Tubular Specifications

API drill pipe, collars, casing & tubing

Size	OD (in)	ID (in)	Wt (lb/ft)	Grade	Connection	Cap (bbl/ft)	Disp (bbl/ft)	Closed (bbl/ft)
2-7/8"	2.875	2.441	6.65	E/X/G/S	NC26 (IF)	0.005788	0.002241	0.008029
2-7/8"	2.875	2.15	10.4	E/X/G/S	NC26 (IF)	0.004490	0.003539	0.008029
3-1/2"	3.5	2.764	9.5	E/X/G/S	NC31 (IF)	0.007421	0.004478	0.011900
3-1/2"	3.5	2.602	13.3	E/X/G/S	NC31 (IF)	0.006577	0.005323	0.011900
3-1/2"	3.5	2.15	15.5	E/X/G/S	NC31 (IF)	0.004490	0.007409	0.011900
4"	4	3.34	11.85	E/X/G/S	NC38 (IF)	0.010837	0.004706	0.015542
4-1/2"	4.5	3.826	13.75	E/X/G/S	NC40 (IF)	0.014220	0.005451	0.019671
4-1/2"	4.5	3.64	16.6	E/X/G/S	NC40 (IF)	0.012871	0.006800	0.019671
4-1/2"	4.5	3.34	20	E/X/G/S	NC40 (IF)	0.010837	0.008834	0.019671
5"	5	4.276	16.25	E/X/G/S	NC46 (IF)	0.017761	0.006524	0.024285
5"	5	4	19.5	E/X/G/S	NC46 (IF)	0.015542	0.008743	0.024285
5"	5	3.64	25.6	E/X/G/S	NC46 (IF)	0.012871	0.011414	0.024285
5-1/2"	5.5	4.778	19.2	E/X/G/S	NC50 (IF)	0.022176	0.007208	0.029385
5-1/2"	5.5	4.5	21.9	E/X/G/S	NC50 (IF)	0.019671	0.009714	0.029385
6-5/8"	6.625	5.969	25.2	E/X/G/S	NC56	0.034610	0.008025	0.042635

Cap = internal capacity · Disp = open-end metal displacement · Closed = closed-end displacement (metal + capacity). Factor: bbl/ft = d²(in) × 0.0009714