For the Inventor, By the Inventor

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Orange, CA, United States of America

Varco International, Inc.

USPTO Granted Patents = 49

Trademarks = 4

Forward Citations = 2,209

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36 inventors (with patents filed for the assignee):

George I Boyadjieff (32 out of 51 patents)

Andrew B Campbell (7 out of 12 patents)

Igor Krasnov (5 out of 21 patents)

4. Padmasiri Daya Seneviratne (4 out of 9 patents)

5. Preston R Fox (2 out of 12 patents)

6. Brian L Eidem (2 out of 13 patents)

7. Jerry A Gill (2 out of 2 patents)

8. Roderick K Abbott (2 out of 2 patents)

9. Daniel P Juhasz (2 out of 11 patents)

10. Lawrence E Wells (2 out of 2 patents)

11. Joseph A Picard (2 out of 2 patents)

12. Timothy Montgomery (1 out of 3 patents)

13. Mallappa Ishwarappa Guggari (1 out of 6 patents)

14. Hans Van Rijzingen (1 out of 12 patents)

15. Herman M Kamphorst (1 out of 7 patents)

Core Competencies:

Pipe Running Tool

Torque Measurement

Tubular Lining

Blowout Preventers

Drawworks Control

Well Pipe Handling

Top Drive Drilling

Drill String Actuator

Fluid Actuated Jack

Pipe Spinning Tool

Well Casing Jack

Safety Valves

49 patents: Sort by Forward Citations

1. 6938709 - Pipe running tool (2005-09-06),

2. 6354158 - System for measuring torque applied to the drum shaft of a hoist (2002-03-12),

3. 6294042 - Method and apparatus for lining tubulars and lined tubular assembly (2001-09-25),

4. 6276450 - Apparatus and method for rapid replacement of upper blowout preventers (2001-08-21),

5. 6029951 - Control system for drawworks operations (2000-02-29),

6. 5451129 - Pipe transfer system (1995-09-19),

7. 5340182 - Safety elevator (1994-08-23),

8. 5050691 - Detachable torque transmitting tool joint (1991-09-24),

9. 4875529 - Alternate forms of, side drive drilling (1989-10-24),

10. 4765401 - Apparatus for handling well pipe (1988-08-23),

11. 4709766 - Well pipe handling machine (1987-12-01),

12. 4696207 - Well pipe handling machine (1987-09-29),

13. 4625796 - Well pipe stabbing and back-up apparatus (1986-12-02),

14. 4610465 - Structure and use of remotely releasable pile connectors (1986-09-09),

15. 4605077 - Top drive drilling systems (1986-08-12),

Varco International, Inc. is a global oilfield equipment and services company. With a wide range of products, technology, and services, we cater to the needs of the oil and gas industry. Our expertise lies in providing reliable drilling solutions, well construction products, and rig equipment. We have a strong commitment to safety, innovation, and customer satisfaction. Visit our website to learn more about our offerings and how we can assist your oilfield operations.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 30 2025

49 Patents

#3 in Orange, CA

#1,641 in California

#6,915 in US

#13,865 in the World

Orange, CA, United States of America

Varco International, Inc.

Forward Citations = 2,209

36 inventors:

George I Boyadjieff (32 out of 51 patents)

Andrew B Campbell (7 out of 12 patents)

Igor Krasnov (5 out of 21 patents)

4. Padmasiri Daya Seneviratne (4 out of 9 patents)

5. Preston R Fox (2 out of 12 patents)

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