Casing Head

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Intermediate casing spool	G-Y type intermediate casing head

The casing head is classified into two types, including the bottom drive head and the middle drive head spool. It is a key component connecting the casing pipe and various wellhead devices.

Main Functions
1. It supports the partial or entire weights of all casing pipes except for the conduit via the hanger.
2. It connects the blowout preventer and other wellhead devices.
3. Pressure sealing is formed between the internal and external casing strings.
4. It provides exit for the pressure accumulated between the two layers casing pipes.
5. In case of emergency, the fluid as kill or extinguishing fluid can be pumped into the well via the side hole of casing head.
6. The casing head has excellent performance for special operations.
a. If the well cementation quality is inferior, supplementary cementing can be performed via the side hole.
b. For acid-fracturing operation, the pressure equilibrium liquid can be injected via the side hole.
7. This product also acts as a transition piece for the middle casing spool, tubing head, Christmas tree or other upper wellhead devices. The middle casing spool has the same features and functions as that of the lower casing head. Their difference lies in that the lower casing head assembly is built for suspending the surface casing and the middle casing spool assembly is used for hanging the intermediate casing.

In addition, the casing head and the hanger are provided in wide varieties. They also can be custom-made according to your actual needs, such as C-22, C-29, etc.

S type bottom casing head

G type bottom casing head

Parameters

Size A (inch)	Size C (inch)	2000PSI		3000PSI		5000PSI
Top Flg.	Thd.or Weld	H	B	H	B	H	B
9	7 5/8	440	182	440	182	450	182
9	7	440	168	440	168	450	168
11	10 3/4	450	248	450	248	470	248
	9 5/8	450	234	450	234	470	234
	8 5/8	450	208	450	208	470	208
13 5/8	13 3/8	475	316	475	316	485	316
13 5/8	12 3/4	475	298	475	298	485	298
16 3/4	16	485	385	485	385	485	385
18 3/4	18					500	440
20 3/4	20			520	482
21 1/4	20	520	482	520	482


Intermediate casing spool	S-Y type intermediate casing head

Parameters

Size A (inch)	Size D (inch)	Size (inch)
Top Flg.	Bottom Flg.	H	Max. B	Max. C
9-3000	11-2000	580	208	8 5/8
9-3000	11-3000	580	208	8 5/8
9-5000	11-3000	600	208	8 5/8
	11-5000	600	208	8 5/8
	13 5/8-3000	620	248	10 3/4
	13 5/8-5000	630	248	10 3/4
11-2000	13 5/8-2000	620	248	10 3/4
11-2000	16 3/4-2000	640	316	13 3/8
11-3000	13 5/8-3000	625	248	10 3/4
11-3000	16 3/4-3000	640	316	13 3/8
11-5000	13 5/8-3000	630	248	10 3/4
	13 5/8-5000	640	248	10 3/4
	16 3/4-3000	650	316	13 3/8
	16 3/4-5000	670	316	13 3/8
11-10000	13 5/8-5000	700	248	10 3/4
11-10000	16 3/4-5000	700	316	13 3/8
13 5/8-2000	13 5/8-2000	650	248	10 3/4
13 5/8-2000	16 3/4-5000	670	316	13 3/8
13 5/8-3000	13 5/8-3000	650	248	10 3/4
	16 3/4-3000	670	316	13 3/8
	20 3/4-3000	680	385	16
	21 1/4-2000	680	385	16
13 5/8-5000	16 3/4-3000	680	316	13 3/8
	16 3/4-5000	680	316	16
	20 3/4-3000	680	385	16
	21 1/4-2000	680	385	13 3/8
13 5/8-10000	16 3/4-5000	700	316	13 3/8
	20 3/4-3000	700	385	16
	21 1/4-2000	700	385	16
16 3/4-3000	20 3/4-3000	700	385	16
16 3/4-3000	21 1/4-2000	700	385	16
16 3/4-5000	20 3/4-3000	700	385	16
16 3/4-5000	21 1/4-2000	700	385	16

Related Names
Oil Well Casing Spool | Casing Head Housing | Oil Drilling Assembly

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