The casing head in a conventional wellhead system is the lowest part of the wellhead assembly and is almost always connected to the surface casing string. It supports the remaining parts of the wellhead and completion equipment.
The casing head performs the following functions:
- Provides a means for attachment to the surface casing string
- Allows for suspending the next casing string, usually the first intermediate string in the well
- Supports the blowout preventers (BOP) while drilling
- Provides outlets for fluid returns
- Provides a means to test the blowout preventers (BOP) while drilling
- May provide a test port for testing welded or other non-threaded bottom casing head connections
- May also be referred to by the following names, ”A-Section”, ”Braden Head”or ”Starting Head”
Casing Head Components
C-22 Casing Heads
Yancheng Cyber casing heads incorporate the industry workhorse C-22 geometry that will accept a standard C-21 or C-22 casing hanger. Additionally, C-22 casing head product line has been engineered with the option to integrate full sets of lock-down screws (LDS) in the upper flange in order to provide mechanical casing hanger retention and/or pack-off actuation.
- The C-22 casing head is designed for light to intermediate casing string weights
- It incorporates a straight bowl design
- Is available with Lock Down Screws (LDS) in the upper flange for mechanical casing hangerretention
- Can utilize Bowl Protector lockdown screws
- It may be equipped with or without a base plate
- Available in multiple bottom connection configurations including Slip-Lock
Bowl | Top Flange | WP | Bottom Connection (Threaded or SOW) | Outlet Size | PSL Levels | Material Class |
C-22 | 7″ | 3K, 5K | 4-1/2″ thru 7″ | LP or Studded | PSL 1 thru 3 | AA, EE, FF |
C-22 | 9″ | 3K, 5K | 4-1/2″ thru 8-5/8″ | LP or Studded | PSL 1 thru 3 | AA, EE, FF |
C-22 | 11″ | 3K, 5K | 8-5/8″ thru 10-3/4″ | LP or Studded | PSL 1 thru 3 | AA, EE, FF |
C-22 | 13-5/8″ | 3K, 5K | 11-3/4″ thru 13-3/8″ | LP or Studded | PSL 1 thru 3 | AA, EE, FF |
C-22 | 16-3/4″ | 3K, 5K | 16″ | LP or Studded | PSL 1 thru 3 | AA, EE, FF |
C-22 | 18-5/8″ | 5K | 18-5/8″ | LP or Studded | PSL 1 thru 3 | AA, EE, FF |
C-22 | 20-3/4″ | 3K | 20″ | LP or Studded | PSL 1 thru 3 | AA, EE, FF |
C-22 | 21-1/4″ | 3K, 5K | 20″ | LP or Studded | PSL 1 thru 3 | AA, EE, FF |