# US 2019/0376775 A1 · Conductive detonating cord for perforating gun > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0376775 A1 - Document ID: US20190376775A1 - Status: Published application - Kind: A1 - Application number: 16/503,839 - Filed: 2019-07-05 - Published: 2019-12-12 - Earliest claimed: 2018-06-11 - Assignees: DynaEnergetics GmbH & Co. KG - Applicants: DynaEnergetics GmbH & Co. KG - Inventors: Frank Haron Preiss; Liam McNelis; Thilo Scharf; Christian Eitschberger; Bernhard Scharfenort - Web page: https://patentgrep.com/patent/US20190376775A1 ## CPC - E21B 43/119: Details, e.g. for locating perforating place or direction - C06C 5/04: Detonating fuses - E21B 43/1185: Ignition systems - F42B 1/02: Shaped or hollow charges (blasting cartridges with cavities in the charge F42B3/08; oil winning using shaped-charge perforators E21B43/116) - F42C 19/12: electric - F42D 1/043: {Connectors for detonating cords and ignition tubes, e.g. Nonel tubes (mounting of detonators in blasting cartridges F42B3/26)} - F42D 1/055: specially adapted for firing multiple charges with a time delay - E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS - C06C: DETONATING OR PRIMING DEVICES; FUSES (ammunition fuzes F42C); CHEMICAL LIGHTERS; PYROPHORIC COMPOSITIONS - F42B: EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION (explosive compositions C06B; fuzes F42C; blasting F42D) - F42C: AMMUNITION FUZES (blasting cartridge initiators F42B3/10; chemical aspects C06C); ARMING OR SAFETY MEANS THEREFOR (filling fuzes F42B33/02; fitting or extracting primers in or from fuzes F42B33/04; containers for fuzes F42B39/30) - F42D: BLASTING (fuses, e.g. fuse cords, C06C5/00; {for obtaining fluid from wells E21B43/00; for mining or quarrying E21C37/00; for making tunnels or galleries E21D9/006}; cartridges F42B3/00) ## Abstract A detonating cord for using in a perforating gun includes an explosive layer and an electrically conductive layer extending around the explosive layer. The electrically conductive layer is configured to relay a communication signal along a length of the detonating cord. In an embodiment, a protective jacket extends around the electrically conductive layer of the detonating cord. The detonating cord may be assembled in a perforating gun to relay a communication signal from a top connector to a bottom connector of the perforating gun, and to propagate a detonating explosive stimulus along its length to initiate shaped charges of the perforating gun. A plurality of perforating guns, including the detonating cord, may be connected in series, with the detonating cord of a first perforating gun in communication with the detonating cord of a second perforating gun. ## Claims ### Claim 1 A perforating gun comprising: a first contact; a second contact; a shaped charge arranged between the first contact and the second contact; and a detonating cord connected to the first contact, the shaped charge and the second contact, wherein the detonating cord comprises: an explosive layer, an electrically conductive layer extending around the explosive layer, and a jacket covering the electrically conductive layer, wherein the detonating cord is configured to relay a communication signal from the first contact to the second contact. ### Claim 2 (depends on 1) The perforation gun of claim 1, further comprising: a detonator electrically coupled to the detonating cord through the first and second contacts, the detonator being configured to initiate the detonating cord. ### Claim 3 (depends on 1) The perforating gun of claim 1, wherein the electrically conductive layer comprises one of an electrically conductive sheath and a plurality of electrically conductive threads. ### Claim 4 (depends on 1) The perforating gun of claim 1, further comprising: an insulating layer extending along a length of the detonating cord between the explosive layer and the electrically conductive layer. ### Claim 5 (depends on 1) The perforating gun of claim 1, wherein the detonating cord electrically connects the first contact to the second contact, the first contact connects to an upstream second contact in an upstream perforating gun, and the second contact connects to a downstream first contact in a downstream perforating gun. ### Claim 6 (depends on 1) The perforation gun of claim 1, wherein the detonating cord is configured to initiate the shaped charge disposed in each charge holder. ### Claim 7 (depends on 1) The perforation gun of claim 1, wherein the first and second contacts engage at least a portion of the electrically conductive layer and are configured to input the communication signal at a first contact portion of the detonating cord and output the communication signal at a second contact portion of the detonating cord. ### Claim 8 (depends on 7) The perforating gun of claim 7, wherein the first contact is secured to the first contact portion and is configured to input the communication signal to the detonating cord; and the second contact is secured to the second contact portion and is configured to output the communication signal from the detonating cord. ### Claim 9 (depends on 1) The perforation gun of claim 1, wherein the first and second contacts comprise at least one of a split sleeve and a conductive pin, wherein at least one of the split sleeve and the conductive pin pierce the jacket to engage the electrically conductive layer. ### Claim 10 (depends on 9) The perforating gun of claim 9, wherein the first and second contacts comprise the conductive pin and the conductive pin comprises: an upper portion; and at least one lower portion extending from the upper portion, wherein the lower portion is configured for engaging the electrically conductive layer. ### Claim 11 (depends on 1) The perforating gun of claim 1, further comprising: a top connector and a bottom connector, wherein the top connector includes the first contact and the bottom connector includes the second contact; and at least one charge holder between the top connector and the bottom connector, wherein the charge holder is configured for holding the shaped charge. ### Claim 12 (depends on 11) The perforation gun of claim 11, further comprising: a wireless detonator arranged in the top connector or the bottom connector, wherein the detonator is energetically and electrically coupled to the detonating cord through the first and second contacts. ### Claim 13 A perforating gun comprising: a top connector; a bottom connector; at least one charge holder between the top connector and the bottom connector, wherein the charge holder is configured for holding a shaped charge; and a detonating cord extending from the top connector to the bottom connector, and connected to the shaped charge, wherein the detonating cord comprises: an explosive layer, an electrically conductive layer extending around the explosive layer, a jacket extending around the electrically conductive layer, a first contact portion configured for receiving a communication signal, and a second contact portion spaced apart from the first contact portion and configured for outputting the communication signal, wherein the detonating cord is configured to transfer the communication signal along a length of the detonating cord to an adjacent perforating gun. ### Claim 14 (depends on 13) The perforation gun of claim 13, further comprising: one or more contacts configured to connect to the electrically conductive layer of the detonating cord, wherein the contacts are configured to input the communication signal at a first contact portion of the detonating cord and output the communication signal at a second contact portion of the detonating cord; and a detonator arranged in the top connector or the bottom connector, wherein the detonator is electrically coupled to the detonating cord through the contacts. ### Claim 15 (depends on 13) The perforating gun of claim 13, further comprising: a first contact positioned in the top connector; and a second contact positioned in the bottom connector, wherein the detonating cord electrically connects the first contact to the second contact, the first contact connects to an upstream second contact in an upstream perforating gun and the second contact connects to a downstream first contact in a downstream perforating gun, and the detonating cord is configured to initiate the shaped charge disposed in each charge holder. ### Claim 16 (depends on 15) The perforating gun of claim 15, further comprising: a tandem seal adapter configured for housing a bulkhead assembly, wherein a first end of the bulkhead assembly is electrically connected to the second contact of the perforating gun, and a second end of the bulkhead assembly is electrically connected to at least one of a first contact housed in a top connector of the adjacent perforating gun and a line-in portion of a detonator of the adjacent perforating gun, wherein the detonating cord is configured to transfer the communication signal through the tandem seal adapter to the adjacent perforating gun. ### Claim 17 (depends on 14) The perforating gun of claim 14, wherein the detonating cord further comprises an insulating layer extending along the length of the detonating cord between the explosive layer and the electrically conductive layer, and the contacts comprise at least one of a split sleeve and a conductive pin, wherein the split sleeve and conductive pin pierce the jacket to engage the electrically conductive layer. ### Claim 18 (depends on 16) The detonating cord of claim 16, wherein the conductive pin comprises: an upper portion; and at least one lower portion extending from the upper portion, wherein the lower portion is configured for engaging the electrically conductive layer. ### Claim 19 A perforating gun comprising: a top connector including a first contact; a bottom connector including a second contact; at least one charge holder between the top connector and the bottom connector, wherein the charge holder is configured for holding a shaped charge; and a detonating cord extending from the top connector to the bottom connector, and connected to the shaped charge, the detonating cord comprising: an explosive layer, an electrically conductive layer extending around the explosive layer, a jacket covering the electrically conductive layer, a first contact portion configured for receiving a communication signal, and a second contact portion spaced apart from the first contact portion and configured for outputting the communication signal, wherein the first and second contacts engage at least a portion of the electrically conductive layer, the first contact being configured to input the communication signal at the first contact portion and the second contact being configured to output the communication signal at the second contact portion such that the detonating cord relays the communication signal from the top connector to the bottom connector. ### Claim 20 (depends on 19) The perforating gun of claim 19, further comprising: an initiator energetically and electrically coupled to the detonating cord through the first contact, wherein the initiator comprises one of an igniter, an RF-safe electronic detonator, a resistorized detonator, and a detonator comprising at least one of an EFI, an EBW and a semiconductor bridge initiator.