Oil Wellhead Equipment, Casing Head Assembly, Casing Hanger, Casing
Housing
The casing head is a kind of part connecting casings and wellheads.
It is used as supporting the weight of technical casing and
production casing, sealing the annular space between the casings,
and installing BOP stacks. It provides a transition joint for the
tubing head, Christmas tree and other wellheads. It can also supply
cement, monitor and control well’s sinking, and inject balance
liquids etc by the two side outlets on the casing head housing.
The casing head is a standard structure, the casing hanger fits
well with the casing housing, and the casing hanger of different
sizes are available according to the casing procedure and the
change of well head conditions. The standard casing head’s top
connection is API 6B or API 6BX flange.
The options of the casing head are as follows:
The bottom connection of the casing head is either API round box
thread and API buttress box thread. It can also be slip type
connection.
It can be provided with weld supporting base plate.
Side outlets could be pipeline thread or studded, studded side
outlet is machined with female thread for connecting R1 1/2’’
reversing valve.
All kinds of tools for casing head equipment, such as wear bushing
assembly, bowl protector running and retrieving tools, and tests
are also available in our works.
The casing heads have a straight bore bowl with 45° landing
shoulder design which avoids damage to sealing areas by drilling
tools and prevents test plug and bowl protector wedging problems
when pressure is applied.
Casing heads are normally furnished with threaded outlets and
studded outlets are available upon request. Bottom connections can
be furnished threaded or slip-on for welding.
Specification for single wellhead
Connected Casing OD
in (mm) | Casing hanger OD
in (mm) | Working Pressure
psi (Mpa) | Vertical Bore
mm |
| 7 5/8'' (193.7) | 4 1/2 (114.3) | 2000 (14)
3000 (21)
5000 (35)
10000 (70)
15000 (105)
20000 (140) | 178 |
| 1 5/8 (244.5) | 5 (127.0) | 230 |
| 5 1/2 (139.7) |
| 7 (177.8) |
| 10 3/4 (273.0) | 5 1/2 (139.7) | 254 |
| 7 (177.8) |
| 11 3/4 (298.4) | 5 1/2 (139.7) | 280 |
| 7 5/8 (193.7) |
| 12 3/4 (323.8) | 5 1/2 (139.7) | 308 |
| 13 3/8 (339.7) | 5 1/2 (139.7) | 318 |
| 7 (177.8) |
| 7 5/8 (193.7) |
9 5/8 (244.5) |
Specification for single wellhead
Connected Casing OD
in | Casing hanger OD
in | Working Pressure
psi (Mpa) | Side Outlet Stud | Vertical Bore
mm |
| Bottom Hanger | Top Hanger | Top | Bottom |
| 13 3/8 | 9 5/8 | 7 | 2000 (14)
3000 (21)
5000 (35)
10000 (70)
15000 (105)
20000 (140) | 1 13/16
2 1/16
2 9/16
3 1/16 | 230 | 318 |
| 5 1/2 |
| 5 |
| 7 5/8 | 5 1/2 | 178 | 318 |
| 5 |
| 7 | 5 1/2 | 164 | 318 |
