分支井雙管封隔器膠筒密封性能研究

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中圖分類號(hào)：TE931.2 文獻(xiàn)標(biāo)志碼：A doi：10.3969/j.issn.1001-3482.2025.04.005

SealingPerformanceofDual TubingPackerRubberinBranchHoles

XU Jing， MA Lei， YANG Junlong， HAN Cheng， CAO Feng （Zhanjiang Branch， CNOOCChina Co.，Ltd.， Zhanjiang 524057，China）

Abstract：Inorder to study thesealing failure of dual tubing packersand reduce the packer failure accident in branch holes，the dual tubing packer rubber in branch holes was studied，and the sealing process of dual tubing packer rubber was simulated by finite element software.The effective sealing coeffcient was proposed to evaluate the sealing performance of the rubber.In addition，the sealing performance of cylindrical，butterfly，and wedge rubbers was studied from the aspects of rubber hardnessand friction coeficient.The results show that the established finite element model can effectively simulate the sealing processof the packer rubber. The comparison with the experiment reveals that the model can meet the engineering requirements. The circumferential contact pressure distribution of the dual tubing packer rubber is not uniform，which will lead to local pressure concentration and reduce the overall sealing performance.A greater rubber hardness and greater friction coefficient mean lower sealing performance. The wedge -shaped rubber scheme involves a certain rubber overlap，which can improve the influence of hardness and friction coefficient on the sealing to acertain extent，with optimal relative effect.The research results can provideareference for the design of a dual tubing packer.

Key words：branch hole; dual tubing packer; rubber; sealing performance; finite element

分支并技術(shù)在保留原有并眼的條件下，開窗側(cè)鉆出新井眼，實(shí)現(xiàn)多井眼接觸油藏，最大限度地減少新鉆井對(duì)油藏的影響，尤其當(dāng)海上油田槽位可用性有限時(shí)，與多口單井相比，分支井系統(tǒng)節(jié)省了工程開發(fā)時(shí)間，降低了建井成本，得到廣泛應(yīng)用[1-3]。（剩余6603字）