Wood Group ESP, Inc.
37Patents
5Active
37Granted
40Portfolio score
Filing activity: Jun 14, 1999 → Mar 21, 2007 · 5 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7461692B1 | Multi-stage gas separator | Fixed Constructions | 40 | Active |
| US6602059B1 | Electric submersible pump assembly with tube seal section | Mechanical Engineering; Lighting; Heating | 39 | Expired |
| US7208855B1 | Fiber-optic cable as integral part of a submersible motor system | Electricity | 37 | Expired |
| US6547003B1 | Downhole rotary water separation system | Fixed Constructions | 36 | Expired |
| US7841826B1 | Slag reduction pump | Emerging Cross-Sectional Technologies | 31 | Active |
| US6450782B1 | Pump-motor assembly having a motor mount | Mechanical Engineering; Lighting; Heating | 31 | Expired |
| US6595295B1 | Electric submersible pump assembly | Fixed Constructions | 29 | Expired |
| US6457522B1 | Clean water injection system | Fixed Constructions | 28 | Expired |
| US7462225B1 | Gas separator agitator assembly | Fixed Constructions | 21 | Active |
| US7066248B2 | Bottom discharge seal section | Mechanical Engineering; Lighting; Heating | 19 | Expired |
| US6396415B1 | Method and system of communicating in a subterranean well | Electricity | 18 | Expired |
| US6598681B1 | Dual gearbox electric submersible pump assembly | Fixed Constructions | 15 | Expired |
| US6461115B1 | Suction chamber for a horizontal pumping system | Mechanical Engineering; Lighting; Heating | 14 | Expired |
| US6457531B1 | Water separation system with encapsulated electric submersible pumping device | Fixed Constructions | 14 | Expired |
| US7174957B1 | Magnetic bailer | Performing Operations; Transporting | 13 | Expired |
| US6837621B1 | Rotor bearing for increased lubricant flow | Mechanical Engineering; Lighting; Heating | 12 | Expired |
| US7069985B2 | Leakage resistant shroud hanger | Fixed Constructions | 11 | Expired |
| US7086473B1 | Submersible pumping system with sealing device | Mechanical Engineering; Lighting; Heating | 11 | Expired |
| US6561775B1 | In situ separable electric submersible pump assembly with latch device | Mechanical Engineering; Lighting; Heating | 10 | Expired |
| US6666269B1 | Method and apparatus for producing fluid from a well and for limiting accumulation of sediments in the well | Emerging Cross-Sectional Technologies | 9 | Expired |
| US6468058B1 | Submersible concatenated system | Electricity | 9 | Expired |
| US6684956B1 | Method and apparatus for producing fluids from multiple formations | Fixed Constructions | 9 | Expired |
| US6225720A | Self-lubricating bearing | Electricity | 8 | Expired |
| US7343967B1 | Well fluid homogenization device | Fixed Constructions | 8 | Expired |
| US7150600B1 | Downhole turbomachines for handling two-phase flow | Fixed Constructions | 8 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.