海上平台有杆采油的液压抽油机设计
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摘要
针对海上稠油热采及低产油井开采需要,提出海上平台有杆采油的新工艺;基于海上平台结构空间限制,设计一种新型长冲程、低冲次、结构紧凑的小型液压抽油机。阐述抽油机的整体结构和工作原理,建立悬点载荷的数学模型,基于压杆稳定性确定组合液压缸的结构尺寸,运用Timoshenko梁分析理论分析3种工况下机架的变形量和应力值,并加工等比例实验室模型样机。分析结果表明:抽油机具有较好的刚度和强度;模型样机运转平稳,说明其整体结构设计合理、控制策略正确。
A new technology about rod pumping in offshore platform is introduced according to the demand of offshore heavy oil thermal recovery and the production of stripper well.A new kind of miniature hydraulic pumping unit with long-stroke,low pumping speed and compact structure is designed to resolve the problem of space limitation.The whole structure and the working principle of this pumping unit are described.Mathematical models are modeled based on the polished rod loads,and the structure and size of composite hydraulic cylinder are determined considering for compression bar's stability.The deformation and stress of the frame are analyzed by Timoshenko software,and the laboratory scale model prototype is also prepared.The test result shows that the hydraulic sucker rod pumping unit has better stiffness and strength.The model prototype runs smoothly which indicates that the whole structure design of pumping unit is reasonable and the control strategy is correct.
A new technology about rod pumping in offshore platform is introduced according to the demand of offshore heavy oil thermal recovery and the production of stripper well.A new kind of miniature hydraulic pumping unit with long-stroke,low pumping speed and compact structure is designed to resolve the problem of space limitation.The whole structure and the working principle of this pumping unit are described.Mathematical models are modeled based on the polished rod loads,and the structure and size of composite hydraulic cylinder are determined considering for compression bar's stability.The deformation and stress of the frame are analyzed by Timoshenko software,and the laboratory scale model prototype is also prepared.The test result shows that the hydraulic sucker rod pumping unit has better stiffness and strength.The model prototype runs smoothly which indicates that the whole structure design of pumping unit is reasonable and the control strategy is correct.
引文
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[3]徐兵,黄方平,张斌.新型节能变频闭式液压抽油机的设计[J].机床与液压,2006,34(01):72-74.
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[5]郭永华,周心怀,李建平,等.渤海海域新近系稠油油藏原油特征及形成机制[J].石油与天然气地质,2010,31(03):375-380.
[6]刘鸿文.材料力学[M].北京:高等教育出版社,2011.
[7]臧克江.液压缸(实用液压技术丛书)[M].北京:化学工业出版社,2010.
[8]邸元,陈红火,胡镇仕.风荷载作用下某钢管火炬塔架的有限元分析[J].特种结构,2012,29(05):56-59.