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Conroe, TX, United States of America

National Oilwell Dht, L.p.

USPTO Granted Patents = 63

CIPO Patents = 8

EPO Patents = 18

Trademarks = 7

Forward Citations = 242

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93 inventors (with patents filed for the assignee):

Reza Rahmani (7 out of 12 patents)

Russell C Gilleylen (7 out of 13 patents)

Jeffery Ronald Clausen (7 out of 27 patents)

4. Jiinjen Albert Sue (6 out of 18 patents)

5. Harold Sreshta (6 out of 13 patents)

6. Michael D Hughes (6 out of 6 patents)

7. Nicholas Ryan Marchand (5 out of 31 patents)

8. Guodong Zhan (5 out of 16 patents)

9. Kevin William Clark (5 out of 8 patents)

10. Navid Omidvar (4 out of 6 patents)

11. Thang Vo (4 out of 6 patents)

12. C Steven Isaacks (4 out of 5 patents)

13. Anil Kumar (3 out of 192 patents)

14. Alamzeb Hafeez Khan (3 out of 7 patents)

15. Gregory Edward Leuenberger (3 out of 6 patents)

Core Competencies:

Earth-Boring Bits

Cementing Tubing

Drilling Oscillation Systems

Downhole Adjustable Bend Assemblies

Wellsite Sensor Assembly

Polycrystalline Diamond Cutting Element

Measurement While Drilling

Hybrid Rolling Cone Drill Bits

Mud Motor Apparatus

Wear-Resistant Materials

Shock Tools

Drilling Systems

63 patents: Sort by Forward Citations

1. 12071818 - Mechanical attachment of cutting elements to an earth-boring bit (2024-08-27),

2. 12000235 - System and method for cementing a tubing (2024-06-04),

3. 11377911 - Fixed cutter drill bits including nozzles with end and side exits (2022-07-05),

4. 11225835 - Downhole adjustable bend assemblies (2022-01-18),

5. 11220869 - Drill bit inserts and drill bits including same (2022-01-11),

6. 11220866 - Drilling oscillation systems and shock tools for same (2022-01-11),

7. 11208849 - Drill bit cutter elements and drill bits including same (2021-12-28),

8. 11208846 - Drilling tool with non-synchronous oscillators and method of using same (2021-12-28),

9. 11181657 - Wellsite sensor assembly and method of using same (2021-11-23),

10. 11149498 - Wired downhole adjustable mud motors (2021-10-19),

11. 11085258 - Systems, methods, and computer-readable media to monitor and control well site drill cuttings transport (2021-08-10),

12. 11002099 - Valves for actuating downhole shock tools in connection with concentric drive systems (2021-05-11),

13. 10988988 - Drilling systems and hybrid drill bits for drilling in a subterranean formation and methods relating thereto (2021-04-27),

14. 10954722 - Fixed cutter drill bits including nozzles with end and side exits (2021-03-23),

15. 10906104 - Systems and methods of fabrication and use of wear-resistant materials (2021-02-02),

National Oilwell DHT, L.P. (NOV DHT) is a global leader in the design, manufacture, and sale of equipment and components used in oil and gas drilling and production operations. With a diverse product portfolio, NOV DHT provides solutions to enhance efficiency, safety, and sustainability for its customers in the energy industry. The company is committed to innovating and delivering cutting-edge technology that supports the ever-evolving needs of the oil and gas sector.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 30 2025

63 Patents

#1 in Conroe, TX

#325 in Texas

#5,575 in US

#11,332 in the World

Conroe, TX, United States of America

National Oilwell Dht, L.p.

Forward Citations = 242

93 inventors:

Reza Rahmani (7 out of 12 patents)

Russell C Gilleylen (7 out of 13 patents)

Jeffery Ronald Clausen (7 out of 27 patents)

4. Jiinjen Albert Sue (6 out of 18 patents)

5. Harold Sreshta (6 out of 13 patents)

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