For the Inventor, By the Inventor

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Calgary, Canada

Xact Downhole Telemetry, Inc.

USPTO Granted Patents = 15

% Expired Patents = 20.0

CIPO Patents = 6

EPO Patents = 4

Forward Citations = 170

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12 inventors (with patents filed for the assignee):

Paul L Camwell (12 out of 29 patents)

James M Neff (6 out of 7 patents)

Douglas S Drumheller (5 out of 17 patents)

4. David D Whalen (4 out of 7 patents)

5. Derek W Logan (3 out of 21 patents)

6. John-Peter Van Zelm (2 out of 25 patents)

7. John Godfrey McRory (2 out of 11 patents)

8. Anthony Robert Dopf (2 out of 17 patents)

9. Celine J Martineau (1 out of 3 patents)

10. Edwin I Hildebrandt (1 out of 1 patent)

11. Andrzej M Sendyk (1 out of 1 patent)

12. Wendall Siemens (1 out of 5 patents)

13. John G Mcrory (0 patent)

14. Wendall L Siemens (0 patent)

15. Derek William Logan (0 patent)

15 patents: Sort by Forward Citations

1. 10103846 - Robust telemetry repeater network system and method (2018-10-16),

2. 10060255 - Downhole low rate linear repeater relay network timing system and method (2018-08-28),

3. 9797241 - Acoustic transmitter for transmitting a signal through a downhole medium (2017-10-24),

4. 9458712 - Acoustic telemetry stacked-ring wave delay isolator system and method (2016-10-04),

5. 8982667 - Acoustic telemetry stacked-ring wave delay isolator system and method (2015-03-17),

6. 8922387 - Tapered thread EM gap sub self-aligning means and method (2014-12-30),

7. 8823543 - Telemetry wave detection apparatus and method (2014-09-02),

8. 8393412 - System and method for accurate wellbore placement (2013-03-12),

9. 8270251 - Acoustic isolator (2012-09-18),

10. 8115651 - Drill string telemetry methods and apparatus (2012-02-14),

11. 8022840 - Telemetry transmitter optimization using time domain reflectometry (2011-09-20),

12. 7928861 - Telemetry wave detection apparatus and method (2011-04-19),

13. 7872945 - Dynamic efficiency optimization of piezoelectric actuator (2011-01-18),

14. 7817061 - Telemetry transmitter optimization using time domain reflectometry (2010-10-19),

15. 6956791 - Apparatus for receiving downhole acoustic signals (2005-10-18),

Xact Downhole Telemetry, Inc. is a Calgary-based company specializing in advanced telemetry solutions for the oil and gas industry. The organization focuses on developing innovative technologies that enhance data transmission and monitoring capabilities in downhole environments. By leveraging cutting-edge engineering and research, Xact aims to improve operational efficiency and safety in drilling operations. Their expertise in telemetry systems positions them as a key player in the evolving landscape of energy exploration and production.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Sep 29 2026

15 Patents

#72 in Calgary

#982 in Canada

#39,860 in the World

Calgary, Canada

Xact Downhole Telemetry, Inc.

Forward Citations = 170

12 inventors:

Paul L Camwell (12 out of 29 patents)

James M Neff (6 out of 7 patents)

Douglas S Drumheller (5 out of 17 patents)

4. David D Whalen (4 out of 7 patents)

5. Derek W Logan (3 out of 21 patents)

Please report any incorrect information to [email protected]

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