Here is a script to extract *ONLY* numbers from a string.

DECLARE @Sample TABLE(string VARCHAR(2000));
INSERT INTO @Sample
Values( 'hhjjj12345hhhkk'),('-7655'),('asd5-5dffgdfg105'),('hhjjj12345hhhkk'),('a1b2c3d4ee55fff666gggg7777h'),('Al1')
,('2Bob$'),('!Carl%'),('%D#?:"{}|\][+_)(*&^	%$#@!~`_+?>a*vi()(d&*(&*#?:"{}|\][J+o_n)es(*&^%$#@!~`_+?><,./;:"' ),('    Eddie     ')
;WITH Num1 (n) AS (SELECT 1 UNION ALL SELECT 1),
Num2 (n) AS (SELECT 1 FROM Num1 AS X, Num1 AS Y),
Num3 (n) AS (SELECT 1 FROM Num2 AS X, Num2 AS Y),
Num4 (n) AS (SELECT 1 FROM Num3 AS X, Num3 AS Y),
Nums (n) AS (SELECT ROW_NUMBER() OVER(ORDER BY n) FROM Num4),
FinalOutput AS (
SELECT string, (SELECT CASE WHEN SUBSTRING(string, n, 1) NOT LIKE '[^0-9]'
                       THEN SUBSTRING(string, n, 1)
                      ELSE ''
                  END + ''
           FROM Nums
           WHERE n <= LEN(string)
           FOR XML PATH('')) AS stringout
FROM @Sample)
SELECT string, stringout FROM FinalOutput;