Abstract: Methods and apparatus for reducing the impact of guided (or “tube”) waves in permanently installed seismic systems are provided. By utilizing passive acoustic absorbers, the impact of tube waves may be reduced, leading to improved performance of permanently installed seismic systems that are installed onto production tubing when the well is completed.

Abstract: A system for cleaning pipes and pipe joints where the interior surface of the pipe becomes coated with material being processed comprising a cylindrical cleaning body having opposing first and second ends, said cylindrical body having an annular shape with interior and exterior walls so that the outer wall contacts the interior surface of a pipe and wherein ends of the cleaning body have means for removing material deposited on the interior surface, a means for moving the apparatus along the length of said pipe, a first and second means for cleaning said cleaning body having passages that allow fluid to pass through, wherein said first and second cleaning means mates with said first and second ends of said cleaning body, where said cleaning body is moved into contact with said cleaning means to dislodge accumulated deposits from the cleaning body and simultaneously dislodging accumulated deposits from said cleaning means.

Abstract: Fluid is circulated through a heat exchange system for heat exchange to occur at a bundle of tubes making up a portion of the heat exchange system. Heat exchange efficiency at the bundle of tubes requires debris and fouling deposits accumulated therewithin to be substantially removed. Taking the heat exchange system off-line for physical flushing is not only ineffective but also disallow use of the heat exchange system for the duration it remains off-line. Described herein is an embodiment of a cleaning system which uses a displacement system for displacing cleaning balls carried in fluid into the bundle of tubes for cleaning thereof. A flow diverting system is configured and operable for introducing the cleaning balls to the bundle of tubes when in a first operating mode and for retrieving the cleaning balls from the plurality of tubes when in a second operating mode.

Abstract: A pipe inspection system comprises an inspection head at the end of a flexible shaft, wherein the inspection head comprises a rigid distal end portion and a rigid intermediate portion spaced from the distal end portion by a flexible region. The flexible region comprises a series of sections with pivotal connections between adjacent sections which allow pivoting about two orthogonal axes, wherein the range of pivoting between adjacent sections is limited such that the complete series can be pivoted by a maximum angle of between 80 and 100 degrees.

Abstract: A pipe pig for refinery heater tubes is disclosed. The pipe pig has arcuate cleaning elements which form an expandable circumference. Each of the arcuate cleaning elements has a scraping edge. A spring element biases the arcuate cleaning elements radially outward. The pipe pig may have structural components made from titanium alloys and arcuate cleaning elements made from carbon-carbon composites. A method for cleaning coking out of refinery heater tubes using the pipe pig is also disclosed.

Abstract: This is a photoconductor and dispenser assembly and system. The photoconductor is in a tubular form so as to accept a tubular formed dispenser within its hollow portion. The dispenser will coat within this hollow portion a uniform coating of an acoustical dampening material. This material will dull any sound produced by the photoconductive marking system. The assembly is the tube having in its hollow portion this dispenser. The dispenser fits tightly but movably within the hollow portion.

Abstract: A flow line cleanout device for a coiled tubing head of a coiled tubing string is comprised of a hydraulic vane motor assembly having a rotor configured for attachment to and rotation of a work tool such as a fluid ejecting nozzle to be inserted into a flow line. Seals around the device seal the flow line so that fluid pressure behind the coiled tubing head force fluid through the hydraulic vane motor assembly to rotate the rotor and the attached nozzle in response to pressure changes created by check valves. Jets of fluid from the rotating nozzle serve to wash and remove blockages in the flow line and facilitate the insertion and advancement of the coiled tubing string.

Abstract: An intelligent pig for pipeline monitoring comprises a single body containing signal transmitters and receivers provided with replaceable rings for centering the body within the pipeline, the rings may be provided with brushes which help center the pig within the pipeline and also aid its passage through pipelines which may contain bends and/or be of variable diameter, the pig may be used in combination with a cleaning pig to provide combined activities using a common driving force.

Abstract: Tapping device for beverage, including at least one beverage container, a tapping line and a tapping cock, wherein the tapping line extends at least to adjacent the tapping cock and a connector for connection of the tapping line to the at least one beverage container, wherein a cleaning element is provided in the beverage container or the connector, which cleaning element upon broaching of a beverage container is situated near an end of the tapping line proximal to the beverage container and is movable through the tapping line under pressure of beverage from the beverage container, while abutting against an inner side of the tapping line, such that beverage will propel the cleaning element in the tapping line, at least to near the tapping cock.

Abstract: The remote controlled chemical pigging apparatus includes a housing and an inflatable device. The inflatable device contains chemicals to dissolve hardened or fossilized materials or contaminants contained within the interior portion of a pipeline, such as an oil or gas pipeline. At a specific location in the pipeline, such as at a pig apparatus receiver portion of the pipeline, the inflatable device is inflated and exploded to disperse the pipeline chemicals contained therein onto the hardened materials or contaminants that have fossilized within the pipeline. The hardened, fossilized materials or contaminants are then dissolved to liquefy the contaminants and, subsequently, to discharge the liquefied contaminants through a drain located in the pipeline. A method of cleaning a pipeline with a remote controlled chemical pigging apparatus having an inflatable device is also provided.

Abstract: A system and method for sanitizing pneumatic conveying piping is provided. The system includes a motorized hose reel with a pig attached to the end of the hose. The pig is smaller in diameter than the inner diameter of the pipe through which it is conveyed. The decreased size of the pig keeps the conveying speed of the pig through the pipes down, while at the same time providing sufficient force to pull the supply hose attached to the pig through the pipes with the pig. The pig of some embodiments of the inventive concept is shaped as a hollow cone or frustoconical shape. Such a shape reduces weight of the pig and also allows the hose to be inserted through the body of the pig with a spray nozzle at the end. The hollow cone shape deflects relatively easily to allow the pig to go around corners or other obstructions. Also, such a pig design automatically centers the nozzle within the pipe during spraying.

Abstract: Pigs (10) are propelled forwards by a propulsion fluid in a pipeline (21). The pigs (10) have an upstream end (13), a downstream end (11), and an intermediate section (12). The intermediate section has a variable geometry chamber (16) associated therewith and one or more outwardly extending external pawl teeth (15). The pawl teeth are automatically displaceable outwardly relative to a longitudinal axis (9) in response to a pressure differential between a downstream pressure and an upstream pressure. The pig is configured such that a change in a geometry of the chamber in response to the pressure differential between the downstream pressure and the upstream pressure causes the one or more pawl teeth to automatically displace outwardly when the upstream pressure is less than the downstream pressure. When the pawl teeth are deployed, upstream displacement of the pig is inhibited. Various related systems (5) and methods are also disclosed.

Abstract: Disclosed is a pig assembly for maintaining a functional line for conveying fluid. In one aspect, the pig assembly includes a larger diameter pig having an internal compartment and at least one smaller diameter pig adapted to fit therein. The larger diameter pig is capable of passing through a larger diameter functional line and the smaller diameter pig is capable of passing through a smaller diameter functional line. In another aspect, a method for maintaining a functional line for conveying fluid is provided which includes pigging a subsea line having at least a larger diameter functional line and a smaller diameter functional line in fluid communication with one another using a pig assembly as described herein.

Abstract: The chemical pigging apparatus for pipelines includes a forward component and a rearward component. The forward component has front and rear seals, with a chemical chamber between. A flexible elongate dispensing tube is in communication with the front of the chamber, with the tube having a perforated dispensing tip at its forward end. The chamber is open to the rear, with a piston sealing the rear portion of the chamber. The rearward component has a rearward component seal, with a rod extending forward of the seal. The rod has a protrusion that seats within a mating socket at the rear of the piston. The apparatus is propelled through a pipeline by pressure behind the rearward component seal, with the rearward component pushing the forward component through the pipeline and pushing the piston into the chemical chamber to expel chemicals through the forward dispensing tube and its dispensing tip.

Abstract: A brush useful in pipeline pigs, for example, in magnetic flux leakage tools or cleaning tools, a method of making the brush and pipeline pig comprising the brush. The brush has a metal bristle holder and a plurality of bristles, the ends of which are held in the bristle holder by glue, swaging or a combination of glue and swaging. The glue may be an anaerobic glue. The brush and method of making avoid the use of heat to secure the bristles to the bristle holder, avoid the use of solder or weld metal, and are less labor intensive than soldering or welding.

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: A pig traversable through a conduit to deliver a liquid, such as a coating material, having a resilient flexible, generally frustoconical sealing lip which is resiliently biased against an internal surface of the conduit and a resilient biasing member engaging and biased against an under surface of the sealing lip, biasing the sealing lip against an internal surface of the conduit. The disclosed embodiments of the resilient biasing member include annular coil springs and serpentine annular metal springs which may be U-shaped in cross-section, including a first leg received against the under surface of the sealing lip and a second leg received against the pig body portion.

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: 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 front end water box with an on-line rubber ball cleaning function in a tubular condenser of a water cooled chiller is provided. A front end water box and an automatic on-line rubber ball cleaning device are integrated. Besides the structure of a normal front end water box, a ball receiving device, a rubber ball collection cavity, a ball sending device, a division drainage device, a ball sending division separator, a ball observer, an automatic rubber ball receiving-and-sending control valve, an automatic terminal temperature difference (TTD) monitoring and recording device, and an automatic rubber ball cleaning controller are further included. Therefore, division cleaning, on-line observation, and rubber ball replacement are automatically realized, the operation TTD of the chiller is automatically displayed and recorded, and a function of manually adjusting the cleaning frequency, period, and start and stop is achieved, so as to ensure that the TTD increase of the chiller does not exceed 0.3° C.

Abstract: An intelligent pig for pipeline monitoring comprises a singles body containing signal transmitters and receivers provided with replaceable rings for centering the body within the pipeline, the rings may be provided with brushes which help centre the pig within the pipeline and also aid its passage through pipelines which may contain bends and/or be of variable diameter, the pig may be used in combination with a cleaning pig to provide combined activities using a common driving force.

Abstract: A system and method for retrieving a pipeline tool from a pipeline includes a speed control drive section that includes a primary bypass flow valve and a failsafe valve located in a central bypass flow passageway of the drive section. The failsafe valve is placed under the control of a controller. The controller is programmed to release the failsafe valve under prescribed failure conditions. An actuating means moves the failsafe valve between a normally opened positioned and a closed position in response to the controller.

Abstract: A device for cleaning the interior of tubes. The abstract of the disclosure is submitted herewith as required by 37 C.F.R. §1.72(b). As stated in 37 C.F.R. §1.72(b): A brief abstract of the technical disclosure in the specification must commence on a separate sheet, preferably following the claims, under the heading “Abstract of the Disclosure.” The purpose of the abstract is to enable the Patent and Trademark Office and the public generally to determine quickly from a cursory inspection the nature and gist of the technical disclosure. The abstract shall not be used for interpreting the scope of the claims. Therefore, any statements made relating to the abstract are not intended to limit the claims in any manner and should not be interpreted as limiting the claims in any manner.

Abstract: A device for travelling along a pipeline having fluid flowing along it comprises a turbine for extracting power from the 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: 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 reinforced cup for use on downhole devices is disclosed. The reinforced cup is comprised of a cylindrical metal sleeve. Surrounding the outer circumferential surface of the metal sleeve is a flexible mesh cage comprised of a plurality of woven wire strands. A resilient cover is formed around the metal sleeve and flexible mesh cage so that the metal sleeve and flexible mesh fabric are encased by the resilient cover. The flexible mesh cage serves to reinforce the resilient cover.

Abstract: A pipeline pig brush and method of assembly of the pipeline pig brush is provided. The pipeline pig brush has a body with a plurality of recesses provided in an outer surface. A number of brushes, each brush having a ferrule and a tuft of bristles, can be mounted to the body, wherein the ferrule of each brush is inserted into the recess and a removable fastener is installed to engage the body and overlap the ferrule such that the ferrule cannot be removed from the recess without removing the fastener.

Abstract: One or more tubular cleaning devices and methods for cleaning a tubular are provided herein. The tubular cleaning device can include an inner tubular member having an inner tubular member inner bore formed therethrough. The inner tubular member can include a housing formed on a first portion thereof, a first connection end adjacent the housing, and a second connection end opposite the first connection end.

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

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 polymerization reactor comprising one or more circulation loops with one or more inlets for raw material, one or more outlets, and a circulation pump for circulating a reactor charge within the circulation loop. A by-pass line for by-passing the circulation pump connects a point of the loop upstream of the pump with a point downstream of the pump.

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: 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 modular pipeline pig is formed of one or more driving cups and one or more scrapers, all joined together by flexible polymeric spool pieces. The scrapers include notches or cut-outs along their peripheral edges to bypass fluid. The driving cups, scrapers, and flexible spool pieces are joined together by metal bolts, the only metallic part of the pig. A flow path is provided through and around the pig to flush paraffin away from the pig when it is resident within a receiver so that the pig can be easily removed from the receiver without the laborious manual removal of the paraffin.

Abstract: The present invention provides a pipeline pig (10) comprising an elongate body (12) and annular front and rear supports (26,30) projecting radially from the body (12). Each support (26,30) has an upstream side and a downstream side, with the front support (26) including at least one first fluid passage (18) permitting fluid flow from the upstream side to the downstream side, and the rear support (30) including at least one second fluid passage (22) permitting fluid flow from the upstream side to the downstream side. The pig further comprises a launch valve (50) adapted to move from an open position to a closed position to close the at least one first fluid passage (18), and a control means adapted to control the closing of the launch valve (50). A launch trap for launching pigs into a pipeline is also provided.

Abstract: A method of cleaning a tubular with a cleaning tool that includes the steps of disposing the cleaning tool in the tubular, the cleaning tool having a main body with a first end, a second end, an inlet, an outlet, and a propulsion relief assembly disposed proximate to the second end. The method further includes the steps of sufficiently pressurizing fluid behind the tubular to propel the cleaning tool along the tubular, and increasing the pressure of the fluid to actuate the propulsion relief assembly, whereby fluid is jetted out the outlet and out of the propulsion relief assembly.

Abstract: Provided are a method and a device for performing work in pipelines, whereby it is possible to exert an extremely large driving force within a pipeline. Moreover, provided are a method and a device for performing work in pipelines, which are provided with a means for forcibly drying the wet inner surface of a pipeline. The device is provided with an annular pressure boundary seal with a free-end portion that comes into contact with the inner wall of the pipeline. The seal separates the space within the pipeline into two spaces, a space (A) and a space (B), using the seal as a boundary. The end of the space (A) adjacent to the seal is connected with a suction pump via a hose, while the other end of the space (A), which is not adjacent to the seal, is connected with the fluid surrounding the pipeline via a vacuum breaker that adjusts the negative pressure within the space (A).

Abstract: A pipeline debris shearing device includes a forwardly positioned, self sharpening, wear compensating, diameter conforming elastomeric member that forms a peeling edge having a negative rake angle to peel away debris from the internal wall of a pipeline. The peeling edge is formed at the point of meeting between a concave-shaped, curved forward face surface and a substantially straight outer peripheral surface. Radial slots may be provided to lessen the force being exerted on the peeling edge and provide for bypass flow to carry away debris removed by the peeling edge. Spaced-apart narrow stripper teeth may be added to help in removing harder deposits of debris. The peeling edge may be arranged substantially perpendicular the central longitudinal axis of the pipeline pig or arranged oblique to it. Further, the peeling edge may spiral about at least a portion of the pipeline pig.

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: A reinforced cup for use on downhole devices is disclosed. The reinforced cup is comprised of a cylindrical metal sleeve. Surrounding the outer circumferential surface of the metal sleeve is a flexible mesh cage comprised of a plurality of woven wire strands. A resilient cover is formed around the metal sleeve and flexible mesh cage so that the metal sleeve and flexible mesh fabric are encased by the resilient cover. The flexible mesh cage serves to reinforce the resilient cover.

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 tube cleaning implement with elongate shaft supporting a brush in a median section and similar scrapers or wipers fitted to opposite ends of the shaft to provide for a scrape-brush-scrape cleaning action of tube interiors, and to provide a reversible implement having extended useful life.

Abstract: A method and system for launching a pipeline pig includes the steps of compressing a modulating bypass valve of a pipeline pig and installing a locking means to temporally maintain the bypass valve in the compressed state. Once the pig has travelled a predetermined distance through the pipeline, the locking means is released and retrieved through the launch trap door. The locking means is preferably a launching pin having a clip attachment that receives the clips of a retractable lead. The lead is housed by a retraction device that is detachably secured to the launch trap door. The modulating valve has sufficient mass and aerodynamic drag to overcome the force of a gas spring. The valve moves between a retracted and compressed position substantially instantaneously upon the pipeline pig stalling and between the compressed and retracted position substantially instantaneously upon the pipeline pig accelerating.

Abstract: Embodiments of the present invention generally relate to a method of treating a tubular string using a pigtrain. In one embodiment, a method of treating a tubular string includes injecting working fluid between a lead pig and a trail pig of a pigtrain. A bypass pig of the pigtrain is in a first position between the lead pig and trail pig and closer to the lead pig. The method further includes injecting propellant behind the trail pig, thereby driving the pigtrain through the tubular string. The bypass pig gradually moves from the first position to a second position closer to the trail pig, thereby agitating the working fluid.

Abstract: A resilient inspection brush used in electrically inspecting pipelines for abnormalities is described which employs highly conductive metals, such as nickel. Since bristles [330] made from these metals cannot be secured firmly by soldering or epoxy, they are folded over a retaining member [350], or wrapped around the retaining member [350]. The retaining member [350] is secured inside of a base housing [320]. The top [321] portion of the base housing [320] may be crimped or swedged to reduce the size of the opening, thereby physically holding the bristles [330]. This also insures that the retaining member [350] does not pass through the opening, securing the retaining member [350] inside of the base housing [320]. In another embodiment, an inner sleeve [810] is used to further secure the bristles [330] and simplify assembly.

Abstract: A trailing pig cleaning device is adapted to be dragged by a pig towing device. The cleaning device collects a predetermined quantity of debris. The cleaning device has a continuous outer surface portion of variable diameter urged into normal contact with the internal wall of the pipeline. The continuous outer surface portion presents a continuous upstream or leading edge portion for scraping debris from the cylindrical internal wall in advance of the outer surface portion. The device has a debris collecting surface portion extending radially inward from the outer surface portion for collecting the predetermined quantity of debris scraped from the cylindrical internal wall. The device has at least one debris and pipeline media bypass opening passing through the debris collecting surface portion permitting excess scraped debris to pass therethrough back into the pipeline and permitting media to pass thereby to propel the pig towing device.

Abstract: A pipe pig for refinery heater tubes is disclosed. The pipe pig has arcuate cleaning elements which form an expandable circumference. Each of the arcuate cleaning elements has a scraping edge. A spring element biases the arcuate cleaning elements radially outward. The pipe pig may have structural components made from titanium alloys and arcuate cleaning elements made from carbon-carbon composites. A method for cleaning coking out of refinery heater tubes using the pipe pig is also disclosed.

Abstract: One or more tubular cleaning devices and methods for cleaning a tubular are provided herein. The tubular cleaning device can include an inner tubular member having an inner tubular member inner bore formed therethrough. The inner tubular member can include a stop formed on a first portion thereof, a first connection end adjacent the stop, and a second connection end opposite the first connection end.

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.