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| Cementing with automatic one-way automatic valve successfully tested |
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| Published time:
2009-02-21
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3285
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In July 2007, the company develops and technology in cooperation with Saiwa company of Shandong, a year and a half through the development of research and pilot production, in lieu of cementing with one-way automatic valve of the United States successfully tested at the Bohai Oilfield.
Cementing with (PU material) rubber plug which use in the ocean is being tested.
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