Stream-Flo Industries Ltd.
42Patents
26Active
42Granted
47Portfolio score
Filing activity: Oct 17, 1995 → Nov 12, 2020 · 14 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6688386B2 | Tubing hanger and adapter assembly | Fixed Constructions | 68 | Expired |
| US6457530B1 | Wellhead production pumping tree | Fixed Constructions | 51 | Expired |
| US6595278B1 | Assembly for locking a polished rod in a pumping wellhead | Fixed Constructions | 35 | Expired |
| US5921276A | Piston-type check valve with diffuser | Emerging Cross-Sectional Technologies | 30 | Expired |
| US6851478B2 | Y-body Christmas tree for use with coil tubing | Fixed Constructions | 27 | Expired |
| US5743332A | Integral wellhead assembly for pumping wells | Fixed Constructions | 20 | Expired |
| US7673674B2 | Polish rod clamping device | Fixed Constructions | 20 | Active |
| US7069987B2 | Casing adapter tool for well servicing | Fixed Constructions | 19 | Expired |
| US7306201B2 | Gate valve with tongue and groove or bridging seal to annular seat elements | Mechanical Engineering; Lighting; Heating | 16 | Expired |
| US7562859B2 | Gate valve with tongue and groove or bridging seal to annular seat elements | Mechanical Engineering; Lighting; Heating | 16 | Active |
| US5765813A | Wellhead production blowout preventer ram | Fixed Constructions | 13 | Expired |
| US6637509B2 | Wellhead stuffing box support assembly | Mechanical Engineering; Lighting; Heating | 13 | Expired |
| US6260817A | Hydraulic blowout preventer assembly for production wellhead | Fixed Constructions | 13 | Expired |
| US7137610B2 | Wellhead production blowout preventer | Fixed Constructions | 12 | Expired |
| US7552765B2 | Wellhead blowout preventer with extended ram for sealing central bore | Fixed Constructions | 12 | Active |
| US8960276B2 | Wellhead seal device to seal casing | Fixed Constructions | 11 | Active |
| US7743824B2 | Method and apparatus for isolating a wellhead for fracturing | Fixed Constructions | 11 | Active |
| US7552762B2 | Method and apparatus to provide electrical connection in a wellhead for a downhole electrical device | Fixed Constructions | 8 | Active |
| US6834718B2 | Casing head connector with landing base | Fixed Constructions | 8 | Expired |
| US8256514B2 | Down-hole actuation device storage apparatus and method for launching | Fixed Constructions | 7 | Active |
| US10801294B2 | Adjustable fracturing manifold module, system and method | Fixed Constructions | 7 | Active |
| US8061419B2 | Casing head slip lock connection for high temperature service | Fixed Constructions | 6 | Active |
| US5799730A | Wellhead casing hanger assembly | Fixed Constructions | 6 | Expired |
| US7410002B2 | Method and apparatus to provide electrical connection in a wellhead for a downhole electrical device | Fixed Constructions | 5 | Expired |
| US6736208B2 | Wellhead production pumping tree with access port | Fixed Constructions | 5 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.