US3590877A - Explosive-activated plug - Google Patents

Explosive-activated plug Download PDF

Info

Publication number
US3590877A
US3590877A US761273A US3590877DA US3590877A US 3590877 A US3590877 A US 3590877A US 761273 A US761273 A US 761273A US 3590877D A US3590877D A US 3590877DA US 3590877 A US3590877 A US 3590877A
Authority
US
United States
Prior art keywords
explosive
cylindrical
plug
bore
tube
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.)
Expired - Lifetime
Application number
US761273A
Other languages
English (en)
Inventor
Phillip M Leopold
Louis A Sturiale
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Babcock and Wilcox Co
Original Assignee
Babcock and Wilcox Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Babcock and Wilcox Co filed Critical Babcock and Wilcox Co
Application granted granted Critical
Publication of US3590877A publication Critical patent/US3590877A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F11/00—Arrangements for sealing leaky tubes and conduits
    • F28F11/02—Arrangements for sealing leaky tubes and conduits using obturating elements, e.g. washers, inserted and operated independently of each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
    • B21D39/042—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods using explosives
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00—Blasting cartridges, i.e. case and explosive
    • F42B3/006—Explosive bolts; Explosive actuators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42D—BLASTING
    • F42D3/00—Particular applications of blasting techniques
    • 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
    • Y10T29/49805—Shaping by direct application of fluent pressure

Definitions

  • Maguire ABSTRACT A plug which can be inserted into a tube and containing a shaped explosive charge which is detonated to expand the plug against the surrounding tube surface with an impact that effects a circumferential weld bond between the plug and tube surface to seal the tube.
  • This invention relates in general to the art of explosive welding, and more particularly to an explosive-activated metal plug which can be inserted into a tube or the like and then detonated into a sealing configuration.
  • the invention avoids these disadvantages of prior art welded plugs by employing an explosive activated plug in the form of a hollow metal body that is inserted into the bore of a metal tube to be sealed, and which contains a shaped explosive charge and a detonator which can be set off from a remote location to detonate the charge and thereby expand the plug body against the tube surface with an impact of sufficient force that it creates a zone of metallurgically bonded metal contact between the plug and surrounding tube surface, which zone extends completely around the circumference of the plug body and along an axial length portion thereof intermediate its ends.
  • This metallurgically bonded, or weld, zone comprises a considerably greater area of the plug surface than is possible when using the conventional seal welding just around the exposed end ofthe plug.
  • FIG. 1 is a longitudinal view, partly in section, of an explosive-activated plug according to a preferred embodiment of the invention shown as inserted into a tube to be sealed and prior to detonation.
  • FIG. 2 is a transverse cross-sectional view of the plug and tube shown in FIG. 1 as taken along line 2-2 therein.
  • FIG. 3 is a longitudinal sectional view of the plug and tube shown in FIG. 1 as seen after detonation.
  • FIGS. 1 and 2 there is illustrated, by way of example, a typical explosive-activated plug 10 constructed in accordance with the invention.
  • the plug 10 has an elongated hollow metal body 11, which is generally cylindrical in form, closed at one end 12, and open at its other end 13.
  • the plug 10 is inserted into the bore of a metal tube 14 that is to be sealed, the end portion of tube 14 being received and retained by a tube sheet 15, as in a typical heat exchanger (not shown).
  • Detonator 17 is preferrably an electrically operable type having lead wires 18 extending out through the open rear end 13 of plug body ll for connection to a remote firing circuit (not shown).
  • the charge 16 is so distributed and arranged that when set off by the detonator 17, the resultant explosion expands the plug body 11 against the surrounding tube surface 19 with an impact that drives the exterior surface 20 of plug body 11 into metallurgically bonded contact, i.e. cold-welding fusion, with tube surface 19 over a zone 22 extending completely around the circumference of body 11 and along an axial length portion thereof intermediate the ends 12 and 13, as better seen in FIG. 3.
  • an explosive charge 16 made up from a cylindrical block 23 of explosive material which is positioned axially in generally centered relation to the axial limits intended for zone 22, and in contact with detonator 17; a cylindrical sheet 24 of explosive material positioned in contiguous adjoining relation to the block 23; and a conical sheet 25 of explosive material positioned in contiguous adjoining relation to block 23 and cylindrical sheet 24.
  • the plug body 11 is made with a cylindrical bore section 26 extending axially inward from the open end 13, and a tapered blind bore section 27 that communicates with the cylindrical bore section 26 and tapers with increasing cross-sectional metal volume toward the closed end ofplug body 11.
  • the plug body 11 is most heavily reinforced at its forward end 12 whereas from its center toward its rear end 13 the wall thickness of body 11 is considerably lighter. This prevents blowout at the forward end portion of plug 10, which, if it occurred, would destroy its usefulness as a sealing means for tube 14.
  • the plug body 11 is provided with a pair of radially projecting flange parts 30 that engage the tube surface 19 and serve to support the plug body 11 in a coaxial spaced relation to the tube 14 such that prior to detonation of the charge 16, a predetermined radial standoff distance is established between tube surface 19 and the cylindrical exterior surface portion 31 of body 11. The provision of such standoff distance allows the development of sufficient impact velocity along the plug surface 31 upon detonation of the explosive charge to achieve good bonding to tube surface 19.
  • a prototype heat exchanger was constructed using Inconel tubes five-eighths inch CD. by 0.035 inch wall thickness received in a 23% inches thick AISI 1020 steel tube sheet having 0.635-inch diameter tube holes spaced 0.875 inch center-to-center. The tubes were roll expanded into the holes over a depth of threequarters inch and then seal welded to the tube sheet.
  • the plugs were machined from lnconel bar stock of the same alloy as that used for the tubes.
  • the explosive charge 116 was made up from Detasheet C which is a PETN-base explosive manufactured by Du Pont.
  • the cylindrical block 23 was approximately threeeights inch diameter by three-sixteenths inch thick and weighed 4.6 grains.
  • the cylindrical sheet 24 and conical sheet 25 portions of charge 16 were made by wrapping Detasheet around styrofoam filler pieces such as those exemplified by 29 and 28 and taping the outside of the assembled charge 16 and filler pieces 28, 29 to retain the several components in their desired relative positions.
  • the cylindrical and conical sheets 24 and 25 were both approximately one-sixteenth inch thick and weighed 28.9 grains and 14.0 grains respectively.
  • the detonator 17 used for each test plug was a X-549-D Minidet type manufactured by Du Pont.
  • the lnconel tubes were first oxidized in a steam atmosphere of 900 F. for 20 days.
  • the resultant oxide coating on the inside of the tubes is believed to be representative of the worst that would be encountered in actual heat exchanger service.
  • the tubes were then explosively plugged using the apparatus and method here disclosed without any further surface preparation.
  • the plugged tubes were given a helium leak check using 2,000 p.s.i. helium pressure behind each plug, and again no leakage was detected.
  • An explosive-activated plug which comprises a generally cylindrical hollow metal body open at one end and closed at the opposite end and disposed for insertion into the bore of a metal tube to be sealed, a shaped explosive charge retained within said hollow body, said explosive charge having an explosive material distributed lengthwise within said body and including a cylindrical block of explosive material, a cylindrical sheet of explosive material positioned in contiguous adjoining relation to said cylindrical block, and a conical sheet of explosive material positioned in contiguous adjoining relation to said cylindrical block, and means disposed within said body and operable from a location outside thereof to detonate said explosive charge and thereby expand said body radially outward against the surrounding tube surface with an impact energy effecting a metallurgically bonded contact between said body and surface to seal the bore, said contact being over a zone extending completely around the circumference of the body and along an axial length portion thereof intermediate said ends.
  • An explosive-activated plug as defined in claim 3 including filler means disposed within said body to support said cylindrical sheet of explosive material in contact with the surface of said cylindrical bore, and to support said conical sheet of explosive material in contact with the surface of said tapered blind bore.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
US761273A 1968-09-20 1968-09-20 Explosive-activated plug Expired - Lifetime US3590877A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US76127368A 1968-09-20 1968-09-20

Publications (1)

Publication Number Publication Date
US3590877A true US3590877A (en) 1971-07-06

Family

ID=25061730

Family Applications (1)

Application Number Title Priority Date Filing Date
US761273A Expired - Lifetime US3590877A (en) 1968-09-20 1968-09-20 Explosive-activated plug

Country Status (3)

Country Link
US (1) US3590877A (en))
FR (1) FR2018520A1 (en))
GB (1) GB1285911A (en))

Cited By (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3698067A (en) * 1969-09-23 1972-10-17 Sulzer Ag Method for mounting a pipe in a perforated plate
US3724062A (en) * 1971-03-18 1973-04-03 Westinghouse Electric Corp Explosively welded plug for leaky tubes of a heat exchanger and method of using the same
DE2210921A1 (de) * 1972-03-07 1973-09-20 Interatom Absperrvorrichtung fuer rohrleitungen mittels eines plastisch verformbaren dichtkoerpers
US3774291A (en) * 1972-08-04 1973-11-27 Us Air Force Explosive bonding of tubes to fittings
US3797098A (en) * 1972-09-14 1974-03-19 Nasa Totally confined explosive welding
US3900939A (en) * 1973-10-31 1975-08-26 Combustion Eng Method of plugging steam generator tubes
US3912148A (en) * 1974-04-30 1975-10-14 Babcock & Wilcox Co Combination welding and brazing device
DE2537373A1 (de) * 1974-08-28 1976-03-11 Int Research & Dev Company Ltd Verfahren zum befestigen eines rohres in einer bohrung durch explosiv- schweissen
US4021907A (en) * 1974-09-16 1977-05-10 Explosive Metal Working Holland B.V. Method of sealing apertures in tube plates of heat exchangers using explosive plug
US4028789A (en) * 1976-03-29 1977-06-14 Westinghouse Electric Corporation Method of installing a sleeve in one end of a tube
US4074630A (en) * 1976-02-27 1978-02-21 Explosive Metal Working Holland B.V. Methods and plugs to seal apertures in tube plates of heat exchangers provided with tube plates which are locally sealed with these methods and such plates
US4158370A (en) * 1978-06-09 1979-06-19 The Babcock & Wilcox Company Explosive activated plug
US4290543A (en) * 1977-04-06 1981-09-22 The Babcock & Wilcox Company Support plug
US4347790A (en) * 1979-07-11 1982-09-07 Cockerill And Centre De Technologies Nouvelles Explosive plug for blocking tubes
US4352379A (en) * 1977-04-06 1982-10-05 The Babcock & Wilcox Company Pressure vessel tube sealing and support method
US4425944A (en) 1980-11-17 1984-01-17 Kraftwerk Union Aktiengesellschaft Repair plug for heat exchanger tubes, especially for steam generators of pressurized-weather nuclear power plants
US4446891A (en) * 1980-11-04 1984-05-08 Gebelius Sven Runo Vilhelm Method for repairing and/or reinforcing a pipe system, and a device for utilization of the method
US4513786A (en) * 1983-04-14 1985-04-30 Combustion Engineering, Inc. Mechanical tube plub
US4587904A (en) * 1985-01-07 1986-05-13 Foster Wheeler Energy Corporation Debris free plug assembly for heat exchange tubes
US4685205A (en) * 1985-08-26 1987-08-11 Foster Wheeler Development Corporation Apparatus for forming an explosively expanded tube-tube sheet joint including a barrier tube
US4708280A (en) * 1985-10-23 1987-11-24 The United States Of America As Represented By The Administrator, National Aeronautics & Space Administration Tool and process for miniature explosive joining of tubes
US4751944A (en) * 1986-05-28 1988-06-21 Westinghouse Electric Corp. Duplex mechanical tube plug
US5022148A (en) * 1989-04-07 1991-06-11 The Babcock & Wilcox Company Method for explosively welding a sleeve into a heat exchanger tube
US5038994A (en) * 1987-10-13 1991-08-13 The Babcock & Wilcox Company Apparatus for explosively welding a sleeve into a heat exchanger tube
DE4113315A1 (de) * 1991-04-24 1992-10-29 Klaus Pomorin Rohrduebelpatrone
US5479961A (en) * 1994-12-09 1996-01-02 Senior Engineering Company Method of plugging a heat exchanger tube and plug therefor
US5566444A (en) * 1994-03-14 1996-10-22 Korea Heavy Industries & Construction Company Tube-plugging assembly
US7530485B1 (en) * 2006-02-07 2009-05-12 High Energy Metals, Inc. Method for explosive bonding of tubular metal liners
US11002097B2 (en) 2018-08-16 2021-05-11 James G. Rairigh Shaped charge assembly, explosive units, and methods for selectively expanding wall of a tubular
US11015410B2 (en) * 2018-08-16 2021-05-25 James G. Rairigh Dual end firing explosive column tools and methods for selectively expanding a wall of a tubular
US20220325590A1 (en) * 2019-07-19 2022-10-13 DynaEnergetics Europe GmbH Ballistically actuated wellbore tool
US11480021B2 (en) 2018-08-16 2022-10-25 James G. Rairigh Shaped charge assembly, explosive units, and methods for selectively expanding wall of a tubular
US11536104B2 (en) 2018-08-16 2022-12-27 James G. Rairigh Methods of pre-testing expansion charge for selectively expanding a wall of a tubular, and methods of selectively expanding walls of nested tubulars
US11781393B2 (en) 2018-08-16 2023-10-10 James G. Rairigh Explosive downhole tools having improved wellbore conveyance and debris properties, methods of using the explosive downhole tools in a wellbore, and explosive units for explosive column tools
US12392211B2 (en) 2018-08-16 2025-08-19 W.T. Bell International, Inc. Explosive downhole tools having improved wellbore conveyance and debris properties, methods of using the explosive downhole tools in a wellbore, and explosive units for explosive column tools

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4502511A (en) * 1983-01-03 1985-03-05 Westinghouse Electric Corp. Tube plug
FR2563126A1 (fr) * 1984-04-20 1985-10-25 Barras Provence Dispositif pour obturer des tubes par effet hydro-electrique

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US311149A (en) * 1885-01-20 Chimney for dwelling-houses
US2214226A (en) * 1939-03-29 1940-09-10 English Aaron Method and apparatus useful in drilling and producing wells
US3126918A (en) * 1964-03-31 Slip ring spacer for insulated conduit systems
US3263323A (en) * 1965-10-21 1966-08-02 United Aircraft Corp Fabrication of a continuous peripheral joint
US3290770A (en) * 1965-05-13 1966-12-13 Silverman Daniel Method of simultaneously deforming two overlapping tubular metal elements to form interlocking ridges
US3292253A (en) * 1963-12-24 1966-12-20 Siemens Ag Method of seamless explosive plating or cladding of thick-walled vessels
US3358349A (en) * 1964-08-05 1967-12-19 Darlite Corp Method of explosion cladding irregular aluminum objects
US3364561A (en) * 1966-02-10 1968-01-23 Du Pont Explosive tube bonding
US3491798A (en) * 1967-01-17 1970-01-27 Texaco Inc Explosive type expansible plug

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US311149A (en) * 1885-01-20 Chimney for dwelling-houses
US3126918A (en) * 1964-03-31 Slip ring spacer for insulated conduit systems
US2214226A (en) * 1939-03-29 1940-09-10 English Aaron Method and apparatus useful in drilling and producing wells
US3292253A (en) * 1963-12-24 1966-12-20 Siemens Ag Method of seamless explosive plating or cladding of thick-walled vessels
US3358349A (en) * 1964-08-05 1967-12-19 Darlite Corp Method of explosion cladding irregular aluminum objects
US3290770A (en) * 1965-05-13 1966-12-13 Silverman Daniel Method of simultaneously deforming two overlapping tubular metal elements to form interlocking ridges
US3263323A (en) * 1965-10-21 1966-08-02 United Aircraft Corp Fabrication of a continuous peripheral joint
US3364561A (en) * 1966-02-10 1968-01-23 Du Pont Explosive tube bonding
US3491798A (en) * 1967-01-17 1970-01-27 Texaco Inc Explosive type expansible plug

Cited By (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3698067A (en) * 1969-09-23 1972-10-17 Sulzer Ag Method for mounting a pipe in a perforated plate
US3724062A (en) * 1971-03-18 1973-04-03 Westinghouse Electric Corp Explosively welded plug for leaky tubes of a heat exchanger and method of using the same
DE2210921A1 (de) * 1972-03-07 1973-09-20 Interatom Absperrvorrichtung fuer rohrleitungen mittels eines plastisch verformbaren dichtkoerpers
US3774291A (en) * 1972-08-04 1973-11-27 Us Air Force Explosive bonding of tubes to fittings
US3797098A (en) * 1972-09-14 1974-03-19 Nasa Totally confined explosive welding
US4106687A (en) * 1972-09-14 1978-08-15 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Totally confined explosive welding
US3900939A (en) * 1973-10-31 1975-08-26 Combustion Eng Method of plugging steam generator tubes
US3912148A (en) * 1974-04-30 1975-10-14 Babcock & Wilcox Co Combination welding and brazing device
DE2537373A1 (de) * 1974-08-28 1976-03-11 Int Research & Dev Company Ltd Verfahren zum befestigen eines rohres in einer bohrung durch explosiv- schweissen
US4021907A (en) * 1974-09-16 1977-05-10 Explosive Metal Working Holland B.V. Method of sealing apertures in tube plates of heat exchangers using explosive plug
US4074630A (en) * 1976-02-27 1978-02-21 Explosive Metal Working Holland B.V. Methods and plugs to seal apertures in tube plates of heat exchangers provided with tube plates which are locally sealed with these methods and such plates
US4028789A (en) * 1976-03-29 1977-06-14 Westinghouse Electric Corporation Method of installing a sleeve in one end of a tube
US4290543A (en) * 1977-04-06 1981-09-22 The Babcock & Wilcox Company Support plug
US4352379A (en) * 1977-04-06 1982-10-05 The Babcock & Wilcox Company Pressure vessel tube sealing and support method
US4158370A (en) * 1978-06-09 1979-06-19 The Babcock & Wilcox Company Explosive activated plug
US4347790A (en) * 1979-07-11 1982-09-07 Cockerill And Centre De Technologies Nouvelles Explosive plug for blocking tubes
US4446891A (en) * 1980-11-04 1984-05-08 Gebelius Sven Runo Vilhelm Method for repairing and/or reinforcing a pipe system, and a device for utilization of the method
US4425944A (en) 1980-11-17 1984-01-17 Kraftwerk Union Aktiengesellschaft Repair plug for heat exchanger tubes, especially for steam generators of pressurized-weather nuclear power plants
US4513786A (en) * 1983-04-14 1985-04-30 Combustion Engineering, Inc. Mechanical tube plub
US4587904A (en) * 1985-01-07 1986-05-13 Foster Wheeler Energy Corporation Debris free plug assembly for heat exchange tubes
US4685205A (en) * 1985-08-26 1987-08-11 Foster Wheeler Development Corporation Apparatus for forming an explosively expanded tube-tube sheet joint including a barrier tube
US4708280A (en) * 1985-10-23 1987-11-24 The United States Of America As Represented By The Administrator, National Aeronautics & Space Administration Tool and process for miniature explosive joining of tubes
US4751944A (en) * 1986-05-28 1988-06-21 Westinghouse Electric Corp. Duplex mechanical tube plug
US5038994A (en) * 1987-10-13 1991-08-13 The Babcock & Wilcox Company Apparatus for explosively welding a sleeve into a heat exchanger tube
US5022148A (en) * 1989-04-07 1991-06-11 The Babcock & Wilcox Company Method for explosively welding a sleeve into a heat exchanger tube
DE4113315A1 (de) * 1991-04-24 1992-10-29 Klaus Pomorin Rohrduebelpatrone
US5566444A (en) * 1994-03-14 1996-10-22 Korea Heavy Industries & Construction Company Tube-plugging assembly
US5479961A (en) * 1994-12-09 1996-01-02 Senior Engineering Company Method of plugging a heat exchanger tube and plug therefor
US7530485B1 (en) * 2006-02-07 2009-05-12 High Energy Metals, Inc. Method for explosive bonding of tubular metal liners
US11480021B2 (en) 2018-08-16 2022-10-25 James G. Rairigh Shaped charge assembly, explosive units, and methods for selectively expanding wall of a tubular
US11629568B2 (en) 2018-08-16 2023-04-18 James G. Rairigh Shaped charge assembly, explosive units, and methods for selectively expanding wall of a tubular
US12392211B2 (en) 2018-08-16 2025-08-19 W.T. Bell International, Inc. Explosive downhole tools having improved wellbore conveyance and debris properties, methods of using the explosive downhole tools in a wellbore, and explosive units for explosive column tools
US11473383B2 (en) * 2018-08-16 2022-10-18 James G. Rairigh Dual end firing explosive column tools and methods for selectively expanding a wall of a tubular
US11002097B2 (en) 2018-08-16 2021-05-11 James G. Rairigh Shaped charge assembly, explosive units, and methods for selectively expanding wall of a tubular
US11536104B2 (en) 2018-08-16 2022-12-27 James G. Rairigh Methods of pre-testing expansion charge for selectively expanding a wall of a tubular, and methods of selectively expanding walls of nested tubulars
US20230050277A1 (en) * 2018-08-16 2023-02-16 James G. Rairigh Dual End Firing Explosive Column Tools And Methods For Selectively Expanding A Wall Of A Tubular
US11015410B2 (en) * 2018-08-16 2021-05-25 James G. Rairigh Dual end firing explosive column tools and methods for selectively expanding a wall of a tubular
US11713637B2 (en) * 2018-08-16 2023-08-01 James G. Rairigh Dual end firing explosive column tools and methods for selectively expanding a wall of a tubular
US11781393B2 (en) 2018-08-16 2023-10-10 James G. Rairigh Explosive downhole tools having improved wellbore conveyance and debris properties, methods of using the explosive downhole tools in a wellbore, and explosive units for explosive column tools
US11781394B2 (en) 2018-08-16 2023-10-10 James G. Rairigh Shaped charge assembly, explosive units, and methods for selectively expanding wall of a tubular
US12123272B2 (en) 2018-08-16 2024-10-22 James G. Rairigh Methods of pre-testing expansion charge for selectively expanding a wall of a tubular, and methods of selectively expanding walls of nested tubulars
US12110751B2 (en) 2019-07-19 2024-10-08 DynaEnergetics Europe GmbH Ballistically actuated wellbore tool
US11834920B2 (en) * 2019-07-19 2023-12-05 DynaEnergetics Europe GmbH Ballistically actuated wellbore tool
US20220325590A1 (en) * 2019-07-19 2022-10-13 DynaEnergetics Europe GmbH Ballistically actuated wellbore tool

Also Published As

Publication number Publication date
FR2018520A1 (en)) 1970-05-29
GB1285911A (en) 1972-08-16

Similar Documents

Publication Publication Date Title
US3590877A (en) Explosive-activated plug
US3555656A (en) Method of explosively plugging a leaky metal tube in a heat exchanger tube bundle
US5372391A (en) Internal pipe attachment mechanism
USRE30802E (en) Method of securing a sleeve within a tube
US4069573A (en) Method of securing a sleeve within a tube
US3409969A (en) Method of explosively welding tubes to tube plates
US3503110A (en) Securing tubes into tube plates
US3562887A (en) Explosive expansion of liner sleeves
US4028789A (en) Method of installing a sleeve in one end of a tube
US4178966A (en) Tube plug
US3195928A (en) Coupling for pipes and the like
US3698067A (en) Method for mounting a pipe in a perforated plate
EP0079716B1 (en) Explosive tube expansion
US3724062A (en) Explosively welded plug for leaky tubes of a heat exchanger and method of using the same
US4494392A (en) Apparatus for forming an explosively expanded tube-tube sheet joint including a low energy transfer cord and booster
US4555053A (en) Method of joining together two pipe ends to form a pipe of metal
US4641775A (en) Means for splicing two pipes
US3774291A (en) Explosive bonding of tubes to fittings
US3672035A (en) Method of fabricating a tube sheet assembly
US4513903A (en) Method of repairing leaks in steam generator tubes
US4021907A (en) Method of sealing apertures in tube plates of heat exchangers using explosive plug
US3986735A (en) Methods for welding two metal pieces of tubing with their ends to each other and to pipe-lines consisting of pieces of tubing thus welded to each other
US4074630A (en) Methods and plugs to seal apertures in tube plates of heat exchangers provided with tube plates which are locally sealed with these methods and such plates
US4685205A (en) Apparatus for forming an explosively expanded tube-tube sheet joint including a barrier tube
US4587904A (en) Debris free plug assembly for heat exchange tubes