EXHIBIT 23.1

                   CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS

   As independent public accountants, we hereby consent to the use of our
report dated March 27, 2000, related to the financial statements of OEC
Compression Corporation for the years ended December 31, 1999 and 1998 (and to
all references to our Firm) included in or made a part of this registration
statement.

                                          /s/ Arthur Andersen LLP

Dallas, Texas

December 21, 2000