Abstract: A connection device for connecting a main pipe (1) to a secondary pipe (2). The connection device includes a substantially cylindrical connection piece (3), able to be inserted, preferably able to be screwed, into a wall opening of the main pipe (1), for connection of the secondary pipe (2), wherein for sealing the connection piece (3) a preferably ring-shaped sealing element (4) is provided, lying against the main pipe (1), which sealing element is connected directly or via mechanical connecting elements to an outer circumference of the connection piece (3).

Abstract: The invention relates to a hydraulic motor (2), comprising a cylindrical motor housing (201) with a central cylindrical rotor (202) carrying longitudinal vanes (208), wherein the vanes (208) are provided at the outer surface of the rotor (202) in such a manner that they can protrude into an annular space between the housing (201) and the rotor (202) in order to create a circumferential driving force on the rotor, wherein the housing (201) comprises inwards pointing salient cams (210) on its inner surface, which separate the annular space between the housing (201) and the rotor (202) into several hydraulic chambers (211) with at least one inlet (212) and at least one outlet (213) for a hydraulic medium, and the vanes (208) can swing around a longitudinal axis that is mostly parallel to the rotation axis of the rotor (202) into the hydraulic chambers (211). The invention further relates to the use of such a hydraulic motor in a drilling system, and a drilling system with such a hydraulic motor.

Abstract: The invention relates to a hydraulic motor (2), comprising a cylindrical motor housing (201) with a central cylindrical rotor (202) carrying longitudinal vanes (208), wherein the vanes (208) are provided at the outer surface of the rotor (202) in such a manner that they can protrude into an annular space between the housing (201) and the rotor (202) in order to create a circumferential driving force on the rotor, wherein the housing (201) comprises inwards pointing salient cams (210) on its inner surface, which separate the annular space between the housing (201) and the rotor (202) into several hydraulic chambers (211) with at least one inlet (212) and at least one outlet (213) for a hydraulic medium, and the vanes (208) can swing around a longitudinal axis that is mostly parallel to the rotation axis of the rotor (202) into the hydraulic chambers (211). The invention further relates to the use of such a hydraulic motor in a drilling system, and a drilling system with such a hydraulic motor.

Abstract: The invention relates to a connection device for connecting a main pipe (1) to a secondary pipe (2), comprising a substantially cylindrical connection piece (3), able to be inserted, preferably able to be screwed, into a wall opening of the main pipe (1), for connection of the secondary pipe (2), wherein for sealing the connection piece (3) a preferably ring-shaped sealing element (4) is provided, lying against the main pipe (1), which sealing element is connected directly or via mechanical connecting elements to an outer circumference of the connection piece (3).