Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Subsea wellhead with annulus communicating system










Image Number 2 for United States Patent #4887672.

An improved subsea wellhead including a wellhead housing landed at a subsea well location and having a plurality of hangers landed therein, each of the hangers having a seal assembly to define an annulus in the area between the exterior of the hanger and the interior of the wellhead housing below the seal provided by the seal assembly and a passage in said wellhead housing communicating with each of the annuli, the passages extending through the wellhead housing and communicating with the space above the upper surface of the wellhead housing, a spool connected to the upper end of the wellhead housing, inner and outer seals between the upper end of the wellhead housing and the spool to define the space into which the passages communicate, a passage extending upward through the spool to communicate the pressure changes in the space between the spool and wellhead housing to the surface, and check valves in each of the passages allowing flow upwardly therethrough and preventing flow downwardly therethrough to isolate each of the annuli from the other annuli. In a modified form individual passages with suitable sealing means are provided for each of the wellhead housing passages.








 
 
  Recently Added Patents
Proximity-based mobile message delivery
Display window with level of service graphical user interface
Apparatus, electronic component and method for generating reference voltage
High power insulated gate bipolar transistors
Reuse of static image data from prior image frames to reduce rasterization requirements
Real-time RSL monitoring in a web-based application
Inhibitor of casein kinase 1delta and casein kinase 1E
  Randomly Featured Patents
Golf club wood holder
Recyclable vehicle interior articles and methods of making same
Estrogen or estradiol need determination by vaginal or urethral acidity determination
Method and apparatus for flexible interconnection of computer system components
Douser mounting structure for a photographic camera having a panoramic photographing function
Hydraulic automobile jack system
Semiconductor integrated circuit device and method of design of semiconductor integrated circuit device
Systolic Reed-Solomon decoder
Nonaqueous electrolyte battery
Methods of cleansing dyed hair