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 Casing Heads C-22/C-29

C-22 Casing Heads use a straight-bore bowl design that prevents damage to sealing areas from drilling tools and prevents test-plug and bowl-protector wedging problems under pressure. This straightbore design also reduces maintenance costs and permits suspension of heavy casing loads. C-22 Casing Heads normally are furnished with 2-inch threaded outlets, but optional sizes and studded outlets are available upon request. Bottom connections can be furnished slip-on-weld, threaded or slip-n-lock. C-22 Casing Heads permit interchangeability of casing hangers C-22 and C-21.

The C-29 Casing Head uses a straight bore based on the same reliable design as the C-22, except the bowl is 2 inches deeper, permiting the acceptance of the minimal-deflection C-29 Casing Hanger.This allows extreme-load casing-hanging capacity compared with the C-22 profile.

FC gate valve FC gate valve
 

  C-22 Casing Head Specifications (API-6A)

Top Flange Size (inches)
Working Pressure (psi)
Casing Size (inches)
Outlet
9"
2,000
7"
2" LP
9"
3,000
7"
2" LP
9"
2,000
7-5/8"
2" LP
9"
3,000
7-5/8"
2" LP
9"
5,000
7-5/8"
2" LP
9"
2,000
8-5/8"
2" LP
9"
3,000
8-5/8"
2" LP
9"
5,000
8-5/8"
2" LP
11"
2,000
8-5/8"
2" LP
11"
3,000
8-5/8"
2" LP
11"
5,000
8-5/8"
2" LP
11"
2,000
9-5/8"
2" LP
11"
3,000
9-5/8"
2" LP
11"
5,000
9-5/8"
2" LP
11"
2,000
10-3/4"
2" LP
11"
3,000
10-3/4"
2" LP
11"
5,000
10-3/4"
2" LP
13-5/8"
2,000
11-3/4"
2" LP
13-5/8"
3,000
11-3/4"
2" LP
13-5/8"
2,000
13-3/8"
2" LP
13-5/8"
3,000
13-3/8"
2" LP
13-5/8"
5,000
13-3/8"
2" LP
16-3/4"
2,000
16"
2" LP
16-3/4"
3,000
16"
2" LP
21-1/4"
2,000
20"
2" LP
20-3/4"
3,000
20"
2" LP
 

  C-29 Casing Head Specifications (API-6A)

Top Flange Size (inches)
Working Pressure (psi)
Casing Size (inches)
Outlet
11"
3,000
8-5/8"
LP/SSO
11"
5,000
8-5/8"
LP/SSO
11"
3,000
9-5/8"
LP/SSO
11"
5,000
9-5/8"
LP/SSO
11"
3,000
10-3/4"
LP/SSO
11"
5,000
10-3/4"
LP/SSO
13-5/8"
3,000
13-3/8"
LP/SSO
13-5/8"
5,000
13-3/8"
LP/SSO
16-3/4"
2,000
16"
LP/SSO
16-3/4"
3,000
16"
LP/SSO
16-3/4"
5,000
16"
LP/SSO
21-1/4"
2,000
20"
LP/SSO
20-3/4"
3,000
20"
LP/SSO
 
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