Shaped charge retainer system

Patent metadata

Field	Value
Publication number	US-10488163-B2
Application number	US-201515313019-A
Country	US
Kind code	B2
Filing date	May 21, 2015
Priority date	May 21, 2014
Publication date	Nov 26, 2019
Grant date	Nov 26, 2019

Abstract

An apparatus and method for locking a detonating cord against a shaped charge.

First claim

What is claimed is:

1. A cylindrical charge holder for use in a perforating gun comprising:
at least one charge hole located axially about the center adapted to fit at least one shaped charge disposed therein;
at least one retainer cutout located axially about the center and opposite of the at least one charge hole and having an irregular rectangular shape, wherein the retainer cutout is adapted to accept a retainer fitting adapted to couple to the end of a shaped charge and inserted or removed therethrough in only a first angular orientation, and once inserted may be locked into position by rotating it to a second angular orientation.

2. The apparatus of claim 1 , further comprising a first locking cutout located adjacent to the at least one retainer cutout, wherein the first locking cutout locks with a portion of a retainer fitting at the second angular orientation.

3. The apparatus of claim 1 , further comprising a plurality of charge hole cutouts and a plurality of corresponding retainer cutouts.

4. The apparatus of claim 3 , further comprising a plurality of corresponding first locking cutouts, each located adjacent to its corresponding retainer cutout.

5. The apparatus of claim 4 , wherein the first locking cutouts have a rectangular shape.

6. A retainer fitting for use on a shaped charge in a perforating gun comprising:
a base portion having an opening adapted to attached a shaped charge, a cutout adapted to allow the base portion to snap onto a shaped charge, and having an overall irregular rectangular shape adapted to fit into a corresponding irregular rectangular shaped retainer cutout on a charge holder in only a first angular orientation and locking into position at a second angular orientation; and
a detonating cord retainer portion.

7. The apparatus of claim 6 wherein the base portion is integral to a charge case.

8. The apparatus of claim 6 , wherein the overall irregular rectangular shape of the body portion further comprises a first rectangular portion and a second rectangular portion substantially parallel to the first rectangular portion.

9. The apparatus of claim 6 , the detonating cord retainer portion further comprising a first detonating cord retainer.

10. The apparatus of claim 9 , the detonating cord retainer portion further comprising a second detonating cord retainer.

11. The apparatus of claim 9 wherein the first detonating cord retainer comprises an arch.

12. The apparatus of claim 10 wherein the second detonating cord retainer comprises an arch.

13. The apparatus of claim 10 wherein the first detonating cord retainer and the second detonating cord retainer are adapted to accept a detonating cord at the first angular orientation and to substantially restrain the detonating cord when rotated to the second angular orientation.

14. A method for installing a shaped charge onto a charge holder comprising:
with an irregular rectangular shape attached thereto inserting the retainer fitting through an opening in the charge holder at only a first angular orientation;
rotating the retainer fitting to a second angular orientation; and
locking the retainer fitting at the second angular orientation.

15. The method of claim 14 , wherein the charge holder is a charge tube with a charge hole.

16. The method of claim 15 , further comprising inserting the shape charge through a charge hole.

17. The method of claim 14 further comprising installing a retainer fitting onto the end of the shaped charge.

18. The method of claim 14 , wherein the second angular orientation is approximately 45 degrees.

19. The method of claim 14 , mer comprising snapping the retainer fitting onto the shaped charge.

Assignees

• Hunting Titan Inc

Inventors

• Collins William Richard
• Mcdonald Debra Christine
• Schulte Bradley Dean

Classifications

• E21B43/116

  Gun or shaped-charge perforators · CPC title

• F42D1/043

  Connectors for detonating cords and ignition tubes, e.g. Nonel tubes (mounting of detonators in blasting cartridges F42B3/26) · CPC title

• F42B33/0207

  Processes for loading or filling propulsive or explosive charges in containers · CPC title

• F42B1/02 Primary

  Shaped or hollow charges (blasting cartridges with cavities in the charge F42B3/08; oil winning using shaped-charge perforators E21B43/116) · CPC title

• F42B1/036

  Manufacturing processes therefor {(F42B33/0214 - F42B33/0292 take precedence)} · CPC title