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magnetic drill 35mm
We supplyslick drill collars,spiral drill collarsandnon-magnetic drill collars; their sizes are from 3-1/8 to 11 inches. Besides the drill collars in the table below, we can supply other drill collars at customers\' request. Materials: Trepanning and Heat Treatment: ...
There are different kinds of drill collars,including round drill collar,spiral drill collar,non-magnetic drill collar,square drill collar and so on.Ordinary drill collar is the circular cross section, the center has a water hole,the wall thickness is larger,the nozzle is ...
1. Main Technical Parameters: 2. Product Description: Reverse circulation junk magnet in petroleum and geology exploration is used for fishing of small fallen objects in the downhole. With some of advantages such as simple structure easy to operate, reliable performance, small ...