| 摘要 |
A method of drilling radial boreholes (40) from a first borehole (24) without withdrawing the drill string from the hole, by providing a first carrier string (12), a drill string (70) within the carrier string, and a method for orienting the position of the carrier string (12) relative to the position of the inner string (70), so that the strings are co-oriented without the need to retrieve either the carrier string (12) or the inner string (70) from the borehole (24) for drilling consecutive radial wells (40).
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