Product Details

API Spec Non magnetic Drill Collar

Drill Collar is mainly used for providing drill bit with required drilling pressure, ensuring pull force transmitted to drill pipe and centralize the drill bit. According to API Spec7-1 Specifications, the material quality is 4145H that’s after heat treatment, thread hardening treatment and phosphating to better antiseize. It also can be produced upon customers’ requirements.

Drilling Collar

According to API Spec7-1 Specifications
Drilling collar model	mm External Diameter	mm Internal Diameter	m Length	mm Chamfering Diameter	Reference Flexural Strength Rate
NC23-31	79.4	31.8	9140	76.2	2.57:1
NC26-35	88.9	38.1	9140	82.9	2.42:1
NC31-41	104.8	50.8	9140or9450	100.4	2.43:1
NC35-47	120.6	50.8	9140 or 9450	114.7	2.58:1
NC38-50	127.0	57.2	9140 or 9450	121.0	2.38:1
NC44-60	152.4	57.2	9140 or 9450	144.5	2.49:1
NC44-60	152.4	71.4	9140 or 9450	144.5	2.84:1
NC44-62	158.8	57.2	9140 or 9450	149.2	2.91:1
NC46-62	158.8	71.4	9140 or 9450	150.0	2.63:1
NC46-65	165.1	57.2	9140 or 9450	154.8	2.76:1
NC46-65	165.1	71.4	9140 or 9450	154.8	3.05:1
NC46-67	171.5	57.2	9140 or 9450	159.5	3.18:1
NC50-70	177.8	57.2	9140 or 9450	164.7	2.54:1
NC50-70	177.8	71.4	9140 or 9450	164.7	2.73:1
NC50-72	184.2	71.4	9140 or 9450	169.5	3.12:1
NC56-77	196.8	71.4	9140 or 9450	185.3	2.70:1
NC56-80	203.2	71.4	9140 or 9450	190.1	3.02:1
65/8REG	209.6	71.4	9140 or 9450	195.6	2.93:1
NC61-90	228.6	71.4	9140 or 9450	212.7	3.17:1
75/8REG	241.3	76.2	9140 or 9450	223.8	2.81:1
NC70-97	247.6	76.2	9140 or 9450	232.6	2.57:1
NC70-100	254.0	76.2	9140 or 9450	237.3	2.81:1
85/8REG	279.4	76.2	9140 or 9450	266.7	2.84:1

Established in 1975, Our factory is subordinated to Hebei Geology and Mineral

Industries Department. As the designated production enterprise, Our factory

specialized in manufacturing drilling equipment and auxiliary tools.

It is a member of China Mining Association, vice chairman of the Geological

and Mining Equipment Branch, a member of China Geological and

Equipment General Corporation, a member unit of National

Water Well Drilling Rig Information Network and a designated production enterprise

of the General Reserve Department of PLA.

Our factory has well equipped production equipment, strong technical strength,

perfect detection methods, reliable product quality and advanced management concept.

It has the domestic most advanced equipment, including the Numerical Controlled (NC)

friction welding machine, drill pipe hammer forging and all-in-one tempering equipment.

Besides, it is equipped with non-destructive testing (NDT), physical experiment,

chemical composition analysis and metallurgical analysis apparatus.Our factory get the ISO9001 in 2009 and API certification in 2002 one after another,

which becomes one of the API authorized enterprises in geological departments.

Production Equipment:

Excellent equipment and first class technology

Professionalism navgates science@techonlogy science&technology conceives speciality

Perfect in the process refining and improve by meticulosity