|
JPS61197864A
|
|
Failsafe valve actuator
|
|
US4612983A
|
|
Shear type gate valve
|
|
US4643390A
|
|
Fail-safe valve actuator
|
|
US4569503A
|
|
Valve with remote and manual actuation means
|
|
US4552369A
|
|
Stem sealing for high pressure valve
|
|
US4570724A
|
|
Stepwise rotary actuator
|
|
CA1221622A
|
|
Tension hanger embodying fire resistant sealing means
|
|
US4553589A
|
|
Fire-safe surface-controlled subsurface safety valve control line/wellhead connector and blowout preventer
|
|
JPS59200884A
|
|
Normal non-rising stem valve
|
|
EP0117989A1
|
|
Fire resistant connections embodying heat transfer means
|
|
US4627958A
|
|
Densification of metal powder to produce cladding of valve interiors by isodynamic compression
|
|
US4562090A
|
|
Method for improving the density, strength and bonding of coatings
|
|
US4540012A
|
|
Temperature sensitive valve bonnet assembly
|
|
US4534235A
|
|
Rotary stepper actuator
|
|
US4570659A
|
|
Fire resistant valve
|
|
US4511002A
|
|
Multiple tubing hanger tie back system and method
|
|
US4452462A
|
|
Temperature resistant joint packing with E-shaped spring seal
|
|
US4477093A
|
|
Fire resistant connections and T-like sealing means therefor
|
|
US4483545A
|
|
Fire resistant connections and double ribbed sealing means therefor
|
|
US4477092A
|
|
Fire resistant connections and dovetail-like sealing means therefor
|
