Inventor
John D. Roberts
Inventor
Spring, TX, US
Overview
Patents· 17 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
E21Bprimary
E21BEarth or rock drilling100%
PatentTitleYear
7,513,305'Apparatus and methods for operating a tool in a wellbore'20097,195,069'Method and apparatus for backing off a tubular member from a wellbore'20077,073,580'Inflation tool with real-time temperature and pressure probes'20066,886,631'Inflation tool with real-time temperature and pressure probes'20056,695,056'System for forming a window and drilling a sidetrack wellbore'20046,547,006'Wellbore liner system'20036,374,918'In-tubing wellbore sidetracking operations'20026,334,487'Valve assembly'20026,209,636'Wellbore primary barrier and related systems'20016,202,752'Wellbore milling methods'20016,116,336'Wellbore mill system'20006,070,670'Movement control system for wellbore apparatus and method of controlling a wellbore tool'20006,070,665'Wellbore milling'20006,039,118'Wellbore tool movement control and method of controlling a wellbore tool'20005,887,655'Wellbore milling and drilling'19995,620,051'Whipstock'19975,522,461'Mill valve'1996Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1996–1997Patents assigned to WEATHERFORD US INC (2)· patent assignee history
1996–2009Based in Spring, TX, US· patent location history
1999–2009Patents assigned to WEATHERFORD LAMB (14)· patent assignee history
2002Based in TX, US· patent location history
2007Based in Magnolia, TX, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| WEATHERFORD LAMB | 14 | 1999–2009 |
| WEATHERFORD US INC | 2 | 1996–1997 |
Locations
| Location | Patents | Span |
|---|---|---|
| Spring, Texas, US | 15 | 1996–2009 |
| Magnolia, Texas, US | 1 | 2007 |
| Texas, US | 1 | 2002 |