For the Inventor, By the Inventor

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Houston, TX, United States of America

Petroquip Energy Services, LLP

USPTO Granted Patents = 28

% Expired Patents = 35.7

Trademarks = 3

Forward Citations = 148

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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)

Core Competencies:

Particle Trap Apparatus

Slip Insert

Frac Plug

Downhole Completion Tool

Control Line Feed

Shifting Mechanism

Hydrocarbon Zones

Wellbore Equipment

Coiled Tubing

Valve Apparatus

Completion System

Filter Sub

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),

Company Overview

Petroquip Energy Services, LLP is a Houston-based company specializing in the development and manufacturing of equipment and services for the oil and gas industry. The organization focuses on providing innovative solutions that enhance operational efficiency and safety in energy production. With expertise in various engineering disciplines, Petroquip is committed to delivering high-quality products that meet the evolving needs of its clients in the energy sector, both domestically and internationally.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

28 Patents

#192 in Houston, TX

#675 in Texas

#12,016 in US

#23,299 in the World

Houston, TX, United States of America

Petroquip Energy Services, LLP

Forward Citations = 148

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)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Petroquip Energy Services, LLP. Retrieved from https://idiyas.com/company/petroquip-energy-services

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]

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