Inventor
Anthony R. Dopf
Inventor
Calgary, CA
Overview
Patents· 17 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
E21Bprimary
E21BEarth or rock drilling52%
F16LPipes12%
G01VGeophysics12%
H01RElectrically-conductive connections12%
Y10TTechnical subjects covered by former us classification8%
H02KDynamo-electric machines4%
PatentTitleYear
9,022,144'Drill bit assembly having electrically isolated gap joint for measurement of reservoir properties'20158,648,733'Electromagnetic telemetry assembly with protected antenna'20148,634,274'Spindle for mud pulse telemetry applications'20148,624,464'Brush and brush housing arrangement to mitigate hydrodynamic brush lift in fluid-immersed electric motors'20148,308,199'Electrical isolation connector for electromagnetic gap sub'20128,270,251'Acoustic isolator'20128,174,929'Spindle for mud pulse telemetry applications'20127,900,968'Electrical isolation connector for electromagnetic gap sub'20117,839,719'Fluid erosion protection washer for rotating shaft in MWD tool'20107,821,178'Brush and brush housing arrangement to mitigate hydrodynamic brush lift in fluid-immersed electric motors'20107,532,540'Fluid erosion protection washer for rotating shaft in MWD tool'20096,956,791'Apparatus for receiving downhole acoustic signals'20056,902,414'Harsh environment rotatable connector'20056,572,152'Subassembly electrical isolation connector for drill rod'20036,367,323'Dynamic pressure device for oil drill systems'20026,158,532'Subassembly electrical isolation connector for drill rod'20006,050,353'Subassembly electrical isolation connector for drill rod'2000Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2000–2003Patents assigned to RYAN ENERGY TECHNOLOGIES INC (4)· patent assignee history
2000–2014Based in Calgary, CA· patent location history
2010–2015Patents assigned to SCHLUMBERGER TECHNOLOGY CORP (9)· patent assignee history
2012–2015Patents assigned to DOPF ANTHONY R (7)· patent assignee history
2012–2014Patents assigned to CAMWELL PAUL L (5)· patent assignee history
2012–2015Patents assigned to LOGAN DEREK W (5)· patent assignee history
2015Based in Bragg Creek, CA· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| SCHLUMBERGER TECHNOLOGY CORP | 9 | 2010–2015 |
| DOPF ANTHONY Rself | 7 | 2012–2015 |
| CAMWELL PAUL L | 5 | 2012–2014 |
| LOGAN DEREK W | 5 | 2012–2015 |
| RYAN ENERGY TECHNOLOGIES INC | 4 | 2000–2003 |
Locations
| Location | Patents | Span |
|---|---|---|
| Calgary, CA | 16 | 2000–2014 |
| Bragg Creek, CA | 1 | 2015 |