Drill Collar
Product Introduction The drill collar is a thick-walled drilling tool that applies bit pressure, to enhance drilling.
Product Specification(a)Size (OD): 3-1/8" to 11".
(b)Type: Slick drill collar, spiral drill collar, non-magnetic drill collar.
(c)Drill collar specification: API Spec 7-1, API Spec 7-2, API RP 7G, NS-1, DS-1.
(d)Other proprietary products of Hilong that applicable to deep well and harsh environment drilling.
(e)Please refer to Table A.4 or Table B.4 for the specifications of commonly used API drill collars.
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