# US 10,480,295 B2 · Jet perforating device for creating a wide diameter perforation

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- Number: US 10,480,295 B2
- Document ID: US10480295B2
- Status: Granted
- Kind: B2
- Application number: 14/778,513
- Filed: 2013-05-30
- Published: 2016-06-02
- Granted: 2019-11-19
- Earliest claimed: 2013-05-30
- Assignees: Halliburton Energy Services, Inc.
- Applicants: Halliburton Energy Services, Inc.
- Inventors: Jerry L. Walker; Jason Paul Metzger; Gerald Graves Craddock, Jr.
- Web page: https://patentgrep.com/patent/US10480295B2

## CPC

- E21B 43/114: Perforators using direct fluid action {on the wall to be perforated}, e.g. abrasive jets
- E21B 43/117: Shaped-charge perforators (E21B43/118 takes precedence)
- E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS

## Abstract

An explosive charge assembly comprises a housing, a liner disposed on a face of an explosive charge, an opening through the liner disposed at the apex, and a lip disposed around the perimeter of the opening. The liner forms an apex and a mouth opposite the apex, and the liner and the explosive charge are disposed in the housing. The explosive charge is disposed between the liner and the housing, and the lip extends from the liner in a direction towards the mouth.

## Claims

### Claim 1

An explosive charge assembly comprising:
a housing;
an explosive charge disposed in the housing and comprising a face;
a liner disposed on the face of the explosive charge and in the housing such that the explosive charge is disposed between the liner and the housing, the liner comprising an apex, a mouth opposite the apex, an opening through the liner at the apex having a perimeter, and a lip disposed around the perimeter of the opening, and extending from the liner in a direction towards, and ending before a most forward plane formed by a ring of the mouth; and
wherein propagation of the explosive charge is focused along an explosive focus axis extending from the opening.

### Claim 2 (depends on 1)

The assembly of claim 1, further comprising an insert disposed on the liner around the opening and adjacent to the lip.

### Claim 3 (depends on 2)

The assembly of claim 2, wherein the insert is coupled to the liner and extends in a direction towards the mouth.

### Claim 4 (depends on 2)

The assembly of claim 2, wherein the lip retains the insert in the housing.

### Claim 5 (depends on 2)

The assembly of claim 2, wherein the insert extends from the lip a distance less than half the distance along the liner between the lip and the mouth.

### Claim 6 (depends on 1)

The assembly of claim 1, wherein the lip extends away from the central axis of the assembly.

### Claim 7 (depends on 1)

The assembly of claim 1, wherein the diameter of the opening is between 0.1% and 50% of the diameter of the mouth.

### Claim 8 (depends on 1)

The assembly of claim 1, wherein the opening through the liner is disposed about the central axis of the assembly.

### Claim 9

A method of perforating comprising:
detonating an explosive charge assembly, wherein the explosive charge assembly comprises:
a liner disposed on a face of an explosive charge, wherein the liner comprises an apex, a mouth opposite the apex, an opening through the liner at the apex having a perimeter, and a lip disposed around the perimeter of the opening and extending from the liner in a direction towards, and ending before a most forward plane formed by a ring of the mouth;
forming a jet focused along an explosive focus axis extending from the opening in response to the detonating, wherein the lip contributes to the formation of the jet;
engaging a casing with the jet; and
forming a perforation through the casing in response to the engagement with the jet.

### Claim 10 (depends on 9)

The method of claim 9, wherein the perforation has a diameter that is greater than a diameter of a comparative perforation formed from an explosive charge assembly without the lip.

### Claim 11 (depends on 10)

The method of claim 10, wherein the diameter of the perforation is greater than 5% of a comparative perforation formed from an explosive charge assembly without the lip.

### Claim 12 (depends on 9)

The method of claim 9, comprising an insert disposed on the liner around the opening and adjacent to the lip.

### Claim 13 (depends on 12)

The method of claim 12, wherein the perforation has a diameter that is greater than a comparative perforation formed from an explosive charge assembly with the lip but without the insert.

### Claim 14 (depends on 13)

The method of claim 13, wherein the diameter of the perforation is no less than 0.10% greater than a comparative perforation formed from an explosive charge assembly with the lip but without the insert.

### Claim 15 (depends on 12)

The method of claim 12, wherein the lip retains the insert.

### Claim 16

A method for making a liner for an explosive charge assembly, the method comprising:
drawing a material into a concave shape about a central axis of an apex, wherein the apex is centered on the central axis, wherein a mouth is formed at the opposite end from the apex;
forming an opening through the material at the apex about the central axis; and
forming a lip in the material around a perimeter of the opening, wherein the lip extends from the material in a direction towards, and ending before a most forward plane formed by a ring of the mouth, and wherein propagation of an explosive charge is focused along the central axis.

### Claim 17 (depends on 16)

The method of claim 16, wherein the drawing, the forming of the opening, and the forming a lip around the perimeter of the opening are each a part of the same manufacturing process.

### Claim 18 (depends on 16)

The method of claim 16, wherein the material comprises a metal.

### Claim 19 (depends on 16)

The method of claim 16, wherein the material is selected from the group of copper, copper alloy, aluminum, aluminum alloy, tin, tin alloy, lead, lead alloy, brass and tungsten.

### Claim 20 (depends on 19)

The method of claim 19, wherein the material comprises copper.

### Claim 21 (depends on 16)

The method of claim 16, wherein the lip extends away from the central axis.

### Claim 22 (depends on 16)

The method of claim 16, comprising providing an insert disposed on the material around the opening and adjacent to the lip.

### Claim 23 (depends on 22)

The method of claim 22, wherein the insert extends along an interior surface of the material from the perimeter of the opening a distance of less than half a distance along the material between the perimeter of the opening and the mouth.

### Claim 24 (depends on 22)

The method of claim 22, wherein the lip maintains a position of the insert.

### Claim 25 (depends on 16)

The method of claim 16, wherein a diameter of the opening is no less than 0.1% of the diameter of the mouth and no greater than 50% of the diameter of the mouth.