?1, Bits pictures :? ? 2?,Iterm details :? 1) Name : ?? assembly drilling bits ? 2)Application :?? apply to??the large size oil well, water well drilling ?and?The tunnel, the rive?Horizontal ?drilling hole?infrastructure applications 3) Size and IADC CODE

Bit?size?		????????????????????????????????????Bit??IADC?CODE?
In.	mm
?	5000	117,?127,?517,?537,?617,?637?(?Factory?recommend?517?)
?	4000	117,?127,?517,?537,?617,?637??(?Factory?recommend?517?)
?	3000	117,?127,?517,?537,?617,?637?(?Factory?recommend?517?)
?	2000	117,?127,?517,?537,?617,?637?(?Factory?recommend?517?)
?	1500	117,?127,?517,?537,?617,?637?(?Factory?recommend?517?)
?	1000	117,?127,?517,?537,?617,?637?(?Factory?recommend?517?)
38	914.4	117,?127,?517,?537,?617,?637?(?Factory?recommend?517?)
32	812.8	117,?127,?517,?537,?617,?637?(?Factory?recommend?517?)
28	711.2	117,?127,?517,?537,?617,?637?(?Factory?recommend?517?)?

4,Payment Term: T/T or L/C western union , 30% advanced payment after sign the PI contract and 70% balance before shipping the goods . 5,Shipping information : 1) 1-30KG by international express (EMS ,DHL and so on )? 2) heavey than 45KG by air (by plane ) 3)last can by shipping ,by sea more cheaper but need more time .? ? ? ?