深井和超深井使用的TP140V高钢级套管对封隔器卡瓦的锚定稳定性提出了更为严格的要求。为此，基于力学平衡并结合套管抗外挤压强度推导了卡瓦锚定稳定性评价数学模型，明确了卡瓦嵌入套管具有稳定性的深度范围；应用有限元法开展了不同卡瓦结构参数下套管和卡瓦力学行为分析。研究结果表明：增大卡瓦基体倾角、齿边距和齿间，减小缸体角度可以有效提高卡瓦齿嵌入套管的均匀性；卡瓦应力与卡瓦倾角、齿直径、齿边距呈正相关，与齿体倾角、缸体角度呈负相关，卡瓦设计时可以根据此规律选取合适的值增大卡瓦基体承载能力；卡瓦基体斜面底部是镶嵌齿卡瓦的易损点，应作为卡瓦失效重点监测位置。研究结果可为高钢级套管内镶嵌齿卡瓦结构设计提供理论依据和指导。

The use of TP140V high-grade steel casing in deep and ultra-deep wells imposes more stringent requirements on the anchoring stability performance of packer slips. To address this, a mathematical model for evaluating the anchoring stability of slips was derived based on mechanical equilibrium and the casing's resistance to external collapse strength, clarifying the depth range within which the slip embedding into the casing remains stable. Finite element analysis was employed to investigate the mechanical behavior of the casing and slips under different slip structural parameters. The research results indicate that increasing the slip body inclination angle, tooth edge distance, and tooth spacing, while reducing the cylinder angle, can effectively improve the uniformity of slip teeth embedding into the casing. The stress on the slips is positively correlated with the slip inclination angle, tooth diameter, and tooth edge distance, and negatively correlated with the tooth body inclination angle and cylinder angle. These relationships can guide the selection of appropriate values to enhance the load-bearing capacity of the slip body during slip design. The bottom of the slip body is a vulnerable point for slip teeth and should be a key monitoring location for slip failure. The findings provide theoretical basis and guidance for the structural design of slip teeth embedded in high-grade steel casings.