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2014
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Invention
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Structure for gunpowder charge in multi-frac composite perforating device. This invention provide... |
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2013
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P/S
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Machines in the nature perforators and parts thereof used in oil and gas wells Oil and gas well s... |
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Invention
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Composite perforation method and device with propping agent. The present invention provides compo... |
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Invention
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Structure for gunpowder charge in combined fracturing perforation device. This invention provides... |
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2012
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Invention
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Structure for gunpowder charge in multi-frac composite perforating devices. This invention provid... |
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Invention
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Composite perforation device with scallops on the inner wall.
The present invention relates to a... |
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Invention
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A structure for gunpowder charge in multi-frac composite perforating devices. This invention prov... |
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Invention
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Composite perforating device with scallops on the inner wall. The present invention relates to a ... |
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2011
|
Invention
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Composite perforation method and device for carrying supporting agent. A composite perforation me... |
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|
Invention
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Structure for gunpowder charge in combined fracturing perforating devices. A structure for gunpow... |
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Invention
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Powder charging structure of composite fracturing perforation device. A powder charging structure... |
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2010
|
Invention
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Combined fracturing and perforating method and device for oil and gas well. A combined fracturing... |
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Invention
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Cable head for petroleum logging. A cable head for petroleum logging includes a first connector a... |
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Invention
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Cable head for petroleum logging. A cable head for petroleum logging includes a first connector (... |
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2005
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Invention
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High-energy gas fracture apparatus for through-tubing operations. Embodiments disclosed include a... |
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2004
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P/S
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Power tools, namely, mine borers, reamers, burrs; electric hand-held drills and parts therefor; o... |
