CA3089193A1 - Direct connecting gun assemblies for drilling well perforations - Google Patents
Direct connecting gun assemblies for drilling well perforations Download PDFInfo
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- CA3089193A1 CA3089193A1 CA3089193A CA3089193A CA3089193A1 CA 3089193 A1 CA3089193 A1 CA 3089193A1 CA 3089193 A CA3089193 A CA 3089193A CA 3089193 A CA3089193 A CA 3089193A CA 3089193 A1 CA3089193 A1 CA 3089193A1
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- Prior art keywords
- gun
- pin
- end cap
- box
- charge carrier
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- Abandoned
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- 238000005553 drilling Methods 0.000 title description 6
- 230000000712 assembly Effects 0.000 title description 4
- 238000000429 assembly Methods 0.000 title description 4
- 239000002800 charge carrier Substances 0.000 claims abstract description 45
- 230000013011 mating Effects 0.000 claims abstract description 5
- 238000010304 firing Methods 0.000 claims description 15
- 238000005474 detonation Methods 0.000 claims description 4
- 241000353097 Molva molva Species 0.000 claims 1
- 230000005021 gait Effects 0.000 claims 1
- HQQSBEDKMRHYME-UHFFFAOYSA-N pefloxacin mesylate Chemical compound [H+].CS([O-])(=O)=O.C1=C2N(CC)C=C(C(O)=O)C(=O)C2=CC(F)=C1N1CCN(C)CC1 HQQSBEDKMRHYME-UHFFFAOYSA-N 0.000 claims 1
- 230000001902 propagating effect Effects 0.000 claims 1
- 235000020637 scallop Nutrition 0.000 abstract description 5
- 241000237503 Pectinidae Species 0.000 abstract description 4
- 238000005304 joining Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 10
- 239000002360 explosive Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 230000001012 protector Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 241000237509 Patinopecten sp. Species 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 238000013101 initial test Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- E21B43/119—Details, e.g. for locating perforating place or direction
-
- 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
- E21B43/116—Gun or shaped-charge perforators
- E21B43/1185—Ignition systems
Landscapes
- 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)
- Fuses (AREA)
- Connector Housings Or Holding Contact Members (AREA)
Abstract
A perforation gun assembly comprising a plurality of guns with a box fitting at one end and a modified pin fitting at the distal end, the modified pin fitting further comprising an end cap secured to an internal charge carrier, aligning a plurality of shape charges with scallops in the gun casing, and having a pressure switch, which connects to an electrical connection point at the box end of a charge carrier in an adjacent gun. The end cap being captured between the pin of one gun and the internal edge of the mating gun to protect and channel blast force to the pressure switch.
Description
Direct Connecting Gun Assemblies for Drilling Well Perforations BACKGROUND OF THE INVENTION
Cross-Reference to Related. Applications 10091 I This application is related to and expands on the inventor's previously filed applications:
U.S. 15/312,120, "Apparatus for Electromechanically Connecting a Plurality of Guns for Well Perforation" filed 17 November 2016; U.S.151586,439, "Apparatus and Method for Quick Connect of a Plurality of Guns for Well Peribration", filed. 04 May 2017; and U.S. 151615,553, "Electromechanical .Assembly fbr Routing Electrical. Signals in Guns for Well Pertbration", filed 06 June 2.017; each of which, by this statement, is incorporated herein by reference for all purposes.
Statement Regarding iFederaIlv Sponsored Researeh or Development [00021 Not Applicable.
Reference to Sequence Listing, a Table, or a Computer Program Listing Compact Disc Appendix [0003] Not Applicable.
Field. of the Invention [00041 This invention refers in general to an integral assembly (a "perf assembly") of a plurality of perforating guns ("guns") containing, a plurality of shape charges ("charges"). This pert', assembly is used in perforation of wells during a drilling process. This invention is particularly directed to a new electro-mechanical assembly for joining a .s(Ties.. of guns to allow reliable a.ssembly and. reliable sequential firing of the guns during the fracturing process of production wells. This process of well fracturing consists of safely assembling, wiring, lowering, detonating, and retrieving the residual materials of a plurality of shape charges in an assembly of perlbrating guns. The process perforates the well casing, the cement surrounding the casing in the bore hole, and causes cracking of the surrounding ground materials and rock formations.
While this invention is generally found. in the petroleum production industry, it may be equally applied to other environments of drilling production where perforation of well casing into the surrounding environment is necessary, such as water wells.
Background of the invention [00051 The perforation of petroleum wells is accomplished by lowering into the well a perf assembly comprised of a plurality of perforating guns each containing. a plurality of shape charges oriented around the central axis. The guns are connected. end to end and wired. in sequence to a firing circuit which is in communication with a firing control at the surface. The plurality of guns is coupled by intermediate subs containing pass through tvenings for the wiring of firing signals and spacing to isolate explosive force of one gun from damaging those of an adjacent gun to be fired later in the sequence, [00061 In previous applications intermediate subs were substantial in. size and weight, They contained pass-through openings from end to end and side access compartments allowing access to interior wiring. These subs were often destroyed or damaged beyond repair during firing sequences. Other embodiments attempted to reduce this waste by developing smaller, less substantial subs where wiring: was connected prior to joining the sttbs.
These. smaller subs were still damaged often, but the wasted materials and financial loss was reduced.
Cross-Reference to Related. Applications 10091 I This application is related to and expands on the inventor's previously filed applications:
U.S. 15/312,120, "Apparatus for Electromechanically Connecting a Plurality of Guns for Well Perforation" filed 17 November 2016; U.S.151586,439, "Apparatus and Method for Quick Connect of a Plurality of Guns for Well Peribration", filed. 04 May 2017; and U.S. 151615,553, "Electromechanical .Assembly fbr Routing Electrical. Signals in Guns for Well Pertbration", filed 06 June 2.017; each of which, by this statement, is incorporated herein by reference for all purposes.
Statement Regarding iFederaIlv Sponsored Researeh or Development [00021 Not Applicable.
Reference to Sequence Listing, a Table, or a Computer Program Listing Compact Disc Appendix [0003] Not Applicable.
Field. of the Invention [00041 This invention refers in general to an integral assembly (a "perf assembly") of a plurality of perforating guns ("guns") containing, a plurality of shape charges ("charges"). This pert', assembly is used in perforation of wells during a drilling process. This invention is particularly directed to a new electro-mechanical assembly for joining a .s(Ties.. of guns to allow reliable a.ssembly and. reliable sequential firing of the guns during the fracturing process of production wells. This process of well fracturing consists of safely assembling, wiring, lowering, detonating, and retrieving the residual materials of a plurality of shape charges in an assembly of perlbrating guns. The process perforates the well casing, the cement surrounding the casing in the bore hole, and causes cracking of the surrounding ground materials and rock formations.
While this invention is generally found. in the petroleum production industry, it may be equally applied to other environments of drilling production where perforation of well casing into the surrounding environment is necessary, such as water wells.
Background of the invention [00051 The perforation of petroleum wells is accomplished by lowering into the well a perf assembly comprised of a plurality of perforating guns each containing. a plurality of shape charges oriented around the central axis. The guns are connected. end to end and wired. in sequence to a firing circuit which is in communication with a firing control at the surface. The plurality of guns is coupled by intermediate subs containing pass through tvenings for the wiring of firing signals and spacing to isolate explosive force of one gun from damaging those of an adjacent gun to be fired later in the sequence, [00061 In previous applications intermediate subs were substantial in. size and weight, They contained pass-through openings from end to end and side access compartments allowing access to interior wiring. These subs were often destroyed or damaged beyond repair during firing sequences. Other embodiments attempted to reduce this waste by developing smaller, less substantial subs where wiring: was connected prior to joining the sttbs.
These. smaller subs were still damaged often, but the wasted materials and financial loss was reduced.
2 10007] The method of joining a plurality of guns with intermediate subs with multiple connections means wires are often twisted, broken, or can pull. loose during the asseMbly process by the act of screwing on sobs and :joining the components together. In short, more .connections equal more potential .problerns. This results in assemblies having to he deconstructed and .mpaired. Additionally, weakened wires. may pass initial test during construction only to fail during the process of lowering the assembly to depth, or due to Vibrations of early charges in the .sequence 100081 The preferred method is Co fire the farthestliowest gun first. Then, sequentially fire each.
gun back toward the well. opening. This is because the explosion/pressure/debris from one gun's.
firing can possibly damage neighboring gong.. Wires break, or connectors loosen during shock:wave:vibrations, or by blast force. Unfired guns are highly undesirable, a.s. they .are.
hazardous to bring to the surface due to the dangers of handling explosives which are not known.
to be in a. safe condition or state, 10099] To fulfill the operation.bfietly described above, while simultaneously respecting existing norms kr the manipulation of explosives, highly capable operators must arm and assemble the guns at the wellhead, stripping the ends of insulated .connecting wires and joining them in prescribed configurations., then re-insulating and protecting .from sharp:
edges, crimping, etc. the exposed wires resulting in an 'artii,41tial' activity reqUiring skill and .extreme caution.
[00101 It should be noted that petroleum production and exploration activities are generally' :located in areas with hostile climatic .conditions for the operators; work hours are assigned in .accordance,. to the needs of the o.peration and may include nighttime and daytime hours, with
gun back toward the well. opening. This is because the explosion/pressure/debris from one gun's.
firing can possibly damage neighboring gong.. Wires break, or connectors loosen during shock:wave:vibrations, or by blast force. Unfired guns are highly undesirable, a.s. they .are.
hazardous to bring to the surface due to the dangers of handling explosives which are not known.
to be in a. safe condition or state, 10099] To fulfill the operation.bfietly described above, while simultaneously respecting existing norms kr the manipulation of explosives, highly capable operators must arm and assemble the guns at the wellhead, stripping the ends of insulated .connecting wires and joining them in prescribed configurations., then re-insulating and protecting .from sharp:
edges, crimping, etc. the exposed wires resulting in an 'artii,41tial' activity reqUiring skill and .extreme caution.
[00101 It should be noted that petroleum production and exploration activities are generally' :located in areas with hostile climatic .conditions for the operators; work hours are assigned in .accordance,. to the needs of the o.peration and may include nighttime and daytime hours, with
3 extreme cold or heat and rain or wind. Hours are controlled by working against the clock and by penalizing deadlines and other. pressures. To that respect, it is necessary that the strictest safety norms he followed while handling explosive material; all of these factors taken together contribute to an increased likelihood that operators may commit errors while wiring or assembling the goli8 biltO a pen t^ assembly to be introduced into the well..
Forther, even if the.
operators do everything correctly, the, actions required to connect the pipe sections that make up.
the lie assembly may still produce a costly mistake.
[NM From the above facts, there exists an obvious need to simplify the operation of arming:
and joining the guns into a pelf assembly, There is also a need to ensure that the firing of one gun does not introduce faults into: the remaining portions of the perf assembly preventing the required firing sequence. The object of this invention deals with the means to .perform the electromechanical connection of the gun assembly.
BRIEF DESCRIPTION OF THE DRAWINGS
l0011] FIG. 1 is a cros,section of an assentbly of multiple armed and assembled guns in a manner that is utilized in the industry, l0012] FIG. 2: shows a cross section of a single gun joined on each end to an adjacent gun.
[0013] FIG. 3 shows a cross. section of an intermediate .sub containing a pressure switch joining two adjacent guns with pass through wiring.
[0014] FIG. 4 shows a cross section of a Junction of two perf guns by an insulating contact pin contained within an intermediate sub.
Forther, even if the.
operators do everything correctly, the, actions required to connect the pipe sections that make up.
the lie assembly may still produce a costly mistake.
[NM From the above facts, there exists an obvious need to simplify the operation of arming:
and joining the guns into a pelf assembly, There is also a need to ensure that the firing of one gun does not introduce faults into: the remaining portions of the perf assembly preventing the required firing sequence. The object of this invention deals with the means to .perform the electromechanical connection of the gun assembly.
BRIEF DESCRIPTION OF THE DRAWINGS
l0011] FIG. 1 is a cros,section of an assentbly of multiple armed and assembled guns in a manner that is utilized in the industry, l0012] FIG. 2: shows a cross section of a single gun joined on each end to an adjacent gun.
[0013] FIG. 3 shows a cross. section of an intermediate .sub containing a pressure switch joining two adjacent guns with pass through wiring.
[0014] FIG. 4 shows a cross section of a Junction of two perf guns by an insulating contact pin contained within an intermediate sub.
4
5 PCT/US2018/068087 10015] FIG. 5 shows across section of a reduced intermediate sub joining two adjacent guns.
[00161 HG. 6A shows. a perspective view of a pin end cap, in accordance with an exemplary embodiment of the invention, [00171 FIG. 6B shows a cross section of the pin end cap from FIG 6A.
10018] FIG. 6C shows an end view of the pin end cap from FIG 6A a viewed from the pin end of the gun.
10019] FIG. 7A shows a perspective view of a box end cap as viewed from the box end of the gun, in accordance with an exemplary embodiment of the invention.
10020] FIG. 713 shows a perspective view of the box end cap from F10, 7A as viewed from the reverse angle.
10021i FIG. 7C shows a emss section of the box end cap from FIG. 7A.
[0022] FIG. SA shows a perspective view of a pressure switch retainer seal, in accordance with an exemplary embodiment of the invention.
[00231 FIG. 813 shows a cross section of the pressure switch retainer seal from .FIG Si.
[00.241 FIG. 9A shows a perspective view of an electrical it/sort to the box end cap from FIG 7A, in accordance with an exemplary embodiment of the invention.
[00.251 FIG. 913 shows a cross section of the elecnical insert. from FIG. 9A
and its orientation/assembly with. the box end cap from FIG 7.A.
100261 FIG. 10 shows a cross :section of a single gun with the pin end caps and box end caps, in accordance with an exemplary embodiment of the invention, [0027] FIG. 11 shows a. cross section close-up of adjacent guns with pin, and box connection, joined and COnfigured far discharge thr(yugh direct COMIectiop alone gun to the adjacent gun in accordance with an exemplary embodiment of the invention.
DETAILED DESCRIPTION' OF TUE PREFERRED EMBODIMENTS
100281 In previous applications, which are referenced and incorporated above, the inventor discussed, inter alia, utilization of improved performance via specialized end caps on the charge carriers to protect the wires amber guns in the pelf assembly during handling and blasting operations. However, connection of these assemblies required stringent.
spacing requirements,.
intermediate subs, and additional wiring components and connections to ensure assembling did not cause pressure switches and contact pins to prematurely activate, or fail to pass a.-firing signal rendering one or more guns inoperable.
[0029] By reconfiguring the charge carrier end caps to directly connect to neighboring guns without the need for intermediate wiring, and .utijizing standard drilling pipe configurations of a pin on one end and a box on the distal end, reliable assembly with fewer connections and minimal waste components can be achieved to reduce resources and improve functionality of peribration operations in the industry, 10030] in standard configurations, the end of the pipe box. contacts the external shoulder of the pipe pin., and the pipe pin bottoms out against the internal shoulder of the pipe box in what is
[00161 HG. 6A shows. a perspective view of a pin end cap, in accordance with an exemplary embodiment of the invention, [00171 FIG. 6B shows a cross section of the pin end cap from FIG 6A.
10018] FIG. 6C shows an end view of the pin end cap from FIG 6A a viewed from the pin end of the gun.
10019] FIG. 7A shows a perspective view of a box end cap as viewed from the box end of the gun, in accordance with an exemplary embodiment of the invention.
10020] FIG. 713 shows a perspective view of the box end cap from F10, 7A as viewed from the reverse angle.
10021i FIG. 7C shows a emss section of the box end cap from FIG. 7A.
[0022] FIG. SA shows a perspective view of a pressure switch retainer seal, in accordance with an exemplary embodiment of the invention.
[00231 FIG. 813 shows a cross section of the pressure switch retainer seal from .FIG Si.
[00.241 FIG. 9A shows a perspective view of an electrical it/sort to the box end cap from FIG 7A, in accordance with an exemplary embodiment of the invention.
[00.251 FIG. 913 shows a cross section of the elecnical insert. from FIG. 9A
and its orientation/assembly with. the box end cap from FIG 7.A.
100261 FIG. 10 shows a cross :section of a single gun with the pin end caps and box end caps, in accordance with an exemplary embodiment of the invention, [0027] FIG. 11 shows a. cross section close-up of adjacent guns with pin, and box connection, joined and COnfigured far discharge thr(yugh direct COMIectiop alone gun to the adjacent gun in accordance with an exemplary embodiment of the invention.
DETAILED DESCRIPTION' OF TUE PREFERRED EMBODIMENTS
100281 In previous applications, which are referenced and incorporated above, the inventor discussed, inter alia, utilization of improved performance via specialized end caps on the charge carriers to protect the wires amber guns in the pelf assembly during handling and blasting operations. However, connection of these assemblies required stringent.
spacing requirements,.
intermediate subs, and additional wiring components and connections to ensure assembling did not cause pressure switches and contact pins to prematurely activate, or fail to pass a.-firing signal rendering one or more guns inoperable.
[0029] By reconfiguring the charge carrier end caps to directly connect to neighboring guns without the need for intermediate wiring, and .utijizing standard drilling pipe configurations of a pin on one end and a box on the distal end, reliable assembly with fewer connections and minimal waste components can be achieved to reduce resources and improve functionality of peribration operations in the industry, 10030] in standard configurations, the end of the pipe box. contacts the external shoulder of the pipe pin., and the pipe pin bottoms out against the internal shoulder of the pipe box in what is
6 referred to as a double shoulder design. The double shoulder design provides a mechanical stop to the connection, a sealing surface and friction to allow for greater torque.
In the innovation described herein, the standard box configuration may be utilized unmodified at one end of the gun body casing. However, the pin end of the gun body casing must be modified in several critical ways.
[0031] The pin is shortened so the pin end cap of the charge carrier protrudes from the pipe on the pin end. The pin end. cap is a cylindrical mass attached on an inner side to the charge carrier, and having an opening on the outer side fOr inserting and securing a pressure switch. The opening extends through the: pin end cap to allow the wires of the pressure switch to extend into the charge carrier where they are connected to a detonator for the gun.
[0032] The pin end cap's. inner end has a diameter less than the charger carrier tube, and is inserted into one end of the charge carrier and secured by screws through holes in the charge carrier threaded into the body of the pin end cap. External to the charge carrier, the pin end. cap's diameter enlarges to approximately the inner diameter of the gun body casing, and includes a screw hole in one side threading into the side of the cylinder. A screw passes through a hole in the side wall of the gun body casing, and is recessed so as not to block the threads. This screw aligns the charger carrier to ensure the shaped charges therein are proximal to their corresponding scallops on the external surface of the gun body casing.
[00331 The pin end cap's external side further enlarges in diameter to create a step ring which has an outer diameter greater than the inner diameter of the gun casing, and less than the inner diameter of the pipe box. This step ring is secured between the shoulder at the bottom of the box, and the end of the pin, to protect one gun. from the blast tbrce of the adjoining gun.
1'034] External to the step ring, the outer end of the pin end cap's outer diameter reduces to les$
than the inner diameter of the gun body casing and contains a plurality of grooves for retaining 0-rings. The 0-rings seal the pin end cap against the inner wall of the adjoining gun body easing once assembled.
[00351 At the distal end of the charge carrier, i.e. the box end of the gun, the charge carrier is connected to a box end cap. The box end cap is a circular diskiwith a cylinder extending from one flat side toward the charge carrier. The cylinder walls are secured to the walls of the end of the charge carrier. The outer edge of the box. end cap also extends toward the charge carrier to form a second larger diameter cylinder, which slides along the interior side wall of the gun body casing as the charge carrier is inserted or removed from the gun body casing, and ensures the charge carrier and gun body casing are coaxial<
[00361 'The external side of the boxend cap extends outward in a cylinder which supports one or more spring tabs which extend back into the charge carrier and connect with the firing signal wire running to the pressure switch on the distal end of the gun. the preferred embodiment, the clips are secured to a conductive base which is secured to the end cap and electrically connected to the firing signal wire, [00371 The clips. are positioned to contact the electrical connector of the pressure switch secured.
in the pin end cap of the adjoining gun, but to allow the blast pressure to disengage the electrical connector and trigger the pressure switch, thus activating the wiring of the detonator of the adjoining gun for later firing sequences. One skilled in the art would appreciate other methods of securing fire signal wire to the electrical connector of the adjoining gum it)038] The pressure switch is secured in the pin end cap by a pressure switch retaining seal which is secured to the inside of the pressure switch opening of the pin: end cap, and flares outward from the olectrieal connector of the pressure switch to enclose the cylinder Which supports the clips on the box end cap. The pressure .switch retaining seal is compressible, so it will seal between the adjoining guns upon assembly to guide the blast force from one gun to the pressure switch of the next gun.
I00391 The plurality of guns may be assembled and tested in a more desirable environment, and secured by thread protectors for shipment to the drilling site. On site, the alignment screw is removed from the pin end and the charge carrier is partially withdrawn. from the p.m body casing to allow the detonator to be wired to the pressure switch. The charge carrier is then reinserted and aligned by the alignment screw.
EOM] Once aligned, screwing the pipe threading of the pin and box ends of the guns together forces the electrical contact of the pressure switch in one gun to connect to the clips in the box end connector of the adjacent gun, and the pressure switch retaining seal deforms as the step ring of the pin end cap is secured between the shoulder at the bottom of the box, and the end of the pin, thus completing the connections.
100411 Should disassembly be required, unscrewing the pipe thread would pull the electrical contact of the pressure switch from the clips of the adjoining gun. The pressure switch retaining seal inay return to shape, or possibly require replacement depending on the easticit of the construction material. At this point the thread protectors on be replaced and/or the detonator may need to be removed.
DETAILED DESCRIPTION OF THE DRAWINGS
[00421 The following is a detailed description of exemplary embodiments to illustrate the principles of the invention. The ethbodiments are provided to illustrate aspects of the innovation, bat the, invention is not limited to any embodiment. As those skilled'in the art will appreciate, the scope of the invention encompasses numerous alternatives, modifications, and equivalent.
100431 FIG, I is a cross-section of all assembly of multiple armed and assembled guns in a manner that is utilized in the industry. The perf assembly (1) has a firing head (2), a plurality of perforating guns (3), each containing a charge carrier, two tandem subs (4), and a bottom sub (3).
in such a configuration, the tandem subs (4) may contain access ports (6) for accessing internal wiring during assembly, [00441 FIG. 2 shows a cross section of a single gun joined on each end to an adjacent gun. hi the example shown, a tandem sub assembly is associate with each gun, as is standard in the industry.
The gun (3) comprises a charge carrier (13) with a plurality of explosive shape charges (16) joined by a detonation cord or fuse (19). The charge carrier (13) is supported, substantially centered, within the gun body casing (12) by an insniating top end (14) and an isolating bottom end (15) The top and bottom ends of the charge cattier may be one of several configurations.
some of which are described in the applicant's other innovation descriptions incorporated above.
The specifics of the top and bottom ends are not significant to the innovation described in this specific application.
100451 One can see in the interior of the carrier (13) that the shaped charges (16) are shown set in radial fashion petpendicular to the gun wall, to the carrier, and, when the guns are within the well, to the well casing: in the illustration, six shape charges are illustrated, but the actual number and orientation will vary, [0046] The shaped charges arc explosives set in such a manner that they concentrate the force of the explosion outward, generating ajet of gas (plasma) at high pressure and temperature, that pulls the metal, from the interior of the charge and prgjects it outward until. it arrives at the well formation; with this action, the charges produce a perforating effect that is variable in proportion to the potency of the charges. It is well known practice to scallop the gun body easing to reduce the force necessary to pierce the casing at the desired location, and so that burrs formed from the perforation do not damage the walls of the well during later extraction of the, gun after firing.
10047l hi each intermediate Joint or intermediate sub or tandem sub (4) one can see the pressure activated changeover switch (17) retWred to as the pressure switch, from which wires extend to the rest of the assembly. When the detonator is activated, a detonation is propagated by way of a "fuse .. or detonating cord (19) .. to each of the shaped charges in the carrier (13) that burst in simultaneous fashion within the corresponding gun (3).
[0048] FIG. $ shows a cross section of an intermediate 61,lb coutaiti.ing a pressure switch joining two adjacent guns with pass through wiring. The gun body casing (12) of each gun has a box.
end with the charge carrier (13) terminated by a .end cap (400) and secured in the gun body casing (12) by a snap ring. (600). The intermediate sub (4) has two pin ends, a pass through .opening for Wiring, and the option of inserting. a pressure switch (12) at either end to ensure it is dose to the .anticipated 'blast direction_ In the left side gun, a spring-loaded connector pin. (500) .eontacts the electrical contact of the pressure switch (17), which is held M
the tandem sub (4) which was previously wired (IF and G) to the adjoining gun..
[0049] FIG, 4 shows: a cross section of a itmetion of two pelf guns by an insulating contact pin.
contained within an intermediate sub. The insulating contact pin (610) is also known as a propagator. The purpose is to connect the fire signal wire between the two guns across the intermediate sub or tandem :sub (4), The propagator (MO) connects to the insulating contact pins (500) of either :gun's charge earrier (1.3). The charger canier (13) is centred in the gun body easing. (1..2)..by a connector end cap (400) and. secured by a snap ring (00), The purpose is W
electrically connect the fire signal wires (F, not shown). of the two guns, and without the potential.
to exert excess force on the .pressure switch (17, not shown), possibly prematurely- triggering it and thus disarming the lower guns.
[0050] FIG. 5 shows a.cross section of a. reduced intermediate -sub joining two adjacent guns.
'The reduced intermediate sub MO) has pin pipe connections at both ends and is joining two adjacent gun casings (12) With box pipe connections at both a.djoining ends.
This .configuration.
utilizes a specialized end cap (700) on the letl charge carrier (1,3) which has an opening for a pressure switch (17), The pressure switch (17) is wired to the left gun then secured to the end cap (700) by threading (940) the intermediate sub (900). 0-rings (950) help to seal the joint.
The right gun case (12) has a Charge carrier (13) ending in another specialized end cap (400) which accommodates a spring-loaded insulated pin (500) which mates with the pressure switch (17) when threaded to the opposite end of the intermediate sub (900).
l0051l FIG. 6A. shows a perspective view of a pin end cap, in accordance with an exemplary embodiment of the invention. FM. 6B shows a cross section of the pin end cap from FIG 6A.
FIG. 6C shows an end view of the pin end cap from FIG 6.A as viewed from the gin end of the gun.
1.00521 The pin end cap (1100) has an inner face (1110) oriented toward the charge carrier (13, not illustrated), and a distal outer face (1120) oriented toward the adjoining gun. The outer end's diameter has a plurality of recesses (1130) for 0-rings Which seal against the interior surface of the corresponding gun body casingõk step ring (1140) is larger than the interior of the gun body casing, but small enough to slide into, and bottom against the interior shoulder of the threaded box end of the adjoining gun..
[00531 The pin end cap (1100) is secured to the interior surface of the pin end of the gun body casing with an alignment screw (1150) which also serves to align the shape charges of the charge.
carrier with the scallops on the exterior surface of the gun body casing. The charge carrier secured to the pin end cap (1100) by screws through the carrier sidewalls oriented into the screw holes (1145) on the pin end cap. A pass through (1160) along the axis of the pin end cap (1100) allows the pressure switch (17, not shown) to be inserted through the outer face (1120) with the wires extending into the charge carrier to connect with the detonator (19, not shown). The outer face (1120) may be recessed and/or may have screw holes, or other connection points for support of legacy systems.
[0054l FIG. 7A shows a perspective view of a. box end cap as viewed from the box end of the gun, in accordance with an exemplary embodiment of the invention. FIG. 7B
shows a perspective view of the box end. cap from FIG. 7A as viewed from the reverse angle. FIG. 7C
shows a cross section of the box end cap from FIG:. 7A.
(0055] The box end cap (1200) is a circular disk with an inner side (12)0) and an outer face (1220). A charge carrier mating surface (1.240) is a cylinder extending from the inner C.
(121.0), and containing two screw holes (1245) .for securing the charge carrier, The outer edge (1230) of the box end cap (1200) thrills a second larger diameter cylinder, to center the charge carrier within the gun body casing.
[0056] The external side of the box end cap extends outward in .a cylinder (1250). which supports one or more spring tabs of an electrical connector illustrated below which is secured to the box end cap through a screw hold (1260), [00571 FIG. SA shows a. perspective view of a pressure switch retainer seal, in accordance with an exemplary embodiment of the invention. FIG. 813 shows a cross section of the pressure switch. retainer seal from FIG 8A, 10058] The pressure switch retainer seal (1300) has a retainer end (1310) which surrounds the electrical contact of the pressure switch and hold it into the pin end cap's pass through (1160) by a plurality of friction rings (1320). The pressure guide end (1330) of the pressure switch retainer seal (1300) has a mating surface (1340) which contacts against the outer surface (122(l) of the box end cap (1250) and encompasses the cylinder (1250) supporting the electrical clips (1450), [0059] FIG. 9A shows a perspective view of an electrical insert to the box end cap .from FIG 7.A, in accordance with an exemplary embodiment of the invention. Fla 913 shows a.
cross section of the electrical insert from PIO, 9A and its orientation/assembly with the box end. cap from FIG
7A.
(04160] The electrical insert (1400) has a. cylindrical mass 0410) which S
electrically conductive and provides structural support. Two opposing spring clips (1450) have conductive ends (1459) which mate with the mass (1410) through two opposed holes (1420). The clips (1.45(1) are oriented by retainer sections (1457) 'between the mass (1410) and the box end cap (1200) into the clip support ring (1250) where the ends are curved back upon themselves to provide a spring connection (1455), The electrical components are then secured to the box end cap by a screw (1440) pass* through the end cap hole (1260) and the mass (1410) to the fire signal wire (I19 and secured with a retaining nut (1445), 10061 FIG, 10 shows a cross section of a single gun with the pin end caps and box end caps, in accordance with an exemplary embodiment of the invention, The charge carrier (1.3) with the shape charges (16) terminates at the box end (2.5) of the gun casing body (12, not labeled) with the box end cap (1200) and its electrical insert 1400) carrying the fire signal wire (F., not labeled).
100621 At the distal end, the pin end (27) of the gun casing body (12, not labeled), the detonator (19) connects to the pressure switch (17) held into the pin end cap (1100) by the pressure switch retainer seal (1300). The alignment screw (1150) ensure the shape charges (16) are oriented correctly in respect to the scallops in the exterior surface of the gun body casing (12, not labeled), 100631 FIG. 1 I shows a cross section close -sup of adjacent guns with pip and box :connection, joined and configured for discharge through direct connection of one gun to the adjacent gun in accordance with. an exemplary embodiment of the invention.
100641 The diagrams in accordance with exemplary embodiments of the present invention are provided as e-xatnples and should not be construed to limit other embodiments within the scope of the invention. For instance, heights, widths, and thicknesses may not be to scale and should not be construed to limit the invention to the proportions illustrated.
Additionally, some elements illustrated in the singularity may be implemented in a plurality.
Sonic element illustrated in the plurality could vary in count. Sonic elements illustrated in one form could vary in detail and should be interpreted as illustrative for discussing exemplary etribodiments. Such specific information is not provided to limit the invention.
100651 The above diScUsSion is Meant to be illustrative Of the principles and variotts, embodiments of the present invention. Numerous' variations and modifications will become apparent to those skilled in the art once the above disclosure is hilly appreciated. It is intended that the following claims be interpreted to embrace all such variations and modifications.
In the innovation described herein, the standard box configuration may be utilized unmodified at one end of the gun body casing. However, the pin end of the gun body casing must be modified in several critical ways.
[0031] The pin is shortened so the pin end cap of the charge carrier protrudes from the pipe on the pin end. The pin end. cap is a cylindrical mass attached on an inner side to the charge carrier, and having an opening on the outer side fOr inserting and securing a pressure switch. The opening extends through the: pin end cap to allow the wires of the pressure switch to extend into the charge carrier where they are connected to a detonator for the gun.
[0032] The pin end cap's. inner end has a diameter less than the charger carrier tube, and is inserted into one end of the charge carrier and secured by screws through holes in the charge carrier threaded into the body of the pin end cap. External to the charge carrier, the pin end. cap's diameter enlarges to approximately the inner diameter of the gun body casing, and includes a screw hole in one side threading into the side of the cylinder. A screw passes through a hole in the side wall of the gun body casing, and is recessed so as not to block the threads. This screw aligns the charger carrier to ensure the shaped charges therein are proximal to their corresponding scallops on the external surface of the gun body casing.
[00331 The pin end cap's external side further enlarges in diameter to create a step ring which has an outer diameter greater than the inner diameter of the gun casing, and less than the inner diameter of the pipe box. This step ring is secured between the shoulder at the bottom of the box, and the end of the pin, to protect one gun. from the blast tbrce of the adjoining gun.
1'034] External to the step ring, the outer end of the pin end cap's outer diameter reduces to les$
than the inner diameter of the gun body casing and contains a plurality of grooves for retaining 0-rings. The 0-rings seal the pin end cap against the inner wall of the adjoining gun body easing once assembled.
[00351 At the distal end of the charge carrier, i.e. the box end of the gun, the charge carrier is connected to a box end cap. The box end cap is a circular diskiwith a cylinder extending from one flat side toward the charge carrier. The cylinder walls are secured to the walls of the end of the charge carrier. The outer edge of the box. end cap also extends toward the charge carrier to form a second larger diameter cylinder, which slides along the interior side wall of the gun body casing as the charge carrier is inserted or removed from the gun body casing, and ensures the charge carrier and gun body casing are coaxial<
[00361 'The external side of the boxend cap extends outward in a cylinder which supports one or more spring tabs which extend back into the charge carrier and connect with the firing signal wire running to the pressure switch on the distal end of the gun. the preferred embodiment, the clips are secured to a conductive base which is secured to the end cap and electrically connected to the firing signal wire, [00371 The clips. are positioned to contact the electrical connector of the pressure switch secured.
in the pin end cap of the adjoining gun, but to allow the blast pressure to disengage the electrical connector and trigger the pressure switch, thus activating the wiring of the detonator of the adjoining gun for later firing sequences. One skilled in the art would appreciate other methods of securing fire signal wire to the electrical connector of the adjoining gum it)038] The pressure switch is secured in the pin end cap by a pressure switch retaining seal which is secured to the inside of the pressure switch opening of the pin: end cap, and flares outward from the olectrieal connector of the pressure switch to enclose the cylinder Which supports the clips on the box end cap. The pressure .switch retaining seal is compressible, so it will seal between the adjoining guns upon assembly to guide the blast force from one gun to the pressure switch of the next gun.
I00391 The plurality of guns may be assembled and tested in a more desirable environment, and secured by thread protectors for shipment to the drilling site. On site, the alignment screw is removed from the pin end and the charge carrier is partially withdrawn. from the p.m body casing to allow the detonator to be wired to the pressure switch. The charge carrier is then reinserted and aligned by the alignment screw.
EOM] Once aligned, screwing the pipe threading of the pin and box ends of the guns together forces the electrical contact of the pressure switch in one gun to connect to the clips in the box end connector of the adjacent gun, and the pressure switch retaining seal deforms as the step ring of the pin end cap is secured between the shoulder at the bottom of the box, and the end of the pin, thus completing the connections.
100411 Should disassembly be required, unscrewing the pipe thread would pull the electrical contact of the pressure switch from the clips of the adjoining gun. The pressure switch retaining seal inay return to shape, or possibly require replacement depending on the easticit of the construction material. At this point the thread protectors on be replaced and/or the detonator may need to be removed.
DETAILED DESCRIPTION OF THE DRAWINGS
[00421 The following is a detailed description of exemplary embodiments to illustrate the principles of the invention. The ethbodiments are provided to illustrate aspects of the innovation, bat the, invention is not limited to any embodiment. As those skilled'in the art will appreciate, the scope of the invention encompasses numerous alternatives, modifications, and equivalent.
100431 FIG, I is a cross-section of all assembly of multiple armed and assembled guns in a manner that is utilized in the industry. The perf assembly (1) has a firing head (2), a plurality of perforating guns (3), each containing a charge carrier, two tandem subs (4), and a bottom sub (3).
in such a configuration, the tandem subs (4) may contain access ports (6) for accessing internal wiring during assembly, [00441 FIG. 2 shows a cross section of a single gun joined on each end to an adjacent gun. hi the example shown, a tandem sub assembly is associate with each gun, as is standard in the industry.
The gun (3) comprises a charge carrier (13) with a plurality of explosive shape charges (16) joined by a detonation cord or fuse (19). The charge carrier (13) is supported, substantially centered, within the gun body casing (12) by an insniating top end (14) and an isolating bottom end (15) The top and bottom ends of the charge cattier may be one of several configurations.
some of which are described in the applicant's other innovation descriptions incorporated above.
The specifics of the top and bottom ends are not significant to the innovation described in this specific application.
100451 One can see in the interior of the carrier (13) that the shaped charges (16) are shown set in radial fashion petpendicular to the gun wall, to the carrier, and, when the guns are within the well, to the well casing: in the illustration, six shape charges are illustrated, but the actual number and orientation will vary, [0046] The shaped charges arc explosives set in such a manner that they concentrate the force of the explosion outward, generating ajet of gas (plasma) at high pressure and temperature, that pulls the metal, from the interior of the charge and prgjects it outward until. it arrives at the well formation; with this action, the charges produce a perforating effect that is variable in proportion to the potency of the charges. It is well known practice to scallop the gun body easing to reduce the force necessary to pierce the casing at the desired location, and so that burrs formed from the perforation do not damage the walls of the well during later extraction of the, gun after firing.
10047l hi each intermediate Joint or intermediate sub or tandem sub (4) one can see the pressure activated changeover switch (17) retWred to as the pressure switch, from which wires extend to the rest of the assembly. When the detonator is activated, a detonation is propagated by way of a "fuse .. or detonating cord (19) .. to each of the shaped charges in the carrier (13) that burst in simultaneous fashion within the corresponding gun (3).
[0048] FIG. $ shows a cross section of an intermediate 61,lb coutaiti.ing a pressure switch joining two adjacent guns with pass through wiring. The gun body casing (12) of each gun has a box.
end with the charge carrier (13) terminated by a .end cap (400) and secured in the gun body casing (12) by a snap ring. (600). The intermediate sub (4) has two pin ends, a pass through .opening for Wiring, and the option of inserting. a pressure switch (12) at either end to ensure it is dose to the .anticipated 'blast direction_ In the left side gun, a spring-loaded connector pin. (500) .eontacts the electrical contact of the pressure switch (17), which is held M
the tandem sub (4) which was previously wired (IF and G) to the adjoining gun..
[0049] FIG, 4 shows: a cross section of a itmetion of two pelf guns by an insulating contact pin.
contained within an intermediate sub. The insulating contact pin (610) is also known as a propagator. The purpose is to connect the fire signal wire between the two guns across the intermediate sub or tandem :sub (4), The propagator (MO) connects to the insulating contact pins (500) of either :gun's charge earrier (1.3). The charger canier (13) is centred in the gun body easing. (1..2)..by a connector end cap (400) and. secured by a snap ring (00), The purpose is W
electrically connect the fire signal wires (F, not shown). of the two guns, and without the potential.
to exert excess force on the .pressure switch (17, not shown), possibly prematurely- triggering it and thus disarming the lower guns.
[0050] FIG. 5 shows a.cross section of a. reduced intermediate -sub joining two adjacent guns.
'The reduced intermediate sub MO) has pin pipe connections at both ends and is joining two adjacent gun casings (12) With box pipe connections at both a.djoining ends.
This .configuration.
utilizes a specialized end cap (700) on the letl charge carrier (1,3) which has an opening for a pressure switch (17), The pressure switch (17) is wired to the left gun then secured to the end cap (700) by threading (940) the intermediate sub (900). 0-rings (950) help to seal the joint.
The right gun case (12) has a Charge carrier (13) ending in another specialized end cap (400) which accommodates a spring-loaded insulated pin (500) which mates with the pressure switch (17) when threaded to the opposite end of the intermediate sub (900).
l0051l FIG. 6A. shows a perspective view of a pin end cap, in accordance with an exemplary embodiment of the invention. FM. 6B shows a cross section of the pin end cap from FIG 6A.
FIG. 6C shows an end view of the pin end cap from FIG 6.A as viewed from the gin end of the gun.
1.00521 The pin end cap (1100) has an inner face (1110) oriented toward the charge carrier (13, not illustrated), and a distal outer face (1120) oriented toward the adjoining gun. The outer end's diameter has a plurality of recesses (1130) for 0-rings Which seal against the interior surface of the corresponding gun body casingõk step ring (1140) is larger than the interior of the gun body casing, but small enough to slide into, and bottom against the interior shoulder of the threaded box end of the adjoining gun..
[00531 The pin end cap (1100) is secured to the interior surface of the pin end of the gun body casing with an alignment screw (1150) which also serves to align the shape charges of the charge.
carrier with the scallops on the exterior surface of the gun body casing. The charge carrier secured to the pin end cap (1100) by screws through the carrier sidewalls oriented into the screw holes (1145) on the pin end cap. A pass through (1160) along the axis of the pin end cap (1100) allows the pressure switch (17, not shown) to be inserted through the outer face (1120) with the wires extending into the charge carrier to connect with the detonator (19, not shown). The outer face (1120) may be recessed and/or may have screw holes, or other connection points for support of legacy systems.
[0054l FIG. 7A shows a perspective view of a. box end cap as viewed from the box end of the gun, in accordance with an exemplary embodiment of the invention. FIG. 7B
shows a perspective view of the box end. cap from FIG. 7A as viewed from the reverse angle. FIG. 7C
shows a cross section of the box end cap from FIG:. 7A.
(0055] The box end cap (1200) is a circular disk with an inner side (12)0) and an outer face (1220). A charge carrier mating surface (1.240) is a cylinder extending from the inner C.
(121.0), and containing two screw holes (1245) .for securing the charge carrier, The outer edge (1230) of the box end cap (1200) thrills a second larger diameter cylinder, to center the charge carrier within the gun body casing.
[0056] The external side of the box end cap extends outward in .a cylinder (1250). which supports one or more spring tabs of an electrical connector illustrated below which is secured to the box end cap through a screw hold (1260), [00571 FIG. SA shows a. perspective view of a pressure switch retainer seal, in accordance with an exemplary embodiment of the invention. FIG. 813 shows a cross section of the pressure switch. retainer seal from FIG 8A, 10058] The pressure switch retainer seal (1300) has a retainer end (1310) which surrounds the electrical contact of the pressure switch and hold it into the pin end cap's pass through (1160) by a plurality of friction rings (1320). The pressure guide end (1330) of the pressure switch retainer seal (1300) has a mating surface (1340) which contacts against the outer surface (122(l) of the box end cap (1250) and encompasses the cylinder (1250) supporting the electrical clips (1450), [0059] FIG. 9A shows a perspective view of an electrical insert to the box end cap .from FIG 7.A, in accordance with an exemplary embodiment of the invention. Fla 913 shows a.
cross section of the electrical insert from PIO, 9A and its orientation/assembly with the box end. cap from FIG
7A.
(04160] The electrical insert (1400) has a. cylindrical mass 0410) which S
electrically conductive and provides structural support. Two opposing spring clips (1450) have conductive ends (1459) which mate with the mass (1410) through two opposed holes (1420). The clips (1.45(1) are oriented by retainer sections (1457) 'between the mass (1410) and the box end cap (1200) into the clip support ring (1250) where the ends are curved back upon themselves to provide a spring connection (1455), The electrical components are then secured to the box end cap by a screw (1440) pass* through the end cap hole (1260) and the mass (1410) to the fire signal wire (I19 and secured with a retaining nut (1445), 10061 FIG, 10 shows a cross section of a single gun with the pin end caps and box end caps, in accordance with an exemplary embodiment of the invention, The charge carrier (1.3) with the shape charges (16) terminates at the box end (2.5) of the gun casing body (12, not labeled) with the box end cap (1200) and its electrical insert 1400) carrying the fire signal wire (F., not labeled).
100621 At the distal end, the pin end (27) of the gun casing body (12, not labeled), the detonator (19) connects to the pressure switch (17) held into the pin end cap (1100) by the pressure switch retainer seal (1300). The alignment screw (1150) ensure the shape charges (16) are oriented correctly in respect to the scallops in the exterior surface of the gun body casing (12, not labeled), 100631 FIG. 1 I shows a cross section close -sup of adjacent guns with pip and box :connection, joined and configured for discharge through direct connection of one gun to the adjacent gun in accordance with. an exemplary embodiment of the invention.
100641 The diagrams in accordance with exemplary embodiments of the present invention are provided as e-xatnples and should not be construed to limit other embodiments within the scope of the invention. For instance, heights, widths, and thicknesses may not be to scale and should not be construed to limit the invention to the proportions illustrated.
Additionally, some elements illustrated in the singularity may be implemented in a plurality.
Sonic element illustrated in the plurality could vary in count. Sonic elements illustrated in one form could vary in detail and should be interpreted as illustrative for discussing exemplary etribodiments. Such specific information is not provided to limit the invention.
100651 The above diScUsSion is Meant to be illustrative Of the principles and variotts, embodiments of the present invention. Numerous' variations and modifications will become apparent to those skilled in the art once the above disclosure is hilly appreciated. It is intended that the following claims be interpreted to embrace all such variations and modifications.
Claims (8)
1. .A gt.in assembly for perti.tratitn4 wells comprising:
at lea.st one gun having a gun body easing, the easing being a hollow cylinder, 3 with a box fitting at one end, and a modified pin fitting at the distal end;
4 the modified pin fitting comprising a length (Aexternal thread shorter than the leng.th of intermd thread located in the box. Intim, and ¨
the pin -fitting having an alignment point for accepting an alignment pin;
7 a charge cattier, the charge carrier being a hollow cylinder, with exterior diameter 8 less than the interior diameter of the gun casing;
9 a pin. end cap secured to the pin end of the charge carrier and extending the charge I O carrier to a.. length approximately equal to the length of the easing, and secwing the 1 charge carrier to the casing;
2 the pin end cap further having a cylindrical central opening passing through the 13 end cap thr receiving a pressure switch secured in the central wening of the pin. end cap;
14 a plurality of shape charges inside the charge carrier, the charges disposed radially 15 toward the external circumference and inter connected by a detonator cord;
15 the detonator cord connecting with a detonation circuit within the charge carrier;
1.7 a plurality of scalloped recesses in the gun body casing adjacent to, and aligned I 8 with each of the plurality of shape charges;
19 an alignment pin securing the Charge carrier within the gun body casing snch that 20 the radially positioned shape charges are aligned with the scalloped ro,cesso in the gun body.
The gun assembly of claim I wherein the gan further comprises:
2 a box end cap, scoured to the box fitting end af the charge Carrier, having an exterior laìurter substantially equal to the interior diameter affix easing;
4 the box clad cap having an edge extending to Cine side of the external diameter of the box end cap, and biased outward from the central was. to stthstantially center the 6 charge carrier within the gun casing.
1 3.'The gun assembly of claim .2: wherein the hox end cap thrther comprises:
at lea.st one gun having a gun body easing, the easing being a hollow cylinder, 3 with a box fitting at one end, and a modified pin fitting at the distal end;
4 the modified pin fitting comprising a length (Aexternal thread shorter than the leng.th of intermd thread located in the box. Intim, and ¨
the pin -fitting having an alignment point for accepting an alignment pin;
7 a charge cattier, the charge carrier being a hollow cylinder, with exterior diameter 8 less than the interior diameter of the gun casing;
9 a pin. end cap secured to the pin end of the charge carrier and extending the charge I O carrier to a.. length approximately equal to the length of the easing, and secwing the 1 charge carrier to the casing;
2 the pin end cap further having a cylindrical central opening passing through the 13 end cap thr receiving a pressure switch secured in the central wening of the pin. end cap;
14 a plurality of shape charges inside the charge carrier, the charges disposed radially 15 toward the external circumference and inter connected by a detonator cord;
15 the detonator cord connecting with a detonation circuit within the charge carrier;
1.7 a plurality of scalloped recesses in the gun body casing adjacent to, and aligned I 8 with each of the plurality of shape charges;
19 an alignment pin securing the Charge carrier within the gun body casing snch that 20 the radially positioned shape charges are aligned with the scalloped ro,cesso in the gun body.
The gun assembly of claim I wherein the gan further comprises:
2 a box end cap, scoured to the box fitting end af the charge Carrier, having an exterior laìurter substantially equal to the interior diameter affix easing;
4 the box clad cap having an edge extending to Cine side of the external diameter of the box end cap, and biased outward from the central was. to stthstantially center the 6 charge carrier within the gun casing.
1 3.'The gun assembly of claim .2: wherein the hox end cap thrther comprises:
2 an electrical cormection point extending from the center of the box end cap's
3 external side;
4 the connection point being electrically:isolated from the gun casing and from the charge carrier; and 6 a charge wire connected from the electrical connection point, extending through 7 the charge carrier, propagating any electrical sigoial from the electrical connection point 8 to a detonation circuit within the charge carrier.
The gun assembly of claim 3 mthetein the electrical Cfmmection point of the box end cap is electrically cormected to the firing circuit for remotely detonating one or more guns
The gun assembly of claim 3 mthetein the electrical Cfmmection point of the box end cap is electrically cormected to the firing circuit for remotely detonating one or more guns
5. The gun assembly of claim I wherein the pin end cap further comprises:
a first diameter less than the charge carriees lower end, 3 the end cap secured thereto;
4 a. second diameter larger than the charge carrier, and smaller than the internal cylinder of the pin end of the gun ca.sing;
a first diameter less than the charge carriees lower end, 3 the end cap secured thereto;
4 a. second diameter larger than the charge carrier, and smaller than the internal cylinder of the pin end of the gun ca.sing;
6 a third diameter larger than the internal cylinder of the pin end of the gun casing,
7 and smaller than the diameter of the internal thread of the box fitting, 8 wherein the third diameter is captured between the end of the pin fitting of 9 the gun casing, and the interidr edge df the box fitting of a mated gun casing;
I O a fOtiirth diameter fitting into the gun casing adjacent to the box fitting, 11 the fburth diameter having at least two grooves: for 0-rings around the 12 circumference, the 0-rings mating agaigst the:interior cylinder of a mated gun casing.
6. The gun assembly of claim I wherein the pin end cap further comprises the. second 2.. diameter having an alignment point fi-g accepting an alignment pen passing through the 3 .alignment point of the pin end of the gun casing.
1 7. The gun asaembly ttf claim I wherein the pressure .switch is Seeured in the central 2 opening of the pin end cap with a retainer seal such tixa the pressure switch's contact pin 3 extends through the seat and is surrounded by a pressure guide directing Mast pressure 4 fri.)m a mated gun to the cOntact pin.
I O a fOtiirth diameter fitting into the gun casing adjacent to the box fitting, 11 the fburth diameter having at least two grooves: for 0-rings around the 12 circumference, the 0-rings mating agaigst the:interior cylinder of a mated gun casing.
6. The gun assembly of claim I wherein the pin end cap further comprises the. second 2.. diameter having an alignment point fi-g accepting an alignment pen passing through the 3 .alignment point of the pin end of the gun casing.
1 7. The gun asaembly ttf claim I wherein the pressure .switch is Seeured in the central 2 opening of the pin end cap with a retainer seal such tixa the pressure switch's contact pin 3 extends through the seat and is surrounded by a pressure guide directing Mast pressure 4 fri.)m a mated gun to the cOntact pin.
8. The gun a.ssembly of claim 1 Mierein .the gun assembly is comprised of connecting a first gun, of the at least on.e gait, to a second gun, of the at least one 3 gun;
4 by niating the external threads of the pin end of the first gun to the internal threads of the box end of the second gun.
The gun assembly of clahn 7 wherein the mating uf the guns electrically connects the pressure .switch contact pin of the first gun an electrical connection point of a box end cap of the second gun.
1.
4 by niating the external threads of the pin end of the first gun to the internal threads of the box end of the second gun.
The gun assembly of clahn 7 wherein the mating uf the guns electrically connects the pressure .switch contact pin of the first gun an electrical connection point of a box end cap of the second gun.
1.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US15/881,084 | 2018-01-26 | ||
| US15/881,084 US20190234188A1 (en) | 2018-01-26 | 2018-01-26 | Direct Connecting Gun Assemblies for Drilling Well Perforations |
| PCT/US2018/068087 WO2019147385A1 (en) | 2018-01-26 | 2018-12-30 | Direct connecting gun assemblies for drilling well perforations |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA3089193A1 true CA3089193A1 (en) | 2019-08-01 |
Family
ID=67392785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA3089193A Abandoned CA3089193A1 (en) | 2018-01-26 | 2018-12-30 | Direct connecting gun assemblies for drilling well perforations |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20190234188A1 (en) |
| CA (1) | CA3089193A1 (en) |
| WO (1) | WO2019147385A1 (en) |
Families Citing this family (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9702680B2 (en) | 2013-07-18 | 2017-07-11 | Dynaenergetics Gmbh & Co. Kg | Perforation gun components and system |
| US11293736B2 (en) | 2015-03-18 | 2022-04-05 | DynaEnergetics Europe GmbH | Electrical connector |
| US9784549B2 (en) | 2015-03-18 | 2017-10-10 | Dynaenergetics Gmbh & Co. Kg | Bulkhead assembly having a pivotable electric contact component and integrated ground apparatus |
| US10914145B2 (en) | 2019-04-01 | 2021-02-09 | PerfX Wireline Services, LLC | Bulkhead assembly for a tandem sub, and an improved tandem sub |
| US10458213B1 (en) | 2018-07-17 | 2019-10-29 | Dynaenergetics Gmbh & Co. Kg | Positioning device for shaped charges in a perforating gun module |
| US10386168B1 (en) | 2018-06-11 | 2019-08-20 | Dynaenergetics Gmbh & Co. Kg | Conductive detonating cord for perforating gun |
| USD903064S1 (en) | 2020-03-31 | 2020-11-24 | DynaEnergetics Europe GmbH | Alignment sub |
| USD921858S1 (en) * | 2019-02-11 | 2021-06-08 | DynaEnergetics Europe GmbH | Perforating gun and alignment assembly |
| US11339614B2 (en) | 2020-03-31 | 2022-05-24 | DynaEnergetics Europe GmbH | Alignment sub and orienting sub adapter |
| USD1019709S1 (en) | 2019-02-11 | 2024-03-26 | DynaEnergetics Europe GmbH | Charge holder |
| USD1010758S1 (en) | 2019-02-11 | 2024-01-09 | DynaEnergetics Europe GmbH | Gun body |
| US11697980B2 (en) * | 2019-02-26 | 2023-07-11 | Sergio F Goyeneche | Apparatus and method for electromechanically connecting a plurality of guns for well perforation |
| US11940261B2 (en) | 2019-05-09 | 2024-03-26 | XConnect, LLC | Bulkhead for a perforating gun assembly |
| US11828143B2 (en) * | 2019-09-27 | 2023-11-28 | Steel Dog Industries Inc. | Devices for a perforating gun |
| US11215041B2 (en) | 2019-12-10 | 2022-01-04 | G&H Diversified Manufacturing Lp | Modular perforating gun systems and methods |
| WO2021185749A1 (en) * | 2020-03-16 | 2021-09-23 | DynaEnergetics Europe GmbH | Tandem seal adapter with integrated tracer material |
| US11988049B2 (en) | 2020-03-31 | 2024-05-21 | DynaEnergetics Europe GmbH | Alignment sub and perforating gun assembly with alignment sub |
| USD904475S1 (en) * | 2020-04-29 | 2020-12-08 | DynaEnergetics Europe GmbH | Tandem sub |
| USD908754S1 (en) * | 2020-04-30 | 2021-01-26 | DynaEnergetics Europe GmbH | Tandem sub |
| US11098563B1 (en) | 2020-06-25 | 2021-08-24 | Halliburton Energy Services, Inc. | Perforating gun connection system |
| US12000267B2 (en) | 2021-09-24 | 2024-06-04 | DynaEnergetics Europe GmbH | Communication and location system for an autonomous frack system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6851471B2 (en) * | 2003-05-02 | 2005-02-08 | Halliburton Energy Services, Inc. | Perforating gun |
| US7762331B2 (en) * | 2006-12-21 | 2010-07-27 | Schlumberger Technology Corporation | Process for assembling a loading tube |
| US8943943B2 (en) * | 2011-11-11 | 2015-02-03 | Tassaroli S.A. | Explosive carrier end plates for charge-carriers used in perforating guns |
| CA3070118A1 (en) * | 2013-07-18 | 2015-01-18 | Dynaenergetics Gmbh & Co. Kg | Perforation gun components and system |
| PL3108091T3 (en) * | 2014-05-23 | 2020-04-30 | Hunting Titan, Inc. | Box by pin perforating gun system and methods |
| US10273788B2 (en) * | 2014-05-23 | 2019-04-30 | Hunting Titan, Inc. | Box by pin perforating gun system and methods |
| US9115572B1 (en) * | 2015-01-16 | 2015-08-25 | Geodynamics, Inc. | Externally-orientated internally-corrected perforating gun system and method |
| CA2983867A1 (en) * | 2015-05-15 | 2016-11-24 | Sergio F. Goyeneche | Apparatus for electromechanically connecting a plurality of guns for well perforation |
| US10174595B2 (en) * | 2015-10-23 | 2019-01-08 | G&H Diversified Manufacturing Lp | Perforating tool |
| WO2017192604A1 (en) * | 2016-05-02 | 2017-11-09 | Hunting Titan, Inc. | Pressure activated selective perforating switch support |
| CA3032008C (en) * | 2016-08-02 | 2022-05-17 | Hunting Titan, Inc. | Box by pin perforating gun system |
| US10161733B2 (en) * | 2017-04-18 | 2018-12-25 | Dynaenergetics Gmbh & Co. Kg | Pressure bulkhead structure with integrated selective electronic switch circuitry, pressure-isolating enclosure containing such selective electronic switch circuitry, and methods of making such |
-
2018
- 2018-01-26 US US15/881,084 patent/US20190234188A1/en not_active Abandoned
- 2018-12-30 WO PCT/US2018/068087 patent/WO2019147385A1/en active Application Filing
- 2018-12-30 CA CA3089193A patent/CA3089193A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| US20190234188A1 (en) | 2019-08-01 |
| WO2019147385A1 (en) | 2019-08-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |
Effective date: 20230630 |