Welltec A/s Patente

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 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.

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.

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