Fullbore firing heads including attached explosive automatic release

Patent metadata

Field	Value
Publication number	US-10519754-B2
Application number	US-201615371608-A
Country	US
Kind code	B2
Filing date	Dec 7, 2016
Priority date	Dec 17, 2015
Publication date	Dec 31, 2019
Grant date	Dec 31, 2019

Abstract

Embodiments of the present disclosure may provide a perforation tool and method for operating the perforation tool. The perforation tool may include one or more firing heads and one or more gun assemblies. The perforation tool may also include a release mechanism coupled to the one or more firing head and the one or more gun assemblies. The release mechanism may release the one or more gun assemblies to a bottom of a wellbore upon firing of the one or more gun assemblies and maintain the one or more firing heads on the perforation tool.

First claim

What is claimed is:

1. A perforation tool, comprising:
a firing head;
a gun assembly;
a release mechanism coupled to the firing head and the gun assembly, wherein the release mechanism is configured to release the gun assembly to a bottom of a wellbore upon firing of the gun assembly and maintain the firing head on the perforation tool;
a first detonation tube coupled to the firing head; and
a second detonation tube coupled to the first detonation tube and the gun assembly, wherein the second detonation tube is released to the bottom of the wellbore with the gun assembly by the release mechanism and the first detonation tube remain on the perforation tool.

2. The perforation tool of claim 1 , further comprising:
a mandrel comprising a slot on an external surface of the mandrel, wherein the firing head is positioned in the slot.

3. The perforation tool of claim 1 , further comprising:
a release housing coupled to the gun assembly, wherein the release mechanism is positioned within the release housing.

4. The perforation tool of claim 1 , wherein the second detonation tube is stabbed into the first detonation tube.

5. The perforation tool of claim 1 , wherein the first detonation tube and the second detonation tube provides a ballistic path between the firing head and the gun assembly.

6. The perforation tool of claim 1 , wherein the release mechanism comprises:
a shoulder;
a collet finger coupled to the gun assembly and configured to engage the shoulder;
a sleeve comprising a release pin;
a release piston configured to hold the release pin in a locked position against the collet finger to engage the collet finger with the shoulder; and
a break plug coupled to the release piston and configured to secure the release piston in the locked position.

7. The perforation tool of claim 6 , wherein the break plug is configured to dislodge upon firing of the gun assembly and cause the release piston to release the release pin.

8. The perforation tool of claim 1 , further comprising:
an additional firing head, wherein the release mechanism is configured to release the additional firing head to the bottom of the wellbore upon firing of the gun assembly.

9. A tool for performing perforation operations in a wellbore, comprising:
a mandrel;
a firing head coupled to an external surface of the mandrel;
a release housing coupled to a lower end of the mandrel;
a release mechanism housed with the release housing;
a gun assembly coupled to the release mechanism, wherein the release mechanism is configured to release the gun assembly to a bottom of a wellbore upon firing of the gun assembly and maintain the firing head on the mandrel;
a first detonation tube coupled to the firing head; and
a second detonation tube coupled to the first detonation tube and the gun assembly, wherein the second detonation tube is released to the bottom of the wellbore with the gun assembly by the release mechanism and the first detonation tube remains on the perforation tool.

10. The tool of claim 9 , further comprising:
a delivery system coupled to an upper end of the mandrel, wherein the delivery system moves the mandrel within the wellbore.

11. The tool of claim 9 , wherein the mandrel comprises a slot on the external surface of the mandrel, and wherein the firing head is positioned in the slot.

12. The tool of claim 9 , wherein the second detonation tube is stabbed into the first detonation tube.

13. The tool of claim 9 , wherein the first detonation tube and the second detonation tube provide a ballistic path between the firing head and the gun assembly.

14. The tool of claim 9 , wherein the release mechanism comprises:
a shoulder;
a collet finger coupled to the gun assembly and configured to engage the shoulder;
a sleeve comprising a release pin;
a release piston configured to hold the release pin in a locked position against the collet finger to engage the collet finger with the shoulder; and
a break plug coupled to the release piston and configured to secure the release piston in the locked position.

15. The tool of claim 14 , wherein the break plug is configured to dislodge upon firing of the gun assembly and cause the release piston to release the release pin.

16. The tool of claim 9 , further comprising:
an additional firing head, wherein the release mechanism is configured to release the additional firing head to the bottom of the wellbore upon firing of the gun assembly.

17. The tool of claim 16 , further comprising:
an additional detonation tube coupled to the additional firing head and the gun assembly, wherein the additional detonation tube provides a ballistic path between the additional firing head and the gun assembly.

18. A method for performing perforation operations in a wellbore, the method comprising:
positioning a perforation tool in the wellbore, the perforation tool comprising:
a firing head,
a gun assembly,
a release mechanism coupled to the firing head and the gun assembly;
a first detonation tube coupled to the firing head; and
a second detonation tube coupled to the first detonation tube and the gun assembly, wherein the second detonation tube is released to the bottom of the wellbore with the gun assembly by the release mechanism and the first detonation tube remains on the perforation tool; and

activating the firing head to fire the gun assembly, wherein the release mechanism is configured to release the gun assembly to a bottom of the wellbore upon firing of the gun assembly and maintain the firing head on the perforation tool.

Assignees

• Schlumberger Technology Corp

Inventors

• Prisbell Andrew
• Mehdi Mohamed
• Sarvari Christopher
• Ghosh Indranil
• Escudero Jose

Classifications

• F42D1/08

  Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor · CPC title

• E21B43/116 Primary

  Gun or shaped-charge perforators · CPC title