EXHIBIT (21)

LUFKIN INDUSTRIES, INC. AND SUBSIDIARIES

SUBSIDIARIES OF THE REGISTRANT

	Jurisdiction of Incorporation	Name Under Which such
Name of Subsidiary	or Organization	Subsidiary Does Business
Lufkin Industries Canada, Ltd.	Canada	Same
Lufkin Argentina, S.A.	Argentina	Same
Lufkin Inversora S.A.	Argentina	Same
Lufkin France, S.A.S.	France	Same
Lufkin Middle East	Egypt	Same
Lufkin & Partners	Oman	Same
Lufkin Industries Australia Pty. Ltd.	Australia	Same
Lufkin Industries SRL	Romania	Same
Lufkin do Brasil	Brazil	Same
Lufkin Canada Holdings I Ltd.	Canada	Same
Pentagon Optimization Services, Inc.	Canada	Same
Quinn Pumps Canada Ltd.	Canada	Same
Quinn Pumps Inc.	Texas	Same
Quinn Pumps North Dakota Inc.	North Dakota	Same
Quinn Pumps (California) Inc.	California	Same
Grenco Energy Services Inc.	Canada	Same
Grenco Energy Services LP	Canada	Same
Grenco Energy Services (USA) Inc.	Texas	Same
Lufkin Finance I ULC	Canada	Same
Lufkin Finance II ULC	Canada	Same
Lufkin Finance III ULC	Canada	Same
Lufkin Finance (US) LP	Texas	Same
Lufkin Finance Canada LP	Canada	Same
Lufkin MENA Services Ltd.	British Virgin Islands	Same
Lufkin MENA Ltd.	Dubai UAE	Same
Lufkin Eastern Energy Malaysia SDN. BHD.	Malaysia	Same