钻屑回注泵液力端有限元分析

Finite Element Analysis of Hydraulic End of Cuttings Reinjection Pump

岩屑回注技术是有效处理钻井废弃物以及消除其对环境影响的重要手段。但由于岩屑回注浆体中含有大量微小颗粒,在回注过程中对于回注泵液力端的磨损较大,导致岩屑回注泵寿命较短。为此,通过ANSYS数值模拟软件的FLOTRAN CFD模块分析液力端内的流场分布,分析发现:吸入工况下,流体流经吸入凡尔时流道过流面积最小,所形成的流速最高;排出工况下,流体在排出凡尔左侧壁面形成最大流速,且在出口附近产生漩涡。液力端基体材料采用沉淀硬化性不锈钢合金,延长了液力端凡尔周围材料的耐磨性,延长回注泵使用寿命。

Cuttings Reinjection Technology is an important means to effectively manage drilling waste and eliminate its impact on the environment.However,because there are a lot of small particles in the drilling cuttings reinjection slurry,the wear of the fluid end during the reinjection process is large,resulting in a short service life of the drilling cuttings reinjection pump.Therefore,the flow field distribution in the fluid end is analyzed through the FLOTRAN CFD module of ANSYS numerical simulation software,and it is found that:Under the suction condition,when the fluid flows through the suction valve,the flow area of the passage is the smallest and the flow rate is the highest;Under the discharge condition,the maximum flow velocity is formed on the left wall of the discharge valve,and a vortex is generated near the outlet.The base material of the hydraulic end adopts precipitation hardening stainless steel alloy,which extends the wear resistance of the materials around the valve at the hydraulic end and prolongs the service life of the reinjection pump.