Drill Collar

Classification :

Oil country tubular goods

Product: Drill Collar Standard:API SPEC 7-1 Steel grade:AISI 4145H Sizes:3 1/8" -- 11" Connected Type:NC, IF, REG

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Keywords:

Oil country tubular goods

PRODUCT DETAILS

API SPEC 7-1 drill collar is made with rolling or forging AISI4145H chromium molybdenum alloy steel. Therefore, it needs to control chemical composition and the content of trace elements effectively.

Specification

Standard	Number	OD (in.)	ID (in.)	Length (ft)	Weight (lb/ft)	Typical Bending Strength Ratio
SY5144-2007/API7-1	NC 23-31	3-1/8	1-1/4	30	22	2.57:1
	NC 26-35 (2-3/8 IF)	3-1/2	1-1/2	30	27	2.42:1
	NC 31-41 (2-7/8 IF)	4-1/8	2	30 or 31	34	2.43:1
	NC 35-47	4-3 /4	2	30 or 31	47	2.58:1
	NC 38-50 (3-1/2 IF)	5	2-1/4	30 or 31	54	2.38:1
	NC 44-60	6	2-1/4	30 or 31	83

PACKING AND DELIVERY

Packing and delivery

The company is a comprehensive steel production and supplier based in China and serving the world, providing domestic and foreign buyers with a full range of services including production, procurement, marketing, processing, logistics, and information.

FACTORY APPEARANCE

Strong manufacturing capabilities and complete industrial chain support. The factory covers an area of 20,000 square meters, with 8 advanced fully automatic cold bending production lines, 6 new hot rolling production lines, more than 20 feeders, 2 environmentally friendly hot-dip galvanizing production lines, and 2 oxygen-free annealing furnaces, maintaining an annual production capacity of 300,000 tons of steel.

APPLICATION AREAS

Widely used in automobile, petroleum, railway, bridge, construction, electric power, transportation, machinery, Marine light industry, home appliances, kitchen and other important fields. With excellent product quality, good reputation and innovative marketing concept,it ispopular at home and abroad.