Quality Control for Weathered Rock Directional Drilling Pilot Hole Construction

ZHAO Peng, ZHANG Youzhu, ZHANG Haiyang


Directional Drilling Technology originated from the oil drilling industry, combining industrial and public utility construction technology, after the evolution of modern horizontal directional drilling technology, which is widely used in the construction of municipal pipelines, oil and gas pipeline industry, and is a kind of trenchless surface through the construction technology. At present, there is more weathering rock to pass through in the oil and gas pipeline construction, so a higher requirements for the construction of directional drilling mud. The weathering degree of heterogeneity of the rock at the same time and also caused great difficulties to construction, and the guide hole construction in the construction of directional drilling is the key control to the key working procedure, after the guide hole is dragged back reaming and pipe at all levels, the basis of the guide hole quality directly affects the pipeline back to success, is the most important factor in engineering which can be successfully completed, so how to control the construction quality of directional drill guide hole is particularly important.
Key words: Weathered rock; Directional drilling; Pilot hole; Mud


Weathered rock; Directional drilling; Pilot hole; Mud

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DOI: http://dx.doi.org/10.3968%2F5158


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