US20100175771A1 - Telescoping double block and bleed plug - Google Patents
Telescoping double block and bleed plug Download PDFInfo
- Publication number
- US20100175771A1 US20100175771A1 US12/351,479 US35147909A US2010175771A1 US 20100175771 A1 US20100175771 A1 US 20100175771A1 US 35147909 A US35147909 A US 35147909A US 2010175771 A1 US2010175771 A1 US 2010175771A1
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- United States
- Prior art keywords
- cylinder
- sealing
- sealing element
- plugging device
- pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/16—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with special arrangements for separating the sealing faces or for pressing them together
- F16K3/18—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with special arrangements for separating the sealing faces or for pressing them together by movement of the closure members
- F16K3/188—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with special arrangements for separating the sealing faces or for pressing them together by movement of the closure members by means of hydraulic forces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/10—Means for stopping flow from or in pipes or hoses
- F16L55/105—Closing devices introduced radially into the pipe or hose
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/10—Means for stopping flow from or in pipes or hoses
- F16L55/12—Means for stopping flow from or in pipes or hoses by introducing into the pipe a member expandable in situ
- F16L55/124—Means for stopping flow from or in pipes or hoses by introducing into the pipe a member expandable in situ introduced radially into the pipe or hose
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
- F16L55/1608—Devices for covering leaks in pipes or hoses, e.g. hose-menders by replacement of the damaged part of the pipe
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
Definitions
- This invention relates generally to pipe plugs, particularly plugs for use in pipelines that carry high or low pressure fluids, high or low temperature fluids, steam, dangerous fluids, and environmentally hazardous fluids.
- Double block and bleed is a well-known term of art that refers to setting two seals in a pipe and opening a bleed port between the seals to ensure that the first seal is holding. Any leakage past the first seal is contained by the second seal and forced to exit through the bleed port. This arrangement ensures that the pipe is completely sealed, making it safe to work on downstream of the two seals.
- Achieving double-block and bleed typically requires the use of a single, metal-to-metal plugging seal or the use of two independent pluggers and fittings. Both approaches are expensive; use relatively large, heavy components; and require a lot of equipment to properly install. Additionally, the metal-to-metal plugging seal approach does not allow for bypassing pipeline product through a fitting. If a bypass is required, a second fitting must be installed upstream of the plugging seal.
- U.S. Pat. No. 7,270,139 issued to Calkins et al. on Sep. 18, 2007, discloses a cam-assisted, wedge actuated, double block and bleed, metal-to-metal plugger.
- a pair of wedge members is forced against a rearward surface of the metal sealing cups to simultaneously force the cups into metal-to-metal sealing contact with the sealing surfaces formed by opposing toroidal collars welded to the exterior of the pipe. Because of the metal-to-metal seal, requires that each collar have precise face surfaces and that each collar be precisely welded onto the pipe and accurately spaced in relation to one another.
- the plugger cannot seal against the cut and relatively rough ends of a pipe.
- the plug includes pivotally connected plugging heads which work in combination to seal against an interior wall surface of the pipe downstream of the access opening to the pipe.
- the first plugging head prevents flow of product in the pipe and the second plugging head captures any leakage past the first head and forces that leakage out through a fitting.
- the plug may include standard sealing elements or an inflation system used in combination with inflatable sealing elements or compression packer sealing elements. Although the plug does not require a precise sealing surface, the plug is not configured to seal against the cut ends of the access opening to the pipe.
- a plugging device for double blocking a section of pipeline or piping includes a first and second sealing element, each sealing element having a rearward surface and a forward sealing surface. At least one cylinder that is extendable between a retracted first position and an extended second position is in communication with the rearward surface of the sealing element.
- the sealing element is an elastomeric sealing element and may be cup-shaped, convex-shaped element, or cork-shaped element.
- An internal passageway or a tubing provides fluid to each cylinder, and each cylinder may be operated independent of the other.
- the opposing cut end of the pipe may be square-shaped or fish-mouth-shaped.
- a method for double blocking a section of pipeline or piping using a plugging device includes the steps of:
- plugging device inserting between the opposing pipe ends, the plugging device having two sealing elements and at least one telescoping cylinder located between the two sealing elements and in communication with at least one of the two sealing elements;
- FIG. 1 is a cross-sectional view of a section of piping or pipeline in which a plugging device having two sealing elements has been inserted.
- Each sealing element is connected to a telescoping cylinder arrangement.
- a locating pin provides a means for locating the sealing elements in axial alignment with opposing cut, square ends of the pipe.
- a tubing connects the telescoping cylinder to a fluid power source such as a hand pump to actuate the cylinder between a retracted, first position and an extended, second position.
- FIG. 1A is a view of a section of pipeline in which the collars with sealing surfaces have been eliminated.
- FIG. 2 is a view of the plugging device with each cylinder in its extended second position.
- the sealing elements sealably engage the cut ends of the pipe as well as the sealing surfaces of two opposing collars welded to the exterior of the pipe.
- FIG. 2A is a view of the plugging device with each cylinder in its extended second position.
- the forward sealing surface of each element sealably engages the opposing square end of the pipe as well as portions of the interior and exterior wall of the pipe.
- FIG. 3 is a view of the plugging device as it moves into sealing engagement with a section of pipeline having fish-mouth-shaped cut ends.
- FIG. 3A is a view of the plugging device taken along section line 3 A- 3 A of FIG. 3 .
- the forward sealing surface of each sealing element is a convex-shaped surface to sealably engage the opposing fish-mouth-shaped ends of the pipe.
- An internal passageway provides a source of fluid power to the cylinder.
- FIG. 4 is a view of the plugging device having a cork-shaped sealing element in sealing engagement with the opposing fish-mouth-shaped ends of the pipe.
- FIG. 4A is a view of the plugging device taken along section line 4 A- 4 A of FIG. 4 .
- FIG. 5 is a view of the plugging device having a cork-shaped sealing element in sealing engagement with the opposing square-shaped cut ends of the pipe.
- FIG. 5A is a view of the plugging device taken along section line 5 A- 5 A of FIG. 5 .
- a fitting In the typical hot tapping application, a fitting—usually in the form of a flange—is welded on the exterior of a pipe that has flowing gas or liquid under pressure.
- the fitting may also be a spherical fitting that is secured to opposing toroidal collars that have been welded to the exterior of the pipe.
- a valve is then secured to the flange and a hot tapping machine is secured to the valve.
- a hole can then be drilled through the wall of the pipe while gas or liquid continues to flow through it. This provides access to the interior of the pipe, such as for inserting equipment to temporary block flow through the pipe while repairs are being made.
- the fish-mouth-shaped ends of the opposing cut ends of the pipe may be cut to provide square ends.
- a containment housing 80 for a hot tapping application includes a fitting 82 and two spaced-apart and opposing toroidal collars 84 and 88 .
- Collars 84 and 88 may be part of fitting 82 or separate collars welded to an exterior wall surface 106 , 116 , respectively, of a section of pipe or pipeline 100 .
- Each collar 84 , 88 has a sealing face surface 86 , 90 , respectively.
- Fitting 82 may have a spherical shape.
- a plugging device 10 is extended out of containment housing 80 until the downward travel of plugging device 10 is arrested by a locator receiver 94 engaging a locator pin 92 .
- Hydraulic cylinder 60 and cylinder rod 30 provide means for lowering plugging device 10 out of containment housing 80 , through the access hole, and into an interior portion of pipe 100 .
- Locator pin 92 is designed to ensure that the sealing elements 50 , 70 of plugging device 10 are in axial alignment with pipe 100 .
- a telescoping cylinder arrangement 20 provides means for each sealing element 50 , 70 to move between a retracted first position and an extended second position relative to the respective opposing cut ends 102 , 112 of pipe 100 .
- Telescoping cylinder arrangement 20 preferably includes two cylinders 24 , 26 in communication with a fluid power source 40 .
- Cylinders 24 and 26 are housed in a housing 22 which receives a fitting 28 connected to a tubing 32 .
- a second fitting 36 is provided on containment housing 80 for connecting fluid supply line 38 and placing line 38 in communication with tubing 32 .
- Fluid power source 40 which may be a hand pump-supplies air, inert gas or hydraulic fluid to cylinders 24 , 26 .
- Sealing elements 50 and 70 have a forward surface 52 , 72 , respectively, and a rearward surface 56 , 76 respectively. A portion of the rearward surfaces 56 and 76 are in communication with the cylinders 24 and 26 , respectively.
- Forward surface 52 , 72 has an elastomeric sealing surface 54 , 74 . When cylinders 24 and 26 are in their extended second position, elastomeric sealing surfaces 54 and 74 engage the respective opposing sealing surfaces 86 and 90 of collars 84 and 88 .
- FIGS. 1A and 2A illustrate an alternate preferred embodiment of plugging device 10 .
- Collars 84 and 88 are eliminated.
- elastomeric sealing surfaces 54 and 74 sealably engage the respective opposing cut ends 102 and 112 of pipe 100 as well as a portion of the interior walls 104 and 114 and exterior walls 106 and 116 , respectively.
- FIGS. 3 and 3A illustrate another preferred embodiment of plugging device 10 .
- the forward surfaces 52 and 72 of sealing elements 50 and 70 are convex-shaped forward surfaces to sealably engage fish-mouth-shaped cut ends 102 and 112 .
- Forward surfaces 52 and 72 preferably have an elastomeric sealing surface 54 , 74 , respectively.
- Tubing 32 may be replaced by an internal passageway 34 .
- Sealing elements 50 and 70 are frusto-conical or cork-shaped elastomeric or metallic sealing elements.
- a circumferential surface 58 , 78 of the sealing element 50 , 70 sealably engages a portion of the opposing inner wall surface 104 , 114 and cut ends 102 and 112 .
- Cut ends 102 and 112 may be fish-mouth shaped ends or square-shaped ends.
Abstract
Description
- This invention relates generally to pipe plugs, particularly plugs for use in pipelines that carry high or low pressure fluids, high or low temperature fluids, steam, dangerous fluids, and environmentally hazardous fluids.
- “Double block and bleed” is a well-known term of art that refers to setting two seals in a pipe and opening a bleed port between the seals to ensure that the first seal is holding. Any leakage past the first seal is contained by the second seal and forced to exit through the bleed port. This arrangement ensures that the pipe is completely sealed, making it safe to work on downstream of the two seals.
- Achieving double-block and bleed typically requires the use of a single, metal-to-metal plugging seal or the use of two independent pluggers and fittings. Both approaches are expensive; use relatively large, heavy components; and require a lot of equipment to properly install. Additionally, the metal-to-metal plugging seal approach does not allow for bypassing pipeline product through a fitting. If a bypass is required, a second fitting must be installed upstream of the plugging seal.
- U.S. Pat. No. 7,270,139, issued to Calkins et al. on Sep. 18, 2007, discloses a cam-assisted, wedge actuated, double block and bleed, metal-to-metal plugger. A pair of wedge members is forced against a rearward surface of the metal sealing cups to simultaneously force the cups into metal-to-metal sealing contact with the sealing surfaces formed by opposing toroidal collars welded to the exterior of the pipe. Because of the metal-to-metal seal, requires that each collar have precise face surfaces and that each collar be precisely welded onto the pipe and accurately spaced in relation to one another. The plugger cannot seal against the cut and relatively rough ends of a pipe.
- Another style of double block and bleed plug that eliminates many of the disadvantages of typical double block and bleed pluggers is disclosed in U.S. patent applications Ser. Nos. 11/936,182 and 12/256,150, filed by Yeazel et al. on Nov. 7, 2007 and Oct. 22, 2008, respectively. The plug includes pivotally connected plugging heads which work in combination to seal against an interior wall surface of the pipe downstream of the access opening to the pipe. The first plugging head prevents flow of product in the pipe and the second plugging head captures any leakage past the first head and forces that leakage out through a fitting. The plug may include standard sealing elements or an inflation system used in combination with inflatable sealing elements or compression packer sealing elements. Although the plug does not require a precise sealing surface, the plug is not configured to seal against the cut ends of the access opening to the pipe.
- A plugging device for double blocking a section of pipeline or piping includes a first and second sealing element, each sealing element having a rearward surface and a forward sealing surface. At least one cylinder that is extendable between a retracted first position and an extended second position is in communication with the rearward surface of the sealing element. A means for actuating the cylinder-which may be a fluid power source-is provided and the forward sealing surface engages an opposing cut end of the pipe when the cylinder is in the second extended position. The sealing element is an elastomeric sealing element and may be cup-shaped, convex-shaped element, or cork-shaped element. An internal passageway or a tubing provides fluid to each cylinder, and each cylinder may be operated independent of the other. The opposing cut end of the pipe may be square-shaped or fish-mouth-shaped.
- A method for double blocking a section of pipeline or piping using a plugging device according to this invention includes the steps of:
- (a) cutting and removing a length of pipe so as to leave two open and opposing pipe ends;
- (b) inserting a plugging device between the opposing pipe ends, the plugging device having two sealing elements and at least one telescoping cylinder located between the two sealing elements and in communication with at least one of the two sealing elements;
- (c) aligning the plugging device so that each sealing element is in axial alignment with a respective opposing pipe end; and
- (d) activating the cylinder to move between a retracted first position and an extended second position, the at least one of the two sealing elements being in sealing engagement with a respective opposing pipe end when the cylinder is in the extended second position.
- A better understanding of the invention will be obtained from the following detailed description of the preferred embodiments taken in conjunction with the drawings and the attached claims.
-
FIG. 1 is a cross-sectional view of a section of piping or pipeline in which a plugging device having two sealing elements has been inserted. Each sealing element is connected to a telescoping cylinder arrangement. A locating pin provides a means for locating the sealing elements in axial alignment with opposing cut, square ends of the pipe. A tubing connects the telescoping cylinder to a fluid power source such as a hand pump to actuate the cylinder between a retracted, first position and an extended, second position. -
FIG. 1A is a view of a section of pipeline in which the collars with sealing surfaces have been eliminated. -
FIG. 2 is a view of the plugging device with each cylinder in its extended second position. The sealing elements sealably engage the cut ends of the pipe as well as the sealing surfaces of two opposing collars welded to the exterior of the pipe. -
FIG. 2A is a view of the plugging device with each cylinder in its extended second position. The forward sealing surface of each element sealably engages the opposing square end of the pipe as well as portions of the interior and exterior wall of the pipe. -
FIG. 3 is a view of the plugging device as it moves into sealing engagement with a section of pipeline having fish-mouth-shaped cut ends. -
FIG. 3A is a view of the plugging device taken alongsection line 3A-3A ofFIG. 3 . The forward sealing surface of each sealing element is a convex-shaped surface to sealably engage the opposing fish-mouth-shaped ends of the pipe. An internal passageway provides a source of fluid power to the cylinder. -
FIG. 4 is a view of the plugging device having a cork-shaped sealing element in sealing engagement with the opposing fish-mouth-shaped ends of the pipe. -
FIG. 4A is a view of the plugging device taken alongsection line 4A-4A ofFIG. 4 . -
FIG. 5 is a view of the plugging device having a cork-shaped sealing element in sealing engagement with the opposing square-shaped cut ends of the pipe. -
FIG. 5A is a view of the plugging device taken alongsection line 5A-5A ofFIG. 5 . - Preferred embodiments of a telescoping cylinder double block and bleed plug will now be described with reference to the drawings and the following elements:
-
- 10 Plugging device
- 20 Telescoping arrangement
- 22 Housing
- 24 First cylinder
- 26 Second cylinder
- 28 Fitting
- 30 Cylinder rod
- 32 Tubing/passageway
- 34 Internal passageway
- 36 Bulkhead fitting
- 38 Supply line
- 40 Fluid source
- 50 Sealing element
- 52 Forward sealing surface
- 54 Elastomeric seal
- 56 Rearward surface
- 58 Circumferential surface
- 60 Hydraulic cylinder
- 70 Sealing element
- 72 Forward sealing surface
- 74 Elastomeric seal
- 76 Rearward surface
- 78 Circumferential surface
- 80 Containment housing
- 82 Fitting
- 84 Collar
- 86 Sealing surface
- 88 Collar
- 90 Sealing surface
- 92 Locator pin
- 94 Locator pin receiver
- 100 Pipe
- 102 Cut end
- 104 Internal wall surface
- 106 External wall surface
- 112 Cut end
- 114 Internal wall surface
- 116 External wall surface
- In the typical hot tapping application, a fitting—usually in the form of a flange—is welded on the exterior of a pipe that has flowing gas or liquid under pressure. The fitting may also be a spherical fitting that is secured to opposing toroidal collars that have been welded to the exterior of the pipe. A valve is then secured to the flange and a hot tapping machine is secured to the valve. By use of specialized equipment, a hole can then be drilled through the wall of the pipe while gas or liquid continues to flow through it. This provides access to the interior of the pipe, such as for inserting equipment to temporary block flow through the pipe while repairs are being made. The fish-mouth-shaped ends of the opposing cut ends of the pipe may be cut to provide square ends.
- Referring to the drawings and first to
FIGS. 1 and 2 , acontainment housing 80 for a hot tapping application includes a fitting 82 and two spaced-apart and opposingtoroidal collars Collars exterior wall surface pipeline 100. Eachcollar face surface - A plugging
device 10 is extended out ofcontainment housing 80 until the downward travel of pluggingdevice 10 is arrested by alocator receiver 94 engaging alocator pin 92.Hydraulic cylinder 60 andcylinder rod 30 provide means for lowering pluggingdevice 10 out ofcontainment housing 80, through the access hole, and into an interior portion ofpipe 100.Locator pin 92 is designed to ensure that the sealingelements device 10 are in axial alignment withpipe 100. Atelescoping cylinder arrangement 20 provides means for each sealingelement pipe 100. -
Telescoping cylinder arrangement 20 preferably includes twocylinders fluid power source 40.Cylinders housing 22 which receives a fitting 28 connected to atubing 32. Asecond fitting 36 is provided oncontainment housing 80 for connectingfluid supply line 38 and placingline 38 in communication withtubing 32. Fluid power source 40-which may be a hand pump-supplies air, inert gas or hydraulic fluid tocylinders -
Sealing elements forward surface rearward surface cylinders Forward surface elastomeric sealing surface cylinders surfaces collars -
FIGS. 1A and 2A illustrate an alternate preferred embodiment of pluggingdevice 10.Collars cylinders pipe 100 as well as a portion of theinterior walls exterior walls -
FIGS. 3 and 3A illustrate another preferred embodiment of pluggingdevice 10. The forward surfaces 52 and 72 of sealingelements elastomeric sealing surface Tubing 32 may be replaced by aninternal passageway 34. - Referring now to
FIGS. 4 to 5A , another preferred embodiment of pluggingdevice 10 is illustrated.Sealing elements circumferential surface element inner wall surface - While a telescoping plugging device has been described with a certain degree of particularity, many changes may be made in the details of construction and the arrangement of components without departing from the spirit and scope of this disclosure. A telescoping plugging device made according to this disclosure, therefore, is not limited to the embodiments set forth herein, but is limited only by the scope of the attached claims, including the full range of equivalency to which each element thereof is entitled.
Claims (20)
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/351,479 US7766047B1 (en) | 2009-01-09 | 2009-01-09 | Telescoping double blocking pipe plug |
DK10729419.1T DK2376826T3 (en) | 2009-01-09 | 2010-01-05 | Telescopic plug for double blocking and venting |
PCT/US2010/020129 WO2010080760A1 (en) | 2009-01-09 | 2010-01-05 | Telescoping double block and bleed plug |
ES10729419.1T ES2621384T3 (en) | 2009-01-09 | 2010-01-05 | Double telescopic and bleeding stopper |
EP10729419.1A EP2376826B1 (en) | 2009-01-09 | 2010-01-05 | Telescoping double block and bleed plug |
HUE10729419A HUE033339T2 (en) | 2009-01-09 | 2010-01-05 | Telescoping double block and bleed plug |
PL10729419T PL2376826T3 (en) | 2009-01-09 | 2010-01-05 | Telescoping double block and bleed plug |
ARP100100046A AR075003A1 (en) | 2009-01-09 | 2010-01-08 | DOUBLE BLOCK AND PURGE TELESCOPIC SHUTTER |
CY20171100528T CY1119144T1 (en) | 2009-01-09 | 2017-05-19 | Dual barrier and ventilation telescopic plug |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/351,479 US7766047B1 (en) | 2009-01-09 | 2009-01-09 | Telescoping double blocking pipe plug |
Publications (2)
Publication Number | Publication Date |
---|---|
US20100175771A1 true US20100175771A1 (en) | 2010-07-15 |
US7766047B1 US7766047B1 (en) | 2010-08-03 |
Family
ID=42316776
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/351,479 Active US7766047B1 (en) | 2009-01-09 | 2009-01-09 | Telescoping double blocking pipe plug |
Country Status (9)
Country | Link |
---|---|
US (1) | US7766047B1 (en) |
EP (1) | EP2376826B1 (en) |
AR (1) | AR075003A1 (en) |
CY (1) | CY1119144T1 (en) |
DK (1) | DK2376826T3 (en) |
ES (1) | ES2621384T3 (en) |
HU (1) | HUE033339T2 (en) |
PL (1) | PL2376826T3 (en) |
WO (1) | WO2010080760A1 (en) |
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CN105090607A (en) * | 2015-07-13 | 2015-11-25 | 哈托利海托阀门(杭州)有限公司 | High-sealing-performance gate valve |
US20180045333A1 (en) * | 2015-03-05 | 2018-02-15 | Vat Holding Ag | Vacuum valve |
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US8047219B2 (en) * | 2009-03-13 | 2011-11-01 | Tdw Delaware Inc. | Block and bleed plugging tool employing seals on a pipeline exterior |
DE102011015819A1 (en) * | 2011-04-01 | 2012-10-04 | Claus Grosser | industrial valves |
US20140283926A1 (en) * | 2013-03-19 | 2014-09-25 | Joshua Duell | Foldable, Double-Block and Bleed Plugging Tool |
TWI567319B (en) * | 2014-09-11 | 2017-01-21 | 林睿哲 | A pipeline non-stop transmission device and the application method thereof |
US9897240B2 (en) | 2015-04-15 | 2018-02-20 | Team Industrial Services, Inc. | Weld on insert valve |
CN105065700B (en) * | 2015-07-13 | 2017-07-18 | 哈托利海托阀门(杭州)有限公司 | A kind of self-sealed gate valve structure |
CA3110970A1 (en) | 2018-08-30 | 2020-03-05 | Team Industrial Services Inc. | Pipe isolation device |
US20230022125A1 (en) * | 2019-12-17 | 2023-01-26 | Team Industrial Services, Inc. | Pipe isolation device with seal |
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- 2010-01-05 WO PCT/US2010/020129 patent/WO2010080760A1/en active Application Filing
- 2010-01-05 PL PL10729419T patent/PL2376826T3/en unknown
- 2010-01-05 HU HUE10729419A patent/HUE033339T2/en unknown
- 2010-01-05 ES ES10729419.1T patent/ES2621384T3/en active Active
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US20180045333A1 (en) * | 2015-03-05 | 2018-02-15 | Vat Holding Ag | Vacuum valve |
US10539253B2 (en) * | 2015-03-05 | 2020-01-21 | Vat Holding Ag | Vacuum valve |
CN105090607A (en) * | 2015-07-13 | 2015-11-25 | 哈托利海托阀门(杭州)有限公司 | High-sealing-performance gate valve |
Also Published As
Publication number | Publication date |
---|---|
ES2621384T3 (en) | 2017-07-03 |
DK2376826T3 (en) | 2017-05-01 |
WO2010080760A1 (en) | 2010-07-15 |
AR075003A1 (en) | 2011-03-02 |
EP2376826A4 (en) | 2013-10-30 |
HUE033339T2 (en) | 2017-11-28 |
PL2376826T3 (en) | 2017-09-29 |
US7766047B1 (en) | 2010-08-03 |
EP2376826A1 (en) | 2011-10-19 |
EP2376826B1 (en) | 2017-03-22 |
CY1119144T1 (en) | 2018-02-14 |
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