A pipeline plug includes a plug body. The plug body includes an outer housing. The interior of the outer housing defines a pressure vessel. The pipeline plug includes a pressure head coupled to the plug body, a seal assembly, a gripper assembly, a movable head, and an actuation mechanism. The actuation mechanism includes a leadscrew, the leadscrew coupled to the movable head. The actuation mechanism includes a captive nut, the captive nut positioned within the pressure vessel. The actuation mechanism includes a motor, the motor operatively coupled to the captive nut and adapted to rotate the captive nut.

A pipeline plug includes a plug body. The plug body includes an outer housing. The interior of the outer housing defines a pressure vessel. The pipeline plug includes a pressure head coupled to the plug body, a seal assembly, a gripper assembly, a movable head, and an actuation mechanism. The actuation mechanism includes a leadscrew, the leadscrew coupled to the movable head. The actuation mechanism includes a captive nut, the captive nut positioned within the pressure vessel. The actuation mechanism includes a motor, the motor operatively coupled to the captive nut and adapted to rotate the captive nut.

The present disclosure relates to a pig which is insertable at least partly within a fabric liner sleeve located in a duct and which is capable of heating the liner sleeve in situ in the duct to melt thermoplastic material of the liner sleeve to form, on subsequent cooling of the melted thermoplastic material, a rigid liner in the duct. The pig comprises: a gas inlet (1008) for receiving pressurised gas; a heating chamber (17) in which the pressurised gas is heated; and a gas outlet (1009) via which pressurised gas heated in the heating chamber (17) is deliverable to the fabric liner sleeve. The pig comprises a tree diffuser (15) located in the heating chamber (17) via which pressurised gas can be delivered into the heating chamber (17). The tree diffuser (15) has a plurality of branch pipes (A,B,C) each comprising at least one gas delivery aperture, each branch pipe (A,B,C) extending outwardly from a trunk portion of the tree diffuser (15).

The present disclosure relates to a pig which is insertable at least partly within a fabric liner sleeve located in a duct and which is capable of heating the liner sleeve in situ in the duct to melt thermoplastic material of the liner sleeve to form, on subsequent cooling of the melted thermoplastic material, a rigid liner in the duct. The pig comprises: a gas inlet (1008) for receiving pressurised gas; a heating chamber (17) in which the pressurised gas is heated; and a gas outlet (1009) via which pressurised gas heated in the heating chamber (17) is deliverable to the fabric liner sleeve. The pig comprises a tree diffuser (15) located in the heating chamber (17) via which pressurised gas can be delivered into the heating chamber (17). The tree diffuser (15) has a plurality of branch pipes (A,B,C) each comprising at least one gas delivery aperture, each branch pipe (A,B,C) extending outwardly from a trunk portion of the tree diffuser (15).

A pipe inspection and/or maintenance system is provided, having a control device, an image recording device and a feed device. The image recording device can be mechanically coupled to the feed device, and the image recording device and the feed device are operatively connected to one another via a first communication link. The feed device and the control device are operatively connected to one another via a second communication connection. The feed device has a processing unit which is operatively connected to the first communication connection and to the second communication connection, and the processing unit is adapted to receive image data from the image recording device by way of the first communication link, to process the received image data, and to transmit the processed image data to the control device by way of the second communication link. A corresponding method is also provided.

A pipe inspection and/or maintenance system is provided, having a control device, an image recording device and a feed device. The image recording device can be mechanically coupled to the feed device, and the image recording device and the feed device are operatively connected to one another via a first communication link. The feed device and the control device are operatively connected to one another via a second communication connection. The feed device has a processing unit which is operatively connected to the first communication connection and to the second communication connection, and the processing unit is adapted to receive image data from the image recording device by way of the first communication link, to process the received image data, and to transmit the processed image data to the control device by way of the second communication link. A corresponding method is also provided.

A pipeline sphere is shown which houses an electronics package. The sphere is formed as a hollow elastomeric body having a predetermined wall thickness and an initially void interior. A carrier tube is positioned within the initially void interior of the sphere and is supported by oppositely arranged carrier plates which are themselves embedded within oppositely arranged end openings of the sphere. A removable inflation valve is contained in one of the valve plates at a first end of the carrier tube. The carrier tube has a plurality of apertures formed through its wall to enable inflating or deflating the sphere. One electronics package that can be used is an electrical tracking device.

A pipeline sphere is shown which houses an electronics package. The sphere is formed as a hollow elastomeric body having a predetermined wall thickness and an initially void interior. A carrier tube is positioned within the initially void interior of the sphere and is supported by oppositely arranged carrier plates which are themselves embedded within oppositely arranged end openings of the sphere. A removable inflation valve is contained in one of the valve plates at a first end of the carrier tube. The carrier tube has a plurality of apertures formed through its wall to enable inflating or deflating the sphere. One electronics package that can be used is an electrical tracking device.

A pipe inspection robot includes first and second bodies connected by a connection mechanism, at least two legs connected to the first body, and at least two additional legs connected to the second body, each of the at least two legs and the at least two additional legs including a linkage connected at one end to the first or second body, and a pipe engaging member connected at another end of the linkage; wherein each linkage is configured to operate between a stowed position, in which the pipe engaging member is disposed adjacent the first or second body, and an extended position, in which the linkage is adapted to cause the pipe engaging member to slide against an inner surface of a pipe.

A caliper pig for detecting geometrical deformation of a pipeline is disclosed. The caliper pig includes a body and a first sensor arm assembly. The first sensor arm assembly includes a primary caliper sensor ring adapted to be mounted on the body. Further, the first sensor arm assembly includes a plurality of sensor arms adapted circumferentially distributed on the primary caliper sensor ring. Each of the plurality of sensor arms includes a sensing arm adapted to be in contact with an internal surface of the pipeline and a pair of magnets adapted to rotate along the sensing arm. Each of the plurality of sensor arms includes a sensing unit configured to detect a change in magnetic field based on the movement of the sensing arm. The sensing unit is configured to generate an output indicative of an angle of deflection of the sensing arm while traversing on the internal surface of the pipeline.