空气钻井钻柱波动响应规律研究

Research on wave motion response of drill string for air drilling

张文波 2 罗增² 林元华¹ 刘颖彪² 路宗羽²

西南石油大学油气藏地质及开发工程国家重点实验室，四川 成都 610500 中国石油新疆油田公司勘探开发研究院，新疆 克拉玛依 834000

State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China Research Institute of Exploration and Development, Xinjiang Oilfield Company, PetroChina, Karamay 834000, China

空气锤钻井具有提高机械钻速、减少储层伤害以及降低钻井成本等优势，因而在国内外各大油田得到广泛应用。而高速冲击的空气锤产生的应力波既有破岩作用，又对钻柱产生了一定程度的损伤，极易导致钻柱失效。文中根据应力波传播理论，对高速冲击工况下产生的应力波进行了模拟研究，求解出了波动响应随时间变量在钻柱中的传播规律，为研究应力波的破坏机理奠定了基础。

Air hammer drilling technology is widely used in domestic and overseas oilfield because it has the advantages of improving drilling rate, reducing the damage of fracturing fluids to the reservoir and reducing drilling cost. However, the stress wave from the high speed impact air hammer has the role of breaking the rock, also has certain damage on drill string. Based on the stress wave theory, this paper simulates and studies the stress wave from the air hammer, and find the principle of wave motion response by time variable on drill string, which lay the foundation for researching the deterioration mechanism of stress wave.

10.6056/dkyqt201206032