High compressive strength TP140V high grade casing has been used in Shengli Oilfield to avoid de-formation of downhole casing.However,when the TP140V high grade casing deforms,it has high rebound rate,the conventional shaper is easily stuck.The split shaper can effectively avoid the above problem.Taking the TP140V high grade necking casing with a wall thickness of 9.17 mm and an outer diameter of 139.7 mm(5.5 in)as the research object,the finite element simulation and laboratory test combination method was used to explore the influence of friction factor,single shaping amount and casing material on the shaping of split shaper.The research results show that as the friction factor between the casing and the split shaper increases,the maximum repair force also increases,approximately in a linear relationship.When the single shaping amount is small,the repair force required for shaping is small and the change in repair force is stable.The single shaping amount is recommended to be 2 mm.The higher the yield strength of the casing material,the greater the repair force of shaping,the smaller the repair amount,and the greater the necking degree of the deformed casing,the more obvious the changes are.The conclusions provide theoretical guidance for the field operation of split shapers.
high grade casingsplit shapernecking deformationrepair forcesingle shaping amountfriction factorextensibility
万方数据
维普
