David Durward Szarka

This inventor holds 61 USPTO granted patents, plus 10 CIPO patents and 5 EPO patents, primarily in Subterranean Technology (CPC class E21B). Top assignees: Halliburton Company, Halliburton Energy Services, Inc., Conocophillips Company. Active years: 1981-2016.

IDiyas Innovation Intelligence. (2026). Inventor Profile: David Durward Szarka. Retrieved from https://idiyas.com/inventor/david-durward-szarka

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 61

% Patents Active = 86.9

CIPO Patents = 10

EPO Patents = 5 (Patent Applications = 6)

Average Co-Inventor Count = 1.9

ph-index = 32

Forward Citations = 2,496(Granted Patents)

Forward Citations (Not Self Cited) = 2,328(Dec 10, 2025)

Inventors with similar research interests:

Company Filing History:

Halliburton Energy Services, Inc.

patents

1 out of 990

Conocophillips Company

patents

where one patent can have more than one assignee

Years Active: 1981-2016

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Areas of Expertise:

Cementing Operations

Downhole Systems

Plug Mechanisms

Well Completion

Casing Annulus

Inflation Packer

Diverter Plugs

Pressure Activated Systems

Internal Retention

Hydraulic Set Hanger

Fracture Oriented Completion

Well Jetting

61 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 9284795 - Riser displacement and cleaning systems and methods of use (2016-03-15),

2. 9238954 - Pressure activated down hole systems and methods (2016-01-19),

3. 9169721 - Expansion tool for non-cemented casing-casing annulus (CCA) wellbores (2015-10-27),

4. 9109437 - Method of using an expansion tool for non-cemented casing annulus (CCA) wellbores (2015-08-18),

5. 9033056 - Pressure activated down hole systems and methods (2015-05-19),

6. 8967255 - Subsurface release cementing plug (2015-03-03),

7. 8474530 - Method and apparatus for a high side orienting sub for multi-lateral installations (2013-07-02),

8. 8267174 - Internal retention mechanism (2012-09-18),

9. 7686092 - Plug systems and methods for using plugs in subterranean formations (2010-03-30),

10. 7673688 - Casing wiping dart with filtering layer (2010-03-09),

11. 7665520 - Multiple bottom plugs for cementing operations (2010-02-23),

12. 7584792 - Plug systems and methods for using plugs in subterranean formations (2009-09-08),

13. 7533729 - Reverse cementing float equipment (2009-05-19),

14. 7506686 - Diverter plugs for use in well bores and associated methods of use (2009-03-24),

15. 7350578 - Diverter plugs for use in well bores and associated methods of use (2008-04-01),

Title: The Innovative Journey of David Durward Szarka

Introduction: David Durward Szarka, a talented inventor hailing from Duncan, Oklahoma, has made significant contributions to the world of innovations with his creative mind and dedication to problem-solving.

Latest Patents: David Durward Szarka holds several patents in various fields, showcasing his versatility and ingenuity in inventing new solutions to complex challenges.

Career Highlights: Throughout his career, David Durward Szarka has demonstrated a keen ability to identify gaps in the market and develop groundbreaking inventions to fill those voids. His passion for innovation has led to the creation of several successful products that have improved the lives of many.

Collaborations: David Durward Szarka has collaborated with leading experts in the industry, including researchers, engineers, and scientists, to bring his inventions to life. These collaborations have been instrumental in the success of his projects and have helped him push the boundaries of what is possible.

Conclusion: In conclusion, David Durward Szarka's innovative spirit and relentless drive to create have established him as a respected figure in the world of inventions. His contributions have left a lasting impact on various industries, and his legacy as an inventor continues to inspire future generations to think outside the box and pursue their innovative ideas.

Profile summary based on public USPTO records.