US20130206385A1 - Multi-element hybrid perforating apparatus - Google Patents

Multi-element hybrid perforating apparatus Download PDF

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Publication number
US20130206385A1
US20130206385A1 US13/397,077 US201213397077A US2013206385A1 US 20130206385 A1 US20130206385 A1 US 20130206385A1 US 201213397077 A US201213397077 A US 201213397077A US 2013206385 A1 US2013206385 A1 US 2013206385A1
Authority
US
United States
Prior art keywords
sleeve
carrier
explosive devices
explosive
perforating apparatus
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
Application number
US13/397,077
Other languages
English (en)
Inventor
Guofu Feng
Changshuan Wang
Oliver Han
Yuanwen Yao
Senyuan LI
Baoxing Wang
Feng Wang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
North Schlumberger Oilfield Tech Xi'an Co Ltd
Original Assignee
North Schlumberger Oilfield Tech Xi'an Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by North Schlumberger Oilfield Tech Xi'an Co Ltd filed Critical North Schlumberger Oilfield Tech Xi'an Co Ltd
Priority to US13/397,077 priority Critical patent/US20130206385A1/en
Assigned to NORTH SCHLUMBERGER OILFIELD TECHNOLOGIES (XI'AN) CO., LTD. reassignment NORTH SCHLUMBERGER OILFIELD TECHNOLOGIES (XI'AN) CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WANG, Changshuan, FENG, Guofu, HAN, Oliver, LI, Senyuan, WANG, Baoxing, WANG, FENG, YAO, Yuanwen
Priority to CN201380019544.6A priority patent/CN104220694A/zh
Priority to RU2014136989A priority patent/RU2014136989A/ru
Priority to PCT/US2013/026243 priority patent/WO2013123268A1/en
Priority to BR112014020176A priority patent/BR112014020176A8/pt
Publication of US20130206385A1 publication Critical patent/US20130206385A1/en
Abandoned legal-status Critical Current

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Classifications

    • 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
    • E21B43/117—Shaped-charge perforators
    • 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
    • E21B43/119—Details, e.g. for locating perforating place or direction

Definitions

  • one or more zones in the well are perforated to allow for fluid communication between a wellbore and the reservoir.
  • Perforation is accomplished by lowering a perforating gun to a target interval within the well. Activation of the perforating gun creates openings in any surrounding casing or liner and extends perforation tunnels into the surrounding subterranean formation.
  • a perforating apparatus includes a carrier, explosive devices mounted to the carrier, energetic cells arranged among the explosive devices, and a sleeve to receive at least a portion of the carrier, where the sleeve is formed of an energetic material.
  • FIG. 1 illustrates an example tool string having a perforating gun configured according to some implementations
  • FIG. 2 is a partial sectional view of a perforating gun according to some implementations
  • FIGS. 3 and 4 illustrate modular energetic sleeves according to some implementations
  • FIGS. 5 and 6 illustrate components of a perforator charge according to further implementations.
  • FIG. 7 is a flow diagram of a process of forming a perforating gun according to some implementations.
  • a perforating apparatus can be deployed into the well.
  • An example of a perforating apparatus is a perforating gun that carries explosive devices that when detonated produces explosive jets that extend the perforations into a surrounding formation (in any intermediate casing or liner).
  • Such explosive devices are referred to as perforator charges, and in some cases, are referred to as shaped charges.
  • crushed zone refers to a damaged zone that surrounds a perforation tunnel, where the perforating action has altered the formation structure and its permeability. Also, the perforating action can cause debris to fill perforation tunnels. The crushed zone damage can result in reduced ability to perform production or injection.
  • a perforating apparatus such as a perforating gun
  • various components formed of an energetic material that are able to produce a relatively high energy wave (or waves), such as in the form of a relatively high pressure pulse or pressure pulses.
  • the high energy wave can result in creation of fractures in the subterranean formation, enlargement of a perforation tunnel, and/or removal or reduction of crushed zone damage in the formation.
  • the components formed of the energetic material is activated in response to detonation of the explosive devices (such as perforator charges) in the perforating apparatus.
  • the deployment of multiple components of an energetic material allows for creation of multiple energy waves (such as multiple pressure pulses).
  • the multiple components formed of an energetic material can include some combination of the following: a charge formed of an energetic material provided in a section of a perforating apparatus that is connected (above or below) to the section of the perforating apparatus that includes the explosive devices; energetic cells (formed of an energetic material) arranged among the explosive devices; a modular energetic sleeve formed around an outer surface of a carrier mounted above the explosive devices, where the carrier can include a loading tube or other type of carrier; a sleeve formed of an energetic material that is provided around an outer housing of the perforating apparatus; and a member formed of an energetic material formed as part of an individual explosive device, such as a perforator charge.
  • Examples of an energetic material can include any one or more of the following: a propellant, a high explosive, a gun powder, a combustible metallic powder, thermite, or any combination thereof.
  • FIG. 1 illustrates a tool string 100 that is lowered into a wellbore 102 .
  • the wellbore 102 can be lined with casing or liner 104 .
  • the tool string 100 is lowered on a deployment structure 106 , which can be a wireline, tubing (e.g. coiled tubing or other tubing), a pipe, and so forth.
  • the tool string 100 has a perforating gun 108 , which includes a carrier structure 110 to which perforator charges 112 are attached.
  • the carrier structure 110 can be a loading tube defining an inner chamber (which can be sealed from outside well fluids) in which the perforator charges 112 are mounted.
  • the carrier structure 110 can be a strip onto which the perforator charges 112 are mounted.
  • the carrier structure 110 can have other forms.
  • the perforator charges 112 are ballistically connected to a detonating cord 114 . Initiation of the detonating cord 114 causes detonation of the perforator charges 112 .
  • the detonating cord 114 can be connected to a firing head 116 , which can be activated from an earth surface 118 , such as by use of equipment at the earth surface 118 .
  • the activation of the firing head 116 can be in response to electrical commands, acoustic commands, pressure commands, optical commands, and so forth, that can be sent from the equipment at the earth surface 118 to the firing head 116 . In other examples, the activation of the firing head 116 can be performed mechanically.
  • FIG. 2 is a partial sectional view of an example perforating gun 108 that has multiple sections 202 , 204 , and 206 . Portions of the perforating gun 108 are cut away to illustrate inner components.
  • the upper gun section 202 and intermediate gun section 204 are interconnected by an adapter 208
  • the intermediate gun section 204 and lower gun section 206 are interconnected by an adapter 210 .
  • the intermediate gun section 204 includes the loading tube 110 , perforator charges 112 , and detonating cord 114 discussed above in connection with FIG. 1 .
  • the upper gun section 202 includes a propellant charge 212 , which is formed of a propellant (or other energetic material).
  • the propellant charge 212 is contained inside an outer housing 228 of the upper gun section 202
  • the lower gun section 206 includes a propellant charge 214 , which includes a propellant or other energetic material.
  • the propellant charge 214 is contained inside an outer housing 230 of the lower gun section 206 .
  • the upper gun section 202 has a gun head 216 to allow the perforating gun 108 to connect to another portion of the tool string 100 shown in FIG. 1 .
  • the lower gun section 206 has a bottom nose piece 218 .
  • the intermediate gun section 204 also includes various components formed of a propellant or other energetic material.
  • propellant cells 220 are arranged among the perforator charges 112 .
  • Each propellant cell 220 is formed of a propellant or other energetic material.
  • a modular propellant sleeve 222 is provided around an outer surface of the loading tube 110 .
  • a sleeve provided around the loading tube (or other carrier) can refer to a sleeve that either partially or fully surrounds the outer surface of the loading tube or other carrier.
  • the loading tube 110 is positioned inside an outer housing 224 of the intermediate gun section 204 .
  • another outer propellant sleeve 226 can be provided around the outer surface of the outer gun housing 224 of the intermediate gun section 204 .
  • the outer propellant sleeve 226 can also include a propellant or other energetic material.
  • a sealed central passageway 234 (sealed from fluids outside the central passageway 234 ) is provided in the upper gun section 202 through the propellant charge 212 .
  • the detonating cord 114 for activating the perforator charges 112 can be passed through the central passageway 234 in the upper gun section 202 .
  • the detonating cord 114 extends from the gun head 216 through the central passageway 234 to the intermediate gun section 204 .
  • the detonating cord 114 further extends from the intermediate gun section 204 to the lower gun section 206 .
  • the lower gun section 206 includes a central passageway 236 that extends through the perforator charge 214 .
  • the detonating cord 114 extends inside the central passageway 236 .
  • an activation signal (e.g. electrical signal, acoustic signal, optical signal, hydraulic signal, mechanical stimulus, etc.) can be provided to the gun head 216 .
  • the gun head 216 can include a firing mechanism that can initiate the detonating cord 114 . Initiation of the detonating cord 114 causes an initiation wave to travel down the detonating cord 114 .
  • Initiation of the portion of the detonating cord 114 in the central passageway 234 in the upper gun section 202 causes activation of the propellant charge 212 .
  • a pressure wave caused by the activation of the propellant charge 212 travels through openings 238 in the outer housing 228 of the upper gun section 202 .
  • the initiation wave continues to travel along the detonating cord 114 until it reaches the intermediate gun section 204 .
  • Initiation of the portion of the detonating cord 114 in the intermediate gun section 204 causes detonation of the perforator charges 112 , which in turn causes activation of the propellant cells 220 , the modular propellant sleeve 222 , and the outer propellant sleeve 226 .
  • Activation of the propellant cells 220 , the modular propellant sleeve 222 , and the outer propellant sleeve 226 causes resultant pressure waves to be generated, which can be propagated through openings in the outer housing 224 of the intermediate gun section 204 .
  • Such openings in the outer housing 224 are produced by perforating jets generated by the detonated perforator charges 112 .
  • the initiation wave continues to travel down the detonating cord 114 to the lower gun section 206 .
  • Initiation of the detonating cord 114 in the central passageway 236 of the lower gun section 206 causes activation of the propellant charge 214 , which causes the resultant pressure wave to travel through openings 240 in the outer housing 230 of the lower gun section 206 .
  • the perforating gun 108 is shown in FIG. 2 , note that in other examples, some of the elements depicted in FIG. 2 can be omitted.
  • the outer propellant charge 226 can be omitted in some implementations.
  • the propellant cells 220 can be omitted in some implementations.
  • the propellant charge 212 and/or propellant charge 214 in the upper and lower gun sections 202 and 206 , respectively, can be omitted.
  • different configurations of the perforating gun 108 can include different combinations of the following propellant elements: propellant charge 212 , propellant charge 214 , propellant cells 220 , modular propellant sleeve 222 , and outer propellant sleeve 226 .
  • the perforator charges 112 can be incorporated with a propellant or other energetic material.
  • propellant or other energetic material incorporated into a perforator charge 112 can be used in addition to or in place of any or some combination of the foregoing propellant elements.
  • FIG. 3 shows an example configuration of the modular propellant sleeve 222 .
  • the modular propellant sleeve 222 includes a tubular structure 300 that has openings 302 that correspond to positions of the perforator charges 112 in the loading tube 110 of FIG. 2 . These openings 302 of the propellant sleeve 222 are positioned such that the perforating jet of each perforator charge 112 extends through the corresponding opening 302 of the propellant sleeve 222 .
  • a tubular structure can refer to a structure as generally cylindrical, or that can have different cross-sectional shapes, such as a rectangular shape, or some other shape.
  • the tubular structure 300 of the propellant sleeve 222 also includes grooves 304 that interconnect adjacent openings 302 . These grooves 304 are arranged to receive the detonating cord 114 . In some examples, the grooves 304 are arranged along a spiral path to allow the detonating cord 114 to be arranged in a spiral pattern around the perforator charges 112 .
  • FIG. 4 illustrates a different configuration of the modular propellant sleeve 222 .
  • the modular propellant sleeve 222 includes a tubular structure 400 that has respective openings 402 corresponding to positions of the perforator charges 112 in the loading tube 110 .
  • grooves (such as grooves 304 in FIG. 3 ) are not provided for interconnecting the openings of 402 .
  • the detonating cord 114 can be arranged along the outer surface of the tubular structure 400 .
  • FIG. 5 is a cross-sectional view of an example perforator charge 112 that includes a propellant material as noted above.
  • the perforator charge 112 can be implemented without a propellant material.
  • the perforator charge 112 includes an outer case 502 that acts as a containment vessel designed to hold the detonation force of the explosion of the perforator charge 112 for a length of time to allow for a perforating jet to form.
  • the outer case 502 can be formed of a metal, such as steel, or some other material.
  • a main explosive 504 is contained inside the outer case 502 .
  • the main explosive 504 is sandwiched between the inner wall of the outer case 502 and a surface of a liner 506 .
  • the liner 506 is generally conically shaped.
  • the main explosive 504 is also generally conically shaped between an inner wall of the outer case 502 and the liner 506 .
  • the liner 506 can be generally bowl-shaped or have a parabolic shape.
  • a rear portion of the outer case 502 has an opening 508 , which can be in the form of a semi-circular slot or a slot having another shape.
  • the opening 508 allows an end portion 510 of the main explosive 504 to be ballistically contacted to a primary explosive, such as the detonating cord 114 shown in FIG. 1 .
  • a retaining element 512 is attached (e.g. glued, welded, or otherwise attached) to the outer case 502 .
  • the retaining element 512 can be a retaining wire, for example, which is bendable for holding the detonating cord 114 against the rear portion 510 of the main explosive 504 .
  • the retaining element 512 can be another type of retaining element, or alternatively, the retaining element 512 can be omitted.
  • the perforator charge 112 further has an energetic material 514 , which is placed at a front portion of the perforator charge 112 .
  • the “front portion” of the perforator charge 112 is the portion of the perforator charge 112 through which the perforating jet extends upon detonation of the perforator charge 112 .
  • the “front portion” of the perforator charge 112 is at the front opening of the outer case 502 , through which the perforating jet passes.
  • the energetic material 514 is generally a discrete segment formed of the energetic material that is placed at the front portion of the perforator charge 112 .
  • a “discrete segment” of energetic material can refer to any layer, piece, or other amount of the energetic material that has a predefined extent such that the energetic material does not surround an outer surface 503 of the outer cover 502 . In some examples, the discrete segment of energetic material 514 does not contact any part of the outer surface 503 of the outer cover 502 .
  • the energetic material 514 is retained to the outer case 502 of the perforator charge 112 using a retaining structure that is attached to the outer case 502 .
  • the retaining structure can be a retaining shell (or retaining cap) 516 that covers the discrete segment of energetic material 514 .
  • the retaining shell 516 has a receiving chamber 518 in which the energetic material 514 is positioned.
  • the retaining shell 516 has a protruding portion 520 that extends into an inner opening of the energetic material 514
  • the retaining shell 516 is attached to the outer case 502 (at 517 ).
  • the attachment can be a threaded connection between the retaining shell 516 and the outer case 502 .
  • the retaining shell 516 can be attached to the outer case 502 using another type of attachment mechanism, such as by use of a screw, a rivet, glue, and so forth.
  • the retaining shell 516 has a protruding portion 220 that extends into an inner opening 515 (shown in FIG. 6 ) of the energetic material 514 .
  • FIG. 6 is a sectional view of the energetic material 514 , which is generally ring-shaped and has the inner opening 515 formed in the energetic material 514 .
  • the energetic material 514 is “generally” ring-shaped in that the energetic material 514 has a shape resembling a ring—note that manufacturing or design tolerances can cause the energetic material 514 to not have an exact ring shape.
  • a generally disk-shaped energetic material can be provided, which does not include the inner opening 515 in an inner portion (e.g. center) of the energetic material.
  • energetic materials having other shapes can be employed.
  • the perforator charge 112 can include a shock attenuator 522 positioned between the energetic material 514 and the main explosive 504 .
  • the shock attenuator 522 can be a layer of shock attenuation material, such as a polymer, plastic, a material containing air spaces or other voids, foam, cork, or any other metallic or non-metallic material of relatively low density.
  • the shock attenuator 522 in some examples can also be generally ring-shaped.
  • the shock attenuator 522 is arranged to cause a delay between the detonation of the explosive 504 and activation of the energetic material 514 .
  • This delay allows a perforation tunnel to first be formed by the perforating jet produced by the perforator charge 112 , after which activation of the energetic material 514 creates an energy wave for enlarging the perforation tunnel, creating fractures, and/or removing crushed zone damage.
  • the shock attenuator 522 can be omitted.
  • the detonating cord 114 of FIG. 1 is initiated, which causes detonation of the main explosive 504 in the perforator charge 112 .
  • Detonation of the main explosive 504 creates a detonation wave that causes the liner 506 to collapse under the detonation force of the main explosive 504 .
  • Material from the collapsed liner 506 forms a perforating jet which shoots out through the front opening of the outer case 502 and towards the surrounding structure, which can include the casing/liner 104 and the surrounding subterranean formation.
  • the collapse of the liner 506 under the detonation force starts near an apex portion 524 of the liner 506 , and proceeds to near the base portion 526 of the liner 506 .
  • the tip of the perforating jet produced from collapse of the liner 506 is formed by the apex portion 524 of the liner 506 , while the tail of the perforating jet is formed by the base portion 526 of the liner 506 .
  • the perforating jet extends through the opening 515 ( FIG. 6 ) of the energetic material 514 .
  • the energetic material 514 is activated, which produces an energy wave. Activation of the energetic material 514 is caused by the detonation wave of the main explosive 504 .
  • FIG. 7 illustrates a process of assembling a perforating apparatus according to some implementations.
  • the process of FIG. 7 can be performed by a manufacturer or by any other entity that is able to assemble a perforating apparatus.
  • the process provides (at 702 ) a carrier (e.g. loading tube 110 ), and explosive devices (e.g. perforator charges 112 ) are mounted (at 704 ) to the carrier.
  • Propellant cells e.g. 220
  • a propellant sleeve e.g. 224 or 226

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Forging (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
US13/397,077 2012-02-15 2012-02-15 Multi-element hybrid perforating apparatus Abandoned US20130206385A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US13/397,077 US20130206385A1 (en) 2012-02-15 2012-02-15 Multi-element hybrid perforating apparatus
CN201380019544.6A CN104220694A (zh) 2012-02-15 2013-02-15 多元件混合式射孔器械
RU2014136989A RU2014136989A (ru) 2012-02-15 2013-02-15 Многоэлементное гибридное перфорирующее устройство
PCT/US2013/026243 WO2013123268A1 (en) 2012-02-15 2013-02-15 Multi-element hybrid perforating apparatus
BR112014020176A BR112014020176A8 (pt) 2012-02-15 2013-02-15 Aparelho de perfuração, manga modular, e método de montagem de um aparelho de perfuração

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US13/397,077 US20130206385A1 (en) 2012-02-15 2012-02-15 Multi-element hybrid perforating apparatus

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US20130206385A1 true US20130206385A1 (en) 2013-08-15

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US13/397,077 Abandoned US20130206385A1 (en) 2012-02-15 2012-02-15 Multi-element hybrid perforating apparatus

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CN (1) CN104220694A (enrdf_load_html_response)
BR (1) BR112014020176A8 (enrdf_load_html_response)
RU (1) RU2014136989A (enrdf_load_html_response)
WO (1) WO2013123268A1 (enrdf_load_html_response)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8943944B2 (en) 2011-12-15 2015-02-03 Tong Oil Tools Co., Ltd Structure for gunpowder charge in multi-frac composite perforating devices
US8960289B2 (en) 2009-11-11 2015-02-24 Tong Oil Tools Co., Ltd. Combined fracturing and perforating method and device for oil and gas well
US9027667B2 (en) 2009-11-11 2015-05-12 Tong Oil Tools Co. Ltd. Structure for gunpowder charge in combined fracturing perforation device
US9038521B1 (en) * 2014-02-08 2015-05-26 Geodynamics, Inc. Apparatus for creating and customizing intersecting jets with oilfield shaped charges
US20150240607A1 (en) * 2012-03-02 2015-08-27 John H. Hales Perforating apparatus and method having internal load path
US9297243B2 (en) 2010-12-29 2016-03-29 Tong Oil Tools Co., Ltd Composite perforation method and device with propping agent
US9297242B2 (en) 2011-12-15 2016-03-29 Tong Oil Tools Co., Ltd. Structure for gunpowder charge in multi-frac composite perforating device
US9562421B2 (en) 2014-02-08 2017-02-07 Geodynamics, Inc. Limited entry phased perforating gun system and method
US9835014B2 (en) * 2013-04-27 2017-12-05 Xi'an Ruitong Energy Technology Co., Ltd Coaxial perforating charge and its perforation method for self-eliminating compacted zone
US9845666B2 (en) 2014-02-08 2017-12-19 Geodynamics, Inc. Limited entry phased perforating gun system and method
US9896920B2 (en) * 2014-03-26 2018-02-20 Superior Energy Services, Llc Stimulation methods and apparatuses utilizing downhole tools
US20180299234A1 (en) * 2017-04-13 2018-10-18 Lawrence Livermore National Security, Llc Modular gradient-free shaped charge
US20190113315A1 (en) * 2017-10-18 2019-04-18 Peng Dai Device and method for enhacning well perforating

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CN105840152B (zh) * 2015-01-15 2018-10-16 中国石油天然气股份有限公司 射孔管柱

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8960289B2 (en) 2009-11-11 2015-02-24 Tong Oil Tools Co., Ltd. Combined fracturing and perforating method and device for oil and gas well
US9027667B2 (en) 2009-11-11 2015-05-12 Tong Oil Tools Co. Ltd. Structure for gunpowder charge in combined fracturing perforation device
US9297243B2 (en) 2010-12-29 2016-03-29 Tong Oil Tools Co., Ltd Composite perforation method and device with propping agent
US8943944B2 (en) 2011-12-15 2015-02-03 Tong Oil Tools Co., Ltd Structure for gunpowder charge in multi-frac composite perforating devices
US9297242B2 (en) 2011-12-15 2016-03-29 Tong Oil Tools Co., Ltd. Structure for gunpowder charge in multi-frac composite perforating device
US20150240607A1 (en) * 2012-03-02 2015-08-27 John H. Hales Perforating apparatus and method having internal load path
US10337299B2 (en) * 2012-03-02 2019-07-02 Halliburton Energy Services, Inc. Perforating apparatus and method having internal load path
US9835014B2 (en) * 2013-04-27 2017-12-05 Xi'an Ruitong Energy Technology Co., Ltd Coaxial perforating charge and its perforation method for self-eliminating compacted zone
US9038521B1 (en) * 2014-02-08 2015-05-26 Geodynamics, Inc. Apparatus for creating and customizing intersecting jets with oilfield shaped charges
US9845666B2 (en) 2014-02-08 2017-12-19 Geodynamics, Inc. Limited entry phased perforating gun system and method
US9562421B2 (en) 2014-02-08 2017-02-07 Geodynamics, Inc. Limited entry phased perforating gun system and method
US9896920B2 (en) * 2014-03-26 2018-02-20 Superior Energy Services, Llc Stimulation methods and apparatuses utilizing downhole tools
US20180299234A1 (en) * 2017-04-13 2018-10-18 Lawrence Livermore National Security, Llc Modular gradient-free shaped charge
US10731955B2 (en) * 2017-04-13 2020-08-04 Lawrence Livermore National Security, Llc Modular gradient-free shaped charge
US20190113315A1 (en) * 2017-10-18 2019-04-18 Peng Dai Device and method for enhacning well perforating

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RU2014136989A (ru) 2016-04-10
BR112014020176A8 (pt) 2017-07-11
BR112014020176A2 (enrdf_load_html_response) 2017-06-20
WO2013123268A1 (en) 2013-08-22
CN104220694A (zh) 2014-12-17

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