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Specialised petroleum services group limited
Specialised petroleum services group limited
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机译:石油专业服务集团有限公司
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摘要
A downhole tool (10) for use in the removal of burrs or other unwanted material from an inner surface of a pipeline, well casing or other tubular. The toll has a plurality of milling elements (32), which may be biased against the surface or retracted from the surface to disengage the toll from the tubular. A drop ball mechanism with a fluid by-pass is described for disengaging the milling elements.
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