Abstract: A downhole tool extending in a longitudinal direction includes a tool housing; an arm assembly movable between a retracted position and a projecting position in relation to the tool housing; and an arm activation assembly arranged in the tool housing for moving the arm assembly between the retracted position and the projecting position. The arm activation assembly has a piston chamber extending in the longitudinal direction of the downhole tool, and a piston member arranged inside the piston chamber and movable in the longitudinal direction of the downhole tool. The arm activation assembly further includes a torque member with a first fluid channel for supplying hydraulic fluid from a pump to the arm assembly, the torque member being connected with the arm assembly. The torque member is rotated by the movement of the piston member, whereby the arm assembly is moved.

Abstract: The present invention relates to a downhole system (100) for sealing an opening (2) in a wall of a well tubular structure in a borehole (4) downhole by means of a downhole tubular assembly (1), comprising the downhole tubular assembly comprising an expandable tubular part (5) having an inner face (6) and an unexpanded expandable tubular thickness in an unexpanded state, and a helical spring (7) having a helical inner diameter, a radial helical spring thickness and a helical outer diameter in an unexpanded state, the helical spring being arranged inside the expandable tubular part and substantially concentrically with the expandable tubular part, an expansion tool (9) for expanding the tubular assembly inside the well tubular structure (3) in one direction, the expansion tool comprising an expansion part having a diameter, and the expansion tool being arranged substantially on an axis which is concentric and longitudinal with the tubular assembly, and positioned in a first position, wherein the expandable tubu

Abstract: The present invention relates to a method for controlling a drilling or cutting operation performed by a wireline tool downhole, comprising the steps of commencing a drilling or cutting operation in a downhole object, such as a casing or valve; detecting vibration produced during the drilling or cutting operation in the downhole object using a vibration sensor adapted to transmit detected vibrations; processing a vibration signal from the vibration sensor to produce a real-time frequency spectrum; comparing the frequency spectrum to a reference frequency spectrum; and controlling the operation based upon the comparison of the frequency spectrum and the frequency spectrum specification. Furthermore, the present invention relates to a wireline tool for performing a drilling or cutting operation downhole and carrying out the method according to the invention.

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: An annular barrier to be expanded in an annulus between a well tubular structure and an inside wall of a borehole downhole, includes a tubular part for mounting as part of the well tubular structure. The tubular part has a longitudinal axis, an expandable sleeve surrounding the tubular part and having an outer face, each end of the expandable sleeve being fastened to the tubular part by a connection part, an annual barrier space between the tubular part and the expandable sleeve, an aperture in the tubular part or the connection part for letting fluid into the space in order to expand the sleeve, and a self-actuated device arranged in the aperture having an open and a closed position.

Abstract: A downhole tool extending in a longitudinal direction includes a tool housing, an arm assembly movable between a retracted position and a projecting position in relation to the tool housing, the arm assembly having 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, and a pump for circulating hydraulic fluid. The arm assembly has 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.

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 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 expandable tubular to be expanded in a well downhole from a first outer diameter to a second outer diameter to abut against an inner face of a easing or borehole, the downhole expandable tubular having an outer face and a longitudinal extension and comprising at least one first circumferential edge and at least one second circumferential edge provided on the outer face and spaced apart in the longitudinal extension, wherein a sealing element and a split ring-shaped retaining element are arranged between the first and second circumferential edges, the split ring-shaped retaining element forming a back-up for the sealing element and wherein the split ring-shaped retaining element has more than one winding, so that when the expandable tubular is expanded from the first outer diameter to the second outer diameter, the split ring-shaped retaining element partly unwinds. Furthermore, the present invention relates to an annular barrier.

Abstract: The present invention relates to a completion method for completing a uniform inner bore downhole completion system in a reservoir in a formation, comprising the steps of drilling a hole in the formation, inserting a surface casing having an inner surface casing diameter, cementing an outer face of the surface casing to the hole, inserting a drilling head in the surface casing, drilling a main bore extending from the surface casing, the main bore having a first part and a second part, the second part comprising an end of the main bore, and the main bore having an inner main bore diameter which is substantially the same as the inner surface casing diameter of the surface casing, retracting the drilling head from the main bore and the surface casing, inserting a lower production casing in the second part of the main bore, the lower production casing having annular barriers and an inner diameter, setting at least one of the annular barriers of the lower production casing, inserting the drilling head into the fir

Abstract: A method for improving fuel collection from an underground deposit comprising stimulating fuel-containing sections of an underground formation, the sections being located between a first well and a second well, the first well being either an injection well or a production well, and the second well being a production well. The method includes arranging a mechanical wave generation device downhole in the first well and arranging at least a first mechanical wave sensor in the production well, injecting a pressurized fluid into the formation from at least the first well, activating the mechanical wave generation device downhole to project mechanical waves into and through the fuel-containing sections, receiving and processing the waves sent from the first well, generating a tomography of the underground environment between the first well and the second well, and collecting fuel in the second well via inflow valves arranged in the second well.

Abstract: A downhole pressure compensating device includes 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 includes 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 sealing method for sealing a zone of a casing in a well, the zone comprising several leaks, perforations and/or weakened casing parts, or other irregularities having a casing characteristic which, when measured, is found to be outside a predetermined interval. The sealing method comprises the steps of measuring the characteristics of the casing, determining a position of the zone, determining an extent of the zone in a longitudinal direction of the casing, determining a part of the zone and an extent of the part whose casing characteristic when measured is within the predetermined interval, the part extending in the longitudinal direction of the casing, positioning a first liner overlapping the first area of the part of the casing, positioning a second liner overlapping the second area of the part of the casing, expanding the first liner, and expanding the second liner.

Abstract: The present invention relates to a downhole safety device (1) for a downhole tool (2) for controlling a delivery of electricity from a power device to an electrical component in the tool, comprising a first member (3) comprising a plurality of conductors (4) and a second member (6) comprising a plurality of conductors (7). Furthermore, the invention relates to a method for activating the safety device.

Abstract: The present invention relates to a downhole tubing cutter tool for submerging into a casing in a wellbore and separating an upper part of the casing from a lower part of the casing by cutting the casing from within, the tool extending in a longitudinal direction, comprising a tool housing having a first and a second housing part, a cutting arm which is pivotably connected with the first housing part and has a cutting edge in a first end, said arm being movable between a retracted position and a projected position in relation to the tool housing, an arm activation assembly for moving the cutting arm between the retracted position and the projected position, and a rotatable shaft arranged in the second housing part and connected with the first housing part for rotating the cutting arm.

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 casing module for being part of a downhole casing system, comprising a base pipe extending in a longitudinal direction and having a circumference, a functional assembly mounted over the base pipe to define a casing module flow path between the functional assembly and the base pipe, and a main flow path arranged substantially in a center of the base pipe and extending in a longitudinal direction of the casing system, wherein at least a part of the casing module flow path is an annular flow path extending both in the longitudinal direction of the base pipe and continuously around the entire circumference of the base pipe, and the base pipe has end sections at which a plurality of supporting structures protrude from an outer surface to provide support for the functional assembly, the supporting structures defining a plurality of casing module flow paths extending in the longitudinal direction.

Abstract: The present invention relates to a downhole tool comprising a tool housing, an electronics assembly comprising an electronic module located within the housing, wherein the electronics assembly further comprises a plurality of transistor elements being electrically connected with the electronic module and being arranged on a thermal member which is thermally connected with the housing, wherein the electronic module is thermally insulated from the thermal member. Furthermore, the invention relates to a downhole system comprising a wireline, a tool string, and a downhole tool according to the invention.

Abstract: The present invention relates to a downhole tool for guiding a device into a side track of a borehole, the tool having a tool axis and comprising a tool housing connected to an energy source. The invention further relates to a method for moving the downhole tool into a side track.

Abstract: The present invention relates to a downhole wireline tool for performing an operation in a well at a depth of up to 15 km downhole, the tool being powered by direct current at a predetermined voltage in a first end by a power supply unit which is configured to provide a specific steady-state voltage selected from a plurality of predetermined voltages, comprising an electrical motor being powered by alternating current, a frequency converter arranged between the first end and the motor, and a voltage peak reduction unit adapted to reduce the steady-state voltage of the selected power supplied to the frequency converter from the power supply, the voltage peak reduction unit comprising a capacitor, wherein the capacitor is a high temperature capacitor having a dielectric comprising a material capable of resisting a temperature above 150° C.