SQL Script to Find CC Numbers

My client needs to purge all CC numbers from their database. They were using a text field to hold these numbers. There was no particular postioning of these numbers. They could appear anywhere in the string. Does anyone have a script that would find a sequence of 16 consecutive numbers or a format like NNNN NNNN NNNN NNNN? Their database in MS SQL Server 2008.
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select REGEXP_REPLACE('joe,bloggs,1234 1234 1234 1241,england','\d{4}\s\d{4}\s\d{4}\s\d{4}','0000 0000 0000 0000') from dual

Use a regular expression like the above one?  It replaces the number pattern with zeros.  Just adapt it for an update statement.

HainKurtSr. System AnalystCommented:
HainKurtSr. System AnalystCommented:
or using patIndex

with cc as (
select 1 id, 'my cc is 4234 7867 9238 2235 1237. it will expire next year' info
select 2 id, '4452 2344 7456 3452 2344' info
select 3 id, 'cc: 4508 7867 3231 1120 5341' info
select substring(info, PatIndex('%[0-9][0-9][0-9][0-9] [0-9][0-9][0-9][0-9] [0-9][0-9][0-9][0-9] [0-9][0-9][0-9][0-9]%', info), 19) from cc

4234 7867 9238 2235
4452 2344 7456 3452
4508 7867 3231 1120

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