Casing Head
The casing head is a part of connecting casing and a variety of wellhead devices to support the gravity of intermediate casing and oil string, seal the annular space of oil pipe and casing, and resist a variety of media corrosion. It supports transitional connection for installing the upper wellhead devices, such as the BOP, tubing head, and Christmas tree and so on. It also could squeeze cement through side outlets of the casing head, monitor well sinking, and inject balance fluid and other operations.
The parameters description as below:
Rated pressure | 2000 , 3000, 5000, 10000, 15000, 20000 ( Psi) |
Grading norms | PSL1 , PSL2, PSL3, PSL4 |
Performance rating | PR1 , PR2 |
Temperature rating | K (-60~ 82 oC), L(-46~ 82 oC), P ( -29~ 82 oC), R ( room temperature), S ( -18~ 66 oC), T( -18~ 82 oC), U (-18~ 121 oC), V (2~ 121 oC), |
Material grade | AA (general use ) BB (general use) CC (general use) DD (acidic environment) EE (acidic environment) FF(acidic environment ) |
The application of the medium | Crude oil, water, natural gas, mud, etc. |
Type of connection | The connecting type of casing head and surface casing is weld, thread and slip type.
Matched casing hanger structural type: slip, thread (mandrel);
The connecting type of side outlet includes thread, bolted flange and flange.
In the bottom of casing head and casing spool sets casing secondary seal mechanism and sealing test port. |
