Abstract: Various apparatus, a wellbore string incorporating the apparatus, and a computer-implemented method are described, whereby in various examples at least one flexible elongate member is guided from a wellbore string toward a wall of the wellbore for forming at least one lateral bore in a subsurface rock formation for stimulating the formation. The apparatus in such examples has at least one controllable body which is controllable, based upon a detected downhole configuration of the controllable body and/or the wellbore string, to be positioned with respect to the wellbore string for providing at least one exit through which the flexible elongate member is extractable from the wellbore string for extracting the flexible elongate member through the exit in a desired and/or preferred direction.

Abstract: A method and device are for making lateral openings out of a wellbore in a ground formation where at least one laterally directed drill string is movable in the axial direction inside a motherbore tubular, and where the leading end portion of the drill string is equipped with the drill bit that is driven by a rotatable drill string. The method includes connecting a fluid driven engine to the rotatable drill string inside the motherbore tubular, and directing flow in the motherbore tubular through the fluid driven engine to create rotation of the drill bit via the drill string.

Abstract: A method and device are for making lateral openings out of a wellbore in a ground formation where at least one laterally directed drill string is movable in the axial direction inside a motherbore tubular, and where the leading end portion of the drill string is equipped with the drill bit that is driven by a rotatable drill string. The method includes connecting a fluid driven engine to the rotatable drill string inside the motherbore tubular, and directing flow in the motherbore tubular through the fluid driven engine to create rotation of the drill bit via the drill string.

Abstract: Method and apparatus are for connecting a pipe to a confinement of a subsurface borehole where an annulus is formed between the pipe and the confinement. The method includes: providing an expandable metallic bladder element, that by use of a fluid is expandable between an unexpanded and an expanded position, in a sector of the annulus; and expanding the metallic bladder element.

Abstract: A method and device for deploying a cable and an apparatus in a ground formation having a motherbore, wherein the method comprises positioning a non-rotating drill pipe, a cable and an apparatus in a motherbore tubular; and drilling a lateral opening relatively the motherbore by displacing the drill pipe into the formation with the cable and apparatus attached.

Abstract: A method and device for producing an opening from a motherbore into the surrounding formation, wherein the method includes: positioning a motor, having a rotatable barrel, in the motherbore; passing an elongated body through the barrel; and letting the motor rotate the elongated body as the elongated body is moved along the barrel and into the formation.

Abstract: A method is for making a relatively long and narrow penetration in the ground where a jetting head that has a longitudinal axis is attached to a leading end of a tubular. The method comprises providing the jetting head with at least one fixed nozzle that is positioned at the leading end portion of the jetting head and where the fixed nozzle has an elongated cross section; and flowing liquid through the nozzle where a resulting liquid fan is directed towards the ground in front of the jetting head.

Abstract: A method and device for deploying a cable and an apparatus in a ground formation having a motherbore, wherein the method comprises positioning a non-rotating drill pipe, a cable and an apparatus in a motherbore tubular; and drilling a lateral opening relatively the motherbore by displacing the drill pipe into the formation with the cable and apparatus attached.