China Petroleum Network News (correspondent Yang Tianxi Zou Liye) as of now, Dagang downhole operation company developed a set of milling, fishing and integration tool, in 5 wells on the test, success. The application of the integrated milling and fishing tool reduces the workover cost by 50%, and shortens the construction period by half. At the same time, greatly reduce the safety risk of the construction process.
In downhole operation, casing milling and fishing are two frequent combinations. In the past construction, all the materials, such as dirt, sand and dirt which were blocked by air in the air, were cleaned and cleaned by the milling process and the milling tool. Sometimes, according to the condition of the well, it is necessary to repeat this combination process many times to achieve the purpose of construction. This combination process not only occupies most of the construction cycle, but also increases the risk in construction.
Through 3 months' design, improvement and test, the downhole operation company has developed a set of milling and fishing integrated tools. The tool is composed of a set of milling tools, fishing tools, a telescopic rod, the upper joint is composed of 4 parts, the milling process and fishing technology organically, two step process into one step, greatly shorten the construction period, reduce the cost.
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