A mechanical floating is used because of instrument, water quality and down hole tools that make in-correct result measured or instrument blocked down hole.
使用机械浮子井下流量计经常因仪器、水质、井下工具等问题，造成测试资料不准或因卡住仪器而修井。
It is the key problems faced by the petroleum industry how to improve the strength and wear resistance of down-hole drilling tools.
特别是如何进一步提高井下钻具的强度、耐磨性等是当前石油天然气工业所面临的一些关键技术问题。
With the development of oilfield and a great use of well-bore tools, such fishing technology will have a wide prospect applied to the more and more complex conditions of down-hole operations.
随着油田的深入开发，井筒工具的大量使用，井下作业越来越复杂，该项打捞技术具有广阔的应用前景。
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