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Henan Shenlong Petroleum Drilling Tools Co.,Ltd
nancyspring |
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www.sptechs.com |
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 drill collar
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تاريخ الإضافة
12/05/2008 05:18:00
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تفاصيل
Drill collars we produce is made from 4145H forging or rolling ,modified steel. We manage our production and inspection process strictly according to API SPEC7 requirements. All connections are phosphate-coated to improve resistance to corrision. We also do copper plating according to clientss requirements. We offer slip groove elevator according to clientss requirements. We probide free thread protector for both pin and box.
Different sizes we produce is form 3 1/2" to 11", our strength is large size like above 9" and small size like below 4 3/4".
تفاصيل
البيع و الشراء
30%TT and 70% L/C
FOB
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drill collar
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