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balizhuangxili,beijing,beijing,China China
Contact Person Ms. Maria hou
Address balizhuangxili, beijing, beijing
Spiral drill collars are one kind of the products of our company. Spiral grooves make mud circulate freely around the drill collar to equalize pressur
Heavy weight drill pipes are manufactured from AISI 4145H modified drill collar material according to SPI SPEC7,heavy weight drill pipe was developed
Materials of the Non-magnetic drill collars are from chrome manganese. low carbon obtained by combining a proprietary chemical analysis and a rotary h
Heavy weight drill pipes are manufactured from AISI 4145H modified drill collar material according to SPI SPEC7, heavy weight drill pipe was developed
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