The present invention relates to a method for manufacturing a plate of a turbomachine having a plurality of receiving grooves, which are formed on the cylindrical peripheral surface of the plate in order to receive blade roots of blades of the turbomachine. The receiving grooves extend in a straight line from one face of the plate to the other face of the plate, such that a straight line delimits the receiving groove from each point on the cross section of the receiving groove on one of the faces to the corresponding point on the cross section on the other face. A circular plate is provided and a plurality of receiving grooves are introduced into the plate simultaneously on opposing regions relative to a central axis of rotation of the plate.

The present invention relates to a downhole tool (23), for removing sections of metal tubing, comprising: at least one conductive element (1) being arranged to corrode a section of metal tubing using an electrolytic process, said conductive element (1) being a tube or a pipe which is made of electric conductive material, an apparatus (4) to establish a connection to the metal tubing (2), and a milling apparatus with cutting or abrasive elements (3) arranged to remove byproducts from the electrolytic process. The invention also relates to a modular downhole tool (45), comprising an elongated main shaft (8) with several modules for insertion in a wellbore.

An apparatus and method to machine cavities in die blanks having little to no taper. The apparatus includes an elec trode tool (200) including intersecting walls coated with electrically insulating coating (258), an erosion face (204) comprising a cross section of the walls exposed through the electrically insulating coating, and a channel formed by the walls to supply electrolyte to the erosion face, the channels defined by interior surfaces of the walls and having an opening formed by edges of the erosion face. The method includes pulsed electrochemical machining a work piece with the electrode tool.

An apparatus and method to machine cavities in die blanks having little to no taper. The apparatus includes an elec trode tool (200) including intersecting walls coated with electrically insulating coating (258), an erosion face (204) comprising a cross section of the walls exposed through the electrically insulating coating, and a channel formed by the walls to supply electrolyte to the erosion face, the channels defined by interior surfaces of the walls and having an opening formed by edges of the erosion face. The method includes pulsed electrochemical machining a work piece with the electrode tool.

A method for electrochemically processing a workpiece surface using an electrode, which has at least one effective surface for processing the workpiece surface, and using an electrolyte, wherein the electrolyte is suctioned away from the effective surface. The invention further relates to an electrode, which has at least one electrolyte feed for supplying the electrolyte to the effective area and an electrolyte suctioning system for suctioning the electrolyte away from the effective area.

A method for electrochemically processing a workpiece surface using an electrode, which has at least one effective surface for processing the workpiece surface, and using an electrolyte, wherein the electrolyte is suctioned away from the effective surface. The invention further relates to an electrode, which has at least one electrolyte feed for supplying the electrolyte to the effective area and an electrolyte suctioning system for suctioning the electrolyte away from the effective area.

The invention discloses a continuous electrochemical machining apparatus, which comprises an electrode wheel and an auxiliary module. The auxiliary module pushes the material tape to the insulating part of the electrode wheel. The electrode wheel drives the material tape to move. Electrochemical machining is performed on the material tape using at least a conductive pattern of the electrode wheel for forming a plurality of patterns on the material tape. Thereby, continuous electrochemical machining can be performed on the material tape.

The invention discloses a continuous electrochemical machining apparatus, which comprises an electrode wheel and an auxiliary module. The auxiliary module pushes the material tape to the insulating part of the electrode wheel. The electrode wheel drives the material tape to move. Electrochemical machining is performed on the material tape using at least a conductive pattern of the electrode wheel for forming a plurality of patterns on the material tape. Thereby, continuous electrochemical machining can be performed on the material tape.

An electrochemical well pipe cutting instrument, applicable in particular for cutting any type of pipes accessing underground works with conductive fluid inside, includes at least one device for ensuring electrical continuity and at least one electrode. The instrument also includes at least one device for ensuring mechanical fixation of the instrument in the pipe such as an anchor. The device for ensuring electrical continuity, the anchor and electrode can be adjusted in length to suit different diameters of pipe within a large range. Optionally the electrodes are located on a rotary device. The instrument is connected to a main instrument body which includes an electronic module, at least one centralizer and a CCL module with an inclinometer. The main instrument body is connected to a cable head which ensures the communication to a surface unit.

An electrochemical well pipe cutting instrument, applicable in particular for cutting any type of pipes accessing underground works with conductive fluid inside, includes at least one device for ensuring electrical continuity and at least one electrode. The instrument also includes at least one device for ensuring mechanical fixation of the instrument in the pipe such as an anchor. The device for ensuring electrical continuity, the anchor and electrode can be adjusted in length to suit different diameters of pipe within a large range. Optionally the electrodes are located on a rotary device. The instrument is connected to a main instrument body which includes an electronic module, at least one centralizer and a CCL module with an inclinometer. The main instrument body is connected to a cable head which ensures the communication to a surface unit.