For the Inventor, By the Inventor

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Waller, TX, United States of America

Petroquip Energy Services, Llp

USPTO Granted Patents = 28

Trademarks = 3

Forward Citations = 145

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17 inventors (with patents filed for the assignee):

William John Darnell (20 out of 23 patents)

Rodney Wayne Long (17 out of 21 patents)

Charles David Wintill (16 out of 18 patents)

4. William Ryle Darnell (14 out of 14 patents)

5. Michael Chad Darby (8 out of 8 patents)

6. Robert Joe Coon (6 out of 78 patents)

7. Todd Ulrich Chretien (6 out of 11 patents)

8. Roddie Robert Smith (6 out of 49 patents)

9. Tracy Dean Blanton (3 out of 6 patents)

10. John Lee Emerson (2 out of 10 patents)

11. Kevin Scott Kippola (2 out of 4 patents)

12. Todd Ulrich Chretien, Sr (2 out of 2 patents)

13. Fredrick Sun-Veow Wong (2 out of 2 patents)

14. Bryan Lane (1 out of 16 patents)

15. William Tyler Livingston (1 out of 1 patent)

28 patents: Sort by Forward Citations

1. 11879320 - Particle trap apparatus and method (2024-01-23),

2. 11193347 - Slip insert for tool retention (2021-12-07),

3. 11015408 - Frac plug with integral setting tool (2021-05-25),

4. 10633946 - Frac plug with retention mechanism (2020-04-28),

5. 10385651 - Frac plug with retention mechanisim (2019-08-20),

6. 10378305 - Frac plug with retention mechanism (2019-08-13),

7. 9664008 - Downhole completion tool (2017-05-30),

8. 8567509 - Downhole tool (2013-10-29),

9. 8251153 - Control line feed through clamp (2012-08-28),

10. 8220555 - Downhole tool shifting mechanism and method for shifting a downhole tool (2012-07-17),

11. 8172000 - Method for feeding control lines for drilling or workovers (2012-05-08),

12. 8171998 - System for controlling hydrocarbon bearing zones using a selectively openable and closable downhole tool (2012-05-08),

13. 8151891 - Formation saver sub and method (2012-04-10),

14. 8141648 - Multiple-positioning mechanical shifting system and method (2012-03-27),

15. 7926595 - Filter sub (2011-04-19),

PETROQUIP ENERGY SERVICES, LLP is a global provider of oilfield services operating in over 20 countries. With a focus on technological innovation, we offer a comprehensive range of drilling and production solutions for the energy industry. Our expertise includes well construction, completion, and optimization services, as well as surface facilities engineering. We strive to deliver safe and efficient operations while maintaining strong environmental stewardship. Visit our website for more information.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

28 Patents

#1 in Waller, TX

#669 in Texas

#11,597 in US

#22,547 in the World

Waller, TX, United States of America

Petroquip Energy Services, Llp

Forward Citations = 145

17 inventors:

William John Darnell (20 out of 23 patents)

Rodney Wayne Long (17 out of 21 patents)

Charles David Wintill (16 out of 18 patents)

4. William Ryle Darnell (14 out of 14 patents)

5. Michael Chad Darby (8 out of 8 patents)

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