Well tool modules for radial drilling and anchoring

A well tool comprising a drilling module for radial drilling in a well, the well being defined by a wall and the well having an extent in an axial direction, the drilling module comprising:

• a piston for receiving a drill for the radial drilling, and for displacing the drill in a radial direction towards the wall of the well;
• and
• a cylinder for receiving and guiding the piston, the cylinder having an inner diameter surface without any longitudinally extending guide and groove rotationally interlocking the piston and cylinder;
• wherein both the outer diameter of the piston and the inner diameter of the cylinder have a correspondingly non-circular shape, at least in a portion, to thereby prevent relative rotation there between;
• and
• wherein the drilling module comprises a motor arranged to rotate the cylinder which in turn, via the piston and the correspondingly non-circular shape of the outer diameter of the piston and inner diameter of the cylinder, rotates the drill.

A well tool comprising:

• an anchoring module for use in a well tool in a well, the well being defined by a wall and the well having an extent in an axial direction, the anchoring module comprising:
• in a position of application of the anchoring module, an extent in an axial direction of the anchoring module that is parallel to the axial direction of the well, and
• a displacement device arranged to push against a portion of the wall of the well to thereby press the anchoring module against an opposite portion of the wall of the well,
• wherein the displacement device comprises a piston that is oblong in the axial direction of the anchoring module;
• wherein the well tool comprises:
• a well-operation device connected to the anchoring module, the well-operation device having an operation zone for carrying out well operations, the operation zone of the well-operation device being positioned opposite to the displacement device of the anchoring module;
• wherein the well-operation device is a drilling module for radial drilling in a well, the well being defined by a wall and the well having an extent in an axial direction, the drilling module comprising:
• a piston for receiving a drill for the radial drilling, and for displacing the drill in a radial direction towards the wall of the well;
• and
• a cylinder for receiving and guiding the piston,
• wherein both the outer diameter of the piston and the inner diameter of the cylinder have a non-circular shape, at least in a portion, to thereby prevent relative rotation there between, for radial drilling in a well.