China drill collar, Chinese drill collar Manufacturers, Buyers & Suppliers

OD from 2 3/8'' to 6 5/8'' with hard banding and int...

There are three kinds of model of DCS Drill Collar Slips:S, R and L. The...

Drill Collars: Materials: Drill collars are manufactured from AISI ...

Drill collars Standardï¼�API 5D API SPEC 7 API RP 7G Size...

Drilling Collar (oil collar, drilling tool) 1.Different Size 2.Differe...

Drill Collars: Usage: One of the most important components of the d...

We&#039;re a Sino-German joint venture, completely equipped for manu...

This is Yang Zheng (Richard) from Jiangyin Rontech Manufacture Co., Ltd,...

We are professional of producer of drill pipe .We can produce E75 , G105...

1. Two kind of materials: Copper-beryllium (Cu-Be, which provides the be...

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China Drill collar