The present invention provides systems, methods and devices for sealing and/or curing a leakage at a remote site in a pipe, the system including a multiplicity of polymeric carrier plugs of a deformable material including pores, at least one sealant composition disposed in the pores; and a carrier liquid composition adapted to transport the multiplicity of polymeric carrier plugs to a site of the leakage, wherein at least some of the multiplicity of polymeric carrier plugs polymeric carrier plugs are adapted to transport the at least one sealant composition from a first site in the carrier liquid composition to a remote site and to seal the leakage at the remote site.

The present invention provides methods and methods for curing a leakage in a pipeline, the method including at least one gel pig and at least one sealant composition; wherein the at least one gel pig and the at least one sealant composition form a pig train, adapted to move along the pipeline to a region of the leakage and to seal the leakage.

The present invention provides methods and methods for curing a leakage in a pipeline, the method including at least one gel pig and at least one sealant composition; wherein the at least one gel pig and the at least one sealant composition form a pig train, adapted to move along the pipeline to a region of the leakage and to seal the leakage.

A pig for internal pipeline inspection has a body of resiliently compressible material extending along a central longitudinal axis. At least one strain gauge is embedded in the material of the body. The or each strain gauge extends transversely with respect to the central longitudinal axis and is arranged to deflect and elongate longitudinally with longitudinal deflection of a forward end of the body.

A pig for internal pipeline inspection has a body of resiliently compressible material extending along a central longitudinal axis. At least one strain gauge is embedded in the material of the body. The or each strain gauge extends transversely with respect to the central longitudinal axis and is arranged to deflect and elongate longitudinally with longitudinal deflection of a forward end of the body.

The present invention provides a method for sealing a leakage at a remote site in a pipe, the method including introducing a fluid carrier composition including a hardener, a resin and at least one of a multiplicity of plugging devices and a multiplicity of cut fibers into the pipe at the first site under pressure and allowing the fluid carrier to transport the at least one of the multiplicity devices and the multiplicity of fibers to the remote site, wherein the at least of the multiplicity of devices and the multiplicity of the cut fibers penetrates the leakage thereby sealing and curing the leakage.

A pigging device of this disclosure includes a wear indicator configured to visually indicate an amount of material loss of a pipe wall contacting surface. The material loss may be symmetrical or asymmetrical. The pipe wall contacting surface may be any shape suitable, including but not limited to spherical-shaped, cylindrical-shaped, cup-shaped, disc-shaped, conical-shaped, frusto-conical shaped, bowl-shaped, and bullet-shaped. In some embodiments, the pigging device is a pipeline pig such as but not limited to a spherical foam pig, cylindrical-shaped foam pig, or a bullet-shaped foam pig. In other embodiments, the pigging device is a component of a pipeline pig such as but not limited to a cup or disc arranged about a body of the pipeline pig. The pigging device may also be a pigging disc element. The pigging device may be made of any suitable material, including but not limited to an elastomer such as urethane.

A pigging device of this disclosure includes a wear indicator configured to visually indicate an amount of material loss of a pipe wall contacting surface. The material loss may be symmetrical or asymmetrical. The pipe wall contacting surface may be any shape suitable, including but not limited to spherical-shaped, cylindrical-shaped, cup-shaped, disc-shaped, conical-shaped, frusto-conical shaped, bowl-shaped, and bullet-shaped. In some embodiments, the pigging device is a pipeline pig such as but not limited to a spherical foam pig, cylindrical-shaped foam pig, or a bullet-shaped foam pig. In other embodiments, the pigging device is a component of a pipeline pig such as but not limited to a cup or disc arranged about a body of the pipeline pig. The pigging device may also be a pigging disc element. The pigging device may be made of any suitable material, including but not limited to an elastomer such as urethane.

The present invention relates to a new use of foaming products for the production of a compact foam pig, by means of the forced interaction of gas, water and product, capable of moving huge quantities of water accumulated in the gas production pipelines. The water removal takes place in very quick periods of time and allows an important decrease in the pressure drops with consequent quick increase in the produced gas quantities.

The present invention relates to a new use of foaming products for the production of a compact foam pig, by means of the forced interaction of gas, water and product, capable of moving huge quantities of water accumulated in the gas production pipelines. The water removal takes place in very quick periods of time and allows an important decrease in the pressure drops with consequent quick increase in the produced gas quantities.