Abstract: The present invention relates to a downhole electrical motor elongated in a longitudinal direction, comprising a housing, a stator comprised inside the housing, a rotor comprised inside the stator rotatably connected to the stator, wherein the rotor has a locked end and a non-locked end and is locked in the locked end to avoid movement of the rotor in the longitudinal direction, and the rotor is able to move along the longitudinal direction in the non-locked end of the rotor to avoid thrust loads on the rotor due to thermal expansion of the rotor during rotor heating when the electrical motor is in operation and further comprising a locked bearing connected to the stator for supporting the rotor in the locked end and a non-locked bearing connected to the stator for supporting the rotor in the non-locked end, wherein the bearings are at least partially made from a ceramic material.

Abstract: The present invention relates to a downhole driving unit (11) for insertion into a well, comprising a driving unit housing (51), a hydraulic motor comprising a hydraulic motor housing (93), the hydraulic motor comprising a cam ring (24), a wheel assembly (90) comprising a stationary part (91) and a rotational part, the stationary part (92) being connected with the driving unit housing and a rotatably connected with a rotational part, the stationary part and the rotational part constituting the hydraulic motor housing, said hydraulic motor comprising a rotatable section (84) connected with the rotational part, the cam ring being connected with or forming part of the stationary part of the wheel assembly, the rotational part comprising a wheel ring (99), where in a bearing (36) is arranged between the cam ring and the wheel ring. The present invention also relates to a downhole system comprising the driving unit and to use of such driving unit.

Abstract: The present invention relates to a downhole driving unit (11) (for insertion into a well, comprising a driving unit housing (51), an arm assembly (60) movable between a retracted position and a projecting position in relation to the driving unit housing, an arm activation assembly (41) arranged in the driving unit housing for moving the arm assembly between the retracted position and the projecting position and a wheel assembly (90) comprising a stationary part (91) and a rotational part (92), the stationary part being connected with or forming part of the arm assembly and being rotatably connected with a rotational part. The wheel assembly comprises a hydraulic motor comprising a hydraulic motor housing (93) and a rotatable section (84) connected with the rotational part for rotating part of the wheel assembly. Furthermore, the present invention relates to a downhole system comprising said driving unit and to use of such driving unit.

Abstract: The present invention relates to a downhole tool extending in a longitudinal direction, comprising a tool housing; an arm assembly pivotally mounted about a pivot point fixed in relation to the tool housing and movable between a retracted position and a projecting position in relation to the tool housing; an arm activation assembly for moving the arm assembly between the retracted position and the projecting position, the arm activation assembly being arranged inside the tool housing and having a first end face and a second end face adapted for being connected with the end faces of other arm activation assemblies; wherein the arm activation assembly comprises: a piston housing having a piston chamber extending in the longitudinal direction of the downhole tool and comprising: a first piston housing part, a second piston housing part removably connected to the first piston housing part, a piston member arranged inside the piston housing and connected with the arm assembly, the piston member being movable in th

Abstract: The present invention relates to a downhole pressure compensating device for use in combination with a downhole tool, comprising a housing with a chamber and an internal hollow section, a first piston dividing the chamber into a first section and a second section, the first section being in fluid communication with a first fluid port, the second section being in fluid communication with a borehole through a second fluid port, and a first spring disposed within the second section to exert a pressure on the first piston to enable the conservation of an overpressure in the first section. Furthermore, the device comprises a second piston, a second spring disposed between the first piston and the second piston, and an overpressure channel arranged in the first or the second piston, which overpressure channel, when the second spring is in a compressed condition, provides fluid communication between said first and second sections.

Abstract: The present invention relates to a downhole driving unit (11) for insertion into a well, comprising a driving unit housing (51), a hydraulic motor (23) comprising a hydraulic motor housing (93), a wheel assembly (90) comprising a stationary part (91) and a rotational part (92), the stationary part being connected with the driving unit housing and being rotatably connected with the rotational part, the stationary part and the rotational part constituting the hydraulic motor housing, the rotational part comprising a wheel ring (99) closed from one end, wherein the wheel assembly comprises a spring member (113) assembling the hydraulic motor housing.

Abstract: The present invention relates to a downhole driving unit (11) for insertion into a well, comprising a driving unit housing (51), a hydraulic motor (23) comprising a hydraulic motor housing (93), a wheel assembly (90) comprising a stationary part (91) and a rotational part (92), the stationary part being connected with the driving unit housing and being rotatably connected with a rotational part, the wheel assembly comprising a wheel ring (99) for contacting an inner wall in the well and connected with or forming part of the rotations part. The wheel assembly further comprises the hydraullic motor (23) so that the stationary part and the rotational part constitute the hydraulic motor housing, the hydraulic motor comprising a rotatable section (84) connected with the rotational part for rotating part of the wheel assembly.

Abstract: The present invention relates to a downhole tool comprising a tool housing for accommodating components of the downhole tool, the tool housing comprising; a first tool housing part having a first end face and a second end face, and an activation unit removably connected with the first tool housing part, the activation unit comprising: a second tool housing part, and a closing member removably connected with the second tool housing part, wherein the second tool housing part and the closing member together constitute a fluid-tight chamber wherein a fluid is retained, the fluid-tight chamber housing mechanical and/or hydraulic and/or electrical components, and wherein the activation unit may be separated from the first tool housing part while the closing member is connected with the second tool housing part. The invention further relates to a downhole system and to a method of performing services of a downhole tool.

Abstract: The present invention relates to a downhole tool extending in a longitudinal direction, comprising a tool housing, an arm assembly movable between a retracted position and a projecting position in relation to the tool housing, the arm assembly comprising an arm member connected with the tool housing in one end, an arm activation assembly arranged in the tool housing for moving the arm assembly between the retracted position and the projecting position, a pump for circulating hydraulic fluid, wherein the arm assembly comprises a hydraulic mechanism arranged in connection with the arm member, and a fluid influx channel provided in the arm member, the fluid influx channel being in fluid communication with the hydraulic mechanism for supplying hydraulic fluid from the pump to the hydraulic mechanism. Furthermore, the invention relates to a tool string system comprising a plurality of downhole tools, wherein at least one of the downhole tools is a downhole tool according to the invention.

Abstract: The present invention relates to a downhole tool, comprising a hydraulic assembly, an arm assembly, the arm assembly comprising a wheel, a hydraulic motor for rotating the wheel, thereby driving the downhole tool in a forward direction, and a hydraulic pump unit for simultaneous generation of a first and a second pressurised fluid, characterised in that the arm assembly is movable between a retracted position and a projecting position in relation to the tool housing, and the downhole tool furthermore comprises an arm activation assembly for moving the arm assembly between the retracted position and the projecting position, and the hydraulic motor drives the downhole tool in the forward direction when the arm assembly is in the projecting position, the arm activation assembly being in fluid connection with the first pressurised fluid and the hydraulic motor being in fluid connection with the second pressurised fluid, a hydraulic control block for controlling the pressure of the first pressurised fluid having a

Abstract: The present invention relates to a downhole tool extending in a longitudinal direction, comprising a tool housing; an arm assembly movable between a retracted position and a projecting position in relation to the tool housing; an arm activation assembly for moving the arm assembly between the retracted position and the projecting position; wherein the arm activation assembly comprises: a piston housing comprising a piston chamber, said piston chamber extending in the longitudinal direction of the downhole tool, a piston member arranged inside the piston chamber and engaged with the arm assembly to move the arm assembly between the retracted position and the projecting position, the piston member being movable in the longitudinal direction of the downhole tool and having a first piston face and a second piston face, the piston member being able to apply a projecting force on the arm assembly by applying a hydraulic pressure on the first piston face moving the piston in a first direction, and a spring member ap

Abstract: The present invention relates to a downhole well-operation system for operating a driving unit and a logging tool downhole and transmitting well-logging data from at least one logging tool to a surface data acquisition system by means of a wireline. The system comprises a surface transceiver, a wireline, a downhole transceiver, a logging tool, and a driving unit, wherein the downhole transceiver is coupled to the surface transceiver via the wireline and communicates to the surface transceiver using orthogonal frequency division multiplexing to transmit data via the wireline by modulating a Pulse Width Modulated (PWM) signal to the wireline by means of a transistor bridge, while the driving unit and at least one logging tool is powered by the wireline. Furthermore, the invention relates to a downhole tool.

Abstract: The present invention relates to a lateral junction assembly (1) for providing a lateral junction in a wellbore by being inserted into a casing (60) having an opening (61) and defining a longitudinal axis (52), the lateral junction assembly (1) having a longitudinal direction (50) which is substantially parallel to the longitudinal axis (52) and comprising a pipe module (10) comprising a pipe section (12) for being inserted through the opening (61) in the casing and a flange (11), wherein the lateral junction assembly further comprises a fixation element (25) adapted for being connected with the flange (11) to fixate the pipe module (10) in a predetermined location with the pipe section extending through the opening (61) in the casing (60).

Abstract: The present invention relates to an artificial lift tool for being introduced in a wellbore or a casing and submerged in well fluid. The artificial lift tool extends in a longitudinal direction from a top end adapted to be connected to a wireline to a bottom end. The tool comprises a motor unit and a pump unit. Furthermore, invention relates to a production well wherein the artificial lift tool is submerged in a well fluid; to the use of the artificial lift tool for providing artificial lift in a well; and to a method for providing artificial lift in a well.

Abstract: The present invention relates to a an inflow assembly (1) for controlling fluid flow between a hydrocarbon reservoir (2) and a production casing in a well, comprising a first tubular (4) having an axial extension and at least one inlet (5) and a first wall (6) with at least a first axial channel (7) extending in the first wall from the inlet, a second tubular (8) having a first (9) and a second end (10) and at least one outlet (11), the second tubular being rotatable within the first tubular and having a second wall (12) with at least a second axial channel extending in the second wall from the first end to the outlet. The invention further relates to an assembly for controlling fluid flow between a hydrocarbon reservoir and a production casing in a well. Finally, the present invention relates to a downhole completion comprising a casing string and one or more of the inflow assembly/assemblies according the invention.

Abstract: The present invention relates to a logging tool for logging formational changes in a borehole, the logging tool having a longitudinal axis. The logging tool comprises a radiating source (5) for emitting an interaction signal, a detector (6) for detecting a reaction signal, and a screen (7) for limiting a volume (53) investigated by the radiating source and the detector, wherein the tool comprises a first part (8) and a second part (9), the second part being able to rotate around the longitudinal axis relative to the first part during use, and the second part comprising the screen (7), and wherein a speed of rotation of the second part is controlled by the rotation unit to be proportional to an output signal of the detector. Furthermore, the present invention relates to a method of characterising a geological formation surrounding a borehole by a logging tool according to the present invention.

Abstract: The present invention relates to a downhole tool system for being submerged into a casing, comprising at least three tools having a tool axis. Furthermore, the present invention relates to a downhole tool system for being submerged into a casing, comprising at least three tools, and finally the invention relates to communication methods for communicating wirelessly between a first and a third tool separated by a second tool.

Abstract: The present invention relates to a wireless downhole unit (1) adapted to be lowered into a well (2) in a casing (3) having an inner wall (4) and an inner diameter (Dc). The wireless downhole unit comprises an electrical motor (5), a pump (6), and driving means (7) for allowing movement of the wireless downhole unit within the casing, and at least one battery pack (8). The present invention further relates to a downhole system.

Abstract: The present invention relates to a downhole system (200) comprising a casing (3) having an inner wall. Furthermore, the downhole system comprises a wireless unit (1) which is movable within the casing, comprising driving means (7) in the form of wheels and at least one battery pack (8) comprising at least one battery for powering an electrical motor (5) driving a pump (6) driving the wheels to rotate along the inner wall of the casing, wherein the downhole system further comprises a well head (110) having a sound detection device (16) for detecting vibrations in the casing, e.g. caused by the driving means or an operation performed by the wireless unit.

Abstract: The present invention relates to a downhole punch for insertion into a wall of a casing. The downhole punch comprises a body having a first end and a second end and a through-bore forming an inner face of the body and an outer face of the body, wherein the first end comprises at least one cutting edge at least forming a leading tip or a leading edge for punching an opening in the casing, and a component is arranged in the through-bore. The present invention also relates to a downhole valve for insertion into a wall of a casing. The downhole valve comprises a housing having a first end and a second end and an inner face and an outer face. Furthermore, the invention relates to a downhole tool for inserting a downhole valve into a wall of a casing, to a downhole system comprising the downhole tool as well as to a downhole method for insertion of a downhole unit into a casing downhole.