| 摘要 |
A method and device for making lateral openings (11) out of a wellbore (1) in a ground formation (2) where at least one laterally directed drill string (28) is movable in the axial direction inside a motherbore tubular (4), and where the leading end portion (16) of the drill string (28) is equipped with the drill bit (18) that is driven by a rotatable drill string (28), wherein the method includes:
- connecting a fluid driven engine (22, 24, 26) to the rotatable drill string (28) inside the motherbore tubular (4); and
- directing flow in the motherbore tubular (4) through the fluid driven engine (22, 24, 26) to create rotation of the drill bit (18) via the drill string (28). |
