A remediation pig for cleaning a pipeline of wax or paraffin mechanically, with heating, and/or with jetting, comprising a body having an axis, an impeller mounted in the body to receive power from the flowing fluid within the pipeline, wheels mounted on the body for contacting the internal bore of the pipeline, the wheels being powered by the power received from the impeller and being mounted in a skewed position relative to a plane perpendicular to the axis such that as the wheels roll on the internal bore the remediation pig will move along the pipeline.

A compact subsea pig launcher comprises a tubular magazine for holding a plurality of pipeline pigs in longitudinal succession ready for launching successively into a subsea pipeline. The magazine is shaped to define at least one turn such as a coil around an upright axis. Thus, a series of pigs are stored in longitudinal succession along a path that is curved in plan view around the upright axis. During launching, at least one of the series of pigs is advanced along the path with angular movement around the upright axis.

Embodiments relate generally to systems and methods for decommissioning a pipeline. The system may comprise a mechanical assembly and chemical assembly. The mechanical assembly may include a main body and contact assembly. When the mechanical assembly is provided in the pipeline, the contact assembly is configurable to contact with the pipeline's interior wall. The chemical assembly may be arranged serially in line with the mechanical assembly. The chemical assembly may include a front section having a cross-sectional portion configurable to resemble the cross-section of the pipeline. The chemical assembly may also include a rear section having a cross-sectional portion. The front and rear sections may be arranged in such a way that, when the chemical assembly is provided in the pipeline, the cross-sectional portions of the front and rear sections cooperate with the pipeline's interior wall to form a chamber operable to receive and house a removal medium.

A conduit cleaning device is provided and includes a center structure having a center structure wall, a center structure top and a center structure bottom, wherein the center structure wall and center structure top define a center structure cavity and a center structure opening communicated with the center structure cavity. Additionally, a plurality of outer structures is provided, wherein the plurality of outer structures are associated with the center structure wall to extend out of and away from an outer surface of the center structure wall, wherein the plurality of outer structures are disposed in an inclined fashion between the center structure bottom and the center structure top and arranged along the outer surface of the center structure wall to form a helical pattern.

System and method for decommissioning a pipeline. The system comprises mechanical and chemical assemblies. The mechanical assembly includes a main body and a contact assembly. When the mechanical assembly is provided in the pipeline, the contact assembly is configurable to contact with the interior wall of the pipeline. The chemical assembly is arranged serially in line with the mechanical assembly. The chemical assembly includes a front section having a cross-sectional portion and a rear section having a cross-sectional portion. The front and the rear section are arranged in such a way that the cross-sectional portions of the front and the rear section cooperate with the interior wall of the pipeline to form a chamber to house a removal medium. The system and method can effectively and efficiently remove most or all of such residual mercury and/or other toxic substance from the interior wall of the pipeline before abandonment.

Methods, systems, and computer program products for in-pipeline maintenance, delivery and management of sensors are provided herein. An exemplary computer-implemented method includes detecting a sensor within a pipeline via an in-pipeline sensor management system, determining a path for the in-pipeline sensor management system to travel to the detected sensor, and automatically attaching the in-pipeline sensor management system to the detected sensor upon a determination that the in-pipeline sensor management system has completed the path and reached the detected sensor. The method also includes determining maintenance operations to be performed on the detected sensor based on real-time data pertaining to the sensor and historical operation records pertaining to the detected sensor. Further, the method includes performing the maintenance operations, via the in-pipeline sensor management system, on the detected sensor, and automatically detaching the in-pipeline sensor management system from the detected sensor upon determining that the maintenance operations have been completed.

An annular seal for a conduit pig includes an annular diaphragm and a separate lead support structure. The annular diaphragm is devoid of internal supports and therefore quite flexible. However, the lead support structure supports the annular diaphragm such that a piston effect can be generated through the annular seal. A brush portion for a conduit pig may include forwardly raked bristles.

Apparatus and method for cleaning the inner surface of a pipeline from deposits and for forming a protective coating are disclosed. The apparatus includes a cleaning tool which is caused to move in the interior of the pipeline by a flow of a fluid, the cleaning tool comprising a plurality of guide discs engaging the pipeline surface and mounted along a longitudinal axis of the cleaning tool, an anode positioned inside the cleaning tool, and an impressed current source electrically connected to the anode and the interior of the pipeline, the interior of the pipeline acting as a cathode when current is applied from the current source so that ions flow from the anode, through the fluid, to the interior of the pipeline.

Apparatus and method for cleaning the inner surface of a pipeline from deposits and for forming a protective coating are disclosed. The apparatus includes a cleaning tool which is caused to move in the interior of the pipeline by a flow of a fluid, the cleaning tool comprising a plurality of guide discs engaging the pipeline surface and mounted along a longitudinal axis of the cleaning tool, an anode positioned inside the cleaning tool, and an impressed current source electrically connected to the anode and the interior of the pipeline, the interior of the pipeline acting as a cathode when current is applied from the current source so that ions flow from the anode, through the fluid, to the interior of the pipeline.

Embodiments relate generally to systems and methods for decommissioning a pipeline. The system may comprise a mechanical assembly and chemical assembly. The mechanical assembly may include a main body and contact assembly. When the mechanical assembly is provided in the pipeline, the contact assembly is configurable to contact with the pipeline's interior wall. The chemical assembly may be arranged serially in line with the mechanical assembly. The chemical assembly may include a front section having a cross-sectional portion configurable to resemble the cross-section of the pipeline. The chemical assembly may also include a rear section having a cross-sectional portion. The front and rear sections may be arranged in such a way that, when the chemical assembly is provided in the pipeline, the cross-sectional portions of the front and rear sections cooperate with the pipeline's interior wall to form a chamber operable to receive and house a removal medium.