Casing Head Spools

Destination:

The casing spools used to suspend and to seal the casings.

The flanges and the passing inside diameters are designed according to API spec.6A.
On request, the side outlets of casing spools are provided with TBG or LP threads, or with threaded flanges.

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Casing head spools are provided with a seat for secondary sealing. The lower flange can be provided with a second smaller supplementary ring gasket allowing the maximum pressure build-off with one stage.

About Material class and Temperature classification, see Appendix A.

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Casing head spools

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Bottom flange	Top flange	Slips size	L	D1	D2	H1	H2	d min *
in x PSI	in x PSI	in	in	in	in	in	in	in
2,000 PSI WP
13 5/8 x 2,000	11 x 2,000	4 1/2 ÷ 7	17,7	22	20	2,94	2,81	9,92
3,000 PSI WP
13 5/8 x 3,000	11 x 3,000	4 1/2 ÷ 7	17,5	24	21,5	3,44	3,06	9,92
16 3/4 x 3,000			24,4	27,75	21,5	3,94	3,06	9,92
13 5/8 x 3,000	13 5/8 x 3,000	5 ÷ 10 3/4	17,7	24	24	3,44	3,44	12,39
16 3/4 x 3,000			17,7	27,75	24	3,94	3,44	12,39
5,000 PSI WP
11 x 3,000	11 x 5,000	4 1/2÷ 7	17,7	21,5	23	3,06	4,69	9,73
11 x 5,000			18,9	23	23	4,69	4,69	9,73
13 5/8 x 3,000			17,7	24	23	3,44	4,69	9,73
13 5/8 x 5,000			25,6	26,5	23	4,44	4,69	9,73
16 3/4 x 3,000			25,2	27,75	23	3,94	4,69	9,73
20 3/4 x 3,000	13 5/8 x 5,000	7 ÷ 10 3/4	26,6	33,75	26,5	4,75	4,44	9,73
10,000 PSI WP
11 x 10,000	9 x 10,000	4 1/2÷ 7	25,6	25,75	21,75	5,56	4,88	7,62
	11 x 10,000		27,6	25,75	25,75	5,56	5,56	8,41
13 5/8 x 5,000			26	26,5	25,75	4,44	5,56	8,41
13 5/8 x 10,000		4 1/2 ÷ 7 5/8	27,6	30,25	25,75	6,62	5,56	8,41
13 5/8 x 5,000	13 5/8 x 10,000	7 ÷ 10 3/4	26	26,5	30,25	4,44	6,62	10,66
16 3/4 x 5,000			27,2	30,38	30,25	5,13	6,62	10,66
18 3/4 x 5,000			33,5	35,62	30,25	6,53	6,62	10,66
18 3/4 x 10,000			37,4	40,94	30,25	8,78	6,62	10,66
15,000 PSI WP
11 x 10,000	9 x 15,000	4 1/2 ÷ 5 1/2	29,1	25,75	25,5	5,56	5,75	7,41
11 x 15,000	11 x 15,000	4 1/2 ÷ 7	35,4	32	32	7,38	7,38	8,41

* – available value for maximum dimension of casing