logo

For the Inventor, By the Inventor

Houston, TX, United States of America

Varco Shaffer, Inc.


USPTO Granted Patents = 15


Trademarks = 3

Forward Citations = 863

Loading Chart...
Loading Chart...

18 inventors (with patents filed for the assignee):

goldMedal James Dennis Brugman (5 out of 17 patents)

silverMedal Melvyn F Whitby (3 out of 24 patents)

bronzeMedal David L O'Donnell (3 out of 3 patents)

4.  Bryce A Levett (3 out of 3 patents)

5.  Mark A Merit (2 out of 7 patents)

6.  Tri Canh Le (2 out of 3 patents)

7.  Hubert L Elkins (2 out of 6 patents)

8.  Paul L Tasson (2 out of 3 patents)

9.  Raul Araujo (1 out of 12 patents)

10.  David Wayne Martin (1 out of 3 patents)

11.  Christopher Dale Johnson (1 out of 11 patents)

12.  George Tisdale (1 out of 3 patents)

13.  Ronald W Yater (1 out of 1 patent)

14.  Esteban Palomo, Jr (1 out of 1 patent)

15.  Chris Dale Johnson (1 out of 1 patent)


15 patents:

1. 7380589 - Subsea coiled tubing injector with pressure compensation (2008-06-03),
2. 6857634 - BOP assembly with metal inserts (2005-02-22),
3. 6719042 - Shear ram assembly (2004-04-13),
4. 6374925 - Well drilling method and system (2002-04-23),
5. 6244560 - Blowout preventer ram actuating mechanism (2001-06-12),
6. 6192680 - Subsea hydraulic control system (2001-02-27),
7. 5975484 - Door connectors (1999-11-02),
8. 5897094 - BOP with improved door connectors (1999-04-27),
9. 5778918 - Pilot valve with improved cage (1998-07-14),
10. 5735502 - BOP with partially equalized ram shafts (1998-04-07),
11. 5662171 - Rotating blowout preventer and method (1997-09-02),
12. 5588491 - Rotating blowout preventer and method (1996-12-31),
13. 5575452 - Blowout preventer with ram wedge locks (1996-11-19),
14. 5505426 - Hydraulically controlled blowout preventer (1996-04-09),
15. 5400857 - Oilfield tubular shear ram and method for blowout prevention (1995-03-28),
Company Overview
Varco Shaffer, Inc. is a prominent player in the oil and gas industry, specializing in the design and manufacturing of drilling equipment and related technologies. The company focuses on providing innovative solutions that enhance drilling efficiency and safety, catering to the needs of energy companies worldwide. With a strong presence in Houston, TX, Varco Shaffer is committed to advancing drilling technology through research and development, ensuring that its products meet the evolving demands of the energy sector.
Profile summary synthesized from public USPTO records and patent filings.

logo

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

15 Patents

#343 in Houston, TX

#1,296 in Texas

#21,034 in US

#39,881 in the World

Houston, TX (US)
Houston, TX, United States of America

Varco Shaffer, Inc.

Forward Citations = 863

18 inventors:

goldMedal James Dennis Brugman (5 out of 17 patents)

silverMedal Melvyn F Whitby (3 out of 24 patents)

bronzeMedal David L O'Donnell (3 out of 3 patents)

4.  Bryce A Levett (3 out of 3 patents)

5.  Mark A Merit (2 out of 7 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Varco Shaffer, Inc.. Retrieved from https://idiyas.com/company/varco-shaffer

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
Loading…