US20090151589A1 - Explosive shock dissipater - Google Patents
Explosive shock dissipater Download PDFInfo
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- US20090151589A1 US20090151589A1 US11/957,757 US95775707A US2009151589A1 US 20090151589 A1 US20090151589 A1 US 20090151589A1 US 95775707 A US95775707 A US 95775707A US 2009151589 A1 US2009151589 A1 US 2009151589A1
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- Prior art keywords
- layer
- acoustic impedance
- shock
- dissipater
- tool string
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D3/00—Particular applications of blasting techniques
- F42D3/04—Particular applications of blasting techniques for rock blasting
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/07—Telescoping joints for varying drill string lengths; Shock absorbers
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B43/119—Details, e.g. for locating perforating place or direction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B39/00—Packaging or storage of ammunition or explosive charges; Safety features thereof; Cartridge belts or bags
- F42B39/24—Shock-absorbing arrangements in packages, e.g. for shock waves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D5/00—Safety arrangements
- F42D5/04—Rendering explosive charges harmless, e.g. destroying ammunition; Rendering detonation of explosive charges harmless
- F42D5/045—Detonation-wave absorbing or damping means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/40—Seismology; Seismic or acoustic prospecting or detecting specially adapted for well-logging
- G01V1/52—Structural details
Definitions
- the present invention relates in general to explosive devices and more particular to devices and systems for shielding devices from the stress energy propagated from explosions by dissipating the propagated stress energy.
- These explosive devices may be lowered and positioned at the desired location in various manners.
- the explosive charge may be positioned by measuring the length of the conveyance, carrying the explosive charge, that is run into the well until it is believed that the explosive charges are properly positioned.
- shock waves can exert massive forces upon the electronic instrumentation and other downhole equipment, often resulting in damage to or failure of the equipment. It may be desired to shield any number of various devices, or packages, from the shock waves propagated from the explosive device. Packages to be shield from the explosive shock waves may include, without limitation to, sensors, gauges, logging instruments, telemetry devices, additional explosives, and valves.
- an apparatus for dampening a stress wave includes a first interface formed between a first layer of material and a second layer of material, the first and second layers of material having dissimilar acoustic impedances.
- a wellbore tool string includes an explosive device, a package, and a shock dissipater positioned between the explosive device and the package, the shock dissipater includes a first interface formed between a first layer of material and a second layer of material, the first and second layers of material having dissimilar acoustic impedances. Additional layer of alternating acoustic impedance material can be add to further reduce the shock.
- a method of dampening stress waves propagated from the detonation of an explosive device in a wellbore to protect a device positioned downhole includes the steps of positioning a shock dissipater between an explosive device and a package; detonating the explosive device propagating a stress wave toward the shock dissipater and the package; and reflecting a portion of the stress wave in the shock dissipater back to the originating device and propagating a smaller portion of the shock wave through the device.
- FIG. 1 is a wellbore schematic illustrating an example of a tool string incorporating a shock dissipating system of the present invention
- FIG. 2 is partial cross-sectional view of an example of a shock dissipater incorporated into a sub assembly
- FIG. 3 is an illustration of a shock dissipater in isolation.
- the terms “up” and “down”; “upper” and “lower”; and other like terms indicating relative positions to a given point or element are utilized to more clearly describe some elements of the embodiments of the invention. Commonly, these terms relate to a reference point at the surface from which drilling operations are initiated as being the top point and the total depth of the well being the lowest point.
- FIG. 1 is a schematic illustration of an example of a system for dissipating the shock from an explosion, generally denoted by the numeral 10 .
- System 10 includes a tool string, generally denoted by the numeral 12 , suspended by a conveyance 14 in a well or wellbore 16 .
- Conveyance 14 may include without limitation wireline, slickline, coiled tubing, jointed tubing and the like for carrying and suspending tool string 12 in wellbore 16 . It is recognized that conveyance 14 may be included in whole or in part with tool string 12 .
- tool string 12 includes an explosive device 18 , a shock dissipater 20 , and a package 22 .
- Explosive device 18 is illustrated as a perforating gun; however explosive device 18 may be without limitation a coring device, a cutting tool or other device that includes an explosive charge or other element that produces a shock wave upon activation.
- Package 22 may be any device, tool or system that it is desired to be protected from the shock waves propagated from the detonation or activation of explosive device 18 .
- package 22 is often referred to generally as an electronics package.
- package 22 may include electronics and instrumentation for sensing pressure or temperature.
- Package 22 may be an electronics package such as, without limitation, logging instruments, telemetry equipment, and positioning instruments.
- package 22 may include any other device that may need to be shielded from the shock waves of the explosive device, including without limitation, valves and explosive devices.
- Shock dissipater 20 is provided for dampening shock energy generated by downhole explosive device 18 , thus providing a means for running packages 22 in tool string 12 .
- dissipation device 20 is illustrated as a sub assembly that is positioned within tool string 12 between perforating gun 18 and package 22 .
- dissipating device 20 may be formed for example as part of package 22 or within explosive device 18 .
- Dissipater 20 of the present example is illustrated incorporated into an assembly that is adapted for threadably connecting within tool string.
- Dissipater 20 includes a body or housing 24 , which in the illustrated example is a tubular collar having a longitudinal axis 26 .
- housing 24 forms an axial bore 28 that, may or may not, extend the full length of housing 24 , as will be further explained below.
- Dissipater 20 which will be described in more detail below with reference to FIG. 3 , includes two dissimilar members 30 a and 30 b that form an interface 32 therebetween. Dissipater 20 is connected within housing 24 so that interface 32 is positioned approximately perpendicular to longitudinal axis 26 .
- a conduit 34 may be formed through shock dissipater 20 . In this example, conduit 34 is oriented substantially parallel to longitudinal axis 26 and bore 28 .
- Conduit 34 may be provided, for example, for passing wiring (not shown) to perforating gun 18 ( FIG. 1 ) or other electronics, or for passing a drop bar for detonating explosive device 18 .
- dissipater 20 is constructed of three members or layers denoted by the numeral 30 a , 30 b , and 30 c .
- the Figures only illustrated examples having either two layers 30 , one interface 32 , or three layers 30 , two interfaces 32 , more than three layers 30 may be utilized.
- Each layer 30 is constructed of a material having acoustic impedance (I), which is defined generally as the acoustic sound speed (c) in the material multiplied by the density ( ⁇ ) of the material of construction.
- I acoustic impedance
- Layers 30 are positioned in contact with one another to form interfaces 32 .
- Adjacent layers 30 have dissimilar acoustic impedance, and are referred to herein as dissimilar layer or members.
- layer 30 a has an impedance I a
- layer 30 b has an impedance of I b
- 30 c has an impedance I c , which is different from and therefore dissimilar to its adjacent layer 30 b .
- Layer 30 c has an impedance that is dissimilar to layer 30 b , and that may be the same as or different from the impedance of layer 30 a.
- shock or stress waves propagate through the first dissipating layer 30 a encountered.
- Stress waves 36 include a tensile portion and a compressive portion.
- interface 32 ab a portion of the stress energy is transmitted into the adjacent layer 30 b , illustrated by the arrow 36 t , and a portion is reflected, illustrated by the arrow 36 r .
- stress energy 36 t encounters interface 36 bc a portion is transmitted and a portion is reflected. Any of the interfaces could be angled so as to deflect shock or stress waves coming from any potential direction as necessary.
- a portion of the stress wave is transmitted and a portion of the stress wave is reflected.
- the impedance of the first layer encountered is less than the impedance of the second layer encountered (I a ⁇ I b ) a tensile stress wave is reflected.
- the impedance of the first layer encountered is greater than the impedance of the second layer encountered (I a >I b ) a compressive stress wave is reflected.
- KR coefficient of reflection
- K T coefficient of transmission
- K T 2 ⁇ I 2 I 2 + I 1
- K R I 2 - I 1 I 2 + I 1
- dissipater 20 may be constructed in various forms and positioned in different positions to protect a package 22 as desired or needed.
- package 22 may be an electronics package 22 that is positioned proximate to explosive device 18 and therefore need a substantial amount of protection from the shock wave encountered upon detonation.
- Shock dissipater 20 may be positioned between package 22 and explosive device 18 for example in a sub assembly, or positioned within the housing incorporating package 22 . Due to the high degree of shock, or stress, wave dissipation required dissipater 20 may be formed with more than one interface 32 .
- a few examples of materials that may be used for layers 30 include elastomeric materials, rubber, plastic, various grades of metals, steel, iron, encapsulated water, cement and air. If more than two layers 30 are utilized, the materials of construction may be alternated, for example rubber-steel-rubber, or may include more than two materials of construction, for example rubber-steel-cement-steel. It is further noted that the same type of material may be utilized in adjacent layers, provided that the materials have dissimilar impedances. Also, the same material may be used in non-adjacent layers along the lines noted above.
Abstract
A method of dampening stress waves propagated from the detonation of an explosive device in a wellbore to protect a device positioned downhole including the steps of positioning a shock dissipater between an explosive device and a package; detonating the explosive device propagating a stress wave toward the shock dissipater and the package; and reflecting a portion of the stress wave in the shock dissipater. The shock dissipater may have one or more interface formed between materials of dissimilar acoustic impedances. The shock dissipater may reflect a compressive portion of the stress wave at one interface and a tensile portion of the stress wave at another interface.
Description
- The present invention relates in general to explosive devices and more particular to devices and systems for shielding devices from the stress energy propagated from explosions by dissipating the propagated stress energy.
- It is often necessary to use explosives during wellbore operations, in particular during the drilling of a well. For example, it may be desired to obtain a sidewall core before the well is completed. To obtain a core, an explosive charge may be detonated to propel a coring device into the wall to obtain a sample. It is also commonly required to provide communication between the wellbore and the surrounding formation after the well is completed with a casing. To provide the necessary communication, perforations are created through the casing, cement and into the formation. The perforations are commonly created with shaped explosive charges.
- These explosive devices may be lowered and positioned at the desired location in various manners. In the simplest of operations the explosive charge may be positioned by measuring the length of the conveyance, carrying the explosive charge, that is run into the well until it is believed that the explosive charges are properly positioned.
- In many instances it is desired or necessary to include electronic instrumentation or other mechanical packages in close proximity to the explosive charges or other working packages that may be sensitive to the explosive shock waves. For example, in high-angle wells and horizontal wells it may be necessary to include locating electronics with the conveyance and explosive device for proper positioning. Electronic equipment and the like are also desirable for locating thin zones and positioning of the explosive device. Further, in deep wells the stretch of conveyance (wireline or pipe) alone may necessitate the use of locating equipment for positioning. Additionally, it is often desired to perform multiple operations in a well without running into and then out of the well between operations, in these cases it is desirable to include electronic equipment in the tool string.
- The firing of the explosive charges produces a large shock wave that propagates through the wellbore and perforating assembly. These shock waves can exert massive forces upon the electronic instrumentation and other downhole equipment, often resulting in damage to or failure of the equipment. It may be desired to shield any number of various devices, or packages, from the shock waves propagated from the explosive device. Packages to be shield from the explosive shock waves may include, without limitation to, sensors, gauges, logging instruments, telemetry devices, additional explosives, and valves.
- Examples of apparatus, devices, systems and method for dissipating a stress wave to shield a package such as, without limitation, an electronic system or working member from the stress wave. In one example, an apparatus for dampening a stress wave includes a first interface formed between a first layer of material and a second layer of material, the first and second layers of material having dissimilar acoustic impedances.
- In another example, a wellbore tool string includes an explosive device, a package, and a shock dissipater positioned between the explosive device and the package, the shock dissipater includes a first interface formed between a first layer of material and a second layer of material, the first and second layers of material having dissimilar acoustic impedances. Additional layer of alternating acoustic impedance material can be add to further reduce the shock.
- In another example, a method of dampening stress waves propagated from the detonation of an explosive device in a wellbore to protect a device positioned downhole includes the steps of positioning a shock dissipater between an explosive device and a package; detonating the explosive device propagating a stress wave toward the shock dissipater and the package; and reflecting a portion of the stress wave in the shock dissipater back to the originating device and propagating a smaller portion of the shock wave through the device.
- The foregoing has outlined some of the features and technical advantages of the present invention in order that the detailed description of the invention that follows may be better understood. Additional features and advantages of the invention will be described hereinafter which form the subject of the claims of the invention.
- The foregoing and other features and aspects of the present invention will be best understood with reference to the following detailed description of a specific embodiment of the invention, when read in conjunction with the accompanying drawings, wherein:
-
FIG. 1 is a wellbore schematic illustrating an example of a tool string incorporating a shock dissipating system of the present invention; -
FIG. 2 is partial cross-sectional view of an example of a shock dissipater incorporated into a sub assembly; and -
FIG. 3 is an illustration of a shock dissipater in isolation. - Refer now to the drawings wherein depicted elements are not necessarily shown to scale and wherein like or similar elements are designated by the same reference numeral through the several views.
- As used herein, the terms “up” and “down”; “upper” and “lower”; and other like terms indicating relative positions to a given point or element are utilized to more clearly describe some elements of the embodiments of the invention. Commonly, these terms relate to a reference point at the surface from which drilling operations are initiated as being the top point and the total depth of the well being the lowest point.
-
FIG. 1 is a schematic illustration of an example of a system for dissipating the shock from an explosion, generally denoted by thenumeral 10.System 10 includes a tool string, generally denoted by thenumeral 12, suspended by aconveyance 14 in a well orwellbore 16.Conveyance 14 may include without limitation wireline, slickline, coiled tubing, jointed tubing and the like for carrying and suspendingtool string 12 inwellbore 16. It is recognized thatconveyance 14 may be included in whole or in part withtool string 12. - In the illustrated example,
tool string 12 includes anexplosive device 18, ashock dissipater 20, and a package 22.Explosive device 18 is illustrated as a perforating gun; howeverexplosive device 18 may be without limitation a coring device, a cutting tool or other device that includes an explosive charge or other element that produces a shock wave upon activation. - Package 22 may be any device, tool or system that it is desired to be protected from the shock waves propagated from the detonation or activation of
explosive device 18. For purposes of description herein, package 22 is often referred to generally as an electronics package. For example, package 22 may include electronics and instrumentation for sensing pressure or temperature. Package 22 may be an electronics package such as, without limitation, logging instruments, telemetry equipment, and positioning instruments. However, it is recognized that package 22 may include any other device that may need to be shielded from the shock waves of the explosive device, including without limitation, valves and explosive devices. -
Shock dissipater 20 is provided for dampening shock energy generated by downholeexplosive device 18, thus providing a means for running packages 22 intool string 12. InFIG. 1 ,dissipation device 20 is illustrated as a sub assembly that is positioned withintool string 12 between perforatinggun 18 and package 22. However, in otherexamples dissipating device 20 may be formed for example as part of package 22 or withinexplosive device 18. - Refer now to
FIG. 2 wherein an example ofshock dissipater 20 is illustrated.Dissipater 20 of the present example is illustrated incorporated into an assembly that is adapted for threadably connecting within tool string.Dissipater 20 includes a body orhousing 24, which in the illustrated example is a tubular collar having alongitudinal axis 26. In this example,housing 24 forms anaxial bore 28 that, may or may not, extend the full length ofhousing 24, as will be further explained below. -
Dissipater 20, which will be described in more detail below with reference toFIG. 3 , includes twodissimilar members interface 32 therebetween.Dissipater 20 is connected withinhousing 24 so thatinterface 32 is positioned approximately perpendicular tolongitudinal axis 26. Aconduit 34, indicated by the dashed lines, may be formed throughshock dissipater 20. In this example,conduit 34 is oriented substantially parallel tolongitudinal axis 26 and bore 28.Conduit 34 may be provided, for example, for passing wiring (not shown) to perforating gun 18 (FIG. 1 ) or other electronics, or for passing a drop bar for detonatingexplosive device 18. - Referring now to
FIG. 3 , wherein an example ofshock dissipater 20 is shown in isolation. In the illustrated example,dissipater 20 is constructed of three members or layers denoted by thenumeral interface 32, or three layers 30, twointerfaces 32, more than three layers 30 may be utilized. Each layer 30 is constructed of a material having acoustic impedance (I), which is defined generally as the acoustic sound speed (c) in the material multiplied by the density (ρ) of the material of construction. - Layers 30 are positioned in contact with one another to form
interfaces 32. Adjacent layers 30 have dissimilar acoustic impedance, and are referred to herein as dissimilar layer or members. Thus,layer 30 a has an impedance Ia andlayer 30 b has an impedance of Ib. Similarly, 30 c has an impedance Ic, which is different from and therefore dissimilar to itsadjacent layer 30 b.Layer 30 c has an impedance that is dissimilar to layer 30 b, and that may be the same as or different from the impedance oflayer 30 a. - Upon detonation of
explosive device 18, shock or stress waves, illustrated byarrows 36, propagate through the first dissipatinglayer 30 a encountered. Stress waves 36 include a tensile portion and a compressive portion. When shock waves 36encounter interface 32 ab, a portion of the stress energy is transmitted into theadjacent layer 30 b, illustrated by thearrow 36 t, and a portion is reflected, illustrated by thearrow 36 r. Whenstress energy 36 t encounters interface 36 bc a portion is transmitted and a portion is reflected. Any of the interfaces could be angled so as to deflect shock or stress waves coming from any potential direction as necessary. - At each
interface 32, provided the adjacent acoustic impedances are different, a portion of the stress wave is transmitted and a portion of the stress wave is reflected. When the impedance of the first layer encountered is less than the impedance of the second layer encountered (Ia<Ib) a tensile stress wave is reflected. When the impedance of the first layer encountered is greater than the impedance of the second layer encountered (Ia>Ib) a compressive stress wave is reflected. - A coefficient of reflection, KR, and a coefficient of transmission, KT, is provided below wherein I1 is the impedance of the first layer encountered by the stress wave and I2 is the impedance of the layer across the interface from the first layer.
-
- With reference to
FIGS. 1-3 ,dissipater 20 may be constructed in various forms and positioned in different positions to protect a package 22 as desired or needed. For example, package 22 may be an electronics package 22 that is positioned proximate toexplosive device 18 and therefore need a substantial amount of protection from the shock wave encountered upon detonation.Shock dissipater 20 may be positioned between package 22 andexplosive device 18 for example in a sub assembly, or positioned within the housing incorporating package 22. Due to the high degree of shock, or stress, wave dissipation requireddissipater 20 may be formed with more than oneinterface 32. A few examples of materials that may be used for layers 30 include elastomeric materials, rubber, plastic, various grades of metals, steel, iron, encapsulated water, cement and air. If more than two layers 30 are utilized, the materials of construction may be alternated, for example rubber-steel-rubber, or may include more than two materials of construction, for example rubber-steel-cement-steel. It is further noted that the same type of material may be utilized in adjacent layers, provided that the materials have dissimilar impedances. Also, the same material may be used in non-adjacent layers along the lines noted above. - From the foregoing detailed description of specific embodiments of the invention, it should be apparent that a system for dissipating impulse stress energy propagated from an explosive device to shield a device from the stress energy that is novel has been disclosed. Although specific embodiments of the invention have been disclosed herein in some detail, this has been done solely for the purposes of describing various features and aspects of the invention, and is not intended to be limiting with respect to the scope of the invention. It is contemplated that various substitutions, alterations, and/or modifications, including but not limited to those implementation variations which may have been suggested herein, may be made to the disclosed embodiments without departing from the spirit and scope of the invention as defined by the appended claims which follow.
Claims (21)
1. An apparatus for dampening a stress wave, the apparatus comprising a first interface formed between a first layer of material and a second layer of material, the first and second layers of material having dissimilar acoustic impedances.
2. The apparatus of the claim 1 , further including a third layer of material positioned in contact with the second layer of material to form a second interface, the second and third layers of material having dissimilar acoustic impedances.
3. The apparatus of claim 2 , wherein the acoustic impedance of the first layer of material and the acoustic impedance of the third layer of material are dissimilar.
4. The apparatus of claim 2 , wherein the acoustic impedance of the first layer is less than the acoustic impedance of the second impedance layer and the second acoustic impedance is greater than the acoustic impedance of the third layer of material.
5. The apparatus of claim 4 , wherein the acoustic impedance of the first layer of material and the acoustic impedance of the third layer of material are dissimilar.
6. The apparatus of claim 2 , wherein the acoustic impedance of the first layer is greater than the acoustic impedance of the second impedance and the second acoustic impedance is greater than the acoustic impedance of the third layer of material.
7. A wellbore tool string, the tool string comprising:
an explosive device,
a package; and
a shock dissipater positioned between the explosive device and the package, the shock dissipater including a first interface formed between a first layer of material and a second layer of material, the first and second layers of material having dissimilar acoustic impedances.
8. The tool string of claim 7 , wherein the shock dissipater is a sub assembly.
9. The tool string of claim 7 , further including a housing having an axial bore and a longitudinal axis, wherein the shock dissipater is positioned across the axial bore such that the first interface is oriented substantially perpendicular to the longitudinal axis.
10. The tool string of claim 7 , further including a conduit formed through the shock dissipater, the conduit being oriented substantially parallel to the longitudinal axis of the housing.
11. The tool string of claim 7 , further including a third layer of material positioned in contact with the second layer of material to form a second interface, the second and third layers of material having dissimilar acoustic impedances.
12. The tool string of claim 11 , wherein one of the layers of material is a metal, another one of the layers of material is an elastomeric material, and another one of the layers of material is foam.
13. The tool string of claim 11 , wherein the acoustic impedance of the first layer of material and the acoustic impedance of the third layer of material are dissimilar.
14. The tool string of claim 11 , wherein the acoustic impedance of the first layer is less than the acoustic impedance of the second impedance and the second acoustic impedance is greater than the acoustic impedance of the third layer of material.
15. The tool string of claim 14 , wherein the acoustic impedance of the first layer of material and the acoustic impedance of the third layer of material are dissimilar.
16. The tool string of claim 11 , wherein the acoustic impedance of the first layer is greater than the acoustic impedance of the second impedance and the second acoustic impedance is greater than the acoustic impedance of the third layer of material.
17. The tool string of claim 11 , further including a housing having an axial bore and a longitudinal axis, wherein the shock dissipater is positioned across the axial bore such that the first interface is oriented substantially perpendicular to the longitudinal axis.
18. The tool string of claim 17 , further including a conduit formed through the shock dissipater, the conduit being oriented substantially parallel to the longitudinal axis of the housing.
19. A method of dampening stress waves propagated from the detonation of an explosive device in a wellbore to protect a device positioned downhole, the method comprising the steps of:
positioning a shock dissipater between an explosive device and a package;
detonating the explosive device propagating a stress wave toward the shock dissipater and the package; and
reflecting a portion of the stress wave in the shock dissipater.
20. The method of claim 19 , wherein the step of reflecting includes:
reflecting a tensile wave portion of the stress wave at one interface between layers of material; and
reflecting a compressive wave portion of the stress wave at another interface between layers of material.
21. The apparatus of claim 2 , wherein the acoustic impedance of the first layer of material and the acoustic impedance of the third layer of material are similar.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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US11/957,757 US20090151589A1 (en) | 2007-12-17 | 2007-12-17 | Explosive shock dissipater |
CNA200810095954XA CN101463720A (en) | 2007-12-17 | 2008-04-30 | Explosive shock dissipater |
GB0819488A GB2455854B (en) | 2007-12-17 | 2008-10-24 | Explosive shock dissipater |
NO20085210A NO20085210L (en) | 2007-12-17 | 2008-12-15 | Explosives shock absorber |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/957,757 US20090151589A1 (en) | 2007-12-17 | 2007-12-17 | Explosive shock dissipater |
Publications (1)
Publication Number | Publication Date |
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US20090151589A1 true US20090151589A1 (en) | 2009-06-18 |
Family
ID=40133734
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US11/957,757 Abandoned US20090151589A1 (en) | 2007-12-17 | 2007-12-17 | Explosive shock dissipater |
Country Status (4)
Country | Link |
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US (1) | US20090151589A1 (en) |
CN (1) | CN101463720A (en) |
GB (1) | GB2455854B (en) |
NO (1) | NO20085210L (en) |
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WO2013032456A1 (en) * | 2011-08-31 | 2013-03-07 | Halliburton Energy Services, Inc. | Perforating gun with internal shock mitigation |
US8393393B2 (en) | 2010-12-17 | 2013-03-12 | Halliburton Energy Services, Inc. | Coupler compliance tuning for mitigating shock produced by well perforating |
US8397800B2 (en) | 2010-12-17 | 2013-03-19 | Halliburton Energy Services, Inc. | Perforating string with longitudinal shock de-coupler |
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US20140260591A1 (en) * | 2012-12-01 | 2014-09-18 | Halliburton Energy Services, Inc. | Protection of Electronic Devices Used with Perforating Guns |
US8875796B2 (en) | 2011-03-22 | 2014-11-04 | Halliburton Energy Services, Inc. | Well tool assemblies with quick connectors and shock mitigating capabilities |
US8899320B2 (en) | 2010-12-17 | 2014-12-02 | Halliburton Energy Services, Inc. | Well perforating with determination of well characteristics |
US8978749B2 (en) | 2012-09-19 | 2015-03-17 | Halliburton Energy Services, Inc. | Perforation gun string energy propagation management with tuned mass damper |
US8985200B2 (en) | 2010-12-17 | 2015-03-24 | Halliburton Energy Services, Inc. | Sensing shock during well perforating |
US9091152B2 (en) | 2011-08-31 | 2015-07-28 | Halliburton Energy Services, Inc. | Perforating gun with internal shock mitigation |
CN105352696A (en) * | 2015-11-17 | 2016-02-24 | 北京理工大学 | Downhole string dynamic response test system and test method under explosive blast |
US20160084048A1 (en) * | 2013-05-03 | 2016-03-24 | Schlumberger Technology Corporation | Cohesively Enhanced Modular Perforating Gun |
US9297228B2 (en) | 2012-04-03 | 2016-03-29 | Halliburton Energy Services, Inc. | Shock attenuator for gun system |
US9598940B2 (en) | 2012-09-19 | 2017-03-21 | Halliburton Energy Services, Inc. | Perforation gun string energy propagation management system and methods |
US10077641B2 (en) | 2012-12-04 | 2018-09-18 | Schlumberger Technology Corporation | Perforating gun with integrated initiator |
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US10927649B2 (en) * | 2017-04-19 | 2021-02-23 | Halliburton Energy Service, Inc. | System and method to control wellbore pressure during perforating |
WO2022015921A1 (en) * | 2020-07-15 | 2022-01-20 | Baker Hughes Oilfield Operations Llc | Adjustable strength shock absorber system for downhole ballistics |
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US11834934B2 (en) | 2019-05-16 | 2023-12-05 | Schlumberger Technology Corporation | Modular perforation tool |
USD1016958S1 (en) | 2020-09-11 | 2024-03-05 | Schlumberger Technology Corporation | Shaped charge frame |
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CN110986711B (en) * | 2019-12-17 | 2021-01-01 | 武汉大学 | Weak shock blasting charging device and using method thereof |
CN114483032B (en) * | 2021-12-17 | 2023-03-21 | 西安交通大学 | Shock wave reduction method for push rod |
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Citations (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2169671A (en) * | 1936-06-22 | 1939-08-15 | Vera E Yarbrough | Casing perforator |
US3709294A (en) * | 1971-04-16 | 1973-01-09 | Camco Inc | Downhole power dissipator |
US4850438A (en) * | 1984-04-27 | 1989-07-25 | Halliburton Company | Modular perforating gun |
US4895218A (en) * | 1988-10-24 | 1990-01-23 | Exxon Production Research Company | Multishot downhole explosive device as a seismic source |
US5022485A (en) * | 1989-04-13 | 1991-06-11 | Mitchell Donald K | Method and apparatus for detonation of distributed charges |
US5157223A (en) * | 1985-10-21 | 1992-10-20 | The United States Of America As Represented By The Secretary Of The Air Force | Explosive attenuating structure |
US5188191A (en) * | 1991-12-09 | 1993-02-23 | Halliburton Logging Services, Inc. | Shock isolation sub for use with downhole explosive actuated tools |
US5278359A (en) * | 1992-04-30 | 1994-01-11 | Exxon Production Research Company | Simple multishot downhole explosive tool |
US6123171A (en) * | 1999-02-24 | 2000-09-26 | Mcnett; Christopher P. | Acoustic panels having plural damping layers |
US6298924B1 (en) * | 1998-07-22 | 2001-10-09 | Schlumberger Technology Corporation | Safety method and apparatus for a perforating gun |
US6386109B1 (en) * | 1999-07-22 | 2002-05-14 | Schlumberger Technology Corp. | Shock barriers for explosives |
US6412614B1 (en) * | 1999-09-20 | 2002-07-02 | Core Laboratories Canada Ltd. | Downhole shock absorber |
US6419044B1 (en) * | 1999-04-20 | 2002-07-16 | Schlumberger Technology Corporation | Energy source for use in seismic acquisitions |
US6648097B2 (en) * | 2001-07-11 | 2003-11-18 | Schlumberger Technology Corporation | Seismic methods having extended energy release |
US6761230B2 (en) * | 2002-09-06 | 2004-07-13 | Schlumberger Technology Corporation | Downhole drilling apparatus and method for using same |
US6957702B2 (en) * | 2003-04-16 | 2005-10-25 | Halliburton Energy Services, Inc. | Cement compositions with improved mechanical properties and methods of cementing in a subterranean formation |
US7121340B2 (en) * | 2004-04-23 | 2006-10-17 | Schlumberger Technology Corporation | Method and apparatus for reducing pressure in a perforating gun |
US7182138B2 (en) * | 2000-03-02 | 2007-02-27 | Schlumberger Technology Corporation | Reservoir communication by creating a local underbalance and using treatment fluid |
US7237486B2 (en) * | 2004-04-08 | 2007-07-03 | Baker Hughes Incorporated | Low debris perforating gun system for oriented perforating |
US7284612B2 (en) * | 2000-03-02 | 2007-10-23 | Schlumberger Technology Corporation | Controlling transient pressure conditions in a wellbore |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4989493A (en) * | 1985-10-21 | 1991-02-05 | The United States Of America As Represented By The Secretary Of The Air Force | Explosive attenuating structure for use inside missiles and the like |
US5117911A (en) * | 1991-04-16 | 1992-06-02 | Jet Research Center, Inc. | Shock attenuating apparatus and method |
NO963009L (en) * | 1995-07-27 | 1997-01-28 | Western Atlas Int Inc | Shaped charge |
US6564899B1 (en) * | 1998-09-24 | 2003-05-20 | Dresser Industries, Inc. | Method and apparatus for absorbing acoustic energy |
-
2007
- 2007-12-17 US US11/957,757 patent/US20090151589A1/en not_active Abandoned
-
2008
- 2008-04-30 CN CNA200810095954XA patent/CN101463720A/en active Pending
- 2008-10-24 GB GB0819488A patent/GB2455854B/en not_active Expired - Fee Related
- 2008-12-15 NO NO20085210A patent/NO20085210L/en not_active Application Discontinuation
Patent Citations (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2169671A (en) * | 1936-06-22 | 1939-08-15 | Vera E Yarbrough | Casing perforator |
US3709294A (en) * | 1971-04-16 | 1973-01-09 | Camco Inc | Downhole power dissipator |
US4850438A (en) * | 1984-04-27 | 1989-07-25 | Halliburton Company | Modular perforating gun |
US5157223A (en) * | 1985-10-21 | 1992-10-20 | The United States Of America As Represented By The Secretary Of The Air Force | Explosive attenuating structure |
US4895218A (en) * | 1988-10-24 | 1990-01-23 | Exxon Production Research Company | Multishot downhole explosive device as a seismic source |
US5022485A (en) * | 1989-04-13 | 1991-06-11 | Mitchell Donald K | Method and apparatus for detonation of distributed charges |
US5188191A (en) * | 1991-12-09 | 1993-02-23 | Halliburton Logging Services, Inc. | Shock isolation sub for use with downhole explosive actuated tools |
US5278359A (en) * | 1992-04-30 | 1994-01-11 | Exxon Production Research Company | Simple multishot downhole explosive tool |
US6298924B1 (en) * | 1998-07-22 | 2001-10-09 | Schlumberger Technology Corporation | Safety method and apparatus for a perforating gun |
US6123171A (en) * | 1999-02-24 | 2000-09-26 | Mcnett; Christopher P. | Acoustic panels having plural damping layers |
US6419044B1 (en) * | 1999-04-20 | 2002-07-16 | Schlumberger Technology Corporation | Energy source for use in seismic acquisitions |
US6386109B1 (en) * | 1999-07-22 | 2002-05-14 | Schlumberger Technology Corp. | Shock barriers for explosives |
US6554081B1 (en) * | 1999-07-22 | 2003-04-29 | Schlumberger Technology Corporation | Components and methods for use with explosives |
US6412614B1 (en) * | 1999-09-20 | 2002-07-02 | Core Laboratories Canada Ltd. | Downhole shock absorber |
US7182138B2 (en) * | 2000-03-02 | 2007-02-27 | Schlumberger Technology Corporation | Reservoir communication by creating a local underbalance and using treatment fluid |
US7284612B2 (en) * | 2000-03-02 | 2007-10-23 | Schlumberger Technology Corporation | Controlling transient pressure conditions in a wellbore |
US6648097B2 (en) * | 2001-07-11 | 2003-11-18 | Schlumberger Technology Corporation | Seismic methods having extended energy release |
US6761230B2 (en) * | 2002-09-06 | 2004-07-13 | Schlumberger Technology Corporation | Downhole drilling apparatus and method for using same |
US6957702B2 (en) * | 2003-04-16 | 2005-10-25 | Halliburton Energy Services, Inc. | Cement compositions with improved mechanical properties and methods of cementing in a subterranean formation |
US7237486B2 (en) * | 2004-04-08 | 2007-07-03 | Baker Hughes Incorporated | Low debris perforating gun system for oriented perforating |
US7121340B2 (en) * | 2004-04-23 | 2006-10-17 | Schlumberger Technology Corporation | Method and apparatus for reducing pressure in a perforating gun |
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US8901228B2 (en) | 2009-12-28 | 2014-12-02 | Nissin Kogyo Co., Ltd. | Carbon fiber composite material, method of producing the same, insulating article, electronic part, and logging tool |
US8393393B2 (en) | 2010-12-17 | 2013-03-12 | Halliburton Energy Services, Inc. | Coupler compliance tuning for mitigating shock produced by well perforating |
US8397800B2 (en) | 2010-12-17 | 2013-03-19 | Halliburton Energy Services, Inc. | Perforating string with longitudinal shock de-coupler |
US8397814B2 (en) | 2010-12-17 | 2013-03-19 | Halliburton Energy Serivces, Inc. | Perforating string with bending shock de-coupler |
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US8490686B2 (en) | 2010-12-17 | 2013-07-23 | Halliburton Energy Services, Inc. | Coupler compliance tuning for mitigating shock produced by well perforating |
US8985200B2 (en) | 2010-12-17 | 2015-03-24 | Halliburton Energy Services, Inc. | Sensing shock during well perforating |
US8899320B2 (en) | 2010-12-17 | 2014-12-02 | Halliburton Energy Services, Inc. | Well perforating with determination of well characteristics |
US8875796B2 (en) | 2011-03-22 | 2014-11-04 | Halliburton Energy Services, Inc. | Well tool assemblies with quick connectors and shock mitigating capabilities |
US9206675B2 (en) | 2011-03-22 | 2015-12-08 | Halliburton Energy Services, Inc | Well tool assemblies with quick connectors and shock mitigating capabilities |
US8714252B2 (en) | 2011-04-29 | 2014-05-06 | Halliburton Energy Services, Inc. | Shock load mitigation in a downhole perforation tool assembly |
US8881816B2 (en) | 2011-04-29 | 2014-11-11 | Halliburton Energy Services, Inc. | Shock load mitigation in a downhole perforation tool assembly |
US8714251B2 (en) | 2011-04-29 | 2014-05-06 | Halliburton Energy Services, Inc. | Shock load mitigation in a downhole perforation tool assembly |
US20140290352A1 (en) * | 2011-06-16 | 2014-10-02 | Halliburton Energy Services, Inc. | Protection of Electronic Devices Used with Perforating Guns |
US9091152B2 (en) | 2011-08-31 | 2015-07-28 | Halliburton Energy Services, Inc. | Perforating gun with internal shock mitigation |
WO2013032456A1 (en) * | 2011-08-31 | 2013-03-07 | Halliburton Energy Services, Inc. | Perforating gun with internal shock mitigation |
US9297228B2 (en) | 2012-04-03 | 2016-03-29 | Halliburton Energy Services, Inc. | Shock attenuator for gun system |
US8978749B2 (en) | 2012-09-19 | 2015-03-17 | Halliburton Energy Services, Inc. | Perforation gun string energy propagation management with tuned mass damper |
US9598940B2 (en) | 2012-09-19 | 2017-03-21 | Halliburton Energy Services, Inc. | Perforation gun string energy propagation management system and methods |
US8978817B2 (en) | 2012-12-01 | 2015-03-17 | Halliburton Energy Services, Inc. | Protection of electronic devices used with perforating guns |
US20140260591A1 (en) * | 2012-12-01 | 2014-09-18 | Halliburton Energy Services, Inc. | Protection of Electronic Devices Used with Perforating Guns |
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US10077641B2 (en) | 2012-12-04 | 2018-09-18 | Schlumberger Technology Corporation | Perforating gun with integrated initiator |
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US11136867B2 (en) * | 2017-11-15 | 2021-10-05 | Halliburton Energy Services, Inc. | Perforating gun |
FR3073551A1 (en) * | 2017-11-15 | 2019-05-17 | Halliburton Energy Services, Inc. | PERFORATOR GUN |
US11377935B2 (en) | 2018-03-26 | 2022-07-05 | Schlumberger Technology Corporation | Universal initiator and packaging |
US11566500B2 (en) | 2019-02-08 | 2023-01-31 | Schlumberger Technology Corporation | Integrated loading tube |
US11834934B2 (en) | 2019-05-16 | 2023-12-05 | Schlumberger Technology Corporation | Modular perforation tool |
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Also Published As
Publication number | Publication date |
---|---|
GB2455854B (en) | 2010-03-31 |
GB2455854A (en) | 2009-06-24 |
GB0819488D0 (en) | 2008-12-03 |
NO20085210L (en) | 2009-06-18 |
CN101463720A (en) | 2009-06-24 |
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