Inventor
Craig R. Ivie
Inventor
Houston, TX, US
Overview
Patents· 8 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
E21Bprimary
E21BEarth or rock drilling100%
PatentTitleYear
8,733,475'Drill bit with enhanced hydraulics and erosion-shield cutting teeth'20147,168,506'On-bit, analog multiplexer for transmission of multi-channel drilling information'20076,957,575'Apparatus for weight on bit measurements, and methods of using same'20056,802,215'Apparatus for weight on bit measurements, and methods of using same'20045,096,005'Hydraulic action for rotary drill bits'19925,029,656'Nozzle means for rotary drill bits'19914,989,680'Drill bit having improved hydraulic action for directing drilling fluid'19914,940,099'Cutting elements for roller cutter drill bits'1990Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1990–2005Based in Houston, TX, US· patent location history
1991–1992Patents assigned to CAMCO INT (3)· patent assignee history
2004–2007Based in Spring, TX, US· patent location history
2005–2007Patents assigned to REEDHYCALOG L P (2)· patent assignee history
2014Patents assigned to CARAWAY DOUGLAS (1)· patent assignee history
2014Patents assigned to IVIE CRAIG (1)· patent assignee history
2014Patents assigned to NAT OILWELL DHT LP (1)· patent assignee history
2014Based in Willis, TX, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| CAMCO INT | 3 | 1991–1992 |
| REEDHYCALOG L P | 2 | 2005–2007 |
| CARAWAY DOUGLAS | 1 | 2014 |
| IVIE CRAIGself | 1 | 2014 |
| NAT OILWELL DHT LP | 1 | 2014 |
Locations
| Location | Patents | Span |
|---|---|---|
| Houston, Texas, US | 5 | 1990–2005 |
| Spring, Texas, US | 2 | 2004–2007 |
| Willis, Texas, US | 1 | 2014 |