For the Inventor, By the Inventor

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Orange, CA, United States of America

Varco International, Inc.

USPTO Granted Patents = 49

Trademarks = 3

Forward Citations = 2,218

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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

Top Drive Systems

Well Pipe Handling

Drill Rig Hook

Safety Elevator

Drilling Apparatus

Fluid Actuated Jack

Remotely Operated Valves

Pipe Spinner

Jacking Mechanism

Well Casing Jack

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 prominent provider of advanced drilling technology solutions, headquartered in Orange, California. The company specializes in the development and manufacturing of equipment essential for the oil and gas industry, including pipe running tools, torque measurement systems, and blowout preventers. Varco's expertise extends to tubular lining, drawworks control, and well pipe handling, positioning it as a key player in enhancing drilling efficiency and safety. Their innovative technologies support top drive drilling and drill string actuation, contributing to the evolution of modern drilling practices.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

49 Patents

#6 in Orange, CA

#1,681 in California

#7,138 in US

#14,266 in the World

Orange, CA, United States of America

Varco International, Inc.

Forward Citations = 2,218

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)

Please report any incorrect information to [email protected]

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