0000950134-98-005910 SC 13G/A 1 19980714 NASD CHANEY R & PARTNERS 1993 LP R CHANEY & CO INC R CHANEY & PARTNERS II LP ROBERT H CHANEY 3DX TECHNOLOGIES INC 0000915518 1311 760386601 DE 1231 SC 13G/A 34 005-49753 98666062 12012 WICKCHESTER SUITE 250 HOUSTON TX 77079 2815793398 12012 WICKCHESTER SUITE 250 HOUSTON TX 77079 CHANEY R & PARTNERS 1993 LP 0001019520 760560506 DE 1231 SC 13G/A 909 FANNIN SUITE 1275 TWO HOUSTON CENTER HOUSTON TX 77010 7137531315 909 FANNIN SUITE 1275 TWO HOUSTON CENTER HOUSTON TX 77010 SC 13G/A 1 000095013498005910-001-seq1-sc-13g-a.txt AMENDMENT NO. 1 TO SCHEDULE 13G