Abstract: A pig towing device is adapted for movement through a conduit having bends and open T intersections. The pig has a front leading cup and a rear trailing cup adapted to seal with the conduit for propelling the device through the conduit. The leading and trailing cups are spaced apart a predetermined distance to maintain the seal with the conduit as the pig towing device negotiates past the open T intersections. The pig towing device has a flexible body interconnecting the front leading cup and the rear trailing cup. The flexible body is urged normally into a straight position extending along a central axis thereof to maintain the front leading cup and the rear trailing cup spaced apart by the predetermined distance. The flexible body has predetermined limited flexibility permitting it to bend relative to the central axis as the pig towing device negotiates through the bends in the conduit.

Abstract: The present invention provides a device for cleaning tubes, in particular the internal surfaces of tubes in heat exchange systems. The device comprises a mass (2) with an optionally provided central through-hole (10) disposed thereon, and optionally provided a plurality of protrusions (20, 21) mounted and/or moulded on the mass (2). The through-hole (10) is preferably of a conical shape-like configuration. A plurality of first protrusions (20) is disposed in a fin-like arrangement on the mass (2). A plurality of second protrusions (21) is disposed in a spiral arrangement on the mass (2), and the lengths of the second protrusions (21) are relatively longer than the length of the first protrusions (20). The mass may consist of an asymmetrically positioned weighted core (15) of different weights and sizes to provide a variety of relative density to the device and to serve as a geometrical manipulation to impart rotational momentum and random dynamic motion to the device.

Abstract: The present invention relates to a cleaning system that does not require the use of electrical energy to power electrical motor or pump and the like to clean condenser fins but instead uses differential in pressure between two separated chambers and magnets.

Abstract: An installation for and a method for driving a submarine pipeline scraper, wherein one of the ends of the pipeline has a launch device and the other end has a receiving device. The scraper defines an upstream chamber and a downstream chamber. It can be launched inside the pipeline from the launch device in the direction of the receiving device, allowing water to enter through the launch device in order to subject the upstream chamber to hydrostatic pressure. The receiving device is identical to the launch device, such that water can enter through the receiving device in order to balance the pressure of the two chambers, and also enables a fluid to be injected into the downstream chamber to drive the scraper toward the launch device.

Abstract: A bidirectional bristle pig provides a means for collapsing or restraining the bristles so that the pig may be used in a reciprocating manner or, when the pig becomes stuck, the pig may be easily retrieved in a direction opposite that of the initial direction of travel. The bristle pig has at least one set of outwardly projecting cleaning wires or bristles located toward one end of the pig body and a sliding collar. The sliding collar moves between a first position and a second position to restrain the bristles at the desired leading end of the pig and forces the bristles downward and away from the inner wall surface of the pipeline. In the restrained state, the bristles no longer interfere with the movement of the pig in the desired direction. The sliding collar may move in response to pipeline pressure or may include a tether line.

Abstract: The polisher shuttle serves to polish the inside walls of cylindrical tubes, in particular tubes for medical use. It comprises radial projections that are flexible along the axial direction, suitable for polishing the inside walls of tubes merely by relative movement between the shuttle and the tube, the shuttle passing inside the tube. In a longitudinal section, the sections of the projections form a series of separate undulations that are long and thin in the radial direction. The polishing method made possible by the shuttle is particularly simple, since a single pass of the shuttle can suffice for performing polishing; the method is thus fast and easy to automate, e.g. in a polisher device of the invention.

Abstract: A portable device for extracting a pig from a pipeline which uses a lifting means to raise or lower the device and wheels or other suitable means to allow for the device to be easily and quickly moved into position with minimal man power improving the efficiency and safety of the pig extraction process.

Abstract: A tracking system for use with a pipeline includes a scraper having signal generation capability for generating acoustic signals, a plurality of acoustic pressure sensors positioned at intervals along the path travelled by the scraper, and a plurality of local processors positioned at intervals along the path travelled by the scraper. Each of the local processors is in communication with a respective acoustic pressure sensor. A central processor is in communication with the local processors and determines the location of the scraper using time-stamped acoustic signals received by the pressure sensors and a speed of sound in a fluid within the pipeline.

Abstract: A cleaning and obstruction locating pipeline pig according to this invention includes a magnetic nose bumper at its forward end and a disc located in the central bypass flow passageway that prevents product from flowing through the central bypass flow passageway while the pig is travelling forward in the pipeline. If debris ahead of the pig causes the pig to become stuck in the pipeline, product flow pressing upon the disc ruptures the disc, thereby allowing product to flow through the central bypass flow passageway until the pig is located and removed from the pipeline. The pig may also be used to locate a previously launched but stuck pipeline pig.

Abstract: A polymerisation reactor (1) comprising a circulation loop (2), an inlet for raw material (3), an outlet (5), driving means for (6) circulating a reactor charge within the circulation loop (2), and a pig station (7) for storing, launching, and receiving cleaning pigs. The pig station (7) comprises a lid to cover an opening enabling removal of the cleaning pig. The pig station (7) is constructed as a box with a cylindrical bore connected at both ends to the circulation loop, the bore having a central part with a diameter which is larger than the inner diameter of the circulation loop. At a transitional part at the outer ends of the bore the bore diameter narrows down to be substantially equal to the inner tube diameter of the circulation vloop. Over at least a part of the inner bore substantially half of the circular cross-section is formed in the removable lid.

Abstract: An apparatus (50) is provided for use in internal cleaning of at least one pipe (10), which apparatus (50) is arranged for connection to a first pipe end (14) of the at least one pipe (10) and to a second pipe end (15) of the at least one pipe, wherein the apparatus (50) at least comprises a coupling device designed for connection to a reservoir of pressurised gas, a pressure chamber (20) for introduction of cleaning pigs (21) and a pig receiver (23) for receiving cleaning pigs (21) which have passed through the at least one pipe (10). The apparatus (50) further comprises a pressure booster (29) for pressurising a liquid fluid and at least one valve means (16,17) so as to allow a cleaning pig (21) to be driven through the at least one pipe (10) by means of either the pressurised gas or the pressurised liquid fluid.

Abstract: A pipeline pig—that moves by pressurized gas flow and provides for distribution of treating liquid subsisting in a lower portion of a pipeline—having a longitudinally extending nozzle located at a forward end of the pig, an array of helical-shaped louvers located on the discharge side of the nozzle and arranged circumferentially, and two perforated sealing elements that create a cavity that serves as a low pressure plenum. The louvers create a vortex effect and the perforated sealing elements allow vapor and liquid in front of the pig to be drawn into the cavity and discharged through the ports and back into the discharge of the nozzle. In this manner, liquid subsisting at a bottom portion of the pipeline is dispersed to achieve a complete 360° coating application of the interior cylindrical wall of the pipeline.

Abstract: A cleaning system for a water-cooled heat exchanger has a collector, a driving device, a condenser, a ball trap and multiple cleaning balls. The collector has an opening, a filtering net, three inlet holes and two outlet holes. The driving device is connected to the collector and has an outlet tube, an inlet tube and a pump. The condenser is connected to the collector and has an inlet, an outlet, multiple copper pipes, an inlet pipe and an overflow pipe. The ball trap is connected to the condenser and the collector and has an inlet end, an outlet end, an internal surface, multiple turbulent blades, an entering pipe and a discharge pipe. The cleaning balls are movably mounted in the collector, the condenser and the ball trap with the cooling water and each cleaning ball has multiple cleaning protrusions and an eccentric rib.

Abstract: A pig launcher or receiver device is designed for connection in-line in a fluid pipeline. The device has a housing (10) with a fluid flow passage therethrough and ends for connection to the pipeline. A pair of spaced rotary ball valves (19, 20) is disposed in said housing (10) for isolating an inner section (17) of the flow passage between the valves. Each ball valve having a port (26) therethrough and is rotatable between an open position in which the port is m fluid communication with the flow passage and a closed position in which it blocks the flow passage. An access passage (15) in the housing is connected to the inner section (17) of the flow passage between the ball valves and has an opening through which a pig can be inserted into, or removed from, said inner section of the flow passage by using a pig trap cartridge (22). The device is compact, safe and simple to use.

Abstract: A pipeline apparatus has a body configured to fit inside a pipeline. A flow channel is formed within the body and includes an inlet, an outlet, and a bypass channel connecting the inlet and the outlet, the inlet being configured to receive a portion of a fluid flowing through the pipeline, and the outlet being configured such that the fluid flowing through the bypass channel flows out of the bypass channel through the outlet. A flow control valve is attached to the body and has a sleeve configured to move to vary a flow rate of the fluid flowing out of the outlet. A conduit is connected between the flow control valve and a back face of the body and configured to communicate a high pressure of the fluid to the flow control valve.

Abstract: A pipeline apparatus has a body configured to fit inside a pipeline. A flow channel is formed within the body and includes an inlet, an outlet, and a bypass channel connecting the inlet and the outlet, the inlet being configured to receive a portion of a fluid flowing through the pipeline, and the outlet being configured such that the fluid flowing through the bypass channel flows out of the bypass channel through the outlet. A flow control valve is attached to the body and has a sleeve configured to move to vary a flow rate of the fluid flowing out of the outlet. A motor is provided in a chamber in the body and is configured to move the sleeve.

Abstract: Embodiments of the present invention generally relate to a bypass pig. In one embodiment, a pig for cleaning a tubular string includes a cylindrical body and two or more scrapers disposed along an outer surface of the body. The scrapers are operable to engage and clean an inner surface of the tubular string. The pig further includes a bypass formed between the scrapers. The bypass is operable to: intake a portion of propellant from a tail of the body, conduct the portion of propellant along an outer surface of the body, and discharge the portion of propellant in front of the body.

Abstract: A pipeline pig includes a plurality of inserts in spaced apart relationship around the periphery of a disk or a cup. The inserts are formed of a material that is compatible with the material of the pig, either the same material or a different material. Molded within the inserts are a random distribution of wear resistant material elements, i.e. a material that is harder than the material from which the insert is molded and harder than the material of the disk or the cup.

Abstract: The present invention is a pipeline pig for cleaning the interior of a pipeline, the pipeline pig having a longitudinal pig body with forward and rearward elastomeric propulsion members affixed to and supporting the pig body substantially concentrically in a pipeline, the propulsion members functioning to move the pig body through a pipeline by the force of fluid flow and a plurality of spaced apart elastomeric diagonally oriented scrapers radially extending from the pig body, each scraper member having a semi-circular outer peripheral edge configured and dimensioned to engage the interior wall of a pipeline to thereby scrape and clean the interior pipeline wall as the pig is moved through the pipeline and provide additional support for the pig substantially concentrically in a pipeline. Orientation of the scraper enhances scraping effectiveness by slicing through any debris buildup, separating the debris from the inner pipe wall so that it can be pushed out of the pipeline by the pig discs or cups.

Abstract: A cleaning bullet for use in a pipe or track includes a compressible body. In one embodiment, a sheet draped over the body is engageable with interior walls of the pipe or track to clean small contaminants. In another embodiment, the body is formed from an absorbent material that absorbs a fluid, such as a cleaning solution, that can clean and/or disinfect the interior walls of the pipe or track. In yet another embodiment, an alignment key extends radially from a body axis for guiding the cleaning bullet in an air conveyor track.

Abstract: A cleaning pig for a pipeline for long-distance transportation of a fluid material is advanced in the pipeline in a travel direction by the fluid material transported in the pipeline. The cleaning pig has a pig body and two collars connected to the pig body and spaced apart from one another. The pig body and the collars fill a pipe cross-section of the pipeline. An intermediate space is delimited between the two collars. A pressure opening is arranged at a trail end of the pig body in the travel direction. A pressure conduit connects the pressure opening to the intermediate space. A suction device is arranged in the intermediate space. A suction outlet is connected by a suction conduit to the suction device. The pressure conduit is connected to at least one jet opening directed with a jet action against an inner wall of the pipeline.

Abstract: A cleaning bullet for use in a pipe or track includes a compressible body. In one embodiment, a sheet draped over the body is engageable with interior walls of the pipe or track to clean small contaminants. In another embodiment, the body is formed from an absorbent material that absorbs a fluid, such as a cleaning solution, that can clean and/or disinfect the interior walls of the pipe or track. In yet another embodiment, an alignment key extends radially from a body axis for guiding the cleaning bullet in an air conveyor track.

Abstract: A liquid transport system has a number of access points, referred to generally as nodes, connected to an endless loop of piping such that liquid flowing in the system, to move the liquid from one node to another, flows in two generally discrete paths from a source node to a destination node. In general, any node can be associated with either a liquid source or a liquid destination. A source in a first liquid transfer can act as a destination in a subsequent liquid transfer, and vice versa. A single pigging system can be used to clean substantially the entirety of the liquid transport system among all sources and all destinations, except for leads from the nodes to the sources and/or destinations. The liquid transport system can be cleaned in place, thus to clean all of the piping which runs between the respective nodes in the liquid transport system.

Abstract: Apparatus for cleaning the interior surfaces of large diameter pipe provides a lightweight basic structure that is easily adapted to clean a range of diameters of pipe. The apparatus uses an interlocked drive mechanism to develop axial movement of the device and synchronize the rotary movement of the cleaning nozzles. The rate of movement is adjustable, to accommodate pipe of varying diameters. That way, the cleaning spray covers a swath of pipe surface, with a minimum overlap between passes, with no gaps in the cleaning.

Abstract: A pig for movement within a pipeline comprising a cylindrical housing with annular seals circumferentially mounted to the housing and extending outwards for sealing engagement between the pipeline and the housing. An internal flow cavity passes through the housing, with a gate positioned within the internal flow cavity, initially obstructing flow through the cavity. A locking device, connected to the gate, prevents the gate opening. A sensing device is capable of receiving a signal and is connected to an unlocking device. The sensing device receives a signal activating the unlocking device, thereby removing the locking device, permitting the gate to open and flow to pass through the cavity.

Abstract: Improvements are provided to an apparatus for cleaning a tubular. One set of improvements is provided by a nose shaft extending from the motor, a cone positioned on the shaft, and a brush positioned on the shaft between the nose cone and the vibratory motor. Another set of improvements is provided by a new passage and port arrangement on the piston and sleeve for the vibratory motor. Another improvement is provided by a set of passages and ports to provide oil flow to the area being cleaned. Another improvement is provided by capturing exhaust gas from the motor and exhaust of same at a location away from the operator of the unit.

Abstract: The present invention relates to coating of tubes, and more particularly to a system and method for coating and/or renovating deteriorated or pitted tubes to extend tube life and enhance performance. Using this system and method a thin coating is applied to the interior of a tube such that the coating is uniform in thickness and covers all regions of the tube. The coating material may be selected to minimize changes in heat transfer or may be selected to provide for the change in working fluid within the tube such that the working fluid does not negatively interact with the tube material.

Abstract: A device for travelling along a pipeline having fluid flowing along it comprises means for extracting power from said fluid flow and using that power to move the device along the pipeline against the fluid flow. The device is arranged in a series of coupled modules.

Abstract: One embodiment of the present invention relates to a trocar cleaning system including an elongated member and an irrigation device, a suction device, or a suction/irrigation device. The elongated member is designed to be inserted within a trocar. The elongated member includes a pliable wiper type member at the distal end to facilitate a radial plowing of debris within the trocar as the elongated member is inserted and removed. The elongated member also includes an internal channel coupled to a radial opening on the distal end and coupled to either an irrigation device or a suction device on the proximal end. The irrigation device may pressurize liquid through the internal channel and out a radial opening on the distal end of the elongated member so as wash the inside of the trocar. Likewise, the suction device may utilize the internal channel to create a suction force at the distal end of the elongated member.

Abstract: The method of retrieving a pig which is stuck in a pipeline including the steps of piercing the pig, establishing a circulation from the near end to the far end of the pig, gripping the central portion of the pig, and pulling the pig back to the proximate end of the pipeline.

Abstract: A cleaning apparatus useful for cleaning the interior of a pipeline contains: (A) a platform of a dimension sufficient to be inserted through an opening in the pipeline, the platform containing one or more portions; (B) a fluid interrupter having one or more parts to provide a surface to contact fluid flow and thereby interrupt fluid flow, the fluid interrupter constructed and arranged to be attached to the platform; a downstream side of the fluid interrupter being supported by members connected to the platform to dispose the fluid interrupter against fluid flow; (C) runners attached to the underside of the platform to contact an inner diameter of the pipeline; whereby the supported fluid interrupter, platform and runners redirect fluid flow between an underside of the platform and an inner surface of the pipeline; and (D) a device located downstream of the fluid interrupter to constrict the volume of the redirected fluid and increase its flow rate; whereby fluid flow is increased to move solid waste in the p

Abstract: A pipeline pig includes a venturi and a modulating valve located rearward of the inlet side of the venturi. When the valve is in the open position, a predetermined maximum bypass flow is allowed through the venturi. The closed position allows a predetermined minimum bypass flow. The valve may be a poppet-style valve or a frusto-conical shaped stopper. The stopper has sufficient mass and/or aerodynamic drag to overcome the spring force holding the valve in the open position. When the pig stalls, the valve closes and the stopper chokes bypass flow through the venturi. When the pig starts running again, the valve opens as inertia forces the stopper away from the inlet side of the venturi. Also, as friction of the pig increases due to changes in the internal diameter of the pipeline or accumulation of debris ahead of the pig, increased airflow across the valve creates drag sufficient to partially overcome the spring force, thus keeping the pig moving at a desirable rate of travel.

Abstract: A multi-diameter elastic sealing module for pigs, which operates in pipes having diameter changes, by being sent through the inside of a flexible or rigid pipe to move or draw various fittings and remove internal incrustations from the pipe, impelled by a fluid which flows inside said pipe. The sealing module comprises a sealing/impelling element (1), a flexible core (2) covered by the sealing/impelling element (1), a first clamping element (3), a second clamping element (4), a first fastening element (5) and a second fastening element (6).

Abstract: A device for a pig (1) for displacement by means of pressure differential in a pipe (8) where the pig (1) in addition to a pig body (2) comprises the necessary guides (4) and seals (6) against the pipe wall, and where the pig (1) is provided with a fluid motor (10), the fluid motor (10) being powered by fluid flowing through the fluid motor (10) due to the pressure differential across the pig (1).

Abstract: A method of cleaning a pipe provides a tool within the pipe. The tool has a body of smaller diameter than the pipe such that the body and pipe define an annulus and a fluid guiding member located at the annulus and movable relative to the pipe. The fluid guiding member moves relative to the pipe to guide fluid forward of the fluid guiding member to a pipe outlet.

Abstract: One embodiment of a jetted fluid system cleaning device may comprise an inlet port, an outlet port, at least one tube, and a sanitation system. The inlet port is adapted to receive a fluid and may be adapted to couple to a jetted bathtub faucet. The at least one tube may be coupled to the inlet port and adapted to transport the fluid from the inlet port to the fluid outlet port whereupon the fluid outlet port may be adapted to release the mixture to a jetted system intake port. The sanitation system in one embodiment may be operatively coupled to the at least one tube and adapted to insert a cleaning solution to the fluid to create a solution-fluid mixture.

Abstract: A device can travel along a pipeline which has fluid flowing along the pipeline. The device is able to extract power from the fluid flow in the pipeline and to use that power to move the device along the pipeline against the fluid flow. The device is arranged in a series of coupled modules.

Abstract: A pig towing device is adapted for movement through a conduit having bends and open T intersections. The pig has a front leading cup and a rear trailing cup adapted to seal with the conduit for propelling the device through the conduit. The leading and trailing cups are spaced apart a predetermined distance to maintain the seal with the conduit as the pig towing device negotiates past the open T intersections. The pig towing device has a flexible body interconnecting the front leading cup and the rear trailing cup. The flexible body is urged normally into a straight position extending along a central axis thereof to maintain the front leading cup and the rear trailing cup spaced apart by the predetermined distance. The flexible body has predetermined limited flexibility permitting it to bend relative to the central axis as the pig towing device negotiates through the bends in the conduit.

Abstract: Described herein are systems and methods for reducing cumulative deposition and unwanted secondary thermal reactions in pyrolysis and other thermal conversion processes. In an embodiment, a system comprises a device, referred to as a reamer, for removing product deposits between thermal conversion and condensation operations of a pyrolysis process. The reamer may comprise, but is not limited to, a mechanical reciprocating rod or ram, a mechanical auger, a drill bit, a high-temperature wiper, brush, or punch to remove deposits and prevent secondary reactions. Alternatively or in addition, the reamer may use a high-velocity curtain or jet (i.e., a hydraulic or pneumatic stream) of vapor, product gas, recycle gas, other gas jet or non-condensing liquid to remove deposits. Preferably, the reamer removes deposits during the pyrolysis process allowing for continuous operation of the pyrolysis process.

Abstract: A pumping unit is provided that controls fluid pressure in a pipe being traversed according to the degree of resistance encountered by a pig traversing the pipe under fluid pressure. Increasing fluid pressure in constricted areas enables an intelligent pig to traverse the pipe with a more uniform speed by controlling the fluid velocity.

Abstract: A pig for conveying a working medium inside a feed line comprises a pig body which can be driven inside the feed line by a pushing medium and which has on one front side a projection with a free front surface. The pig also contains at least one first and one second circumferential sealing element arranged on the pig body which are made of elastomeric material and which are at a distance from each other in the direction of the longitudinal axis of the pig body and which run coaxial to the longitudinal axis of the pig body. The sealing elements can be pressed against the inner wall of the feed line, in that the working medium or the pushing medium bears against a contact surface of the respective sealing element. The contact surface of the sealing element neighboring the front side with the projection is smaller than the contact surface of the other sealing element.

Abstract: A scraper pig for cleaning tubes and pipelines comprising a flexible core provided with a casing in which scraper studs are embedded in a manner whereby they protrude sufficiently to perform a cleaning action when they are propelled through the tube. A method for the manufacture of the pig and the design of the stud is also provided.

Abstract: A method of coupling pipeline pigs to form an articulated pipeline pig assembly. A first step involves providing more than one pipeline pig, the more than one pipeline pig having couplers which couple upon impact and allow for limited articulation upon coupling. A second step involves launching each pipeline pig individually into a carrier pipe. A third step involves bringing the more than one pipeline pig into contact within the carrier pipe after launching to cause the couplers on each pipeline pig to couple with another pipeline pig upon impact, thereby forming an articulated pipeline pig assembly of more than one pipeline pig.

Abstract: A pipeline pig and pig launching apparatus which allow the automatic launching of multiple pigs into a pipeline are claimed. The pipeline pig (30,32,34) comprises an elongate body (40) having first and second ends (46,44) and a fluid passage (42) defined therein. The fluid passage (42) has an inlet (47) at the first end (46) of the body (40) and an outlet (49) at the second end (44) of the body (40). At least two support members (48,50) project radially outwardly from the body (40) and are spaced longitudinally from one another along the body (40). A valve means (52) is located within the passage (42) and adapted to selectively move between a first position in which fluid is free to flow through the outlet (49) and a second position in which fluid cannot flow through the outlet (49). A projecting member (54) extends longitudinally from the first end (46) of the body (40).

Abstract: A tube scraper for removing deposits from the interior surface of heat exchange tubes, the scraper being fitted with a set of diverging scraper blade arms mounted on an arbor in nested relationship such that scraper blades have overlapping scraping edges.

Abstract: Tracheo-oesophageal valve cleaning apparatus comprises a fluid dispenser with a fluid reservoir and an outlet; a cleaning element mounted proximal to the outlet; and a drive mechanism including an element mounted axially within the said fluid dispenser, wherein axial movement of the element of the drive mechanism towards to the outlet causes both rotation of cleaning element and fluid to be dispensed from the outlet.

Abstract: A cleaning device, or projectile, cleans the inside surface of a tube as it is propelled by a liquid through the tube by mechanically scraping and cleaning soft and hard deposits, such as sludge and manganese, from the inner surface of the tube, such as those found in condensers and heat exchangers. The tube cleaning device, or projectile, is propelled forward by a high-pressure fluid spray injected into a tube. This high-pressured fluid injection is sufficient to advance the device through the tube, allowing the device to scrape or otherwise dislodge incrustations or other accumulations from the interior wall of the tube. The tool cleans the inside surface of a tube as the tool travels through the tube and includes a compressible bushing and a series of cutters secured to a split support that defines a cavity for receiving the bushing, the support being adapted to be opened and closed to receive and contain the bushing.

Abstract: A scraping element for a pipeline pig, includes a moulded body having a circular peripheral scraping edge circumscribing the body and adapted to engage an interior surface of a pipeline. The body is adapted to be mounted to a pipeline pig. A wear resistance material embedded in the scraping edge of the body.

Abstract: A thruster pig for sending through a pipe from an entrance facility to a receiving location, for servicing or monitoring, by pumping a thrusting fluid into the pipe to force the pig forward is disclosed. The thruster pig includes a body having a front end and a back end, where the back end includes a reaction surface to which said the thrusting fluid applies a motive force. The body is slightly smaller in diameter than the inner diameter of the pipe. The pig also includes a seal circumferentially arranged on the pig to seal between said body and said pipe. A desired differential pressure is maintained over the pig to urge said pig forward through the pipe by pumping a fluid into the annulus between the pipe and the return flow line while returning fluid through said return flow line utilizing connected servicing or monitoring equipment. A connector releasably connects a return flow line to the pig.

Abstract: A method for transporting a swab through a pipeline, or through an insert within a pipeline, according to he present invention may include coupling a swab launcher to the pipeline, the swab launcher having a launch chamber with a first inner large enough to receive a swab when the swab is substantially uncompressed and a narrowing portion configured to compress the swab to fit within the pipeline, inserting the swab into the launch chamber, pressurizing the launch chamber with a compressed fluid behind the swab, and advancing the swab with the compressed fluid through the narrowing portion and into the pipeline.