EXPLOSIVE TUBING SWAGER

• US 3,661,004 A
• Filed: 11/07/1969
• Issued: 05/09/1972
• Est. Priority Date: 11/07/1969
• Status: Expired due to Term

• Current Assignee: Donald P. Keathley, John T.M. Lee
• Original Assignee: Donald P. Keathley, John T.M. Lee
• Inventors: Lee, John T. M., Keathley, Donald P.
• Primary Examiner(s): Herbst, Richard J.
• Application Number:
  US04/874,767
• Time in Patent Office: 914 Days
• Field of Search: 72/56 29/421E
• US Class Current: 72/56
• CPC Class Codes: B21D 26/08 generated by explosives, e.g. chemical explosives
• CPC Class Codes: B21D 39/042 using explosives by explosive welding B23K20/08
• CPC Class Codes: Y10T 29/49806 Explosively shaping
• CPC Class Codes: Y10T 29/49911 by expanding inner annulus

Abstract

A non-rupturable spool and an explosive cartridge formed therewith useful for swaging tubing. An explosive charge is contained within the spool and a transfer media, such as rubber, is placed over the spool to form the cartridge. The cartridge is inserted into a tube and the charge is detonated which swages the tube against a sleeve or die.

Claims

1. A metal Tube swaging device comprising a non-rupturable cylindrical metal piece having a head portion, a ductile deformable middle portion, a substantially non-compressible transfer medium covering said middle portion and an end portion, said middle portion having a lesser diameter than said head and said end portion, a well means extending from said head portion into said middle portion for the placement of an explosive charge and for completely containing the products of decomposition developed in the well by the detonation of the charge to deform the middle portion and transfer medium.

2. The spool of claim 1 wherein an explosive charge is contained in said well.

3. The cartridge of claim 2 wherein a means is provided for firing said explosive charge.

4. The cartridge of claim 3 wherein said middle portion has a solid portion adjacent said end portion.

5. The cartridge of claim 3 wherein said end portion is relieved.

6. The cartridge of claim 3 wherein said transfer medium is an elastomer.

7. The cartridge of claim 3 wherein the outside diameter of said transfer medium is approximately equal to the diameter of said end portion.

8. The cartridge of claim 3 wherein said head portion has a greater diameter than said end portion.

9. The cartridge of claim 3 wherein there is a sealing ring on each side of said transfer medium.

10. The cartridge of claim 3 wherein said firing means is a percussion primer.

11. The cartridge of claim 10 wherein said head portion contains a void between said explosive charge and said percussion primer.

12. The cartridge of claim 3 wherein said explosive charge is a high explosive.

13. The cartridge of claim 12 wherein said high explosive comprises lead azide.

14. The cartridge of claim 12 wherein said high explosive comprises a primary explosive at the top of said well and a secondary explosive at the base of said well.