Welldynamics, Inc.
27Patents
13Active
27Granted
43Portfolio score
Filing activity: Jul 15, 1998 → Oct 11, 2013 · 11 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6575237B2 | Hydraulic well control system | Mechanical Engineering; Lighting; Heating | 77 | Expired |
| US6585051B2 | Hydraulically operated fluid metering apparatus for use in a subterranean well, and associated methods | Mechanical Engineering; Lighting; Heating | 59 | Expired |
| US6470970B1 | Multiplier digital-hydraulic well control system and method | Mechanical Engineering; Lighting; Heating | 54 | Expired |
| US7357021B2 | Methods of monitoring downhole conditions | Physics | 44 | Expired |
| US7242103B2 | Downhole electrical power generator | Electricity | 36 | Expired |
| US7861788B2 | Casing valves system for selective well stimulation and control | Fixed Constructions | 32 | Active |
| US6659184B1 | Multi-line back pressure control system | Fixed Constructions | 29 | Expired |
| US6995683B2 | System and method for transmitting downhole data to the surface | Fixed Constructions | 28 | Expired |
| US7013980B2 | Hydraulically actuated control system for use in a subterranean well | Fixed Constructions | 23 | Expired |
| US7950461B2 | Screened valve system for selective well stimulation and control | Fixed Constructions | 22 | Active |
| US7145471B2 | Sequential hydraulic control system for use in a subterranean well | Mechanical Engineering; Lighting; Heating | 19 | Expired |
| US7322421B2 | Fiber optic deployment apparatus and method | Electricity | 16 | Expired |
| US7503385B2 | Single line control module for well tool actuation | Fixed Constructions | 16 | Active |
| US7218820B2 | Method and system for providing a hydrogen diffusion barrier for fiber optic cables used in hostile environments | Physics | 15 | Expired |
| US7210856B2 | Distributed temperature sensing in deep water subsea tree completions | Fixed Constructions | 14 | Expired |
| US7779912B2 | Well tool having magnetically coupled position sensor | Fixed Constructions | 13 | Active |
| US7673683B2 | Well tool having magnetically coupled position sensor | Fixed Constructions | 7 | Active |
| US7484566B2 | Pulse width modulated downhole flow control | Fixed Constructions | 7 | Active |
| US7240737B2 | Direct proportional surface control system for downhole choke | Fixed Constructions | 6 | Expired |
| US7836956B2 | Positional control of downhole actuators | Mechanical Engineering; Lighting; Heating | 5 | Active |
| US7191828B2 | Hydraulically set concentric packer with multiple umbilical bypass through the piston | Fixed Constructions | 5 | Expired |
| US9033054B2 | Metal to metal seal for downhole tools | Fixed Constructions | 4 | Active |
| US8196656B2 | Position sensor for well tools | Fixed Constructions | 3 | Active |
| US7730956B2 | Downhole pressure balanced electrical connections | Fixed Constructions | 2 | Active |
| US9464507B2 | Casing valves system for selective well stimulation and control | Fixed Constructions | 1 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.