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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.
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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 |