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Houston, TX, United States of America

Dowell, a Division of Schlumberger Technology Corporation

USPTO Granted Patents = 28

Forward Citations = 2,300

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48 inventors (with patents filed for the assignee):

Erik B Nelson (4 out of 40 patents)

Vernon G Constien (4 out of 19 patents)

Pierre Maroy (3 out of 15 patents)

4. Roger J Card (3 out of 11 patents)

5. Jean-Pierre Feraud (3 out of 6 patents)

6. Robert M Sorem (3 out of 17 patents)

7. David Milton Eslinger (2 out of 66 patents)

8. Larry J Leising (2 out of 10 patents)

9. Paul R Howard (2 out of 20 patents)

10. L Michael McKee (2 out of 26 patents)

11. Christopher Alan Sawdon (2 out of 25 patents)

12. Lawrence James Leising (2 out of 27 patents)

13. Denis Doremus (2 out of 2 patents)

14. Trevor Lloyd Hughes (1 out of 53 patents)

15. J Ernest Brown (1 out of 41 patents)

28 patents: Sort by Forward Citations

1. 5962375 - Wellbore fluids (1999-10-05),

2. 5929002 - Fluid loss control (1999-07-27),

3. 5846913 - Invert biodegradable n-alkane(s) wellbore fluid containing less than 10 (1998-12-08),

4. 5828003 - Composite coiled tubing apparatus and methods (1998-10-27),

5. 5821203 - Foamed drilling fluids, their process for preparation and the (1998-10-13),

6. 5730222 - Downhole activated circulating sub (1998-03-24),

7. 5720598 - Method and a system for early detection of defects in multiplex positive (1998-02-24),

8. 5697441 - Selective zonal isolation of oil wells (1997-12-16),

9. 5685574 - Snap latch seal locator for sealingly latching tubing to a packer in a (1997-11-11),

10. 5660241 - Pressure compensated weight on bit shock sub for a wellbore drilling tool (1997-08-26),

11. 5613555 - Inflatable packer with wide slat reinforcement (1997-03-25),

12. 5582250 - Overbalanced perforating and fracturing process using low-density, (1996-12-10),

13. 5573225 - Means for placing cable within coiled tubing (1996-11-12),

14. 5557103 - Method of analyzing drilling fluids (1996-09-17),

15. 5551516 - Hydraulic fracturing process and compositions (1996-09-03),

Dowell is a division of Schlumberger Technology Corporation, a leading provider of technology services to the global oil and gas industry. Dowell specializes in well services, offering a comprehensive range of solutions to optimize well productivity, reservoir performance, and ultimate recovery. With a strong focus on innovation and efficiency, Dowell helps operators maximize their asset value through advanced technologies and industry expertise.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 30 2025

28 Patents

#188 in Houston, TX

#670 in Texas

#11,606 in US

#22,560 in the World

Houston, TX, United States of America

Dowell, a Division of Schlumberger Technology Corporation

Forward Citations = 2,300

48 inventors:

Erik B Nelson (4 out of 40 patents)

Vernon G Constien (4 out of 19 patents)

Pierre Maroy (3 out of 15 patents)

4. Roger J Card (3 out of 11 patents)

5. Jean-Pierre Feraud (3 out of 6 patents)

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