Methods and apparatus for making lined pipelines utilize lined pipes and fittings attached to the ends of the lined pipes. Castellations are formed on the inner surfaces of the fittings. First and second ends of a fit-up sleeve are inserted into the fittings on the ends of first and second lined pipes and the first and second ends of the fit-up sleeve force portions of the liners within the pipes into engagement with the castellations on the inner surfaces of the fittings. The fittings are then attached to each other to join the first and second lined pipes together.
Methods and apparatus for making lined pipelines in which pipes are joined together. Within the joint there is a fit-up sleeve which forces liners against respective pipes and provides corresponding seals. Other seals can be provided by inserting sealing rings which force different portions of the liners against different portions of the pipes. The fit-up sleeve and sealing rings force the liners against castellations which prevent movement of the liners. The fit-up sleeve may cooperate with insertion rims on the pipes to provide very accurate spacing, or touching edges which can be desirable if automatic welding is employed. The seals provided by the fit-up sleeve also eliminate backdraughts and assist welding operations. Furthermore, the fit-up sleeve permits pigging through the pipe joint and therefore along the length of the resulting lined pipeline. It is foreseen that the need for CRA components and CRA welding can be largely if not wholly dispensed with.
F16L 37/091 - Couplings of the quick-acting type in which the connection between abutting or axially-overlapping ends is maintained by locking members combined with automatic locking by means of a ring provided with teeth or fingers
An improved pipe liner and associated methods, including a method of manufacturing the improved pipe liner and a method of lining a host pipe with such a pipe liner. The invention solves the problem of gas permeation through a polymer liner in hydrocarbon service which can result in corrosion of the host pipe and can also cause liner collapse. Corrosion occurs due to contact between corrosive species and the host pipe itself. Gases (307) can also accumulate in an annulus between or within the liner (305) and the host pipe (303) and expand during operational de-pressurisation of the pipeline, causing collapse of the liner. The improved pipe liner comprises a barrier layer (311), which prevents permeation through the liner, surrounding an inner polymer pipe (305A) and optionally covered by an outer polymer pipe (305B). The inner polymer pipe is porous which permits free movement of gas between the internal bore (302) of a lined pipe and the barrier layer, so as to prevent accumulation of gases anywhere in the lined pipe, while ensuring that gases do not permeate to, and damage, the host pipe. The liner can be inserted using Swagelining, roll-down, or any other suitable close-fit lining techniques, without compromising the effectiveness of the barrier layer.
F16L 9/147 - Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups comprising only layers of metal and plastics with or without reinforcement
B29C 63/42 - Lining or sheathing, i.e. applying preformed layers or sheathings of plasticsApparatus therefor by liberation of internal stresses using tubular layers or sheathings
B29C 63/46 - Lining or sheathing, i.e. applying preformed layers or sheathings of plasticsApparatus therefor by liberation of internal stresses of internal surfaces
B29K 105/00 - Condition, form or state of moulded material
B29K 105/04 - Condition, form or state of moulded material cellular or porous
Methods and apparatus for making lined pipelines in which pipes are joined together by attaching fittings at their ends and joining the fittings together. Within the joint there is a fit-up sleeve which forces liners against respective fittings and provides corresponding seals. Other seals can be provided by inserting sealing rings which force different portions of the liners against different portions of the fittings. The fit-up sleeve and sealing rings may force the liners against castellations which prevent movement of the liners. The fit-up sleeve may cooperate with insertion rims on the fittings to provide very accurate spacing, or touching edges which can be desirable if automatic welding is employed. The seals provided by the fit-up sleeve also eliminate backdraughts and assist welding operations. Furthermore, the fit-up sleeve permits pigging through the pipe joint and therefore along the length of the resulting lined pipeline. It is foreseen that the need for CRA components and CRA welding can be largely if not wholly dispensed with.
Methods and apparatus for making lined pipelines in which pipes are joined together by attaching fittings at their ends and joining the fittings together. Within the joint there is a fit-up sleeve which forces liners against respective fittings and provides corresponding seals. Other seals can be provided by inserting sealing rings which force different portions of the liners against different portions of the fittings. The fit-up sleeve and sealing rings may force the liners against castellations which prevent movement of the liners. The fit-up sleeve may cooperate with insertion rims on the fittings to provide very accurate spacing, or touching edges which are desirable with automatic welding. The seals also eliminate backdraughts and assist welding operations. The fit-up sleeve permits pigging through the pipe joint and therefore along the length of the resulting lined pipeline. The need for CRA components and CRA welding can be largely or wholly dispensed with.
A pipe liner and associated methods, including a method of manufacturing the liner and a method of lining a host pipe. The invention solves the problem of gas permeation through a polymer liner in hydrocarbon service which can result in corrosion of the host pipe and cause liner collapse. Corrosion occurs due to contact between corrosive species and the host pipe. Gases can accumulate in an annulus between or within the liner and the host pipe and expand during operational de-pressurisation of the pipeline, causing collapse of the liner. The pipe liner comprises a barrier layer surrounding an inner polymer pipe and optionally covered by an outer polymer pipe. The inner polymer pipe is porous to prevent accumulation of gases anywhere in the lined pipe, while ensuring that gases do not permeate to, and damage, the host pipe. The liner can be inserted using suitable close-fit lining techniques.
F16L 9/147 - Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups comprising only layers of metal and plastics with or without reinforcement
F16L 11/04 - Hoses, i.e. flexible pipes made of rubber or flexible plastics
F16L 55/165 - Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe being inserted in the damaged section
F16L 58/10 - Coatings characterised by the materials used by rubber or plastics
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