Embodiments of a pipeline pig (10) of this disclosure and method of its use include a pressure-equalizing transmitter cavity system. Excluding sensors(S) and other electronic circuitry, the pipeline pig may be an all polyurethane pig. A plug (15) located at the rearward end (41) of the transmitter cavity (13) includes a passageway (25) that permits pipeline product to flow into the transmitter cavity. The plug is received by a flange (17) which may have a different harness than that of the plug. When in an intended use, the pipeline pig is inserted into the pipeline at one end and retrieved from the pipeline at another end. As the pipeline pig traverses the pipeline under differential pressure, pipeline pressure and temperature data may be collected and the location of the pipeline pig may be tracked. Pressure within the transmitter cavity is equalized with that of the pipeline product flow.

A bi-directional pig apparatus for removing wax and hydrate deposits in subsea hydrocarbon production flowlines including a pig arranged for movement inside a pipe, the pig having a tubular body and one or more magnets arranged in a circumferential wall of said body, each of the one or more magnets includes an elongated bar having a succession of teeth and slots, arranged such that the succession of teeth are facing radially outwards. The apparatus having a through-going opening between opposite ends of said tubular body to allow fluids (F) in the pipe to flow through and propulsion means arranged and configured for imparting a motive force to the pig, whereby the pig is movable inside the pipe.

A pipeline pig for wetting the top inner surface of a pipeline comprising a pig body, one or more circular brushes attached to the pig body, and means for rotating the one or more circular brushes as the pig moves through the pipeline.

An improved apparatus and methodologies of use for cleaning debris and contaminants from an interior surface or sidewall of a fluid-carrying conduit, such as a pipeline, are provided. More particularly, an apparatus and methodologies of use are provided, wherein the apparatus or pipeline pig operates bi-directionally and comprises counter-rotating cleaning elements that are operative to enhance removal of debris and contaminants from the pipeline.

In one aspect, the present invention relates to a method for displacing fluid from a pipe. The method includes engaging a fluid-displacement system with the pipe. A displacement agent is pumped into the pipe via the fluid-displacement system. Fluid present within the pipe is displaced by the displacement agent. The pipe is manipulated in a desired manner.

In one aspect, the present invention relates to a method for displacing fluid from a pipe. The method includes engaging a fluid-displacement system with the pipe. A displacement agent is pumped into the pipe via the fluid-displacement system. Fluid present within the pipe is displaced by the displacement agent. The pipe is manipulated in a desired manner.

A pig is provided for passing through a pipeline having a pipeline wall. The pig comprises at least one functional unit for cleaning the pipeline and/or for receiving pipeline information. The pig also comprises at least one magnet unit which is provided for magnetizing the pipeline wall, and which has a plurality of magnets. The magnet unit has a plurality of segments each with at least one magnet. The magnetizing devices of mutually adjacent segments are angled at least by approximately 90 to one another.

A method of treating or maintaining an apparatus is achieved by subjecting at least one treated component of an apparatus to electrochemical corrosion protection. The treated component has surfaces treated with a coating of a treatment composition of a colloidal particle dispersion having inorganic nanoparticles with an average particle size from 500 nm or less that exhibit properties of Brownian motion. At least some of the inorganic nanoparticles are ionically charged nanoparticles, and wherein at least some of the ionically charged nanoparticles reside on the surfaces when the at least one treated component of an apparatus is subjected to electrochemical corrosion protection.

A method to reduce slugging in a pipeline, including flowing a fluid flow through a pipeline having a fluid flow path extending therethrough and determining a presence of a slug within the fluid flow path of the pipeline. Launching a chokeable pig into the fluid flow path, anchoring the chokeable pig at a predetermined location within the fluid flow path, and adjusting the pressure drop through the pipeline.

A pipe cleaning device includes a main body, a brush module including a plurality of brushes and a plurality of connecting members, a gear box, and a driving module. The gear box includes an input gear, a stationary gear, a plurality of output gears, and a plurality of driven gears. The plurality of output gears form a first meshing with the input gear and form a second meshing with the stationary gear. Each of the plurality of driven gears form a third meshing with a corresponding one of the plurality of output gears. Each of the plurality of brushes rotates in a same rotational direction and at a same angular velocity as the plurality of driven gears, and orbits in a same direction and at a same angular velocity as the plurality of driven gears.