| 摘要 |
A drilling module (1) for radial drilling in a well (2) and an anchoring module (6) for use in a well tool (5) are described, the well (2) being defined by a wall (21) and the well having an extent in an axial direction (A). The drilling module (1) comprises: - a piston (11) for receiving a drill (3) for the radial drilling, and for displacing the drill in a radial direction towards the wall (21) of the well (2); and - a cylinder (12) for receiving and guiding the piston (11), the drilling module (1) being characterized by both the piston (11) and the cylinder (12) being guide-free and of a non-circular shape, at least in a portion, to prevent relative rotation between them. In the position of application, the anchoring module (6) has an extent in the axial direction (A) of the well (2). The anchoring module (6) includes a displacement device (7) arranged to push, in the position of application, against a portion of the wall (21) of the well to press the anchoring module (6) against an opposite portion of the wall (21) of the well, the displacement device (7) being oblong in the axial direction (A) of the anchoring module (6). |
