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Drill collar

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◆Drill collars is one of the most important product of hexin oil drillings which mainly used to provide bit weight to drill so that drill pipe is in tension. Especially drill collar can keep drill bit centralized and hole track by large rigidity

Type	OD(mm)	ID(mm)	L(m)	DF(mm)
NC23-31	79.4	31.8	9.14	76.2
NC26-35	88.9	38.1	9.14	82.9
NC31-41	104.8	50.8	9.14/9.45	100.4
NC35-47	120.6	50.8	9.14/9.45	114.7
NC44-60	152.4	57.2	9.14/9.45	144.5
NC44-60	152.4	71.4	9.14/9.45	144.5
NC46-62	158.8	71.4	9.14/9.45	150
NC46-65	158.8	57.2	9.14/9.45	154.8
NC46-65	165.1	71.4	9.14/9.45	154.8
NC46-67	165.1	57.2	9.14/9.45	159.5
NC50-70	171.4	57.2	9.14/9.45	164.7
NC50-70	177.8	71.4	9.14/9.45	164.7
NC50-72	184.2	71.4	9.14/9.45	169.5
NC56-77	196.8	71.4	9.14/9.45	185.3
NC56-80	203.2	71.4	9.14/9.45	190.1
6-5/8REG	209.6	71.4	9.14/9.45	195.6
NC61-90	228.6	71.4	9.14/9.45	212.7
7-5/8REG	241.3	76.2	9.14/9.45	223.8
NC70-97	247.6	76.2	9.14/9.45	232.6
NC70-100	254	76.2	9.14/9.45	237.3
8-5/8REG	279.4	76.2	9.14/9.45	266.7