David Hosie
28Patents
17h-index
38Co-inventors
81Inventor score
Filing activity: Oct 11, 1995 → May 20, 2015
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6129152A | Rotating bop and method | Fixed Constructions | 119 | Expired |
| US6209663A | Underbalanced drill string deployment valve method and apparatus | Fixed Constructions | 111 | Expired |
| US5603384A | Universal perforating gun firing head | Fixed Constructions | 98 | Expired |
| US6732804B2 | Dynamic mudcap drilling and well control system | Fixed Constructions | 78 | Expired |
| US6837313B2 | Apparatus and method to reduce fluid pressure in a wellbore | Fixed Constructions | 72 | Expired |
| US7086481B2 | Wellbore isolation apparatus, and method for tripping pipe during underbalanced drilling | Fixed Constructions | 71 | Expired |
| US7219729B2 | Permanent downhole deployment of optical sensors | Fixed Constructions | 67 | Expired |
| US7255173B2 | Instrumentation for a downhole deployment valve | Fixed Constructions | 54 | Expired |
| US7350590B2 | Instrumentation for a downhole deployment valve | Fixed Constructions | 51 | Expired |
| US6834726B2 | Method and apparatus to reduce downhole surge pressure using hydrostatic valve | Fixed Constructions | 48 | Expired |
| US6082707A | Valve seat and method | Mechanical Engineering; Lighting; Heating | 48 | Expired |
| US6595289B2 | Method and apparatus for plugging a wellbore | Fixed Constructions | 42 | Expired |
| US7475732B2 | Instrumentation for a downhole deployment valve | Fixed Constructions | 41 | Active |
| US7413018B2 | Apparatus for wellbore communication | Fixed Constructions | 40 | Expired |
| US6736210B2 | Apparatus and methods for placing downhole tools in a wellbore | Fixed Constructions | 24 | Expired |
| US7172027B2 | Expanding tubing | Fixed Constructions | 24 | Expired |
| US6896052B2 | Expanding tubing | Fixed Constructions | 17 | Expired |
| US7000692B2 | Apparatus and methods for placing downhole tools in a wellbore | Fixed Constructions | 16 | Expired |
| US7997340B2 | Permanent downhole deployment of optical sensors | Fixed Constructions | 14 | Active |
| US7730968B2 | Apparatus for wellbore communication | Fixed Constructions | 12 | Active |
| US7178592B2 | Closed loop multiphase underbalanced drilling process | Fixed Constructions | 10 | Expired |
| US7665543B2 | Permanent downhole deployment of optical sensors | Fixed Constructions | 10 | Active |
| US7395877B2 | Apparatus and method to reduce fluid pressure in a wellbore | Fixed Constructions | 9 | Active |
| US7513305B2 | Apparatus and methods for operating a tool in a wellbore | Fixed Constructions | 7 | Expired |
| US7111692B2 | Apparatus and method to reduce fluid pressure in a wellbore | Fixed Constructions | 5 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.