EXHIBIT 21

FLOTEK INDUSTRIES, INC.

LIST OF SUBSIDIARIES

CESI Chemical, Inc.

      Oklahoma Corporation

Material Translogistics, Inc.

      Texas Corporation

Padko International Incorporated

      Oklahoma Corporation

Petrovalve International, Inc.

      Alberta Corporation

Petrovalve, Inc.

      Delaware Corporation

USA Petrovalve, Inc.

      Texas Corporation

Turbeco, Inc.

      Texas Corporation

Flotek Paymaster, Inc.

      Texas Corporation

Teledrift Company

      Delaware Corporation

CESI Manufacturing, LLC

      Oklahoma Limited Liability Company

Flotek Industries FZE

      Jebel Ali Free Zone Establishment

Flotek International, Inc.

      Delaware Corporation

Flotek Ecuador Investments, LLC

      Texas Limited Liability Company

Flotek Ecuador Management, LLC

      Texas Limited Liability Company

Flotek Chemical Ecuador Cia. Ltda.

      Ecuador Limited Liability Company