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油气混输泵管道多次出现破漏,造成较大的经济损失与环境污染。割开检查发现底部有一道深深的沟槽,沟槽较窄,棱角分明。研究认为,这种沟槽的形成不是化学腐蚀,也不是材质缺陷,与层流、紊流无关,而是油气混输泵运行产生的一种固有的旋流造成的。由于油井出砂,砂子通过油气混输泵后获得新的能量,在管线内作旋转运动,其运行轨迹先是柱状,后逐渐转变为斜锥状,最后旋流锥尾与管底接触,对管底进行径向切削,从而形成沟槽,这种沟槽长度有限,位置相对固定。除砂或采用局部外加厚管道是解决该问题的主要措施。
Multiple leakage of oil and gas pump pipeline, resulting in greater economic losses and environmental pollution. Cut open the bottom of the discovery of a deep groove, narrow groove, angular. The study suggests that the formation of such grooves is not chemical corrosion, nor is it a material defect, and has nothing to do with laminar flow, turbulence, but an inherent cyclonic flow generated by the operation of the oil-gas mixing pump. Because of oil well sand, sand through the oil and gas mixing pump to obtain new energy, made in the pipeline for rotational movement, the first columnar trajectory, and gradually transformed into a tapered cone, and finally the end of the swirl cone contact with the bottom of the tube, the tube At the end of the radial cutting, resulting in the formation of grooves, the groove length is limited, the position is relatively fixed. Sand removal or the use of local thickening pipe is the main measure to solve the problem.