Products
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Result
PATENTS
A subsurface safety valve-Patent No.: ZL201110336249.6 (Shared with CNOOC)
A subsurface safety valve-Patent No.: ZL201210229213.2
A flapper structure of subsurface safety valve-Patent No.: ZL201320534533.9
A sliding sleeve for separate layer production in oil and gas well - Patent No.: ZL201210228350.4
A sealing thread for couplings of downhole tools - Patent No.: ZL201120233367.X
A tool for fault handling of subsurface safety valve - Patent No.: ZL201120240220.3
A multi-level full bore drop ball sliding sleeve with a counting device-Patent No.: ZL201420267138.3
A multi-level full bore drop ball sliding sleeve with a counting device-Patent application No.: 201410220973.6
A multi-level full bore drop ball sliding sleeve with a counting device-Patent No.: ZL201420267256.4
A multi-level full bore drop ball sliding sleeve with a counting device-Patent application No.: 201410220978.9
A full bore drop ball sliding sleeve used for subsection fracturing-Patent No.: ZL201420267179.2
A full bore drop ball sliding sleeve used for subsection fracturing-Patent application No.: 201410221000.4
An annulus hydraulically controlled safety valve-Patent No.: ZL201520011101.9
An annulus hydraulically controlled safety valve-Patent application No.:201510008463.7
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