Method of fabrication and use of integrated detonators

• US 8,230,788 B2
• Filed: 09/26/2011
• Issued: 07/31/2012
• Est. Priority Date: 11/27/2001
• Status: Expired due to Term

• Current Assignee: Schlumberger Technology Corporation (SLB)
• Original Assignee: Schlumberger Technology Corporation (SLB)
• Inventors: Brooks, James E., Lerche, Nolan C., Veneruso, Anthony Frank
• Primary Examiner(s): DAVID, MICHAEL D
• Application Number:
  US13/245,387
• Publication Number:
  US 20120168226A1
• Time in Patent Office: 309 Days
• Field of Search: 102/202.5, 102/202.7, 102/202.14, 102/206, 102/207, 102/210, 102/215, 102/217, 102/218, 102/275.11, 361/248, 361/249, 361/251, 361/252
• US Class Current: 102/202.7
• CPC Class Codes: E21B 43/1185 Ignition systems
• CPC Class Codes: F42B 3/121 Initiators with incorporated integrated circuit
• CPC Class Codes: F42B 3/122 Programmable electronic delay initiators
• CPC Class Codes: F42D 1/055 specially adapted for firing multiple charges with a time delay
• CPC Class Codes: H05K 1/162 incorporating printed capacitors
• CPC Class Codes: H05K 1/167 incorporating printed resistors
• CPC Class Codes: Y10T 29/49117 Conductor or circuit manufacturing

Abstract

A detonator assembly is provided for use in oilfield operations to detonate an explosive downhole including a capacitor discharge unit and initiator electrically connected together to form a single unit. Further, provided is a method of fabricating an integrated detonator. Additionally, a method of use for an integrated detonating unit is provided.

Claims

1. A method of fabricating an integrated detonator, comprising:

providing a capacitor discharge unit;

mechanically and electrically connecting a transformer to the capacitor discharge unit;

mechanically and electrically connecting an addressable chip to the transformer; and

electrically connecting a micro-switch and initiator to the capacitor discharge unit.

2. The method of claim 1, wherein providing a capacitor discharge unit comprises mechanically and electrically connecting a resistor and a capacitor.

3. The method of claim 2, further comprising providing an explosive proximate the initiator.

4. A method for use in a wellbore, comprising:

providing a capacitor, an initiator, a micro-switch, an addressable chip, a transformer, and an initiating explosive mechanically and electrically connected together to form an integrated detonating unit;

connecting the integrated detonating unit to an explosive tool;

deploying the explosive tool in the wellbore; and

firing the initiator to activate the explosive tool.

5. The method of claim 4, wherein the explosive tool is a jet cutter.

6. The method of claim 4, wherein the explosive tool is a shaped charge.

7. The method of claim 6, further comprising:

selecting the shaped charge to fire from a plurality of shaped charges deployed in the wellbore.