摘要
在开展地源热泵钻井施工阶段,受复杂地质条件的影响,施工井孔的稳压性能相对偏低。为此,提出了复杂地质条件下地源热泵钻井施工技术研究。以某地源热泵工程为研究对象,在详细勘察了解现场地形、地貌、地质构造等信息的基础上,设计了包括钻井直径、深度、孔距等参数的施工方案,并对具体的施工设备加以选择;利用600 L型钻机进行打孔施工时,借助DSAY40052型潜孔锤将160 mm锰铬合金钢套管下放至30~40 m深度后,采用冲击器冲击凿岩至122 m,利用潜孔锤的冲击压力完成基岩层打孔,同时由空气压缩机提供高速高压空气流,排出基岩层碎片结构。在验收结果中,随着试验压力的逐渐增加,对应的压力波动幅度呈逐渐增大的趋势,且具体的波动强度始终稳定在2%以内,具有良好的稳压性能。
During the construction phase of ground source heat pump drilling,the pressure stabilization performance of the construction wellbore is relatively low due to the influence of complex geological conditions.Therefore,research on ground source heat pump drilling construction technology under complex geological conditions has been proposed.Taking a ground source heat pump project as the research object,based on a detailed investigation and understanding of the terrain,landforms,geological structures,and other information on site,a construction plan including drilling diameter,depth,hole spacing,and other parameters was designed,and specific construction equipment was selected.When using a 600 L drilling rig for drilling construction,the DSAY40052 down the hole hammer is used to lower the 160 mm manganese chromium alloy steel casing to a depth of 30~40 m.Then,the impact rock is drilled to 122 m using an impact hammer,and the drilling of the bedrock layer is completed using the impact pressure of the down the hole hammer.At the same time,a high-speed and high-pressure air flow is provided by an air compressor to discharge the debris structure of the bedrock layer.In the acceptance results,as the test pressure gradually increases,the corresponding pressure fluctuation amplitude shows a gradually increasing trend,and the specific fluctuation intensity remains stable within 2%,indicating good pressure stabilization performance.
作者
刘思梦
LIU Simeng(Eco-Greenland(Beijing)Energy Technology Co.,Ltd.,Beijing 102200,China)
出处
《自动化应用》
2024年第16期162-164,共3页
Automation Application
关键词
复杂地质条件
地源热泵钻井
施工技术
基岩层打孔
高压空气流
稳压性能
complex geological conditions
ground source heat pump drilling
construction technology
drilling in bedrock layers
high-pressure air flow
pressure stabilization performance
