基于ANSYS的大尺寸割缝筛管布缝参数设计

Slotting Parameters Design of the Large Size Slotted Liner Based on ANSYS

根据油井防砂及产量要求,设计大尺寸割缝筛管替换小尺寸筛管,并使其与小尺寸筛管的强度相当。建立了割缝筛管受力分析的有限元模型,对177.8 mm(7 in)割缝筛管进行应力校核,确定177.8 mm筛管在拉伸、压缩和径向挤压3种载荷下的局部应力最大值,并将其作为244.5 mm(9in)筛管的设计参照值。在同时满足拉伸、压缩和径向挤压3种载荷条件下,大尺寸割缝筛管若采用交错布缝方式,最大周向缝数为73条,若采用平行布缝方式,最大周向缝数为70条。经现场验证,设计结果满足油田产量和强度要求,保证了油气井安全高效生产。

According to the oil well sand control and production requirements, the large size slotted liner with the same strength of small size slotted liner has been designed to replace the small size slotted liner?The finite ele?ment analysis model of slotted liner stress has been established for the ?177?8 mm ( 7 in ) slotted liner stress check?The maximum local stress of 7 in slotted liner has been determined under the loads of tensile load, compres?sive load and radial extrusion load, and is set as the reference value of ?244?5 mm (9? in) slotted liner de?sign?Given the premise of meeting the requirement of the tensile load, compressive load and radial extrusion load, for the large size slotted liner, the maximum number of circumferential slots would be 73 for interlace?arranged slot, while the maximum number of circumferential slots would be 70 for parallel arranged slot?The field tests have proven that the slotted liner design could meet the oil production and strength requirements, ensuring the safe and efficient production of oil and gas wells.