Mechanical analysis of packer anchoring slip

Introduction

The mechanical analysis of packer anchoring slips is crucial for ensuring the reliability and performance of packers in oil and gas wells. The slips are essential components that anchor the packer to the casing, providing support and sealing capabilities under various operational conditions. This synthesis presents key insights from multiple research papers on the mechanical behavior, stress distribution, and optimization of packer slips.

Key Insights

Performance and Reliability of Packer Slips:
- The performance of packer slips directly affects the anchor reliability and sealing performance of the packer. Laboratory tests and numerical simulations show that a setting load of 30MPa provides a good anchor effect, with consistent fracture morphology between tests and simulations.
- The capability of slips influences oil well yield and productive safety. Proper distribution of occlusive force between slip and sleeve is crucial for the success of the packer.
Contact Stress and Interaction with Casing:
- The interaction force between the slip and the casing is critical for the supporting function of the slip. The biting depth of the slip increases with load, and more teeth reduce the biting depth and stress on the teeth .
- The depth of slip bite into the casing is generally about 0.5mm to 0.7mm, and the load on the slip elements increases with axial load while decreasing with the number of slip elements .
Stress Analysis and Structural Optimization:
- Finite element analysis reveals that the maximum stress on slips can exceed the material's compressive strength under high loads, necessitating structural optimization. A tooth spacing of 30mm provides a uniform stress distribution and higher load capacity.
- The contact force between slips and casing in high-pressure, high-temperature (HPHT) wells is analyzed to ensure the slips do not damage the casing. Proper material selection and design are essential for maintaining the integrity of both slips and casing.

Conclusion

The mechanical analysis of packer anchoring slips highlights the importance of optimizing slip design and material selection to ensure reliable performance under various operational conditions. Proper distribution of occlusive force, understanding the interaction between slips and casing, and structural optimization are key factors in enhancing the reliability and safety of packers in oil and gas wells.

Mechanical analysis of packer anchoring slip

Summary

Introduction

Key Insights

Conclusion

Sources and full results

Application and Analysis of Fracture Simulation of the Slip of the Permanent Packer

The study combined laboratory tests and numerical simulation to improve the slip performance of the permanent packer, enhancing anchor reliability and slip fracture morphology consistency.

A Study on Contact Stress of Packer Slip

The study analyzes the contact stress of packer slips using finite-element method and 3-D photoelastic technique, providing valuable information for optimum design and oil well yield.

Analysis of Interaction between HTHP Completion Packer's Slip and the Casing Wall

The HTHP completion packer's slip has a biting depth of 0.5mm-0.7mm, with tooth stress gradually decreasing and slip biting depth increasing with load, ensuring the packer's reliability.

The Strength Analysis and Structure Optimization of Packer Slip Based on ANSYS

The optimal spacing size of slip tooth is 30 mm, resulting in uniform stress distribution and a maximum load of 240kN for packer slips in oil field applications.

Analysis of the Interaction between Casing and Completion Packer Slip in HPHT Wells

The bite depth of completion packer slips in HPHT wells is generally about 0.7 mm, and the load acted on slip elements tip increases with axial load acted on the cone, while slip elements number decreases.

Casing failure mechanism and slip anchoring optimization of the compression packer in the oil and gas well

Optimizing the top angle, tooth space, and tooth number of compression packer slips can significantly reduce casing damage and increase their working life in oil and gas wells.

Analysis of the slip of a packer using the finite element method

The slip packer's friction shoe type can withstand a maximum fracturing pressure of 450 MPa, based on its operation principle and slip structures.

Research on Prediction and Optimization Design Method of Slip Anchoring Performance Based on BP&NSGA-II

The study developed a prediction model for slip anchoring performance, improving efficiency and accuracy in designing and testing slips.

Contact Analysis between Packer Slips and Casing Based on Abaqus

Optimal design of packer slips can improve oil yield and production safety by analyzing the contact between packer slips and casing using Abaqus software.

Development of a Mechanical Wedge–Barrel Anchor for CFRP Rods: Static and Fatigue Behaviors

The mechanical wedge-barrel anchor for CFRP rods has a higher tensile strength than the guaranteed value, is insensitive to loading frequency, and can apply presetting forces greater than 110 kN.

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