Calculation method for bearing capacity envelope line of packer in oil and gas development

Abstract

The invention provides a calculation method for a bearing capacity envelope line of a packer in oil and gas development. The calculation method comprises the steps that key structure design parameters, material performance information and a safety coefficient of a mandrel are obtained; according to the key structure design parameters, the material performance information and the safety coefficient, determining a limit point of a to-be-obtained bearing capacity envelope; determining a sketch of the to-be-acquired bearing capacity envelope line according to the limit point; and arranging the sketch of the to-be-obtained bearing capacity envelope according to the safety coefficient to obtain the bearing capacity envelope. In conclusion, according to the method, the bearing capacity envelope of the packer can be efficiently calculated, so that the problem that use and maintenance of the packer can be seriously affected due to the fact that the calculation process of the bearing capacity envelope is unknown can be solved. The achievement has important theoretical guiding significance and engineering value for autonomously designing a novel packer, understanding and decrypting the actual bearing capacity of a high-end imported packer lacking theoretical description and the like.

Description

technical field [0001] The present application relates to the technical field of downhole equipment for oil and gas production in oil and gas fields, and in particular to a calculation method for the envelope of the bearing capacity of packers in oil and gas development. Background technique [0002] Oil and gas well packers for high-temperature, high-pressure deep wells are the core equipment in downhole equipment for oil production. The envelope of the packer’s bearing capacity is an important When the capacity envelope is within the range, the integrity of the packer can be guaranteed. [0003] However, in actual production and life, the packer manufacturer only provides the envelope of the packer’s bearing capacity and the allowable load range, but does not provide the calculation process of the envelope of the bearing capacity, resulting in Unexpected damage to the designed safety string system and construction parameters will occur. In addition, the verification of t...

AI Technical Summary

Problems solved by technology

[0005] This application provides a calculation method for the envelope of the packer's bearing capacity in oil and gas development, which can solve the problem that the unknown calculation process of the envelope of the bearing capacity will seriously affect the use and maintenance of the packer

Images