Modular perforating gun systems and methods

1. A perforating gun deployable in a wellbore, comprising:

an outer sleeve comprising a central passage; and

a plurality of separate perforating modules receivable in the central passage of the outer sleeve, wherein each of the plurality of perforating modules comprises a carrier and a charge tube assembly received in the carrier, wherein the charge tube assembly comprises a shaped charge received in an interior of the charge tube assembly and configured to produce an explosive jet extending radially outwards from the shaped charge and through the carrier and the outer sleeve;

wherein the carrier of each of the plurality of perforating modules comprises a radial lock and a radial receptacle, wherein the radial lock of a first of the plurality of perforating modules is receivable in the radial receptacle of a second of the plurality of perforating modules to rotationally lock the first of the plurality of perforating modules with the second of the plurality of perforating modules.

2. The perforating gun of claim 1 , wherein the charge tube assembly of each of the plurality of perforating modules comprises an individually addressable switch assembly configured to selectably fire the shaped charge.

3. The perforating gun of claim 2 , wherein the charge tube assembly of each of the plurality of perforating modules comprises a charge tube receiving the shaped charge, a first endplate coupled to a first end of the charge tube, and a second endplate coupled to the second end of the charge tube, wherein the switch assembly is coupled to the second endplate.

4. The perforating gun of claim 3 , wherein the second endplate of the charge tube assembly of each of the plurality of perforating modules comprises a detonator holder comprising a receptacle which receives a detonator coupled to the switch assembly, wherein the detonator extends into the charge tube.

5. The perforating gun of claim 1 , further comprising:

a first pressure bulkhead receivable in the outer sleeve and connectable to a first of the plurality of perforating modules, wherein the first pressure bulkhead is configured to electrically connect to the first of the plurality of perforating modules when the first pressure bulkhead is connected to the first of the plurality of perforating modules; and

a second pressure bulkhead receivable in the outer sleeve and connectable to a second of the plurality of perforating modules, wherein the second pressure bulkhead is configured to electrically connect to the second of the plurality of perforating modules when the second pressure bulkhead is connected to the second of the plurality of perforating modules.

6. The perforating gun of claim 1 , wherein the plurality of perforating modules are each isolated from a load path extending from a first end of the outer sleeve to a second end of the outer sleeve, the load path being associated with an axially directed compressive or tensile load applied to the first end or the second end of the outer sleeve.

7. A perforating gun deployable in a wellbore, comprising:

an outer sleeve comprising a central passage; and

a plurality of separate perforating modules receivable in the central passage of the outer sleeve, wherein each of the plurality of perforating modules comprises a carrier and a charge tube assembly received in the carrier, wherein the charge tube assembly comprises a shaped charge received in an interior of the charge tube assembly and configured to produce an explosive jet extending radially outwards from the shaped charge and through the carrier and the outer sleeve;

wherein the charge tube assembly of each of the plurality of perforating modules comprises an individually addressable switch assembly configured to selectably fire the shaped charge;

wherein the charge tube assembly of each of the plurality of perforating modules comprises a charge tube receiving the shaped charge, a first endplate coupled to a first end of the charge tube, and a second endplate coupled to the second end of the charge tube, wherein the switch assembly is coupled to the second endplate, and wherein the second endplate of the charge tube assembly of each of the plurality of perforating modules comprises a detonator holder comprising a receptacle which receives a detonator coupled to the switch assembly, wherein the detonator extends into the charge tube;

wherein the second endplate of the charge tube assembly of each of the plurality of perforating modules comprises a detonator cord receptacle which receives a detonator cord ballistically coupling the detonator with the shaped charge, and a wiring harness electrically connected to an electrical connector assembly of the first endplate, an electrical connector assembly of the second endplate, and to the switch assembly.

8. A perforating gun deployable in a wellbore, comprising:

an outer sleeve comprising a central passage; and

a plurality of separate perforating modules receivable in the central passage of the outer sleeve, wherein each of the plurality of perforating modules comprises a shaped charge and an individually addressable electrical switch assembly configured to selectably fire the shaped charge in response to receiving a firing signal addressed to the electrical switch assembly;

wherein each of the plurality of perforating modules comprises a carrier and a charge tube assembly received in the carrier, wherein the charge tube assembly comprises the shaped charge, and wherein the charge tube assembly of each of the plurality of perforating modules comprises a charge tube receiving the shaped charge, a first endplate coupled to a first end of the charge tube, and a second endplate coupled to the second end of the charge tube, wherein the electrical switch assembly is coupled to the second endplate;

wherein the second endplate of the charge tube assembly of each of the plurality of perforating modules comprises a detonator holder comprising a receptacle which receives a detonator coupled to the electrical switch assembly, wherein the detonator extends into the charge tube;

wherein the second endplate of the charge tube assembly of each of the plurality of perforating modules comprises a detonator cord receptacle which receives a detonator cord ballistically coupling the detonator with the shaped charge, and a wiring harness electrically connected to an electrical connector assembly of the first endplate, an electrical connector assembly of the second endplate, and to the electrical switch assembly.

9. The perforating gun of claim 8 , wherein the plurality of perforating modules are rotationally locked together.

10. A perforating gun deployable in a wellbore, comprising:

an outer sleeve composing a central passage; and

a plurality of separate perforating modules receivable in the central passage of the outer sleeve, wherein each of the plurality of perforating modules comprises a shaped charge and an individually addressable electrical switch assembly configured to selectably fire the shaped charge in response to receiving a firing signal addressed to the electrical switch assembly;

wherein each of the plurality of perforating modules comprises a carrier which comprises a radial lock and a radial receptacle, wherein the radial lock of a first of the plurality of perforating modules is receivable in the radial receptacle of a second of the plurality of perforating modules to rotationally lock the first of the plurality of perforating modules with the second of the plurality of perforating modules.

11. The perforating gun of claim 10 , further comprising:

a first pressure bulkhead receivable in the outer sleeve and connectable to a first of the plurality of perforating modules, wherein the first pressure bulkhead is configured to electrically connect to the first of the plurality of perforating modules when the first pressure bulkhead is connected to the first of the plurality of perforating modules; and

a second pressure bulkhead receivable in the outer sleeve and connectable to a second of the plurality of perforating modules, wherein the second pressure bulkhead is configured to electrically connect to the second of the plurality of perforating modules when the second pressure bulkhead is connected to the second of the plurality of perforating modules.

12. The perforating gun of claim 10 , wherein the perforating module is isolated from a load path extending from a first end of the outer sleeve to a second end of the outer sleeve, the load path being associated with an axially directed compressive or tensile load applied to the first end or the second end of the outer sleeve.