the pre-existence of Tianhe Petroleum Machinery Joint-Stock Co., Ltd

[Heilongjiang China (Mainland) ]

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Arrow Type Back Pressure Valve

Inside Bop

Casing Scraper

Surface Bumper Jar

Fishing Kumper Subs

Spiral Drill Collars

INTEGRAL SPIRAL BLADE STABILIZERS

Kelly Cock

Cementing Heads

Releasing and Circulating Overshot

Releasing Spear

Reverse Circulation Fishing Magnet

H Type Safety Joint

Drilling Jar

YSJ Type Hydraulic Up Jars

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