been spread and applied.No completion string has so far been damaged.