Inlay for shaped charge and method of use

• US 10,520,286 B2
• Filed: 06/07/2018
• Issued: 12/31/2019
• Est. Priority Date: 04/06/2018
• Status: Active Grant

• Current Assignee: DynaEnergetics Europe GmbH (DMC Global, Inc.)
• Original Assignee: DYNAenergetics GmbH & Co. KG (DMC Global, Inc.)
• Inventors: Loehken, Joern Olaf, Will, Denis, Fricke, Bernd
• Primary Examiner(s): Bergin, James S
• Application Number:
  US16/002,217
• Publication Number:
  US 20190310056A1
• Time in Patent Office: 572 Days
• Field of Search: 102306, 102308, 102309, 102310, 102476, 102307
• CPC Class Codes: E21B 43/117 Shaped-charge perforators E21B43/118 takes precedence
• CPC Class Codes: F42B 1/02 Shaped or hollow charges blasting cartridges with cavities in the charge F42B3/08; oil winning using shaped-charge perforators E21B43/116
• CPC Class Codes: F42B 1/028 characterised by the form of the liner
• CPC Class Codes: F42B 3/08 with cavities in the charge, e.g. hollow-charge blasting cartridges

Abstract

According to some embodiments, a shaped charge inlay may include an upper edge that extends inward and horizontal to an edge of a shaped charge casing associated with a shaped charge. The shaped charge includes an existing liner and the shaped charge inlay further includes a body that extends inward toward an apex of the existing liner. The shaped charge inlay may be disposed above the existing liner in the shaped charge, to disrupt collapse of the existing liner upon detonation of the shaped charge and thereby change the geometry of a perforating jet and resulting perforation created by the shaped charge.

Claims

1. A shaped charge inlay to cover a portion of an inner surface of a conical shaped charge liner, the shaped charge inlay comprising:

a continuous ring comprising two or more fingers extending from the continuous ring, each finger being spaced apart from each other and comprising an upper edge and a distal edge, the upper edge depending from the continuous ring and the distal edge being spaced apart from the upper edge, wherein

the fingers are shaped to adapt to a shape of the shaped charge liner,

the distal edges of the fingers are spaced apart from each other, such that the inlay comprises an open apex,

at least one of the continuous ring and the upper edge of the fingers is configured to be secured to an upper edge of the shaped charge liner, and

wherein the shaped charge inlay is configured to transform a perforating jet to create a slotted perforation hole geometry.

2. The shaped charge inlay of claim 1, wherein at least one of the continuous ring and the fingers are affixed to the shaped charge liner by an adhesive.

3. The shaped charge inlay of claim 1, wherein at least one of the continuous ring and the fingers are affixed to the shaped charge liner by a friction fit.

4. The shaped charge inlay of claim 1, wherein the continuous ring is configured for being coupled to an upper edge of the shaped charge liner, the upper edge of the liner being spaced apart from an apex of the liner.

5. The shaped charge inlay of claim 1, wherein the shaped charge inlay is formed from an inert material and is comprised of a rigid or semi-rigid material that includes at least one of a plastic material, a polymer and a metal.

6. The shaped charge inlay of claim 1, wherein the fingers comprise one of a triangle shape and a trapezoid shape.

7. The shaped charge inlay of claim 1, wherein each finger comprises an indentation extending from the upper edge towards the distal edge.

8. The shaped charge inlay of claim 7, wherein the indentation does not extend to the distal edge of the finger.

9. The shaped charge inlay of claim 1, wherein the fingers comprise:

two fingers spaced apart from each other on the continuous ring, each finger spanning 10 degrees to 160 degrees of a circumference of the continuous ring.

10. A shaped charge inlay comprising:

a continuous ring; and

two or more fingers extending from the continuous ring, wherein the fingers comprise an upper edge extending from the continuous ring and a distal edge spaced apart from the upper edge, wherein the distal edges of the fingers are spaced apart from each other such that the inlay comprises an open apex, wherein

at least one of the continuous ring and the upper edge is configured for being coupled to an upper edge of a conical shaped charge liner,

the fingers are contoured to adapt to a shape of the shaped charge liner, and

the shaped charge inlay is configured to transform a perforating jet to create a slotted perforation hole geometry.

11. The shaped charge inlay of claim 10, wherein at least one of the continuous ring and the fingers are affixed to the shaped charge liner by an adhesive or by a friction fit.

12. The shaped charge inlay of claim 10, wherein the shaped charge inlay is formed from an inert material that includes at least one of a plastic material, a polymer and a metal.

13. The shaped charge inlay of claim 10, wherein the fingers cover a portion of the shaped charge liner to define a shape for transforming a perforating jet produced by detonating the shaped charge to produce the slotted perforation hole geometry.

14. The shaped charge inlay of claim 10, wherein the fingers comprise:

two fingers spaced apart from each other on the continuous ring, each finger spanning 10 degrees to 160 degrees of a circumference of the continuous ring.

15. A method of changing a perforating jet geometry of a shaped charge, comprising:

inserting a shaped charge inlay into a shaped charge comprising an explosive load and a conical shaped charge liner adjacent the explosive load, wherein

the shaped charge inlay comprises a continuous ring and two or more fingers extending from the continuous ring, wherein each of the fingers comprise an upper edge depending from the continuous ring and a distal edge spaced apart from the upper edge, wherein the distal edges are spaced apart from each other such that the inlay comprises an open apex, and the fingers are contoured to adapt to a shape of the liner, and

at least one of the continuous ring and the upper edge of the fingers is coupled to the upper edge of the conical shaped charge liner; and

detonating the shaped charge to form a perforating jet and transform the perforating jet to produce a slotted perforation hole geometry in a target.

16. The method of claim 15, wherein at least one of the continuous ring and the fingers are affixed to the liner by an adhesive or by a friction fit.

17. The method of claim 15, wherein the shaped charge inlay is formed from an inert material that includes at least one of a plastic material, a polymer and a metal.