DISAPPEARING PERFORATING GUN SYSTEM

• US 20130118805A1
• Filed: 08/24/2012
• Published: 05/16/2013
• Est. Priority Date: 09/02/2011
• Status: Active Grant

• Current Assignee: Schlumberger Technology Corporation (Schlumberger NV)
• Original Assignee: Schlumberger Technology Corporation (Schlumberger NV)
• Inventors: Bertoja, Michael J., Moody-Stuart, Alexander, Barykin, Aleksey
• Granted Patent: US 9,695,677 B2
• Time in Patent Office: Days
• US Class Current: 175/2
• CPC Class Codes: E21B 43/116 Gun or shaped-charge perforators
• CPC Class Codes: E21B 43/117 Shaped-charge perforators E21B43/118 takes precedence

Abstract

A system and methodology facilitates creation of perforations along a wellbore. The technique utilizes a perforating gun system having cooperating components, such as a carrier, a loading system, and a plurality of shaped charges. The cooperating components are constructed to break down into multiple smaller pieces upon detonation of the plurality of shaped charges. This allows the perforating gun system to effectively disappear within the wellbore such that any remaining small pieces do not interfere with well flow and/or later interventions.

Claims

1. A system for creating perforations along a wellbore, comprising:

a perforating gun system, comprising;

a plurality of encapsulated shaped charges, each encapsulated shaped charge having a charge case, high explosive, a liner, and a sealing cap;

a carrier to house the plurality of encapsulated shaped charges; and

a loading system to support the plurality of encapsulated shaped charges;

the encapsulated shaped charges, the carrier, and the loading system being reduced to smaller pieces via detonation of the plurality of encapsulated shaped charges.

2. The system as recited in claim 1, wherein components of each encapsulated shaped charge are formed to fracture into smaller pieces upon detonation.

3. The system as recited in claim 2, wherein each charge case and each sealing cap comprises a ceramic material breakable due to the detonation.

4. The system as recited in claim 2, wherein each charge case and each sealing cap comprises a sintered metal material breakable due to the detonation.

5. The system as recited in claim 1, wherein the carrier comprises a dissolvable material.

6. The system as recited in claim 1, wherein the carrier comprises a burnable material.

7. The system as recited in claim 1, wherein the carrier comprises a frangible material which breaks into smaller pieces due to the detonation.

8. The system as recited in claim 1, wherein the carrier comprises a chemically reactive material.

9. The system as recited in claim 1, wherein the loading system comprises a burnable material.

10. The system as recited in claim 1, wherein the loading system comprises a dissolvable material.

11. The system as recited in claim 1, wherein the loading system comprises a dissolvable polymer material.

12. The system as recited in claim 1, wherein at least one of the carrier, the loading system, and the plurality of shaped charges comprises an energetic material.

13. A method of perforating, comprising:

providing a perforating gun system with a carrier, a loading system located within the carrier, and a plurality of shaped charges;

lowering the perforating gun system downhole into a wellbore; and

detonating the plurality of shaped charges in a manner which causes the perforating gun system to disintegrate such that the carrier, the loading system, and the shaped charges are each reduced to smaller pieces .

14. The method as recited in claim 13, further comprising forming a charge case and a sealing cap of each shaped charge from a frangible material.

15. The method as recited in claim 13, further comprising forming the carrier as a frangible carrier of dissolvable material.

16. The method as recited in claim 13, further comprising forming at least one of the loading system, the carrier, and the plurality of shaped charges with an integrated energetic material.

17. The method as recited in claim 13, further comprising forming break patterns with weakened areas along the carrier to control the breakage of the carrier into the smaller pieces upon detonation.

18. A system for perforating downhole, comprising:

a perforating gun system formed of a plurality of cooperating components, the perforating gun system having a plurality of shaped charges, the plurality of cooperating components being constructed to each break down into multiple smaller pieces upon detonation of the plurality of shaped charges

19. The system as recited in claim 18, wherein the plurality of cooperating components comprises a carrier, a loading system, and a plurality of shaped charges.

20. The system as recited in claim 18, where at least some of the cooperating components comprise propellant material subject to activation by the detonation.