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Anti-jamming drilling device based on double-wall drilling rod and downhole power drilling tool
Free accessEuropean Patent Office | 2015| -
Rapid modular installation steel structure derrick and construction method thereof
Free accessEuropean Patent Office | 2023| -
Poly (sodium p-styrene sulfonate) modified Fe3O4 nanoparticles as effective additives in water-based drilling fluids
British Library Online Contents | 2018| -
Poly (sodium p-styrene sulfonate) modified Fe3O4 nanoparticles as effective additives in water-based drilling fluids
British Library Online Contents | 2018| -
A comparison of oxygen permeation and CO2 tolerance of La0.6Sr0.4Co0.2Fe0.6Nb0.2O3−δ and La0.6Sr0.4Fe0.8Nb0.2O3−δ ceramic membranes
British Library Online Contents | 2015| -
A new protocol for templated synthesis of YVO4:Ln luminescent crystallites (Ln=Eu, Dy, Sm)
British Library Online Contents | 2019| -
Device for effectively solving pump suffocation and drill burying in coreless drilling
Free accessEuropean Patent Office | 2021| -
Device for preventing engineering geophysical logging probe from blocking hole and using method thereof
Free accessEuropean Patent Office | 2023| -
Secondary lining trolley capable of adjusting pouring size
Free accessEuropean Patent Office | 2023| -
Roadbed steel corrugated pipe culvert jacking structure and jacking construction method
Free accessEuropean Patent Office | 2022| -
Permeable isolation device for frozen soil curtain after unfreezing
Free accessEuropean Patent Office | 2023|
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