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Hydraulically activated pipeline pigging

About: Hydraulically activated pipeline pigging is a research topic. Over the lifetime, 126 publications have been published within this topic receiving 1511 citations.


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Patent
28 Aug 1991
TL;DR: In this paper, a process to clear pipelines carrying fluids viscous and/or rich in organic residues includes the introduction of a heating element inside a pipeline carrying the fluids through a coupling spool which is intercalated in the fluid-carrying pipeline.
Abstract: A process to clear pipelines carrying fluids viscous and/or rich in organic residues includes the introduction of a heating element inside a pipeline carrying the fluids through a coupling spool which is intercalated in the fluid-carrying pipeline. Simultaneously an electric current is applied to the heating element so that the heat generated by the heating element is transmitted to the viscous fluid or to the compacted residual mass inside the fluid-carrying pipeline, causing the detachment of those residues from the internal wall of the pipeline and re-establishing the conditions for fluid flow.

273 citations

Journal ArticleDOI
TL;DR: In this paper, the pig position, optimum flow rate in upstream flow and the time that the pig reaches the end of the pipeline are obtained from the simulation results with the field data of liquid flow through the pipeline from KG to AG located in Iran.

82 citations

Patent
01 Nov 1991
TL;DR: In this article, an electric heating system for subsea flexible pipelines is described, including the circulation of an electric current which runs through the metallic armorings of the flexible pipeline, generating energy and dissipating a certain amount of heat to the pipeline and to the fluid contained inside same.
Abstract: This invention refers to an electric heating system for subsea flexible pipelines (13) including the circulation of an electric current which runs through the metallic armorings (31) of the flexible pipeline (13), generating energy and dissipating a certain amount of heat to the pipeline (13) and to the fluid contained inside same, maintaining the temperature differential between the environment and the production line, so as not to interrupt the fluid flow.

45 citations

Patent
24 Jul 1996
TL;DR: An apparatus and a method for cleaning the inner wall of a pipeline, which includes providing a pig component, of the type having a pig body, a plurality of spacers around the pig body and a valving member on the forward end of the pig for moving to the open position to allow the fluid to flow to the pressure nozzles when sufficient fluid pressure is placed on the valving members as discussed by the authors.
Abstract: An apparatus and a method for cleaning the inner wall of a pipeline, which includes providing a pig component, of the type having a pig body, a plurality of spacers around the pig body, the spacers making contact with an inner surface of the pipeline wall, a forward end of the pig having a plurality of pressure nozzles positioned thereon for allowing fluid under pressure to flow therefrom onto the inner wall of the pipeline; a bore through the pig body extending from an opening in a rear end of the pig, to the forward end of the pig; a valving member on the forward end of the pig for moving to the open position to allow the fluid to flow to the pressure nozzles when sufficient fluid pressure is placed on the valving member; providing a fluid under pressure, such as water or chemicals, to the rear and front of the pig, the fluid forcing the pig to move forward under pressure; encountering an obstruction, such as paraffin, formed along the inner wall of the pipeline fo such amount to hinder the forward movement of the pig through the pipeline; increasing the pressure on the pig sufficient to moving the valving member to the open position for allowing the fluid under pressure to spray from the pressure nozzles against the paraffin obstruction sufficiently to dislodge the paraffin from the wall of the pipeline; resuming the speed of the pig after the paraffin obstruction has been dislodged so that the pig forces the paraffin through and out of the end of the pipeline.

43 citations

Patent
Matthews Jamie Frank1
16 Feb 1972
TL;DR: In this paper, an underwater pipeline is recovered from the bottom of a body of water by inserting a pigging element into the end of the pipeline, injecting a gas into the line behind the pigging elements until a section of the line sufficiently long to reach to the surface of the water has been voided of liquids.
Abstract: The end of an underwater pipeline is recovered from the bottom of a body of water by inserting a pigging element into the end of the pipeline, injecting a gas into the end of the line behind the pigging element until a section of the line sufficiently long to reach to the surface of the body of water has been voided of liquids, and thereafter lifting the end of the line to the water''s surface. Apparatus which is particularly useful in such recovery operations includes a housing closed at one end and open at the other, a gas inlet in the housing near the closed end, means near the open end for engaging the end of a pipe and forming a seal therewith, a pigging element in the housing between the gas inlet and open end, and means for attaching a cable to the end of the pipeline for lifting the pipeline to water''s surface.

42 citations

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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20171
20162
20146
20135
20127
20117