EX-21.1 2 d267762dex211.htm SUBSIDIARIES OF THE REGISTRANT

Exhibit 21.1

SUBSIDIARIES OF THE REGISTRANT

Name |  | State or Country of Incorporation
Ackerman International Holland B.V. |  | Netherlands
Advanced Production & Loading Inc. |  | Delaware
Advanced Production & Loading PLC |  | Cyprus
Advanced Production & Loading Pte Ltd |  | Singapore
Advanced Wirecloth, Inc. |  | Louisiana
Aggregate Plant Products Co. |  | Texas
AG Holding UK Unlimited |  | United Kingdom
Amercoat Corporation |  | California
Ameron (Malaysia) Sdn. Bnd |  | Malaysia
Ameron (Pte) Ltd |  | Singapore
Ameron (UK) Limited |  | United Kingdom
Ameron Brasil Industria E Comercio de Tubos Ltda |  | Brazil
Ameron Composites, Inc. |  | Delaware
Ameron Fiberglass-Composite Pipe B.V. |  | Netherlands
Ameron Holdings II Pte Ltd |  | Singapore
Ameron Holdings, Inc. |  | California
Ameron International Corporation |  | Delaware
Ameron Manufacturing Holdings Pte |  | Singapore
Ameron Singapore Poly Holdings Pte. Ltd. |  | Singapore
Ameron Spolka Z0.0 |  | Poland
Ameron Trading (Shanghai) |  | China
Ameron Trading Holdings Pte. Ltd. |  | Singapore
Amclyde UK Limited |  | United Kingdom
Andergauge Limited |  | United Kingdom
Andergauge Redback, LLC |  | Texas
Andergauge USA, Inc. |  | Texas
APCI |  | California
Anderson Group Limited |  | United Kingdom
ANS (1002) Limited |  | United Kingdom
Anson Limited |  | United Kingdom
Anson Nederland B.V. |  | Netherlands
Anson Oilfield Equipment PTE Limited |  | Singapore
APL (UK) Limited |  | United Kingdom
APL do Brasil Ltda |  | Brazil
APL Management Pte Ltd |  | Singapore
APL Norway AS |  | Norway
APL Technology AS |  | Norway
ASEP Automation Products BV |  | Netherlands
ASEP Coiled Tubing & Pumping BV |  | Netherlands
ASEP Far East Pte Ltd. |  | Singapore
ASEP Group Holding BV |  | Netherlands
ASEP Holding BV |  | Netherlands
ASEP Mexico SRL |  | Mexico
ASEP Middle East FZE |  | United Arab Emirates
ASEP Otomotiv Sanayi Ticaret Ltd. |  | Turkey
ASEP UK Ltd. |  | United Kingdom
ASEP Singapore Pte. Ltd. |  | Singapore
Big Red Tubulars Limited |  | British Virgin Islands
Black Max Argentina S.A. |  | Argentina

Name |  | State or Country of Incorporation
Bolenco Corporation |  | California
Bondstrand Corp. |  | California
Bonstrand Corporation |  | California
Bowen Downhole LLC |  | Delaware
Bowen Downhole, Inc. |  | Delaware
Brandt Energy Environmental, L.P. |  | Texas
Brandt Interests, Inc. |  | Delaware
Brandt Norge |  | Norway
Brandt Oilfield Services (M) Sdn. Bhd. |  | Malaysia
BW Offshore France SAS |  | France
C.M.A. Canavera S.r.l. |  | Italy
Camco Drilling Group Limited |  | United Kingdom
Chargewood Limited |  | United Kingdom
Centron International Inc. |  | Delaware
Christensen Roder Produtos E Servicos De Petroleo LTDA |  | Brazil
CJSC Novmash |  | Belarus
Coil Services (North Sea) Limited |  | United Kingdom
Coil Services ME LLC |  | United Arab Emirates
Conner Steel Products Holdings Co. |  | Delaware
Conner Steel Products, Inc. |  | Delaware
Contubos S.A. |  | Colombia
Cooperatie Intelliserv Holding U.A. |  | Netherlands
Cooperatie NOV NL U.A. |  | Netherlands
Corlac Equipment Corp |  | Barbados
CTES Limited |  | United Kingdom
Dalsin Limited |  | United Kingdom
Corporacion Californiana de Tuberias APS S. de R.L. de C.V. |  | Mexico
Dancing Star BVI |  | China
Diamond Products International Venezolana, C.A. |  | Venezuela
Dreco Canada GP LLC |  | Delaware
Dreco Canada L.P. |  | Alberta
Dreco Cayman L.P. |  | Cayman Islands
Dreco DHT Holding BV |  | Netherlands
Dreco DHT, Inc. |  | Delaware
Dreco Eastern Europe ULC |  | Alberta
Dreco Energy Holding BV |  | Netherlands
Dreco Energy NL Cooperatief U.A. |  | Netherlands
Dreco Energy Services ULC |  | Alberta
Dreco Europe Limited |  | United Kingdom
Dreco Holding ULC |  | Alberta
Dreco International Finance (Barbados) Ltd. |  | Barbados
Dreco International Holdings ULC |  | Alberta
Dreco Limited |  | United Kingdom
Dreco LLC |  | Delaware
Dupre International Nigeria |  | Nigeria
Elmar Far East Pty Ltd |  | Australia
Elmar Services Limited |  | United Kingdom
Elmar Services Pty Ltd |  | Australia
Enaco PLC |  | United Kingdom
Enerpro de Mexico, S.A. de C.V. |  | Mexico
Environmental Procedures LLC |  | Delaware

Name |  | State or Country of Incorporation
Fiber Glass System (Suzhou) Co. Ltd. |  | China
Fiber Glass Systems (Harbin) Co., Ltd. |  | China
Fiber Glass Systems Holdings, LLC |  | Delaware
FIBER GLASS SYSTEMS OMAN L.L.C. |  | Oman
Fiber Glass Systems, L.P. |  | Texas
Gauthier Brothers Rentals, Inc. |  | Louisiana
GP USA Holding, LLC |  | Delaware
GPEX, L.P. |  | Texas
Grant Prideco (Jiangsu) Drilling Products Co., Ltd |  | China
Grant Prideco (Singapore) Pte Ltd |  | Singapore
Grant Prideco AB TCA Holding LLC |  | Delaware
Grant Prideco Asia (Singapore) Pte Ltd |  | Singapore
Grant Prideco Canada ULC |  | Alberta
Grant Prideco de Venezulea, S.A. |  | Venezuela
Grant Prideco European Holding, LLC |  | Delaware
Grant Prideco Finance, LLC |  | Delaware
Grant Prideco Holding, LLC |  | Delaware
Grant Prideco III C. V. |  | Netherlands
Grant Prideco Jersey Limited |  | Jersey Islands
Grant Prideco Limited |  | United Kingdom
Grant Prideco Mauritius Limited |  | Mauritius
Grant Prideco Netherlands B.V. |  | Netherlands
Grant Prideco PC Composites Holdings, LLC |  | Delaware
Grant Prideco USA, LLC |  | Delaware
Grant Prideco, Inc. |  | Delaware
Grant Prideco, L.P. |  | Delaware
Grant Prideco, S.A. de C.V. |  | Mexico
Group KZ LLP |  | Kazakhstan
Hebei Huayouyiji Tuboscope Coating Co., Ltd. |  | China
HITEC AS |  | Norway
HITEC Dreco Limited |  | United Kingdom
Hydralift Amclyde, Inc. |  | Delaware
Hydralift AS |  | Norway
Hydralift France SAS |  | France
Hydralift Holding UK Ltd. |  | United Kingdom
Hydralift Singapore Pte. Ltd. |  | Singapore
Hydra-Rig, Inc. |  | Delaware
Inmobiliaria Industrial de Veracruz, S.A. de C.V. |  | Mexico
Inspecciones y Pruebas No Destructivs, S.A. de C.V. |  | Mexico
Intellipipe, Inc. |  | Delaware
Intelliserv GP Holdings LLC |  | Delaware
Intelliserv International Holding, Ltd |  | Cayman Islands
Intelliserv Mexico, S. de R.L. de C.V. |  | Mexico
IntelliServ Norway AS |  | Norway
Intelliserv, Inc. |  | Delaware
Intelliserv, LLC |  | Delaware
Island Ready-Mix Corporation, Inc. |  | Hawaii
Istok Business Services LLC |  | Russian Federation
Jiangyin Tuboscope Tubular Development Co., Ltd |  | China
JV FIDMASH |  | Belarus
Lanzhou LS-National Oilwell Petroleum Engineering Co. Ltd. |  | China

Name |  | State or Country of Incorporation
Linalog Limited |  | United Kingdom
LLTT, Ltd. |  | Trinidad and Tobago
LSI Asia Pacific Pte. Ltd. |  | Singapore
Mono Group |  | United Kingdom
Mono Group Pension Trustees Limited |  | United Kingdom
Mono Pumps (Australia) Proprietary Limited |  | Australia
Mono Pumps Ltd. |  | United Kingdom
Mono Pumps New Zealand Company |  | New Zealand
Monoflo NOV S.A.I.C. |  | Argentina
Mud Rentals Limited |  | United Kingdom
National Oilwell (U.K.) Limited |  | United Kingdom
National Oilwell Algerie |  | Algeria
National Oilwell Canada ULC |  | Alberta
National Oilwell de Mexico S.A. de C.V. |  | Mexico
National Oilwell de Venezuela, C.A. |  | Venezuela
National Oilwell DHT, LP |  | Delaware
National Oilwell Middle East |  | Nova Scotia
National Oilwell Netherlands BV |  | Netherlands
National Oilwell Nova Scotia Company |  | Nova Scotia
National Oilwell Ontario, LLC |  | Delaware
National Oilwell Poland S.p.z.o.o. |  | Poland
National Oilwell Services de Mexico, S.A. de C.V. |  | Mexico
National Oilwell Sogne AS |  | Norway
National Oilwell Varco (Beijing) Investment Management Co. Ltd. |  | China
National Oilwell Varco (Thailand) Ltd. |  | Thailand
National Oilwell Varco Bahrain WLL |  | Bahrain
National Oilwell Varco de Argentina S.A. |  | Argentina
National Oilwell Varco de Chile SRL |  | Chile
National Oilwell Varco de Colombia |  | Colombia
National Oilwell Varco do Brasil LTDA |  | Brazil
National Oilwell Varco Eurasia LLC |  | Russian Federation
National Oilwell Varco Fluid Control Norway AS |  | Norway
National Oilwell Varco Hjelset AS |  | Norway
National Oilwell Varco Holdings LLC |  | Delaware
National Oilwell Varco Holdings LLC |  | Delaware
National Oilwell Varco Korea Co., Ltd. |  | South Korea, Republic of
National Oilwell Varco MSW S.A. |  | Argentina
National Oilwell Varco Muscat LLC |  | Oman
National Oilwell Varco Norway AS |  | Norway
National Oilwell Varco Peru S.A. |  | Peru
National Oilwell Varco Petroleum Equipment (Shanghai) Co., Ltd. |  | China
National Oilwell Varco Pte Ltd. |  | Singapore
National Oilwell Varco Rig Equipment Trading (Shanghai) Co., Ltd. |  | China
National Oilwell Varco Sdn Bhd |  | Brunei Darussalam
National Oilwell Varco Solutions S.A. de C.V. |  | Mexico
National Oilwell Varco UK Limited |  | United Kingdom
National Oilwell Varco, Inc. |  | Delaware
National Oilwell Varco, L.P. |  | Delaware
National Oilwell-Netherlands B.V. |  | Netherlands
National-Oilwell Pte. Ltd. |  | Singapore
National-Oilwell Pty. Ltd. |  | Australia

Name |  | State or Country of Incorporation
Natoil LLC |  | Delaware
Natoil, Inc. |  | Delaware
NOCL Holding BV |  | Netherlands
NorthStar Drilling Services Ltd. |  | Turkey
NOV (Caymans), Ltd. |  | Cayman Islands
NOV (Malaysia) Sdn. Bhd. |  | Malaysia
NOV APL Limited |  | Cyprus
NOV ASEP Elmar (Middle East) Limited |  | United Kingdom
NOV ASEP Elmar de Brasil Equipamentos E Servicos Para Petroleu Ltda. |  | Brazil
NOV ASEP ELMAR MEXICO, S. DE R.L. DE C.V. |  | Mexico
NOV ASEP Elmar NL B.V. |  | Netherlands
NOV ASEP Elmar Pte Ltd |  | Singapore
NOV Brandt Europe France |  | France
NOV Brandt Oilfield Services Middle East LLC |  | United Arab Emirates
NOV DH de Mexico S.A. de C.V. |  | Mexico
NOV DHT Canada Holding ULC |  | Alberta
NOV Distribution Eurasia LLC |  | Russian Federation
NOV Downhole Thailand, LLC |  | Delaware
NOV Downhole Argentina, LLC |  | Delaware
NOV Downhole Azerbaijan, LLC |  | Delaware
NOV Downhole Bolivia S.R.L. |  | Bolivia
NOV Downhole Colombia, LLC |  | Delaware
NOV Downhole Comercializaco de Equipamentos para Petroleo Ltda. |  | Brazil
NOV Downhole Congo, LLC |  | Delaware
NOV Downhole Ecuador Cia. Ltda. |  | Ecuador
NOV Downhole Eurasia Limited |  | United Kingdom
NOV Downhole Europe B.V. |  | Netherlands
NOV Downhole Germany GmbH |  | Germany
NOV Downhole Italia S.R.L. |  | Italy
NOV Downhole Kazakhstan, LLC |  | Delaware
NOV Downhole Norway, LLC |  | Delaware
NOV Downhole Pty Ltd |  | Australia
NOV Downhole Romania, LLC |  | Delaware
NOV EAST BV |  | Netherlands
NOV EU Acquisition SNC |  | France
NOV European Holding LLC |  | Delaware
NOV Expatriate Services, Inc. |  | Delaware
NOV Fiber Glass Systems Fabricacao De Tubos E Conexoes Ltda |  | Brazil
NOV FGS SINGAPORE (PTE.) LTD |  | Singapore
NOV Fiber Glass Systems B.V. |  | Netherlands
NOV Fiber Glass Systems Fabricacao De Tubos E Conexoes Ltda |  | Brazil
NOV GEO Cayman Holdings Limited |  | Cayman Islands
NOV GEO GP LLC |  | Delaware
NOV GEO LP1 CV |  | Netherlands
NOV Ghana Limited |  | Ghana
NOV GP HOLDING LLC |  | Delaware
NOV GP SUB LLC |  | Delaware
NOV Group Holdings Limited |  | United Kingdom
NOV Holding Germany GmbH & Co KG |  | Germany
NOV Holding Germany Management GmbH |  | Germany
NOV Holdings BV |  | Netherlands

Name |  | State or Country of Incorporation
NOV India Private Limited |  | India
NOV Intelliserv UK Ltd |  | United Kingdom
NOV International Holding BV |  | Netherlands
NOV Korea Holding Co., Ltd. |  | Korea, Republic of
NOV Mexico Holding LLC |  | Delaware
NOV Mission do Brasil Comercialização de Equipamentos para Petróleo Ltda |  | Brazil
NOV Mission Products UK Limited |  | United Kingdom
NOV Oil and Gas Services Nigeria Limited |  | Nigeria
NOV Oilfield Services Vostok LLC |  | Russian Federation
NOV Park I BV |  | Netherlands
NOV Park II BV |  | Netherlands
NOV Rigstore, Inc. |  | Delaware
NOV Services Ltd. |  | Cayman Islands
NOV Servicios De Personal Mexico, S. De R.L. De C.V. |  | Mexico
NOV Tuboscope Italia S.r.l. |  | Italy
NOV Tuboscope Middle East LLC |  | United Arab Emirates
NOV TVI LLC |  | Delaware
NOV UK Finance Limited |  | United Kingdom
NOV UK Holdings Limited |  | United Kingdom
NOV UK Korea LP |  | United Kingdom
NOV West BV |  | Netherlands
NOV Worldwide CV |  | Netherlands
NOV-BLM SAS |  | France
NOV-Fabtech FZCO |  | United Arab Emirates
NOW (Asia), Inc. |  | Mauritius
NOW (Barbados) SRL |  | Barbados
NOW Canada, L.P. |  | Alberta
NOW Downhole Tools, Inc. |  | Delaware
NOW International LLC |  | Delaware
NOW International Nova Scotia Company |  | Nova Scotia
NOW Nova Scotia Holdings LLC |  | Delaware
NOW Oilfield Services, LLC |  | Delaware
NQL (Illinois) Inc. |  | Illinois
NQL (US) Inc. |  | Delaware
NQL Energy Services (Barbados) Ltd. |  | Barbados
NQL Energy Services US, Inc. |  | Texas
NQL Finance, L.L.C. |  | Delaware
NQL Holland B.V. |  | Netherlands
P&T Servicios Petroleros, C.A. |  | Venezuela
PESA Holding Pte Ltd. |  | Singapore
Pesaka Inspection Services SDN.BHD. |  | Malaysia
Prescott Drilling Motors, Inc. |  | Louisiana
Pridecomex Holding, S.A. de C.V. |  | Mexico
Procon Engineering Ltd. |  | United Kingdom
PSX Corp. |  | California
PSX Corporation |  | California
PT H-Tech Oilfield Equipment |  | Indonesia
PT National Oilwell Varco |  | Indonesia
Quality Tubing FSC |  | Virgin Islands (British)
Quality Tubing SA |  | Venezuela
Reed Hycalog International Limited |  | United Kingdom

Name |  | State or Country of Incorporation
ReedHycalog Algeria Servies EURL |  | Algeria
ReedHycalog Angola, LLC |  | Delaware
ReedHycalog Azerbaijan, LLC |  | Delaware
ReedHycalog Cameroon, LLC |  | Delaware
ReedHycalog CIS, LLC |  | Delaware
ReedHycalog Coring Services International, Inc. |  | Delaware
Reed-Hycalog de Mexico, S de R.L. de C.V. |  | Mexico
ReedHycalog India Private Limited |  | India
ReedHycalog International Holding, LLC |  | Delaware
Reed-Hycalog Services de Mexico S. de R.L. de C.V. |  | Mexico
Reed-Hycalog Singapore Partnership |  | Singapore
Reed-Hycalog UK Holdings, LLP |  | United Kingdom
ReedHycalog UK Ltd |  | Ireland
ReedHycalog, L.P. |  | Delaware
ReedHycalog, LLC |  | Delaware
Rig Technology Limited |  | United Kingdom
S.S.R. (International) Limited |  | United Kingdom
RIO CO, S. de R.L. de C.V. |  | Mexico
Screen Manufacturing Co. Ltd. |  | Trinidad and Tobago
Servicios Tubulares TT, S.A. de C.V. |  | Mexico
Shaffer India Private Limited |  | India
Smart Screen Systems, Inc. |  | Minnesota
Soil Recovery A/S |  | Denmark
South Seas Inspection (S) PTE LTD |  | Singapore
Star Fiberglass Harbin Co., Ltd. |  | China
STAR Sudamtex Tubulares S.A. (Joint Venture) |  | Venezuela
Stork MSW S.A. |  | Argentina
STS Products Inc. |  | Delaware
TA Industries, Inc. |  | Delaware
Telluride insurance Limited |  | Bermuda
The Brandt Company de Argentina S.A. |  | Argentina
Tianjin Grant Prideco TPCO Oilfield Products Co., Ltd. |  | China
Tianjin Grant TPCO Drilling Tools Company Limited |  | China
TS&M Supply |  | Alberta
TS&M Supply—Ontario |  | Ontario
TS&M Technical Sales & Maintenance Company |  | Nova Scotia
Tube-Alloy Capital Corporation |  | Texas
Tube-Kote, Inc. |  | Texas
Tubo-FGS, L.L.C. |  | Delaware
Tubos California Corporation |  | California
TUBOS Y ACTIVOS, S. de R.L. |  | Mexico
Tuboscope & Co. LLC |  | Oman
Tuboscope (Holding U.S.) LLC |  | Delaware
Tuboscope Brandt de Venezuela S.A. |  | Venezuela
Tuboscope Far East Australia Br. |  | Australia
Tuboscope Holdings Limited |  | United Kingdom
Tuboscope MECL (Trinidad) Ltd. |  | Trinidad and Tobago
Tuboscope Norge AS |  | Norway
Tuboscope Pipeline Services Inc. |  | Texas
Tuboscope Pipeline Services Limited |  | United Kingdom
Tuboscope Services, L.L.C. |  | Delaware

Name |  | State or Country of Incorporation
Tuboscope Servicios de Bolivia S.A. |  | Bolivia
Tuboscope Vetco (Deutschland) GmbH |  | Germany
Tuboscope Vetco (France) SAS |  | France
Tuboscope Vetco (Osterreich) GmbH |  | Austria
Tuboscope Vetco (Panama) Inc. |  | Panama
Tuboscope Vetco Canada ULC |  | Alberta
Tuboscope Vetco Capital Limited |  | United Kingdom
Tuboscope Vetco de Argentina S.A. |  | Argentina
Tuboscope Vetco Mexico, S.A. de C.V. |  | Mexico
Tuboscope Vetco Moscow |  | Russian Federation
Tuboscope Vetco Nigeria Limited |  | Nigeria
Tucom Composites Polyester Sanayi Ticaret Ltd. |  | Turkey
TVI Holdings, L.L.C. |  | Delaware
V.O.F. National Oilwell Varco |  | Netherlands
Varco Al Mansoori Services Company LLC |  | United Arab Emirates
Varco BJ BV |  | Netherlands
Varco BJ FSC Inc |  | Barbados
Varco Canada ULC |  | Alberta
Varco CIS |  | Russian Federation
Varco do Brasil Ltda. |  | Brazil
Varco Drilling Equipment do Brasil Ltda. |  | Brazil
Varco Holdings Canada ULC |  | Alberta
Varco I/P, Inc. |  | Delaware
Varco International de Venezuela, C.A. |  | Venezuela
Varco International do Brasil Equipamentos e Servicos Ltda. |  | Brazil
Varco International Inc. Pte. Ltd. |  | Singapore
Varco Norge AS |  | Norway
Varco UK Acquisitions Limited |  | United Kingdom
Varco US Canada Holding Inc. |  | Alberta
Varco US Finance, Inc. |  | Delaware
Varco US Holdings LLC |  | Delaware
Varco, L.P. |  | Delaware
Vector Oil Tool ULC |  | Alberta
Venwell International Inc. (Trinidad Branch) |  | Texas
Vetco Coating GmbH |  | Germany
Vetco Enterprise GmbH |  | Switzerland
Vetco Pipeline Services Ltd. |  | Alberta
Vetco Pipeline Services, Inc. |  | Texas
Vetco Saudi Arabia Ltd. |  | Saudi Arabia
Vetco Services Sendirian Berhad |  | Brunei Darussalam
Vetco Technology GmbH |  | Germany
Voest Alpine Middle East Free Zone Establishment |  | Austria
Voest Alpine Tubulars Gmbh |  | Austria
Voest Alpine Tubulars GmbH & Co KG |  | Austria
VON Holland Cooperaief U.A. |  | Netherlands
Woolley, Inc. |  | Texas
XL Systems Antilles, N.V. |  | Netherlands
XL Systems Europe B.V. |  | Netherlands
XL Systems International, Inc. |  | Delaware
XL Systems, L.P. |  | Texas
XST Holdings, Inc. |  | Texas