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Docking Technology In Trenchless Crossing

Docking Technology In Trenchless Crossing

In the construction of long-distance horizontal directional drilling through pilot holes, due to the large frictional resistance between the drill string and the hole wall, the rotation of the drill bit obviously lags behind the rotation of the drilling rig power head, which makes it difficult to control the downhole tool face angle. , so that the steering accuracy is …

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