<TABLE> <S> <C>

<ARTICLE> 5
<LEGEND>
THE RESTATED FINANCIAL DATA SCHEDULE REFLECTS THE COMPANY'S MERGER WITH ENTERRA
CORPORATION ACCOUNTED FOR A POOLING OF INTERESTS AND CONTAINS SUMMARY FINANCIAL
INFORMATION EXTRACTED FROM THIS FORM 10-K AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<RESTATED>
<MULTIPLIER> 1,000
       
<S>                                        <C>                     <C>                     <C>
<PERIOD-TYPE>                                    3-MOS                   6-MOS                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1995             DEC-31-1995             DEC-31-1995
<PERIOD-END>                               MAR-31-1995             JUN-30-1995             SEP-30-1995
<CASH>                                          19,389                  20,131                  31,453
<SECURITIES>                                         0                       0                       0
<RECEIVABLES>                                  245,826                 250,361                 251,853
<ALLOWANCES>                                    12,130                  12,283                  12,771
<INVENTORY>                                    156,278                 155,009                 150,591
<CURRENT-ASSETS>                               435,790                 445,589                 455,119
<PP&E>                                       1,108,023               1,108,813               1,109,037
<DEPRECIATION>                                 644,331                 653,396                 652,937
<TOTAL-ASSETS>                               1,141,888               1,137,723               1,147,007
<CURRENT-LIABILITIES>                          170,142                 172,547                 180,544
<BONDS>                                              0                       0                       0
<PREFERRED-MANDATORY>                                0                       0                       0
<PREFERRED>                                          0                       0                       0
<COMMON>                                         5,062                   5,067                   5,088
<OTHER-SE>                                     742,792                 742,938                 761,159
<TOTAL-LIABILITY-AND-EQUITY>                 1,141,888               1,137,723               1,147,007
<SALES>                                        219,289                 430,368                 650,743
<TOTAL-REVENUES>                               219,289                 430,368                 650,743
<CGS>                                          157,391                 313,231                 471,150
<TOTAL-COSTS>                                  157,391                 313,231                 471,150
<OTHER-EXPENSES>                                37,574                 101,976                 139,205
<LOSS-PROVISION>                                     0                       0                       0
<INTEREST-EXPENSE>                               4,111                   8,255                  12,751
<INCOME-PRETAX>                                 20,580                   7,678                  29,030
<INCOME-TAX>                                     6,168                 (3,305)                   4,373
<INCOME-CONTINUING>                             14,439                  11,294                  24,442
<DISCONTINUED>                                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0
<CHANGES>                                            0                       0                       0
<NET-INCOME>                                    14,439                  11,294                  24,442
<EPS-PRIMARY>                                      .29                     .22                     .48
<EPS-DILUTED>                                      .29                     .22                     .48
        


</TABLE>