Welltec A/s Patente

The present invention relates to a downhole tool comprising a tool body having a tool axis and at least three arms movable between a retracted position and a projected position, each arm having a first arm part and a second arm part, where the second arm part is connected with the tool body, and the first arm part is projectable from the tool body, wherein the tool body comprises three actuator assemblies, each actuator assembly comprising a piston chamber and a piston unit, and each piston unit being connected with one of the second arm parts.

The present invention relates to a downhole tool comprising a main body having an upstream end and a downstream end, wherein the downstream end is provided with a cone assembly comprising a plurality of pivotally supported cone segments, wherein the cone assembly is operational between a retracted position in which a total diameter of the cone assembly is smaller than or equal to an inner diameter of the main body and an extended position in which the cone assembly forms a cone shape having a total diameter that is larger than the outer diameter of the main body.

The present invention relates to a method for creating a landing nipple having an annular edge in a well tubular metal structure on which a projection unit of an intervention downhole tool may land, comprising lowering a downhole tool section comprising a tubular metal element having a first outer diameter in a first condition into an existing well to a predetermined position, expanding the tubular metal element from the first condition to a second condition having a second outer diameter in which the tubular metal element abuts an inner face of the well tubular metal structure, creating the annular edge in the well, landing the projection unit on the annular edge, and performing an operation by an operational tool at a predetermined distance from the annular edge.

A downhole tool (1) comprising: a tool housing (5), a first end (9) and a second end (11), and a longitudinal extension having a longitudinal axis (A), a moveable tool part (13), where in a first operational position the moveable tool part is in a first position relative to the tool housing, and in a second operational position the moveable tool part is in a second position relative to the tool housing, an actuator configured to move the moveable tool part, a resistive sensor (35), having a variable resistor (43), whereby the movement of the movable tool part changes the resistance of the variable resistor to register the position of the moveable tool part relative to the tool housing.

The invention relates to a downhole patch comprising a tubular body having an upstream end, a downstream end, and an intermediate section extending from the downstream end to the upstream end, wherein the intermediate section has an exterior surface comprising a helical structure configured to guide fluid along the length of the intermediate section. The invention also relates to a method for patching a downhole structure.

The present invention relates to a wireline cleaning tool for collecting elements such as debris, shavings or other elements from a well fluid in a well, comprising a first electric motor powered through a wireline, a milling or drilling head comprising at least one inlet, a pump rotated by the first electric motor for providing a suction of well fluid containing elements, such as debris or shavings, in through the inlet, a chamber fluidly connected with the inlet for receiving the well fluid and for collecting elements in the well fluid, and a filtering device arranged for filtering the elements from the well fluid before the fluid passes through an outlet of the tool, wherein the wireline cleaning tool further comprises a second electric motor for rotating the milling or drilling head. The invention also relates to a downhole tool string comprising the wireline cleaning tool and a driving unit/downhole tractor, as well as a method of controlling a wireline cleaning tool.

A wireline cleaning tool (1) having a first tool end (23) connectable to a wireline and a second tool end, the wireline cleaning tool comprising an electric motor (2) powered through the wireline, a pump (4) driven by the electric motor, and a collection chamber (6) having at least one chamber inlet (8), wherein the pump is configured to provide a jet stream, and the second tool end has a tool inlet (9) fluidly connected with the chamber inlet for suction into the chamber of well fluid having fluid elements into the chamber, and the second tool end has a tool outlet (10) fluidly connected with the pump outlet for ejecting the jet stream into the well surrounding the tool.

The present invention relates to a fishing tool (100) comprising at least two claws (110) configured for externally gripping a fish (200) located downhole, and a moveable element (120) connected to at least one of the claws and reciprocally moveable between a first position corresponding to a fully open position of the claws and a second position corresponding to a fully closed position of the claws. The invention also relates to a method for providing a fishing tool and a method for operating a fishing tool.

A fishing tool is provided. The fishing tool (100) comprises a drive end (102) to be connected to an associated running structure (20), and an engagement end (104) configured to engage with a fish (200) located downhole, wherein the engagement end (104) comprises a rotationally self-aligning guiding structure (110).

The invention relates to a method and a system of determining the position of a downhole tool in a borehole, comprising introducing a downhole tool into the borehole, the downhole tool comprising an actuating tool and a downhole measurement device, receiving downhole data representing the borehole, where the downhole data include at least a first downhole landmark position representing a location of a landmark in the borehole, receiving a first signal from a downhole measurement device, the first signal representing a downhole landmark of a borehole and a measured position of the downhole landmark, comparing the first signal to the first landmark position of the downhole data and generating a first correction value, generating a first corrected depth value by correcting the first signal with the first correction value, and transmitting a first actuating signal to actuate the actuatable tool in a downhole position based on the first corrected depth value. The invention also relates to a system for performing the method.

The present invention relates to a retrieval tool string (100) for retrieving a fish (2) with a profile (3) facing a top (51) of a well having a well tubular (101), where the fish is a well component intentionally or unintentionally left in a wellbore such as a plug, a straddle, or a tool, the retrieval tool string comprising a wireline fishing tool (1) having a tool extension and comprising a wireline connection (4) for connection to a wireline (5), an electric motor (6) powered by the wireline (5), a first tool part (7) and a second tool part (8), the first tool part being nearest the wireline connection and comprising the electric motor (6), and the second tool part comprising a fish profile engagement device (9) for engaging the profile of the fish, wherein the first tool part and the second tool part have a disconnection arrangement (10) for disconnecting the second tool part in the well. The invention also relates to a retrieval method for retrieving a fish in a well.

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