A pipe repair device includes a body defining a first body end, a second body end, and a middle body section therebetween; a foldable arm pivotably attached to the body to radially reposition the foldable arm relative to the body, the foldable arm comprising a first segment and a second segment, the first segment extending between the body and the second segment, wherein the second segment is substantially parallel to the body; and a locomotion subsystem configured to drive the pipe repair device through a pipe, the locomotion subsystem mounted to the second segment of the foldable arm and configured to engage an inner surface of the pipe.

A method of installing an In-Line Structure (ILS) to a fluid-filled pipeline extending from a reel, over an aligner, and through a lay-tower during offshore reeling, the pipeline having an oblique part from the reel to the aligner, and a vertical part from the aligner through the lay-tower, including at least the steps of: (a) draining fluid in the fluid-filled pipeline from the vertical part of the pipeline to create a drained portion of the vertical part of the pipeline up to and around the aligner; (b) cutting the pipeline at or near the draining of step (a) to create upper and lower open ends of the pipeline; (c) installing the In-Line Structure to at least the upper open end of the pipeline; (d) locating a vent hose through a vent port in the In-Line Structure; (e) adding fluid into the drained portion of the pipeline and venting air from the drained portion of the pipeline through the vent hose to wholly or substantially fill the drained portion of the pipeline with the fluid.

A method of installing an In-Line Structure (ILS) to a flooding fluid-filled pipeline extending from a reel, over an aligner, and through a lay-tower during offshore reeling, the pipeline having an oblique part from the reel to the aligner, and a vertical part from the aligner through the lay-tower, including the steps of: (a) draining the flooding fluid from the vertical part of the pipeline to create a drained portion of the vertical part of the pipeline up to and around the aligner; (b) cutting the pipeline at or near the draining of step (a) to create upper and lower open ends of the pipeline; (c) installing a pig into the upper open end; (d) moving the pig through the pipeline to reach a flooding fluid-filled part of the pipeline; (e) adding flooding fluid into the flooding fluid-filled part of the pipeline to reverse the movement of the pig in step (d) and to wholly or substantially refill the drained portion of the pipeline; and (f) installing the In-Line Structure (ILS) to at least the upper open end of the pipeline.

A method is described for minimizing material mixing of a first fluid material and a second fluid material in a material processing system that includes a pipeline. The method includes introducing into an upstream portion of the pipeline a sufficient amount of a material mixing inhibitor using, in some instances a cartridge for delivery of the material mixing inhibitor composition to the material processing system.

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 pipeline pig launching system for a gas pipeline, including a pressure bottle, a two-chambered drip leg, and a pig launcher barrel. Condensate from the gas in the pipeline collects in the upper chamber of the drip leg and flows through an equalizer line to the lower chamber. The pressure bottle receives gas from the pipeline, and has an adjustable pressure relief valve at its outlet. When the pressure bottle reaches a preset level the relief valve opens and pressurized gas enters the lower chamber of the drip leg and forces the condensate out of the drip leg to an inlet of the pig launcher barrel. The pig in the launcher barrel is then pushed into the pipeline at a point downstream from the drip leg. A booster line may also be included in the system to provide a direct connection between the outlet of the pressure bottle and the inlet of the pig launcher barrel.

A method for reducing the pressure of fluid within subsea equipment. The method includes the steps of: (a) providing a pipe, (b) laying the pipe on the sea floor, (c) providing a connector, (d) connecting the pipe to the subsea equipment via the connector, and (e) extracting fluid from the subsea equipment through the connector and into the pipe. Apparatus for reducing the pressure of fluid within subsea equipment by extracting fluid from the subsea equipment.

Example aspects of a pipe repair device and a method for repairing a pipeline are disclosed. The pipe repair device can comprise a body; a sensor attached to the body for detecting the leak in the pipe; a transport mechanism attached to the body for transporting the pipe repair device along the pipe; and a repair mechanism comprising a repair material for repairing the leak.

A pipeline pig launching system for a gas pipeline, including a pressure bottle, a two-chambered drip leg, and a pig launcher barrel. Condensate from the gas in the pipeline collects in the upper chamber of the drip leg and flows through an equalizer line to the lower chamber. The pressure bottle receives gas from the pipeline, and has an adjustable pressure relief valve at its outlet. When the pressure bottle reaches a preset level the relief valve opens and pressurized gas enters the lower chamber of the drip leg and forces the condensate out of the drip leg to an inlet of the pig launcher barrel. The pig in the launcher barrel is then pushed into the pipeline at a point downstream from the drip leg. A booster line may also be included in the system to provide a direct connection between the outlet of the pressure bottle and the inlet of the pig launcher barrel.

A method of installing an exhaust tube is implemented by inserting an exhaust tube into an exhaust pipe that leads from the inside of a building to the outside thereof. Utilizing an already-placed exhaust pipe, a new exhaust tube is inserted into this exhaust pipe. The exhaust tube is installed according to a procedure of: performing, on the inside of the building, an operation of inserting a new exhaust tube into the already-placed exhaust pipe; performing, on the outside of the building, an operation of fixing the inserted exhaust tube to the exhaust pipe; and performing, on the inside of the building, an operation of connecting the fixed exhaust tube to an exhaust vent of a combustion apparatus.