C-21 Casing Hangers

The GBI C-21 Casing Hanger is a wrap-around, slip-type hanger engineered for reliable performance in lightweight casing load applications. As a non-automatic sealing solution, it is designed to be used with a separate seal assembly, providing flexibility for various wellhead configurations. Its simple, robust design ensures secure casing support in a wide range of operational scenarios.

Key Features and Applications

The C-21 is engineered to provide a secure, cost-effective solution for specific wellhead applications. Its design offers operational flexibility through a non-automatic sealing system, is optimized for lightweight casing loads, and ensures simple, fast installation. With a successful track record spanning more than three decades, the C-21 is a trusted and reliable component for wellhead manufacturers and service facilities globally.

Non-Automatic Sealing System
Designed for Lightweight Casing Loads
Wrap-Around Installation
Field-Proven Reliability

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The H-Packoff Seal Assembly

The C-21 Casing Hanger is designed to work in conjunction with the H-Packoff, its corresponding seal assembly. The H-Packoff creates the necessary seal on the inside and outside diameter of the casing hanger recess. This two-part system provides a reliable, non-automatic seal that is energized separately from the casing hanger slips. We offer H-Packoff assemblies in a full range of standard API casing sizes to complete your C-21 installation.

C-21 Casing Hanger and H-Packoff Specifications

Below are the detailed specifications and part numbers for our C-21 Casing Hangers and the associated H-Packoff seal assemblies. All sizes are available as API Monogrammed or Non-Monogrammed and in a full range of material classes and temperature ratings to meet your project requirements.

C21 Casing Hanger Specifications

All sizes are available API Monogrammed, PSL 1-3, Material class AA, BB, CC, DD, EE, FF, HH

Size	GBI Part #
7” x 2-3/8”	A2333
7” x 2-7/8”	A2334
7” x 3-1/2”	A2335
7” x 4-1/2”	A4781
9” x 2-3/8”	A2197
9” x 2-7/8”	A2198
9” x 3-1/2”	A2199
9” x 4”	A2194
9” x 4-1/2”	A2196
9” x 5”	A2200
9” x 5-1/2”	A2201
11” x 2-3/8”	H2976*
11” x 2-7/8”	H2977*
11” x 3-1/2”	H2978*
11” x 4”	H2206*
11” x 4-1/2	H2133*
11” x 5”	H2208*
11” x 5-1/2”	H2134*
11” x 5-3/4”	H2136*
11” x 6”	H2209*

Size	GBI Part #
11” x 6-5/8”	H2205*
11” x 7”	H2211*
11” x 7-1/4”	TBA
11” x 7-5/8”	H2213*
11” x 7-3/4”	H2214*
13-5/8” x 4-1/2”	H2281*
13-5/8” x 5”	H2579*
13-5/8” x 5-1/2”	H2282*
13-5/8” x 7”	H2283*
13-5/8” x 7-5/8”	H2284*
13-5/8” x 7-3/4”	H2289*
13-5/8” x 8-5/8”	H2286*
13-5/8” x 9-5/8”	H2287*
13-5/8” x 9-3/4”	H2288*
13-5/8” x 9-7/8”	H2138*
13-5/8” x 10-3/4”	A2210
16-3/4” x 6-5/8 & 7”	A2223
16-3/4” x 7-5/8”	A2571
16-3/4” x 9-5/8”	A2586
16-3/4” x 10-3/4”	A2587

Size	GBI Part #
16-3/4” x 11-3/4”	A2588
16-3/4” x 11-7/8”	A2593
16-3/4” x 12-3/4”	A2596
16-3/4” x 13-3/8”	A2215
16-3/4” x 13-5/8”	A2598
18-3/4” x 13-3/8”	A2599
18-3/4” x 13-5/8”	TBA
21-1/4” x 9-5/8”	A2604
21-1/4” x 10-3/4”	A2589
21-1/4” x 11-3/4”	A2590
21-1/4” x 13-3/8”	A2591
21-1/4” x 13-5/8”	A2592
21-1/4” x 14”	A4771
21-1/4” x 16”	A2930
21-1/4” x 16-3/4”	A2139
24” x 18-5/8”	A2581
26” x 16”	A2573
26” x 18-5/8”	A2911
26” x 20”	A2141
30” x 24”	A2142

H Packoff Sizes for C-21 Casing Hangers Specifications

All sizes are available API Monogrammed, PSL 1-3, Material class AA, BB, CC, DD, EE, FF, HH

Size	GBI Part #
7” x 2-3/8”	A2371
7” x 2-7/8”	A2372
7” x 3-1/2”	A2373
7” x 4-1/2”	A2374
9” x 4-1/2”	A2226
9” x 5”	A2225
9” x 5-1/2”	A2227
11” x 2-3/8”	A2972
11” x 2-7/8”	A2971
11” x 3-1/2”	A2973
11” x 4”	A2228
11” x 4-1/2	A2229
11” x 5”	A2231
11” x 5-1/2”	A2232
11” x 5-3/4”	A2237
11” x 6”	A2224
11” x 6-5/8”	A2230
11” x 7”	A2233

Size	GBI Part #
11” x 7-5/8”	A2234
11” x 7-3/4”	A2217
13-5/8” x 2-3/8”	A2301
13-5/8” x 2-7/8”	A2302
13-5/8” x 3-1/2”	A2303
13-5/8” x 4-1/2”	A2356
13-5/8” x 5-1/2”	A2357
13-5/8” x 7”	A2358
13-5/8” x 7-5/8”	A2359
13-5/8” x 7-3/4”	A2352
13-5/8” x 8-5/8”	A2360
13-5/8” x 9-5/8”	A2361
13-5/8” x 9-3/4”	A2351
13-5/8” x 9-7/8”	A2239
13-5/8” x 10-3/4”	A2235
16-3/4” x 7”	A2369
16-3/4” x 7-5/8”	A2377
16-3/4” x 9-5/8”	A2362

Size	GBI Part #
16-3/4” x 10-3/4”	A2363
16-3/4” x 11-3/4”	A2364
16-3/4” x 11-7/8”	A2368
16-3/4” x 12-3/4”	A2220
16-3/4” x 13-3/8”	A2280
16-3/4” x 13-5/8”	A2275
21-1/4” x 9-5/8”	A2375
21-1/4” x 10-3/4”	A2365
21-1/4” x 11-3/4”	A2366
21-1/4” x 13-3/8”	A2367
21-1/4” x 13-5/8”	A2285
21-1/4” x 16”	A2909
21-1/4” x 16-3/4”	A2242
24” x 18-5/8”	A2583
26” x 18-5/8”	A2914
26” x 20”	A2243
30” x 24”	A2244

Request a Quote for C-21 Casing Hangers

Our team is ready to supply the C-21 Casing Hanger and H-Packoff assembly for your lightweight casing applications. Contact us today to discuss your specifications and receive a detailed quote.

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FAQs

What is the primary application for a C-21 casing hanger?

The C-21 is primarily used in surface wellhead systems for shallow wells or other applications with lightweight casing strings where a simple, reliable, non-automatic sealing solution is required.

Does the C-21 hanger come with an integrated seal?

No, the C-21 is a non-automatic hanger and does not have an integrated seal. It must be used with a separate seal assembly, most commonly the H-Packoff, which is ordered to match the casing size.

What information is needed to order a C-21 and H-Packoff?

To ensure you receive the correct components, we need the nominal size of the wellhead housing (e.g., 11") and the size and weight of the casing string you will be running (e.g., 7", 23 lb/ft). Our engineering services team can assist you if you have any questions about specifications.

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