Exhibit 23.4

                       CONSENT OF INDEPENDENT ACCOUNTANTS

   We hereby consent to the use in this Amendment No. 1 to the Registration
Statement on Form S-4 of our report dated March 30, 1998 relating to the
financial statements of OEC Compression Corporation, which appears in such
Registration Statement. We also consent to the reference to us under the
headings "Experts" and "Selected Historical Financial Data--OEC" in such
Registration Statement.

                                          /s/ PricewaterhouseCoopers LLP

Tulsa, Oklahoma

December 21, 2000