Select fire switch form factor system and method

Patent metadata

Field	Value
Publication number	US-11047216-B2
Application number	US-201916449519-A
Country	US
Kind code	B2
Filing date	Jun 24, 2019
Priority date	Feb 20, 2015
Publication date	Jun 29, 2021
Grant date	Jun 29, 2021

Abstract

A wellbore select fire switch retaining member system and method with an integrated through wire and ground wire in a switch sub. The system/method includes a retaining member that has a form factor acceptable by a conventional switch sub. The retaining member incorporates an electrical connection to the center pin of a pressure switch. The system further includes a secondary piston aligned with a piston in the switch (switch piston) so that external pressure is fully acted upon the entire switch piston creating a reliable switch connection. Another system includes an integrated retaining member and switch module having a form factor compatible with existing switch subs. The integrated module inputs include a ground wire and a through wire and the outputs include a ground wire, through wire and an arming wire.

First claim

The invention claimed is:

1. An integrated electronic switch for use with a gun string, the integrated electronic switch comprising:
a body having a first end, a second end, and a body portion extending between the first end and the second end;
a selective electronic switch encapsulated in the body;
an input wire extending from the selective electronic switch through the first end; and
an output electrical member extending from the selective electronic switch through the second end,
wherein the input wire comprises:
a ground wire,
an arming wire, and
a through wire.

2. The switch of claim 1 , wherein the body is cylindrical.

3. The switch of claim 1 , further comprising:
an o-ring seal provided around the body.

4. The switch of claim 1 , further comprising:
a retaining member integrated into the body at the first end of the body.

5. The switch of claim 4 , wherein the retaining member comprises:
a retaining head; and
a threading member for attaching the switch to a switch sub.

6. The switch of claim 1 , wherein the input wire includes plural inputs, a first set of the plural inputs being connected to a sub, a second set of the plural inputs being connected to a perforating gun, and a third set of the plural inputs being connected to the surface.

7. The switch of claim 1 , further comprising:
a pressure switch for sensing a pressure from a downstream perforating gun.

8. The system of claim 1 , wherein the selective electronic switch is pressure isolated within the body.

9. The system of claim 1 , wherein the selective electronic switch is pressure isolated within an isolation chamber located in the body.

10. A system for firing a detonator, the system comprising:
a switch sub for use with a gun string; and
an integrated electronic switch located within the switch sub and configured to work with the gun string,
wherein the integrated electronic switch includes:
a body having a first end, a second end, and a body portion extending between the first end and the second end;
a selective electronic switch encapsulated in the body;
an input wire extending from the selective electronic switch through the first end; and
an output electrical member extending from the selective electronic switch through the second end,
wherein the input wire comprises:
a ground wire,
an arming wire, and
a through wire.

11. The system of claim 10 , wherein the body of the integrated electronic switch is cylindrical.

12. The system of claim 10 , further comprising:
an o-ring provided around the body of the integrated electronic switch.

13. The system of claim 10 , further comprising:
a retaining member integrated at the first end of the body of the integrated electronic switch.

14. The system of claim 13 , wherein the retaining member comprises:
a retaining head; and
a threading member for attaching the switch to the switch sub.

15. The system of claim 10 , wherein the input wire includes plural inputs, a first set of the plural inputs being connected to another switch sub, a second set of the plural inputs being connected to a perforating gun, and a third set of the plural inputs being connected to the surface.

16. The system of claim 10 , further comprising:
a pressure switch for sensing a pressure from a downstream perforating gun.

17. The system of claim 10 , wherein the integrated electronic switch fits inside the switch sub.

18. The system of claim 10 , wherein the selective electronic switch is pressure isolated within the body.

19. The system of claim 10 , wherein the selective electronic switch is pressure isolated within an isolation chamber located in the body.

Assignees

• Geodynamics Inc

Inventors

• Hardesty John T
• Rollins James A

Classifications

• F42B3/00

  Blasting cartridges, i.e. case and explosive (fuse cords, e.g. detonating fuse cords C06C5/00; chemical aspects of detonators, blasting caps or primers C06C7/00) · CPC title

• F42B3/02

  adapted to be united into assemblies · CPC title

• F42D1/04

  Arrangements for ignition {(ignition systems for shaped charge perforators E21B43/1185; ignition devices for seismic energy generators G01V1/06)} · CPC title

• E21B43/1185 Primary

  Ignition systems · CPC title