# US 11,906,480 B2 · Stressed rock perforating-charge testing system

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- Number: US 11,906,480 B2
- Document ID: US11906480B2
- Status: Granted
- Kind: B2
- Application number: 17/043,916
- Filed: 2018-08-01
- Published: 2021-01-21
- Granted: 2024-02-20
- Earliest claimed: 2018-08-01
- Assignees: Halliburton Energy Services, Inc.
- Applicants: Halliburton Energy Services, Inc.
- Inventors: John Douglas Manning; Brenden Michael Grove
- Web page: https://patentgrep.com/patent/US11906480B2

## CPC

- G01N 3/10: generated by pneumatic or hydraulic pressure (G01N3/18 takes precedence)
- G01N 3/12: Pressure testing
- E21B 43/117: Shaped-charge perforators (E21B43/118 takes precedence)
- G01N 2203/0232: High pressure
- G01N 2203/0256: Triaxial, i.e. the forces being applied along three normal axes of the specimen
- G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q)
- E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS

## Abstract

Shaped charges used in wellbore perforating operations may be tested using a stressed rock perforating-charge testing system. The system includes a shaped charge testing chamber. The shaped charge testing chamber may include a loading and ejection piston and a core sample chamber. The core sample chamber is in mechanical communication with the loading and ejection piston and is sized to receive a core sample. The shaped charge testing chamber also includes a core sample stress applicator to apply stress to the core sample. Further, the system includes an ejection mechanism adjacent to the shaped charge testing chamber to provide an ejecting force on the loading and ejection piston.

## Claims

### Claim 1

A system comprising:
a shaped charge testing chamber comprising:
a loading and ejection piston;
a core sample chamber in mechanical communication with the loading and ejection piston and size to receive a core sample; and
a core sample stress applicator to apply stress to the core sample; and
an ejection mechanism adjacent to the shaped charge testing chamber to provide an ejecting force on the loading and ejection piston; and
a device comprising a hydraulic yoke for maintaining the core sample chamber in a testing position, wherein the hydraulic yoke comprises at least one hydraulic cylinder to provide pressure to maintain the core sample chamber in the testing position within the shaped charge testing chamber.

### Claim 2 (depends on 1)

The system of claim 1, wherein the hydraulic yoke comprises:
a yoke;
a vessel cap coupled to the yoke to form a seal over the core sample chamber; and
at least one hydraulic cylinder coupled to the yoke to provide pressure to maintain the core sample chamber in the testing position within the shaped charge testing chamber.

### Claim 3 (depends on 1)

The system of claim 1, wherein the device comprises a clamshell assembly
to maintain the core sample chamber in a testing position within the shaped charge testing chamber.

### Claim 4 (depends on 3)

The system of claim 3, wherein the clamshell assembly comprises two clamshell sections coupled by a hinge.

### Claim 5 (depends on 1)

The system of claim 1, wherein the core sample chamber comprises a confining sleeve that remains fixed within the shaped charge testing chamber during insertion and removal of the core sample.

### Claim 6 (depends on 1)

The system of claim 1, wherein the ejection mechanism ejects and retracts the loading and ejection piston using fluid pressure differentials from a hydraulic system or a pneumatic system.

### Claim 7 (depends on 1)

The system of claim 1, wherein the core sample chamber is removable from the shaped charge testing chamber.

### Claim 8 (depends on 1)

The system of claim 1, wherein the core sample stress applicator fills the shaped charge testing chamber with a fluid and pressurizes the fluid using a pressure booster.

### Claim 9 (depends on 1)

The system of claim 1, wherein the loading and ejection piston comprises a guiding mechanism to guide the loading and ejection piston along an inner diameter of the shaped charge testing chamber.

### Claim 10 (depends on 1)

The system of claim 1, further comprising:
a pore fluid pressurization mechanism to pressurize fluid located within pores of the core sample.

### Claim 11

A device comprising:
a shaped charge testing chamber;
a removable core sample chamber positionable within the shaped charge testing chamber and sized to receive a core sample;
a core sample stress applicator to apply stress to the core sample; and
a device comprising a hydraulic yoke to maintain the removable core sample chamber in a testing position within the shaped charge testing chamber, wherein the hydraulic yoke comprises at least one hydraulic cylinder to provide pressure to maintain the removable core sample chamber in the testing position within the shaped charge testing chamber.

### Claim 12 (depends on 11)

The device of claim 11, wherein the hydraulic yoke comprises:
a yoke; and
a vessel cap coupled to the yoke to form a seal over the removable core sample chamber.

### Claim 13 (depends on 11)

The device of claim 11, comprising:
an ejection mechanism to provide an ejection force on the removable core sample chamber to push the removable core sample chamber in a direction toward the hydraulic yoke.

### Claim 14 (depends on 13)

The device of claim 13, wherein the ejection mechanism is positioned adjacent to the shaped charge testing chamber.

### Claim 15 (depends on 11)

The device of claim 11, wherein the core sample stress applicator fills the shaped charge testing chamber with a fluid and pressurizes the fluid using a pressure booster.

### Claim 16 (depends on 11)

The device of claim 11, wherein the core sample stress applicator applies pressure up to 12,000 psi on the core sample.

### Claim 17

A system comprising:
a shaped charge testing chamber;
a core sample chamber positionable within the shaped charge testing chamber and sized to receive a core sample;
a core sample stress applicator to apply stress to the core sample;
a device comprising a hydraulic yoke that to maintain the core sample chamber in a testing position within the shaped charge testing chamber, wherein the hydraulic yoke comprises at least one hydraulic cylinder to provide pressure to maintain the core sample chamber in the testing position within the shaped charge testing chamber;
a loading and ejection piston in mechanical communication with the core sample chamber; and
an ejection mechanism adjacent to the shaped charge testing chamber to provide an ejecting force on the loading and ejection piston.

### Claim 18 (depends on 17)

The system of claim 17, wherein the core sample chamber is removable from the shaped charge testing chamber.

### Claim 19 (depends on 17)

The system of claim 17, wherein the core sample chamber comprises a rubber confining sleeve.