The grinding device is for removing a collapsed liner inside a pipe. The grinding device has a connector for a drive shaft, a body rotatable around a rotation axis with the drive shaft and grinding cutters attached to the body. The grinding cutters have cutting edges provided in a plane perpendicular to the rotation axis of the body and the grinding device further has an outer periphery isolated from rotation of the body by bearings.

The grinding device is for removing a collapsed liner inside a pipe. The grinding device has a connector for a drive shaft, a body rotatable around a rotation axis with the drive shaft and grinding cutters attached to the body. The grinding cutters have cutting edges provided in a plane perpendicular to the rotation axis of the body and the grinding device further has an outer periphery isolated from rotation of the body by bearings.

The invention relates to a clearing device for the rehabilitation of a pipeline, especially for clearing a branching-off in a pipeline system rehabilitated by means of a tubular liner, comprising at least one clearing device, which is movably mounted by at least one degree of freedom, and a slope sensor located on the clearing device.

Apparatuses for removing a circumferential seal from the internal wall of a pipe comprise a tool for forward movement into an entry end of the pipe towards and into contact with the seal in the pipe, the tool having means for engaging the seal with the forward movement and with further forward movement of the tool release of the seal from the pipe wall and means for capturing and retaining the released seal with still further forward movement whereby on subsequent rearward movement of the tool the seal is withdrawn from the entry end of the pipe.

Apparatuses for removing a circumferential seal from the internal wall of a pipe comprise a tool for forward movement into an entry end of the pipe towards and into contact with the seal in the pipe, the tool having means for engaging the seal with the forward movement and with further forward movement of the tool release of the seal from the pipe wall and means for capturing and retaining the released seal with still further forward movement whereby on subsequent rearward movement of the tool the seal is withdrawn from the entry end of the pipe.

A method of joining together liner sections within a polymer-lined pipe energises an induction coil inside the pipe to spot-heat part of a circumferential interface between the liner sections. This melts and fuses the polymer material locally. The induction coil is then moved along the interface to heat other parts of the interface successively above the melting temperature. An apparatus for performing the method has a power supply for energising the induction coil and a drive system for moving the energised induction coil relative to a body of the apparatus. The apparatus may be configured as a carriage that is movable along the pipe.

Reconfigurable electromagnetic pipe inspection tools are designed and assembled using optimized parameters determined using modeling. The reconfigurable tools include multiple modules connected to one another in a stackable fashion guided by optimized tool parameters customized based on well diagrams.

Reconfigurable electromagnetic pipe inspection tools are designed and assembled using optimized parameters determined using modeling. The reconfigurable tools include multiple modules connected to one another in a stackable fashion guided by optimized tool parameters customized based on well diagrams.

A pig system for transporting liquid or pasty substances two pig stations which are connected to one another by way of a pig line. The pig system includes a number of pigs. Accordingly, the two pig stations have a number of parking positions, to which a controllable media connection is respectively assigned. Appropriate activation of the media connections allows the effect to be achieved that only some of the pigs at a time shuttle back and forth between the two pig stations. Defective pigs or operational pigs that are being kept on standby in this case remain in corresponding parking positions of the two pig stations.