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| Number | Title | Issue Date |
| 8151483 | Progressive dewatering and inhibitor dispersal rolling pig A method for progressively dewatering a pipe or pipeline includes the use of a loose-fitting spherical- or quasi-spherical shaped pig body which rolls forward through the interior space of the pipe and temporarily captures and redistributes a portion of the volume o... | 04/10/2012 |
| 8052801 | Pipeline pig launch pin and retraction system 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 ... | 11/08/2011 |
| 8001988 | Verifiable closing and locking system of a cylindrical passageway A method according to this invention employs a set of valves, a series of pressure checks, and a physical stop for verifying the closing of a locking system of a cylindrical passageway. The method may also employ an equalization piping. The valves isolate a tapping ... | 08/23/2011 |
| 7926516 | Internal composite repair apparatus A repair device and method for its use includes plugs that pressure isolate an internally damaged pipeline section and an hermetically sealed housing that contains a length of composite material and a means for controllably releasing the composite material. In a pre... | 04/19/2011 |
| 7900655 | Composite load transferring technique A method for repairing and reinforcing a pipeline includes covering a defect in a pipeline section with a composite wrap, isolating the wrap from the ambient environment, and applying a compressive force on the wrap so that the pressure on the wrap is substantially ... | 03/08/2011 |
| 7841364 | Double block and bleed plug A pipe plug comprised of two, pivotally connected plugging heads, each plugging head having a sealing element, which work in combination to double block and bleed a pipe. The first sealing element prevents flow of product in the pipe and the second sealing element c... | 11/30/2010 |
| 7827646 | Vortex inhibitor dispersal pig 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 locate... | 11/09/2010 |
| 7699564 | Self-contained keyhold weld fitting and method of use A method of attaching a branch outlet fitting to a metal pipe buried beneath the earth's surface while causing reduced disturbance to the earth above the pipe, comprising digging a vertical excavation from the earth's surface to expose a short length of the pipe; po... | 04/20/2010 |
| 7673655 | Composite wrap repair of internal defects A system and method for repairing and reinforcing a pipeline includes a pair of opposing composite wrap bands that are located on the external surface of the pipeline and positioned a predetermined horizontal distance from a defect area. A composite wrap is then app... | 03/09/2010 |
| 7546847 | Locking plug for closing the sidewall of a pipe A plug for closing an opening in the sidewall of a pipe, including a base member having a radial flange portion, a tubular portion and an annular elastomeric seal member slideably received on the base member tubular portion and in engagement with the flange portion.... | 06/16/2009 |
| 7475591 | Methods and systems for hydrostatic testing a pipeline A method of hydrostatic testing a selected section of a pipeline having fluid flow therethrough, including the steps of introducing into the pipeline a pig train including a leading seal pig, a supply liquid slug, a first isolation tool, a test liquid slug and a sec... | 01/13/2009 |
| 7398910 | System for use in tapping a pipe A mechanical weldable fitting for use in tapping a pipe includes a first and second metal collar, each formed of attachable upper and lower semi-toroidal portions that when assembled on the pipe providing spaced-apart external cylindrical surfaces. Each collar havin... | 07/15/2008 |
| 7353839 | High temperature completion plug For use in closing a cylindrical passageway through a working member in which the passageway is defined in part by a reduced diameter internal circumferential sealing surface and an internal locking groove, a completion plug having a plug body with a cylindrical ext... | 04/08/2008 |
| 7352463 | Method and device for detecting gases by absorption spectroscopy A method and device for measuring a concentration of a preselected gas in a gas sample are disclosed. The device comprises a Herriott type multipass cell (10) having a center axle (74) and a housing (80A, 80B) surrounding and spaced from ... | 04/01/2008 |
| 7316176 | Remote monitor system for a longitudinally positionable control bar A remote monitor system for a longitudinally positionable control bar having position indicating indicia thereon including a housing receiving the control bar therein and having an aperture in a sidewall communicating between the control bar and an exterior housing ... | 01/08/2008 |
| 7311114 | Cross-line plugging system A method of providing access to the interior of a cross-line that intersects with a primary pipeline of equal or greater diameter, including the steps of attaching a branch fitting to the exterior of the primary pipeline on the side thereof opposite the point of int... | 12/25/2007 |
| 7270139 | Cam-assisted, wedge actuated, metal-to-metal seal, block and bleed plugging tool A system and method of plugging a pipe including sealably securing onto the exterior of a pipe first and second spaced apart collars, each collar having a sealing face in a plane perpendicular the pipe axis, cutting and removing a length of pipe from between the col... | 09/18/2007 |
| 7216795 | Mechanical weldable fitting for use in tapping a pipeline A mechanical weldable fitting for use in tapping a pipe includes a first and second metal collar, each formed of attachable upper and lower semi-toroidal portions that when assembled on the pipe providing spaced-apart external cylindrical surfaces. Each collar havin... | 05/15/2007 |
| 6874193 | Inhibitor dispensing pipeline pig A pipeline pig that is moved by pressurized gas flow and that provides for distribution of treating liquid subsisting in the lower portion of the pipeline, having a pig body with a nose cone at a foward end thereof, centralizers affixed to the pig body by which it i... | 04/05/2005 |
| 6847207 | ID-OD discrimination sensor concept for a magnetic flux leakage inspection tool An instrument pig and method of operation thereof for determining the characteristics of a ferromagnetic pipeline through which it passes, including a pig body, first and second coaxial circumferential, spaced apart magnets of opposed polarities supported to the pig... | 01/25/2005 |
| 6755916 | Method of dispensing inhibitor in a gas pipeline A method of distributing liquid present in the lower portion of a gas pipeline to the interior upper surface of the pipeline including the steps of passing a pig having a venturi therein, through the pipeline, the venturi being actuated by gas pressure taken from wi... | 06/29/2004 |
| 6286553 | Removable closure system A closure for an opening extending through a tubular member, the opening having a first cylindrical surface of a first internal diameter and a second cylindrical surface of an enlarged internal diameter providing a circumferential ledge, and, in the secon... | 09/11/2001 |
| 6116285 | Removable threaded plug A removable plug for an internally threaded opening has particular application in a system for closing an opening in the sidewall of a pipe. The system includes a nipple having an inner end attached, such as by welding, to a pipe, and an outer end having ... | 09/12/2000 |
| 6067682 | Cup or disc for use as a part of a pipeline pig An improved cup for use as a part of a pipeline pig is in the form of an elastomeric cup member having an outer circumferential pipe engaging portion defined by a plurality of at least three closely spaced apart integral circumferential lip portions, the ... | 05/30/2000 |
| 6012878 | Pressure balanced subsea tapping machine A machine for use underwater and therefor subject to ambient hydrostatic pressure for tapping a pressurized pipeline has an elongated tubular tapping machine body with a boring bar therein that receives a cutter at its lower end. A passageway in a lower e... | 01/11/2000 |
| 5975142 | Removable closure system A closure for a tubular member having a first surface of a first internal diameter and a second surface of an enlarged internal diameter providing a circumferential ledge, and, in the second surface an increased internal diameter circumferential slot, the... | 11/02/1999 |
| 5919335 | Facer and hand held tool for joining small diameter plastic pipe A hand held tool for facing and joining the ends of opposed lengths of plastic pipe in axial alignment has a generally horizontal body and a generally vertical fixed handle extending from the body. A cylindrical shaft is supported by the body perpendicula... | 07/06/1999 |
| 5843271 | Plastic pipe butt fusion machine and cart assembly An assembly is provided for butt fusing lengths of plastic pipe in axial relationship. The assembly includes a cart having a chassis and wheels, the chassis having a longitudinal axis defined by the direction of movement of the cart in a straight line. A ... | 12/01/1998 |
| 5788790 | Method for butt welding thermoplastic pipe including automatic drag compensation A method for butt welding first and second thermoplastic pipes to each other including the steps of locating the end portions of first and second pipes to be joined in clamps that are moveable towards and away from each other by the application of hydraul... | 08/04/1998 |
| 5770006 | Butt fusion machine for manufacturing full size segemented pipe turns A machine for use in butt fusing in axial alignment plastic pipe having a selected maximum diameter is adaptable by the use of specially designed inserts secured in the lower portions of fixed and moveable clamps, the inserts serving to elevationally rais... | 06/23/1998 |
| 5725724 | Plastic pipe facer for butt fusion application A facer for use with a plastic pipe butt fusion machine, the machine being of the type that supports two lengths of plastic pipe in spaced apart, end-to-end relationship. The facer has a housing supportable to a butt fusion machine that includes a driven ... | 03/10/1998 |
| 5699577 | Magnetic cleaning pig A cleaning device for passing through a pipeline for removal of ferro-magnetic debris includes an elongated body having at least two spaced apart elastomeric cups that fit within a pipeline to be cleaned, the cups supporting the body so that its elongatio... | 12/23/1997 |
| 5612499 | Method of inserting a sensor into a pipeline A method of inserting a sensor into a pipeline including the steps of securing a fitting onto the pipeline, tapping an opening in the pipeline through the fitting, installing a housing on the fitting, the housing having a nipple extending at an angle to t... | 03/18/1997 |
| 5577776 | Tee fitting for lined pipe A branch connector is provided for coupling a main pipe having a liner disposed therein with a service line and for simultaneously sealing the interface between the edges of the main pipe and the liner. The connector includes an outer hollow housing adapt... | 11/26/1996 |
| 5520871 | Method of manufacturing a spherical pigging device A method of manufacturing a spherical pigging device for passing through a pipeline by forming a water soluble spherical core, affixing numerous magnets to the surface of the core, suspending the core within a spherical mold, pouring a liquid between the ... | 05/28/1996 |
| 5506505 | Apparatus for remotely indicating pipeline pig including a sensor housing having surface engaging orthogonally disposed paramagnetic materials a solid state sensor and a flag An apparatus for non-intrusively indicating the passage of a pipeline pig having a housing adapted to be supported adjacent the exterior surface of a pipeline through which a magnet carrying pig moves, the housing containing an armature formed of pole pie... | 04/09/1996 |
| 5505811 | Sidewall applicator for heat fusion of a fitting to a plastic pipe A sidewall applicator for heat fusion of a fitting to a plastic pipe has first and second spaced apart paralleled main shafts each having a lower end that is supported by rounding shells to the exterior of the plastic pipe so that the main shafts are supp... | 04/09/1996 |
| 5466099 | Cutter shell for forming holes of improved cylindricality A cutter shell for cutting a circular opening in a metal object formed of a tubular boring portion and a head portion. The boring portion has a tubular sidewall and teeth at the forward circumferential end. The sidewall is of thickness not greater than th... | 11/14/1995 |
| 5464496 | Plastic pipe butt fusion machine A plastic pipe butt fusion machine has a base, a clamp on the base for securing a first length of plastic pipe, a second clamp mounted on the base for securing a second length of plastic pipe to be fusion welded to the first in axial end-to-end alignment,... | 11/07/1995 |
| 5461746 | Magnetic cleaning pig A magnetic disc for a cleaning device which is passed through a pipeline having a cylindrical internal wall. The magnetic disc includes a flexible circular disc body perpendicular to the cylindrical wall, the disc body having a plurality of radially space... | 10/31/1995 |
