US20150345922A1 - Igniter for Downhole Use Having Flame Control - Google Patents
Igniter for Downhole Use Having Flame Control Download PDFInfo
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- US20150345922A1 US20150345922A1 US14/289,232 US201414289232A US2015345922A1 US 20150345922 A1 US20150345922 A1 US 20150345922A1 US 201414289232 A US201414289232 A US 201414289232A US 2015345922 A1 US2015345922 A1 US 2015345922A1
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- United States
- Prior art keywords
- explosive
- igniter
- housing
- resistive element
- combustible material
- 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.)
- Abandoned
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- 239000002360 explosive Substances 0.000 claims abstract description 74
- 239000000463 material Substances 0.000 claims abstract description 37
- 238000002485 combustion reaction Methods 0.000 claims abstract description 13
- 230000005611 electricity Effects 0.000 claims abstract description 10
- 230000000977 initiatory effect Effects 0.000 claims abstract description 9
- 239000003380 propellant Substances 0.000 claims description 26
- 238000005474 detonation Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 10
- 238000004891 communication Methods 0.000 claims description 8
- 239000004020 conductor Substances 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 230000008901 benefit Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
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- 238000007789 sealing Methods 0.000 description 3
- XTFIVUDBNACUBN-UHFFFAOYSA-N 1,3,5-trinitro-1,3,5-triazinane Chemical compound [O-][N+](=O)N1CN([N+]([O-])=O)CN([N+]([O-])=O)C1 XTFIVUDBNACUBN-UHFFFAOYSA-N 0.000 description 2
- YSIBQULRFXITSW-OWOJBTEDSA-N 1,3,5-trinitro-2-[(e)-2-(2,4,6-trinitrophenyl)ethenyl]benzene Chemical compound [O-][N+](=O)C1=CC([N+](=O)[O-])=CC([N+]([O-])=O)=C1\C=C\C1=C([N+]([O-])=O)C=C([N+]([O-])=O)C=C1[N+]([O-])=O YSIBQULRFXITSW-OWOJBTEDSA-N 0.000 description 2
- 239000000028 HMX Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- UZGLIIJVICEWHF-UHFFFAOYSA-N octogen Chemical compound [O-][N+](=O)N1CN([N+]([O-])=O)CN([N+]([O-])=O)CN([N+]([O-])=O)C1 UZGLIIJVICEWHF-UHFFFAOYSA-N 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000004200 deflagration Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
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- 230000002459 sustained effect Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
- F42C19/00—Details of fuzes
- F42C19/08—Primers; Detonators
- F42C19/12—Primers; Detonators electric
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/11—Perforators; Permeators
- E21B43/116—Gun or shaped-charge perforators
- E21B43/1185—Ignition systems
-
- 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
- F42B3/10—Initiators therefor
-
- 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
- F42B3/10—Initiators therefor
- F42B3/12—Bridge initiators
- F42B3/121—Initiators with incorporated integrated circuit
-
- 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
- F42B3/10—Initiators therefor
- F42B3/12—Bridge initiators
- F42B3/125—Bridge initiators characterised by the configuration of the bridge initiator case
Definitions
- the present disclosure relates in general to an igniter for igniting an explosive downhole, and which includes a propellant with a point of combustion adjacent the explosive.
- Perforating systems typically have shaped charges equipped with high explosive for generating a metal jet that pierces a wellbore wall to create perforations into the formation surrounding the wellbore.
- the shaped charges are disposed axially along the length of perforating guns that make up a perforating system.
- a detonation cord is usually placed adjacent each shaped charge, through which a detonation wave travels for initiating detonation of the high explosive.
- Packers and plugs are typically elastomeric bladder like elements that expand radially outward from a mandrel or downhole tool and into sealing contact with an inner surface of a wellbore wall. The sealing contact creates a pressure/flow barrier in the annulus between the tool and wellbore wall for isolating a designated portion of the wellbore.
- Some downhole packers or plugs are set with explosives that are included with the downhole tool.
- Igniters are usually included downhole for initiating combustion or detonation in a propellant, the detonating cord, or explosives.
- an igniter typically includes a cartridge, combustible material in the cartridge, and a resistive heating element inserted into combustible material. Electricity is supplied to the heating element via an electrode which ignites the combustible material. A flame exits the cartridge and is directed to an amount of combustible or explosive material adjacent the detonation cord or combustible material for ultimately detonating the shaped charges or setting the packer/plug.
- an igniter and a method, for initiating combustion and/or detonation of an explosive downhole.
- One example of the igniter includes a housing having an opening proximate the explosive, a combustible material in the housing, an igniter assembly in the opening and that is in thermal contact with the combustible material, so that when the igniter element is heated to a temperature that initiates combustion of the combustible material, a flame is generated in the housing which is directed to the explosive and that ignites the explosive.
- the igniter element can be made of an elongated resistive element which is made from a conductive material that is heated when current flows through the resistive element.
- the resistive element can be mounted on a printed circuit board.
- An electrode can be included in the housing for electrically coupling the resistive element with an electrical source.
- the explosive can be part of a perforating system or can be used for setting a packer in a wellbore.
- An alternative igniter for igniting an explosive downhole includes a housing having an opening, a propellant in the housing, an electrode inserted into the propellant and in electrical communication with a source of electricity, a resistive element in electrical communication with the electrode and in thermal contact with a surface of the propellant that is proximate the explosive, so that when electricity is supplied to the electrode from the source of electricity, current flows through the resistive element and heats the resistive element to a temperature that ignites the propellant, that in turn ignites the explosive.
- the resistive element may include an elongated electrically conductive member that is arranged in a helical configuration defined by a series of loops radially spaced away from one another.
- spacing between adjacent loops can be greater proximate an axis of the helical configuration.
- the resistive element may optionally be mounted on a printed circuit board that is set in the opening of the housing.
- the explosive can be used in a perforating system or for setting a packer.
- a method of detonating an explosive downhole includes providing an amount of combustible material in a housing adjacent the explosive, initiating combustion of the combustible material on an end of the combustible material that is proximate the explosive so that a flame front is created in the combustible material that travels away from the explosive that in turn generates a flame that is directed from the housing to the explosive and which ignites the explosive.
- the method may further include flowing current through a resistive element that is in thermal contact with the end of the combustible material proximate the explosive, wherein the resistive element becomes heated and initiates combustion of the combustible material.
- the explosive can be used for initiating detonation of shaped charges that create subterranean perforations, or for setting a packer in a wellbore.
- FIG. 1 is a side sectional view of an example of an igniter in accordance with the present invention.
- FIG. 2 is an axial sectional view of the igniter of FIG. 1 taken along lines 2 - 2 and in accordance with the present invention.
- FIG. 3 is a side sectional view of an example of operation of the igniter of FIG. 1 and in accordance with the present invention.
- FIG. 4 is a side sectional view of an example of a perforating system using the igniter of FIG. 1 and in accordance with the present invention.
- FIG. 5 is a side sectional view of an example of setting a packer using the igniter of FIG. 1 and in accordance with the present invention.
- FIG. 1 Shown in FIG. 1 is a side sectional view of an example of an igniter 10 which has an elongate housing 12 and a body 14 mounted on an upper end of housing 12 .
- a propellant 16 is shown disposed within housing 12 .
- propellant 16 include any energetic material that can be burned, combusted, or otherwise decomposed, and which generates energy when burned, combusted, or decomposed.
- electrode 18 is an electrically conducting element, an insulator 20 shown disposed between the electrode 18 and housing 14 to block electrical communication between electrode 18 and housing 14 .
- a lead 22 connects to an end of electrode 18 that protrudes outward from a side of the body 14 distal from housing 12 and which provides selective electrical communication between electrode 18 and an electrical source 23 .
- an electrical source include a battery, compositor, generator, and the like.
- igniter assembly 24 Shown set in housing 12 and on an end of propellant 16 distal from body 14 is an igniter assembly 24 for initiating combustion of propellant 16 .
- igniter assembly 24 is disposed in an opening 25 of the housing 12 that is distal from body 12 .
- Igniter assembly 24 includes a printed circuit board 26 and a resistive element 28 mounted on a surface of printed circuit board 26 facing propellant 16 .
- the igniter assembly 24 is shown between propellant 16 and an explosive 30 adjacent an end of housing 12 distal from body 14 .
- the explosive 30 includes an amount of explosive material which is packed within a housing 32 that is substantially coaxial with housing 12 . Examples of explosive material include any high explosive, such as octogen (HMX), cyclonite (RDX), hexanitrostilbene HNS, to name a few; any low explosive, and any other material that can detonate when initiated.
- HMX octogen
- RDX cyclonite
- hexanitrostilbene HNS to
- resistive element 28 is made from an elongate and electrically conductive resistive lead 34 .
- resistive lead 34 is arranged in a helical shape whose origin is proximate the axis A x of igniter 10 ( FIG. 1 ). From the origin, the resistive lead 34 spirals radially outward towards the outer periphery of printed circuit board 26 .
- electrode 18 rests on the resistive lead 34 so that the resistive element 28 and electrode 18 are in electrical communication.
- an optional resistive electrode 36 is provided on an end of resistive lead 34 proximate axis A x , electrode 36 is a planar element made from a conductive material. Electrode 36 defines a larger cross section than the lead 34 so that communication between electrode 18 and resistive element 28 is optimized. Alternatively, the end of resistive lead 34 opposite from resistive electrode 36 attaches to a ground G, which as shown in FIG. 1 may include housing 12 .
- igniter 10 is shown in side sectional view in FIG. 3 wherein the amount of electricity from electrical source 23 is supplied to electrode via lead 22 .
- the electricity in electrode 18 generates a flow of current through resistive lead 34 ( FIG. 2 ) which in turn heats resistive lead 34 to a designated temperature that is above the ignition temperature for the propellant 16 .
- resistive lead 34 As thermal energy from resistive lead 34 transfers to the propellant 16 , the resistive lead 34 and propellant are in thermal contact.
- the propellant 16 begins to combust and generates a flame front 38 . Arrows represent travel of the flame front 38 in a direction away from explosive 30 .
- igniter assembly 24 (shown in phantom view) basically disintegrates during generation of the flame discharge 40 .
- the electrical circuit made up of the resistive lead 34 and electrode 18 can be all within electrode 18 so that connection to housing 12 is unnecessary.
- FIG. 4 one example of using the igniter 10 in conjunction with a perforating operation is shown in a side sectional view.
- a perforating system 44 is shown deployed in a wellbore 45 where the igniter 10 is explosively coupled with an upper end of a detonation cord 46 that extends the length of the perforating system 44 .
- Shaped charges 48 are provided in system 44 that are detonated by a pressure wave within detonation cord 46 . Detonating the shaped charges 48 form metal jets that create perforations 50 radially outward into a formation 52 surrounding wellbore 45 .
- a wireline 54 provides the electrical signal to the igniter 10 from electrical source 23 ( FIG. 1 ).
- Wireline 52 is shown threaded through a wellhead assembly 56 that is mounted on the opening of wellbore 45 .
- a surface truck 58 which may contain the electrical source 23 , provides control of the perforating system 44 as well as a means for deploying the system 44 .
- igniter 10 is used in conjunction with a downhole tool 60 for setting a packer (or plug) 62 which projects radially outward from tool 60 and into sealing engagement with the walls of wellbore 45 .
- the tool 60 is deployed on wireline 54 that strings through wellhead assembly 56 from surface truck 58 .
- igniter provides the ignition source for igniting an explosive that is used in setting packer 62 .
- the explosive material making up the explosive 30 detonates after being initiated, wherein a definition of detonation describes a reaction that can propagate through the material being detonated at the sound speed of the material.
- detonation describes a reaction or decomposition of an explosive that, typically in response to a shock wave or heat, forms a high pressure/temperature wave.
- Example velocities of the high pressure/temperature wave can range from 1000 m/s to in excess of 9000 m/s.
- the explosive 30 can deflagrate, wherein a definition of deflagration describes a rapid auto-combustion of a material, such as an explosive.
- explosives that detonate are referred to as high explosives and explosives that deflagrate are referred to as low explosives.
- the explosive 30 includes a propellant that combusts (or is otherwise combustible), or is replaced with a propellant.
- combustion describes an exothermic reaction of a material that can produce an oxide.
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Abstract
An igniter initiates combustion in an amount of explosive that is downhole and adjacent the igniter. The igniter includes an amount of combustible material and a resistive igniter element disposed on a side of the combustible material that faces the amount of explosive. Applying a designated amount of electricity to the resistive igniter element generates sufficient heat to ignite the combustible material. Strategically initiating ignition adjacent the amount of explosive generates a flame front that travels away from the explosive, which in turn directs a flame against the explosive substantially the entire time the combustible material burns.
Description
- 1. Field of Invention
- The present disclosure relates in general to an igniter for igniting an explosive downhole, and which includes a propellant with a point of combustion adjacent the explosive.
- 2. Description of Prior Art
- Explosives are sometimes used during downhole operations for the exploration and production of subterranean hydrocarbons. Perforating systems typically have shaped charges equipped with high explosive for generating a metal jet that pierces a wellbore wall to create perforations into the formation surrounding the wellbore. The shaped charges are disposed axially along the length of perforating guns that make up a perforating system. A detonation cord is usually placed adjacent each shaped charge, through which a detonation wave travels for initiating detonation of the high explosive.
- Packers and plugs are typically elastomeric bladder like elements that expand radially outward from a mandrel or downhole tool and into sealing contact with an inner surface of a wellbore wall. The sealing contact creates a pressure/flow barrier in the annulus between the tool and wellbore wall for isolating a designated portion of the wellbore. Some downhole packers or plugs are set with explosives that are included with the downhole tool.
- Igniters are usually included downhole for initiating combustion or detonation in a propellant, the detonating cord, or explosives. Typically, an igniter includes a cartridge, combustible material in the cartridge, and a resistive heating element inserted into combustible material. Electricity is supplied to the heating element via an electrode which ignites the combustible material. A flame exits the cartridge and is directed to an amount of combustible or explosive material adjacent the detonation cord or combustible material for ultimately detonating the shaped charges or setting the packer/plug.
- Disclosed herein is an example of an igniter, and a method, for initiating combustion and/or detonation of an explosive downhole. One example of the igniter includes a housing having an opening proximate the explosive, a combustible material in the housing, an igniter assembly in the opening and that is in thermal contact with the combustible material, so that when the igniter element is heated to a temperature that initiates combustion of the combustible material, a flame is generated in the housing which is directed to the explosive and that ignites the explosive. The igniter element can be made of an elongated resistive element which is made from a conductive material that is heated when current flows through the resistive element. The resistive element can be mounted on a printed circuit board. An electrode can be included in the housing for electrically coupling the resistive element with an electrical source. The explosive can be part of a perforating system or can be used for setting a packer in a wellbore.
- An alternative igniter for igniting an explosive downhole includes a housing having an opening, a propellant in the housing, an electrode inserted into the propellant and in electrical communication with a source of electricity, a resistive element in electrical communication with the electrode and in thermal contact with a surface of the propellant that is proximate the explosive, so that when electricity is supplied to the electrode from the source of electricity, current flows through the resistive element and heats the resistive element to a temperature that ignites the propellant, that in turn ignites the explosive. The resistive element may include an elongated electrically conductive member that is arranged in a helical configuration defined by a series of loops radially spaced away from one another. In this example, spacing between adjacent loops can be greater proximate an axis of the helical configuration. The resistive element may optionally be mounted on a printed circuit board that is set in the opening of the housing. The explosive can be used in a perforating system or for setting a packer.
- A method of detonating an explosive downhole is disclosed that includes providing an amount of combustible material in a housing adjacent the explosive, initiating combustion of the combustible material on an end of the combustible material that is proximate the explosive so that a flame front is created in the combustible material that travels away from the explosive that in turn generates a flame that is directed from the housing to the explosive and which ignites the explosive. The method may further include flowing current through a resistive element that is in thermal contact with the end of the combustible material proximate the explosive, wherein the resistive element becomes heated and initiates combustion of the combustible material. The explosive can be used for initiating detonation of shaped charges that create subterranean perforations, or for setting a packer in a wellbore.
- Some of the features and benefits of the present invention having been stated, others will become apparent as the description proceeds when taken in conjunction with the accompanying drawings, in which:
-
FIG. 1 is a side sectional view of an example of an igniter in accordance with the present invention. -
FIG. 2 is an axial sectional view of the igniter ofFIG. 1 taken along lines 2-2 and in accordance with the present invention. -
FIG. 3 is a side sectional view of an example of operation of the igniter ofFIG. 1 and in accordance with the present invention. -
FIG. 4 is a side sectional view of an example of a perforating system using the igniter ofFIG. 1 and in accordance with the present invention. -
FIG. 5 is a side sectional view of an example of setting a packer using the igniter ofFIG. 1 and in accordance with the present invention. - While the invention will be described in connection with the preferred embodiments, it will be understood that it is not intended to limit the invention to that embodiment. On the contrary, it is intended to cover all alternatives, modifications, and equivalents, as may be included within the spirit and scope of the invention as defined by the appended claims.
- The method and system of the present disclosure will now be described more fully hereinafter with reference to the accompanying drawings in which embodiments are shown. The method and system of the present disclosure may be in many different forms and should not be construed as limited to the illustrated embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey its scope to those skilled in the art. Like numbers refer to like elements throughout. In an embodiment, usage of the term about includes +/−5% of the cited magnitude.
- It is to be further understood that the scope of the present disclosure is not limited to the exact details of construction, operation, exact materials, or embodiments shown and described, as modifications and equivalents will be apparent to one skilled in the art. In the drawings and specification, there have been disclosed illustrative embodiments and, although specific terms are employed, they are used in a generic and descriptive sense only and not for the purpose of limitation.
- Shown in
FIG. 1 is a side sectional view of an example of anigniter 10 which has anelongate housing 12 and abody 14 mounted on an upper end ofhousing 12. Apropellant 16 is shown disposed withinhousing 12. Examples ofpropellant 16 include any energetic material that can be burned, combusted, or otherwise decomposed, and which generates energy when burned, combusted, or decomposed. Anelongate electrode 18 shown inserted through thebody 14 and into thehousing 12 and is set withinpropellant 16. In the example ofFIG. 1 ,electrode 18 is an electrically conducting element, aninsulator 20 shown disposed between theelectrode 18 andhousing 14 to block electrical communication betweenelectrode 18 andhousing 14. Alead 22 connects to an end ofelectrode 18 that protrudes outward from a side of thebody 14 distal fromhousing 12 and which provides selective electrical communication betweenelectrode 18 and anelectrical source 23. Examples of an electrical source include a battery, compositor, generator, and the like. - Shown set in
housing 12 and on an end ofpropellant 16 distal frombody 14 is anigniter assembly 24 for initiating combustion ofpropellant 16. In the embodiment shown,igniter assembly 24 is disposed in an opening 25 of thehousing 12 that is distal frombody 12. Igniterassembly 24 includes a printedcircuit board 26 and aresistive element 28 mounted on a surface of printedcircuit board 26 facingpropellant 16. Further in the example ofFIG. 1 , theigniter assembly 24 is shown betweenpropellant 16 and an explosive 30 adjacent an end ofhousing 12 distal frombody 14. The explosive 30 includes an amount of explosive material which is packed within ahousing 32 that is substantially coaxial withhousing 12. Examples of explosive material include any high explosive, such as octogen (HMX), cyclonite (RDX), hexanitrostilbene HNS, to name a few; any low explosive, and any other material that can detonate when initiated. - Referring now to
FIG. 2 , an axial sectional view is provided that is taken along lines 2-2 ofFIG. 1 and which gives a plan view of printedcircuit board 26. As shown,resistive element 28 is made from an elongate and electrically conductiveresistive lead 34. In the example,resistive lead 34 is arranged in a helical shape whose origin is proximate the axis Ax of igniter 10 (FIG. 1 ). From the origin, theresistive lead 34 spirals radially outward towards the outer periphery of printedcircuit board 26. Also shown inFIG. 1 is thatelectrode 18 rests on theresistive lead 34 so that theresistive element 28 andelectrode 18 are in electrical communication. Referring back toFIG. 2 , an optionalresistive electrode 36 is provided on an end ofresistive lead 34 proximate axis Ax,electrode 36 is a planar element made from a conductive material.Electrode 36 defines a larger cross section than the lead 34 so that communication betweenelectrode 18 andresistive element 28 is optimized. Alternatively, the end ofresistive lead 34 opposite fromresistive electrode 36 attaches to a ground G, which as shown inFIG. 1 may includehousing 12. - One example of operation of
igniter 10 is shown in side sectional view inFIG. 3 wherein the amount of electricity fromelectrical source 23 is supplied to electrode vialead 22. The electricity inelectrode 18 generates a flow of current through resistive lead 34 (FIG. 2 ) which in turn heatsresistive lead 34 to a designated temperature that is above the ignition temperature for thepropellant 16. As thermal energy fromresistive lead 34 transfers to thepropellant 16, theresistive lead 34 and propellant are in thermal contact. By applying sufficient thermal energy topropellant 16, thepropellant 16 begins to combust and generates aflame front 38. Arrows represent travel of theflame front 38 in a direction away from explosive 30. As theflame front 38 moves away from theopening 25 of thehousing 12, aflame discharge 40 is created that is directed into the explosive 30. Theflame discharge 40 ignites explosive 30 to form an ignition/detonation front 42, and which is shown travelling through the explosive 30. One of the advantages of the present disclosure is that by ignitingpropellant 16 at an end, rather than in its middle, theflame discharge 40 is sustained and directed onto explosive 30 substantially during the entire time thepropellant 16 is being combusted. As such, greater likelihood exists that the ignition/detonation front 42 will be created within explosive 30 and carry out its intended operation. Further in the example ofFIG. 3 , igniter assembly 24 (shown in phantom view) basically disintegrates during generation of theflame discharge 40. Alternatively, the electrical circuit made up of theresistive lead 34 andelectrode 18 can be all withinelectrode 18 so that connection tohousing 12 is unnecessary. - Referring now to
FIG. 4 , one example of using theigniter 10 in conjunction with a perforating operation is shown in a side sectional view. In this example a perforatingsystem 44 is shown deployed in awellbore 45 where theigniter 10 is explosively coupled with an upper end of adetonation cord 46 that extends the length of the perforatingsystem 44.Shaped charges 48 are provided insystem 44 that are detonated by a pressure wave withindetonation cord 46. Detonating the shapedcharges 48 form metal jets that createperforations 50 radially outward into aformation 52 surroundingwellbore 45. Awireline 54 provides the electrical signal to theigniter 10 from electrical source 23 (FIG. 1 ).Wireline 52 is shown threaded through awellhead assembly 56 that is mounted on the opening ofwellbore 45. Asurface truck 58, which may contain theelectrical source 23, provides control of the perforatingsystem 44 as well as a means for deploying thesystem 44. - Alternatively,
igniter 10 is used in conjunction with adownhole tool 60 for setting a packer (or plug) 62 which projects radially outward fromtool 60 and into sealing engagement with the walls ofwellbore 45. Also in the example ofFIG. 5 , thetool 60 is deployed onwireline 54 that strings throughwellhead assembly 56 fromsurface truck 58. As is known, igniter provides the ignition source for igniting an explosive that is used in settingpacker 62. - In an example, the explosive material making up the explosive 30 detonates after being initiated, wherein a definition of detonation describes a reaction that can propagate through the material being detonated at the sound speed of the material. In a further example, detonation describes a reaction or decomposition of an explosive that, typically in response to a shock wave or heat, forms a high pressure/temperature wave. Example velocities of the high pressure/temperature wave can range from 1000 m/s to in excess of 9000 m/s. In another example, the explosive 30 can deflagrate, wherein a definition of deflagration describes a rapid auto-combustion of a material, such as an explosive. Generally, explosives that detonate are referred to as high explosives and explosives that deflagrate are referred to as low explosives. Alternate embodiments exist wherein the explosive 30 includes a propellant that combusts (or is otherwise combustible), or is replaced with a propellant. In an example, combustion describes an exothermic reaction of a material that can produce an oxide.
- The present invention described herein, therefore, is well adapted to carry out the objects and attain the ends and advantages mentioned, as well as others inherent therein. While a presently preferred embodiment of the invention has been given for purposes of disclosure, numerous changes exist in the details of procedures for accomplishing the desired results. These and other similar modifications will readily suggest themselves to those skilled in the art, and are intended to be encompassed within the spirit of the present invention disclosed herein and the scope of the appended claims.
Claims (15)
1. An igniter for igniting an explosive downhole comprising:
a housing having an opening proximate the explosive;
a pyrotechnic material in the housing;
an igniter assembly in the opening and that is in thermal contact with the pyrotechnic material, so that when the igniter element is heated to a temperature that initiates combustion of the combustible material, a flame is generated in the housing which is directed to the explosive and that ignites the explosive.
2. The igniter of claim 1 , wherein the igniter element comprises an elongated resistive element which is made from a conductive material that is heated when current flows through the resistive element.
3. The igniter of claim 2 , wherein the resistive element is mounted on a printed circuit board.
4. The igniter of claim 1 , further comprising an electrode in the housing for electrically coupling the igniter assembly with an electrical source.
5. The igniter of claim 1 , wherein the explosive is part of a perforating system.
6. The igniter of claim 1 , wherein the explosive is for setting a packer in a wellbore.
7. An igniter for igniting an explosive downhole comprising:
a housing having an opening;
a propellant in the housing;
an electrode inserted into the propellant and in electrical communication with a source of electricity;
a resistive element in electrical communication with the electrode and in thermal contact with a surface of the propellant that is proximate the explosive, so that when electricity is supplied to the electrode from the source of electricity, current flows through the resistive element and heats the resistive element to a temperature that ignites the propellant, that in turn ignites the explosive.
8. The igniter of claim 7 , wherein the resistive element comprises an elongated electrically conductive member that is arranged in a helical configuration defined by a series of loops radially spaced away from one another.
9. The igniter of claim 8 , wherein spacing between adjacent loops is greater proximate an axis of the helical configuration.
10. The igniter of claim 7 , wherein the resistive element is mounted on a printed circuit board that is set in the opening of the housing.
11. The igniter of claim 7 , wherein the explosive is selected from the list consisting of an explosive used in a perforating system and an explosive used for setting a packer.
12. A method of detonating an explosive downhole comprising:
providing an amount of combustible material in a housing adjacent the explosive;
initiating combustion of the combustible material on an end of the combustible material that is proximate the explosive so that a flame front is created in the combustible material that travels away from the explosive that in turn generates a flame that is directed from the housing to the explosive and which ignites the explosive.
13. The method of claim 12 , further comprising flowing current through a resistive element that is in thermal contact with the end of the combustible material proximate the explosive, wherein the resistive element becomes heated and initiates combustion of the combustible material.
14. The method of claim 12 , wherein the explosive is used for initiating detonation of shaped charges that create subterranean perforations.
15. The method of claim 12 , wherein the explosive is used for setting a packer in a wellbore.
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US14/289,232 US20150345922A1 (en) | 2014-05-28 | 2014-05-28 | Igniter for Downhole Use Having Flame Control |
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US14/289,232 US20150345922A1 (en) | 2014-05-28 | 2014-05-28 | Igniter for Downhole Use Having Flame Control |
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US14/289,232 Abandoned US20150345922A1 (en) | 2014-05-28 | 2014-05-28 | Igniter for Downhole Use Having Flame Control |
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Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106837282A (en) * | 2016-12-13 | 2017-06-13 | 中国石油天然气股份有限公司 | Igniter, igniter and ignition method |
WO2018034673A1 (en) * | 2016-08-19 | 2018-02-22 | Halliburton Energy Services, Inc. | System and method of delivering stimulation treatment by means of gas generation |
WO2018132666A1 (en) * | 2017-01-13 | 2018-07-19 | Baker Hughes, A Ge Company, Llc | Actuation system and method |
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US11542792B2 (en) | 2013-07-18 | 2023-01-03 | DynaEnergetics Europe GmbH | Tandem seal adapter for use with a wellbore tool, and wellbore tool string including a tandem seal adapter |
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US11898425B2 (en) | 2018-08-10 | 2024-02-13 | Gr Energy Services Management, Lp | Downhole perforating tool with integrated detonation assembly and method of using same |
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Citations (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1845687A (en) * | 1931-06-09 | 1932-02-16 | Tese Stephen | Blasting cartridge |
US2511669A (en) * | 1945-10-20 | 1950-06-13 | Du Pont | Ignition composition |
US2798921A (en) * | 1955-12-29 | 1957-07-09 | John W Haas | Thermally controlled safety switch |
US2802422A (en) * | 1953-11-09 | 1957-08-13 | Hercules Powder Co Ltd | Static resistance electric initiator |
US2960008A (en) * | 1957-02-25 | 1960-11-15 | Otis J Mccullough | Perforating gun |
US3186341A (en) * | 1961-10-06 | 1965-06-01 | Bjorklund John Olof | Igniter with separated layers of explosive |
US3314479A (en) * | 1965-01-25 | 1967-04-18 | Otis J Mccullough | Bridging plug |
US3550885A (en) * | 1968-08-27 | 1970-12-29 | Us Army | Retardation device for air dropped stores |
US3570403A (en) * | 1968-11-06 | 1971-03-16 | Ensign Bickford Co | Pyrotechnic igniter |
US4352397A (en) * | 1980-10-03 | 1982-10-05 | Jet Research Center, Inc. | Methods, apparatus and pyrotechnic compositions for severing conduits |
US4651254A (en) * | 1982-08-24 | 1987-03-17 | Dynamit Nobel Aktiengesellschaft | Inductive igniters with secondary coil |
USH464H (en) * | 1987-04-09 | 1988-05-03 | The United States Of America As Represented By The Secretary Of The Navy | Metal hydride explosive system |
US4798244A (en) * | 1987-07-16 | 1989-01-17 | Trost Stephen A | Tool and process for stimulating a subterranean formation |
US5347929A (en) * | 1993-09-01 | 1994-09-20 | Schlumberger Technology Corporation | Firing system for a perforating gun including an exploding foil initiator and an outer housing for conducting wireline current and EFI current |
US5396951A (en) * | 1992-10-16 | 1995-03-14 | Baker Hughes Incorporated | Non-explosive power charge ignition |
US6055213A (en) * | 1990-07-09 | 2000-04-25 | Baker Hughes Incorporated | Subsurface well apparatus |
US6289813B1 (en) * | 1999-02-18 | 2001-09-18 | Livbag Snc | Electropyrotechnic igniter with enhanced ignition reliability |
US6490976B1 (en) * | 2001-08-22 | 2002-12-10 | Breed Automotive Technology, Inc. | Smart igniter communications repeater |
US6536524B1 (en) * | 1999-04-27 | 2003-03-25 | Marathon Oil Company | Method and system for performing a casing conveyed perforating process and other operations in wells |
US6752083B1 (en) * | 1998-09-24 | 2004-06-22 | Schlumberger Technology Corporation | Detonators for use with explosive devices |
US6962112B1 (en) * | 1999-07-30 | 2005-11-08 | Ruag Ammotec Gmbh | Entirely combustible inductive primer |
US7051655B1 (en) * | 2001-10-26 | 2006-05-30 | Institut Franco-Allemand De Recherches De Saint-Louis | Low-energy optical detonator |
US20090044716A1 (en) * | 2007-05-14 | 2009-02-19 | Aerojet-General Corporation, A Corporation Of The State Of Ohio | Slow cook off rocket igniter |
US20090158953A1 (en) * | 2005-11-09 | 2009-06-25 | Autoliv Development Ab | Glass-Metal Feedthrough, a Method of Fabricating It, and an Electro-Pyrotechnic Initiator Including It |
US7652868B2 (en) * | 2004-09-21 | 2010-01-26 | Autoliv Development Ab | Electropyrotechnic initiator |
US20110259230A1 (en) * | 2008-05-16 | 2011-10-27 | Sawka Wayne N | Electrode ignition and control of electrically ignitable materials |
US20150285019A1 (en) * | 2014-04-04 | 2015-10-08 | Owen Oil Tools Lp | Devices and related methods for actuating wellbore tools with a pressurized gas |
-
2014
- 2014-05-28 US US14/289,232 patent/US20150345922A1/en not_active Abandoned
Patent Citations (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1845687A (en) * | 1931-06-09 | 1932-02-16 | Tese Stephen | Blasting cartridge |
US2511669A (en) * | 1945-10-20 | 1950-06-13 | Du Pont | Ignition composition |
US2802422A (en) * | 1953-11-09 | 1957-08-13 | Hercules Powder Co Ltd | Static resistance electric initiator |
US2798921A (en) * | 1955-12-29 | 1957-07-09 | John W Haas | Thermally controlled safety switch |
US2960008A (en) * | 1957-02-25 | 1960-11-15 | Otis J Mccullough | Perforating gun |
US3186341A (en) * | 1961-10-06 | 1965-06-01 | Bjorklund John Olof | Igniter with separated layers of explosive |
US3314479A (en) * | 1965-01-25 | 1967-04-18 | Otis J Mccullough | Bridging plug |
US3550885A (en) * | 1968-08-27 | 1970-12-29 | Us Army | Retardation device for air dropped stores |
US3570403A (en) * | 1968-11-06 | 1971-03-16 | Ensign Bickford Co | Pyrotechnic igniter |
US4352397A (en) * | 1980-10-03 | 1982-10-05 | Jet Research Center, Inc. | Methods, apparatus and pyrotechnic compositions for severing conduits |
US4651254A (en) * | 1982-08-24 | 1987-03-17 | Dynamit Nobel Aktiengesellschaft | Inductive igniters with secondary coil |
USH464H (en) * | 1987-04-09 | 1988-05-03 | The United States Of America As Represented By The Secretary Of The Navy | Metal hydride explosive system |
US4798244A (en) * | 1987-07-16 | 1989-01-17 | Trost Stephen A | Tool and process for stimulating a subterranean formation |
US6055213A (en) * | 1990-07-09 | 2000-04-25 | Baker Hughes Incorporated | Subsurface well apparatus |
US5396951A (en) * | 1992-10-16 | 1995-03-14 | Baker Hughes Incorporated | Non-explosive power charge ignition |
US5347929A (en) * | 1993-09-01 | 1994-09-20 | Schlumberger Technology Corporation | Firing system for a perforating gun including an exploding foil initiator and an outer housing for conducting wireline current and EFI current |
US6752083B1 (en) * | 1998-09-24 | 2004-06-22 | Schlumberger Technology Corporation | Detonators for use with explosive devices |
US6289813B1 (en) * | 1999-02-18 | 2001-09-18 | Livbag Snc | Electropyrotechnic igniter with enhanced ignition reliability |
US6536524B1 (en) * | 1999-04-27 | 2003-03-25 | Marathon Oil Company | Method and system for performing a casing conveyed perforating process and other operations in wells |
US6962112B1 (en) * | 1999-07-30 | 2005-11-08 | Ruag Ammotec Gmbh | Entirely combustible inductive primer |
US6490976B1 (en) * | 2001-08-22 | 2002-12-10 | Breed Automotive Technology, Inc. | Smart igniter communications repeater |
US7051655B1 (en) * | 2001-10-26 | 2006-05-30 | Institut Franco-Allemand De Recherches De Saint-Louis | Low-energy optical detonator |
US7652868B2 (en) * | 2004-09-21 | 2010-01-26 | Autoliv Development Ab | Electropyrotechnic initiator |
US20090158953A1 (en) * | 2005-11-09 | 2009-06-25 | Autoliv Development Ab | Glass-Metal Feedthrough, a Method of Fabricating It, and an Electro-Pyrotechnic Initiator Including It |
US20090044716A1 (en) * | 2007-05-14 | 2009-02-19 | Aerojet-General Corporation, A Corporation Of The State Of Ohio | Slow cook off rocket igniter |
US7762195B2 (en) * | 2007-05-14 | 2010-07-27 | Aerojet - General Corporation | Slow cook off rocket igniter |
US20110259230A1 (en) * | 2008-05-16 | 2011-10-27 | Sawka Wayne N | Electrode ignition and control of electrically ignitable materials |
US8857338B2 (en) * | 2008-05-16 | 2014-10-14 | Digital Solid State Propulsion Llc | Electrode ignition and control of electrically ignitable materials |
US20150285019A1 (en) * | 2014-04-04 | 2015-10-08 | Owen Oil Tools Lp | Devices and related methods for actuating wellbore tools with a pressurized gas |
Cited By (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11788389B2 (en) | 2013-07-18 | 2023-10-17 | DynaEnergetics Europe GmbH | Perforating gun assembly having seal element of tandem seal adapter and coupling of housing intersecting with a common plane perpendicular to longitudinal axis |
US11661823B2 (en) | 2013-07-18 | 2023-05-30 | DynaEnergetics Europe GmbH | Perforating gun assembly and wellbore tool string with tandem seal adapter |
US11542792B2 (en) | 2013-07-18 | 2023-01-03 | DynaEnergetics Europe GmbH | Tandem seal adapter for use with a wellbore tool, and wellbore tool string including a tandem seal adapter |
US11053783B2 (en) * | 2016-05-04 | 2021-07-06 | Hunting Titan, Inc. | Directly initiated addressable power charge |
US11719078B2 (en) | 2016-05-04 | 2023-08-08 | Hunting Titan, Inc. | Directly initiated addressable power charge |
US11448045B2 (en) | 2016-05-04 | 2022-09-20 | Hunting Titan, Inc. | Directly initiated addressable power charge |
WO2018034673A1 (en) * | 2016-08-19 | 2018-02-22 | Halliburton Energy Services, Inc. | System and method of delivering stimulation treatment by means of gas generation |
US10858922B2 (en) * | 2016-08-19 | 2020-12-08 | Halliburton Energy Services, Inc. | System and method of delivering stimulation treatment by means of gas generation |
CN106837282A (en) * | 2016-12-13 | 2017-06-13 | 中国石油天然气股份有限公司 | Igniter, igniter and ignition method |
WO2018132666A1 (en) * | 2017-01-13 | 2018-07-19 | Baker Hughes, A Ge Company, Llc | Actuation system and method |
US10472939B2 (en) | 2017-08-09 | 2019-11-12 | Geodynamics, Inc. | Setting tool igniter system and method |
US10920544B2 (en) | 2017-08-09 | 2021-02-16 | Geodynamics, Inc. | Setting tool igniter system and method |
US10914147B2 (en) | 2017-08-09 | 2021-02-09 | Geodynamics, Inc. | Setting tool igniter system and method |
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US11898425B2 (en) | 2018-08-10 | 2024-02-13 | Gr Energy Services Management, Lp | Downhole perforating tool with integrated detonation assembly and method of using same |
US11994008B2 (en) | 2018-08-10 | 2024-05-28 | Gr Energy Services Management, Lp | Loaded perforating gun with plunging charge assembly and method of using same |
CN110726490A (en) * | 2019-11-08 | 2020-01-24 | 西安交通大学 | Micro-scale initiating explosive device ignition temperature measuring device |
WO2021116336A1 (en) * | 2019-12-10 | 2021-06-17 | DynaEnergetics Europe GmbH | Initiator head with circuit board |
US11339614B2 (en) | 2020-03-31 | 2022-05-24 | DynaEnergetics Europe GmbH | Alignment sub and orienting sub adapter |
US11988049B2 (en) | 2020-03-31 | 2024-05-21 | DynaEnergetics Europe GmbH | Alignment sub and perforating gun assembly with alignment sub |
US11713625B2 (en) | 2021-03-03 | 2023-08-01 | DynaEnergetics Europe GmbH | Bulkhead |
WO2023154306A1 (en) * | 2022-02-08 | 2023-08-17 | Schlumberger Technology Corporation | Compact igniter |
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