DEVELOPMENT HISTORY

2019

As of 2019, the company has obtained 31 technical patents for diamond drill bits, including five invention patents.

2006

In 2006, China Petroleum & Chemical Corporation (Sinopec Group) cleared its long-term investments in its subsidiaries. The company was fully privatized and renamed Wuhan Eastar Tool Company Limited.

2003

In 2003, Wuhan Jiangzuan Diamond Drill Bit Co., Ltd. was established, with Jianghan Petroleum Drill Bit Co., Ltd. holding a stake.

1995

In 1995, introduced the anti-spiral diamond drill bit technology from Amoco Corporation of the United States.

1990

In 1990, the design and manufacturing technology for diamond core bits was introduced from Hughes Christensen Company of the United States.

1987

In 1987, the Jianghan Drill Bit Factory Diamond Drill Bit Branch was established, introducing diamond drill bit design and manufacturing technology from Hughes Company of the United States.

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