Dewayne Turner
24Patents
11h-index
17Co-inventors
72Inventor score
Filing activity: Dec 22, 1983 → Jun 14, 2018
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7021389B2 | Bi-directional ball seat system and method | Fixed Constructions | 145 | Expired |
| US7150326B2 | Bi-directional ball seat system and method | Fixed Constructions | 102 | Expired |
| US6405800B1 | Method and apparatus for controlling fluid flow in a well | Fixed Constructions | 59 | Expired |
| US6397949B1 | Method and apparatus for production using a pressure actuated circulating valve | Fixed Constructions | 45 | Expired |
| US6722440B2 | Multi-zone completion strings and methods for multi-zone completions | Fixed Constructions | 36 | Expired |
| US7152678B2 | System and method for downhole operation using pressure activated valve and sliding sleeve | Fixed Constructions | 34 | Expired |
| US7490669B2 | Multi-zone, single trip well completion system and methods of use | Fixed Constructions | 32 | Active |
| US4570714A | Gravel pack assembly | Fixed Constructions | 27 | Expired |
| US7124824B2 | Washpipeless isolation strings and methods for isolation | Fixed Constructions | 22 | Expired |
| US7520333B2 | Hydraulic sleeve valve with position indication, alignment, and bypass | Fixed Constructions | 17 | Active |
| US7845416B2 | Hydraulic sleeve valve with position indication, alignment, and bypass | Fixed Constructions | 14 | Active |
| US7395862B2 | Combination jar and disconnect tool | Fixed Constructions | 10 | Expired |
| US7201232B2 | Washpipeless isolation strings and methods for isolation with object holding service tool | Fixed Constructions | 9 | Expired |
| US7198109B2 | Double-pin radial flow valve | Fixed Constructions | 8 | Expired |
| US7383884B1 | Cross-over tool | Fixed Constructions | 7 | Expired |
| US6981551B2 | Cross-over tool return port cover | Fixed Constructions | 4 | Expired |
| US7665526B2 | System and method for downhole operation using pressure activated and sleeve valve assembly | Fixed Constructions | 3 | Active |
| US7210535B2 | Isolation system comprising a plug and a circulation valve and method of use | Fixed Constructions | 2 | Expired |
| USRE40648E1 | System and method for downhole operation using pressure activated valve and sliding sleeve | General | 2 | Active |
| US7980315B2 | System and method for selectively communicatable hydraulic nipples | Fixed Constructions | 2 | Active |
| US7497265B2 | Reclosable mechanical annular flow valve | Fixed Constructions | 2 | Expired |
| US10612346B2 | Concentric flow valve | Fixed Constructions | 1 | Active |
| US7810575B2 | Isolation system comprising a plug and a circulation valve and method of use | Fixed Constructions | 0 | Active |
| US8157017B2 | Method and apparatus for injecting fluid in a wellbore | Fixed Constructions | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.