Welltec A/s

Sven Karsten Jensen

Jørgen Hallundbæk

Tomas Sune Andersen

Christian Krüger

Jørgen Hallundbaek

Thomas Sune Andersen

Joergen Hallundbaek

Rune Garbers Born

The present invention relates to a downhole wireline machining tool string for increasing an inner diameter of a well tubular metal structure in a well. The downhole wireline machining tool string has a longitudinal axis and comprises a rotatable tool part comprising a machining tool having a first end part, a second end part, a diameter and a circumference, and a stationary tool part comprising a driving unit configured to rotate the rotatable tool part and powered through the wireline. The machining tool comprises a body having an outer face, and the machining tool further comprising a plurality of inserts, each insert having a length along the longitudinal axis, and the inserts projecting from the outer face of the body and being distributed around the circumference. Furthermore, the present invention relates to a machining tool for increasing an inner diameter of a well tubular metal structure in a well or cutting out a piece, e.g. in a downhole valve.

Downhole wireline machining tool string

Drilling tool () for drilling openings in a cement ballast tank () of an oil rig in order to gain access to an internal space in the ballast tank comprising an electrical motor () driving a first shaft (); a pump () driven by the motor for pumping well fluid in through an inlet () and out through an outlet (); a gear () driven by the first shaft extending through the pump for reducing rotation of a second shaft (); and a drilling head () having bits and at least one drilling head fluid channel and being driven by the second shaft (), the outlet of the pump being fluidly connected with the fluid channel to pump well fluid out through the fluid channel.

Drilling tool

Downhole wireline cleaning tool () adapted to scrape and remove objects, such as scale decreasing an inner diameter of a casing in a wellbore, comprising a tool housing () having a first housing part () and a second housing part (), a projectable arm () which is pivotably connected with the first housing part at a first end of the projectable arm, the projectable arm having a plurality of bits () in a second end, said projectable arm () being movable between a retracted position and a projected position in relation to the tool housing (), an arm activation assembly () for moving the projectable arm between the retracted position and the projected position, and a rotatable shaft () for rotating the projectable arm (), wherein the bits are arranged along an extension of the projectable arm, wherein the extension of the arm extends across the center tool axis in at least the retracted position, so that the bits of the arm are arranged to scrape the entire internal cross-sectional area of the casing.

Downhole wireline cleaning tool

The present invention relates to a downhole tool head () for mounting onto a downhole tool () for drilling in a formation downhole or for releasing precipitated solids (), such as ice, scales or the like, in a cavity fluid in a pipeline, a casing (), a well or any other cavity downhole. The downhole tool head comprises a hollow cylindrical body () with a circumferential wall () extending from a base part of the body, the circumferential wall having a circumferential rim () in its end opposite the base part. The circumferential rim () comprises a plurality of edges () for cutting, grinding, drilling and/or milling, and the base part has a plurality of through-going holes () for letting cavity fluid comprising precipitated solids pass the holes.

Downhole tool head for releasing precipitated solids

A drilling head, method of drilling, and use of the drilling head, for reboring a stuck valve or drilling into the formation downhole and, in particular a drilling tool having a drilling head and a driving unit. The drilling head includes a hole saw beside a drill bit for cutting out a piece from the stuck valve. A drilling system includes the drilling tool and a driving tool for moving the drilling tool downhole.

Growing community of inventors

Stenløse, Denmark

Sven Karsten Jensen