# US 2013/0153295 A1 · Coupler compliance tuning for mitigating shock produced by well perforating

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- Number: US 2013/0153295 A1
- Document ID: US20130153295A1
- Status: Published application
- Kind: A1
- Application number: 13/633,077
- Filed: 2012-10-01
- Published: 2013-06-20
- Earliest claimed: 2011-12-14
- Assignees: Halliburton Energy Services, Inc.
- Inventors: John P. RODGERS; Marco SERRA; Timothy S. GLENN; John D. BURLESON
- Web page: https://patentgrep.com/patent/US20130153295A1

## CPC

- E21B 43/1195: {Replacement of drilling mud; decrease of undesirable shock waves}
- E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS

## Abstract

A method of mitigating perforating effects produced by well perforating can include causing a shock model to predict perforating effects for a proposed perforating string, optimizing a compliance curve of at least one proposed coupler, thereby mitigating the perforating effects for the proposed perforating string, and providing at least one actual coupler having substantially the same compliance curve as the proposed coupler. A well system can comprise a perforating string including at least one perforating gun and multiple couplers, each of the couplers having a compliance curve, and at least two of the compliance curves being different from each other. A method of mitigating perforating effects produced by well perforating can include interconnecting multiple couplers spaced apart in a perforating string, each of the couplers having a compliance curve, and selecting the compliance curves based on predictions by a shock model of shock generated by the perforating string.

## Claims

### Claim at position 1

1-8. (canceled)

### Claim 9

A well system, comprising:
a perforating string including at least one perforating gun and multiple couplers, each of the couplers having a compliance curve, and at least two of the compliance curves being different from each other, wherein the coupler compliance curves are optimized using a shock model.

### Claim 10 (depends on 9)

The well system of claim 9, wherein at least one of the couplers is interconnected between first and second perforating guns.

### Claim 11 (depends on 9)

The well system of claim 9, wherein at least one of the couplers is interconnected between the perforating gun and a firing head.

### Claim 12 (depends on 9)

The well system of claim 9, wherein at least one of the couplers is interconnected between the perforating gun and a packer.

### Claim 13 (depends on 9)

The well system of claim 9, wherein at least one of the couplers is interconnected between a firing head and a packer.

### Claim 14 (depends on 9)

The well system of claim 9, wherein a packer is interconnected between at least one of the couplers and the perforating gun.

### Claim 15 (depends on 9)

The well system of claim 9, wherein the couplers mitigate transmission of shock through the perforating string.

### Claim 16 (depends on 9)

The well system of claim 9, wherein the optimization of the coupler compliance curves comprises running at least one shock model simulation of the perforating string.

### Claim at position 10

17-28. (canceled)