Mudanjiang Northmachine Co., Ltd

The Inside Bop is a heacy duty drop check valve with a conical plug to reduce the cutting action of the mud on the valve seat, ensuring positive closu

The Pin tap is a special fishing tool making thread on the inside wall of tube dropped objects such as drill pipe and oil tube, and the Box tap is a s

The Float Collars and Float Shoe are used to guide the casing to be put into the hole. It can adjust the floating power of the casing when the casing

Sleeve type Stabilizers are made of 4145H modified alloy steel. Heat treated to 285~341 BH and 54 Joules minimum impact value. The stabilizers consist

Tool joints of our company are made of modified alloy steel, then fully heat treated. So the mechanical properties in accordance with API standard, su