Feasibility Study On Completely Packer Sealing System And Slip Sleeve

The increasing oil and gas demand, the world’s oil and gas resource development gradually deepened. The exploitation of unconventional oil and gas resources, such as shale oil and gas, more and more exploiting becomes increasingly difficult. In the exploiting process, the packer sealing system structure is irrational, cones anchor bad ability is easy to slip, especially sealing component failure, packer cones being squeezed on both sides Packer sealing failure to exploiting process brought great harm, if not effectively prevent the failure of a series of cones protruding shoulder problem, which not only increases the total exploiting time, also will result in the loss of expensive downhole tool performance and engineering accident caused even scrapped so well, result in great economic losses to the oil companies. Therefore, measures must be taken to reduce or even eliminate the packer failure, and between the packer installing soft metal copper cones Shoulders to reduce packer failure is one of the most effective measures.Based on the existing fracturing packer and the study of staged fracturing packer, and its structural design, based on contact nonlinear theory, use of ABAQUS finite element analysis software, to establish fracturing packer cylinder, lock sets, the next cylinder dimensional finite element model was proposed structural optimization method based on the design of the cylinder, the cylinder wall transitional step analysis, hydraulic force area, from both sides of the ring structure parameters packer on the cylinder, the locking sleeve, the performance of the cylinder barrel.In fracturing packer tube sealing for the study, based on rubber Yeoh model theory, the constitutive relation curve fitting150°under cones, and analyses the influencing factors sealing performance, the establishment of a nonlinear axisymmetric contact model, proposed structural optimization method based on packer rubber tube designed to analyse the packer pressure, soft metal shoulder thickness, the impact of the casing thickness of the fracturing packer sealing system. According fracturing conditions required, based on the metal damage theory, a3D finite element model of the shear pins, shear pins needed for sleeve to simulate and calculate the impact of different open pressure on the sleeve mechanical properties of shear pins conducted a preliminary exploration.This paper carried out on Packer-sleeve work numerical simulation tools for guiding packer and sleeve design, promoting fracturing tool failure prevention is important.