For the Inventor, By the Inventor

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Aberdeen, United Kingdom

Petrowell Limited

USPTO Granted Patents = 38

% Expired Patents = 31.6

CIPO Patents = 27

EPO Patents = 15

Forward Citations = 216

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28 inventors (with patents filed for the assignee):

Daniel George Purkis (20 out of 60 patents)

Iain Morrison MacLeod (4 out of 9 patents)

Steve Reid (4 out of 4 patents)

4. Andrew John Elrick (3 out of 15 patents)

5. Damien Gerard Patton (3 out of 9 patents)

6. Lee Mercer (3 out of 7 patents)

7. Colin Smith (3 out of 3 patents)

8. Stephen Reid (2 out of 25 patents)

9. Matthew Manning (2 out of 12 patents)

10. Oliver Webster (2 out of 6 patents)

11. Iain McLeod (2 out of 2 patents)

12. Iain Morrison Macleod (2 out of 13 patents)

13. Ian Jaffrey (1 out of 5 patents)

14. Alan Craigon (1 out of 2 patents)

15. Philip C G Egleton (1 out of 4 patents)

38 patents: Sort by Forward Citations

1. 10077633 - Downhole apparatus and method (2018-09-18),

2. 10077627 - Downhole apparatus and method (2018-09-18),

3. 9739127 - Method and system for operating a downhole tool, for fracturing a formation and/or for completing a wellbore (2017-08-22),

4. 9702231 - Tubing section (2017-07-11),

5. 9695656 - Shifting tool (2017-07-04),

6. 9677397 - Downhole detection (2017-06-13),

7. 9631458 - Switching device for, and a method of switching, a downhole tool (2017-04-25),

8. 9562411 - Packer (2017-02-07),

9. 9488046 - Apparatus and method for downhole communication (2016-11-08),

10. 9416643 - Selective fracturing system (2016-08-16),

11. 9359890 - Method of and apparatus for completing a well (2016-06-07),

12. 9359842 - Downhole actuating apparatus (2016-06-07),

13. 9200501 - Valve assembly (2015-12-01),

14. 9194213 - Packer (2015-11-24),

15. 9194197 - Mechanical counter (2015-11-24),

Petrowell Limited is a leading oil and gas services company. We specialize in providing drilling and well services to support the exploration and production activities of our clients. With a strong focus on safety, efficiency, and innovation, we deliver high-quality solutions to help our clients maximize their operational performance and optimize their resources. Visit our website to learn more about our services and how we can assist you in achieving your goals.

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

Company Badge

USPTO Data Jan 1 1976 - Sep 15 2026

38 Patents

#6 in Aberdeen

#468 in United Kingdom

#17,791 in the World

Aberdeen, United Kingdom

Petrowell Limited

Forward Citations = 216

28 inventors:

Daniel George Purkis (20 out of 60 patents)

Iain Morrison MacLeod (4 out of 9 patents)

Steve Reid (4 out of 4 patents)

4. Andrew John Elrick (3 out of 15 patents)

5. Damien Gerard Patton (3 out of 9 patents)

Please report any incorrect information to [email protected]

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