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Northern Oilfield Machinery

Professional manufacturer of petroleum drilling and extraction equipment and accessories

Patent Certificate

A hydraulically controllable casing head

A hydraulically controllable casing head

Self-guided flow-blocking assembly

Self-guided flow-blocking assembly

Impact-resistant rotary check valve

Impact-resistant rotary check valve

A plug valve for square drill pipes used in petroleum extraction construction

A plug valve for square drill pipes used in petroleum extraction construction

Oscillating Joint

Oscillating Joint

Plug valve for oil fields

Plug valve for oil fields

A type of drill string stabilizer

A type of drill string stabilizer

A type of drill string float valve

A type of drill string float valve

A type of check valve

A type of check valve

A check valve for oil fields

A check valve for oil fields

A type of oil pipe stabilizer

A type of oil pipe stabilizer

A high-sealing leak-proof casing head for oilfield wellheads

A high-sealing leak-proof casing head for oilfield wellheads

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