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2024
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Invention
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Top drive control system and method based on bi-directional transmission. A top drive control sys... |
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Invention
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Emulsifier and preparation method therefor, and oil-based drilling fluid. The present invention r... |
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Invention
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Composite emulsifier and oil-based drilling fluid. The present invention relates to the technical... |
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Invention
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Viscosity reducer and preparation method therefor and use thereof, and method for improving crude... |
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2023
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Invention
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Pack screen and bypass connector configured to connect to pack screen. Disclosed in the present i... |
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Invention
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Pdc-roller hybrid drill bit. The present invention belongs to the technical field of petroleum an... |
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Invention
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Positioning and orientating apparatus for branch well, and positioning and orientating method. A ... |
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2022
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Invention
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Coring tool, coring method, and application thereof.
A coring tool, a coring method, and use the... |
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Invention
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Sampling device and online surveying and mapping system. A sampling device and an online surveyin... |
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Invention
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Coring tool, coring method, and application thereof. A coring tool (1000), a coring method, and a... |
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Invention
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Method and apparatus for controlling angle-based rotation of top drive. Provided are a method and... |
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Invention
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Multi-adsorption site lubricating additive, manufacturing method therefor and application thereof... |
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Invention
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Mercaptobenzothiazolyl substituted compound, vegetable oil composition containing same, preparati... |
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2021
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Invention
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Multi-sector data correction method and system for gamma imaging while drilling.
A multi-sector ... |
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Invention
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Steerable drilling device. A steerable drilling device has an outer tube extending along a longit... |
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Invention
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Steerable drilling device. A steerable drilling device, comprising: an outer barrel (110) extendi... |
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Invention
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Multi-sector data correction method and system for gamma imaging while drilling. A multi-sector d... |
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Invention
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Coated rubber particle, its preparation and application thereof. Disclosed is a coated rubber par... |
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Invention
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Coated rubber particle, preparation method therefor and use thereof. A coated rubber particle, a ... |
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Invention
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Cyclic thioether compound, vegetable oil composition containing the same, their preparation and a... |
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Invention
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Cyclic sulfide compound, vegetable oil composition containing same, manufacturing method therefor... |
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2020
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Invention
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Flow splitting device for gas reverse circulation drilling. A flow splitting device for gas rever... |
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Invention
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Shunt device for reverse circulation gas-based drilling. A shunt device (100) for reverse circula... |
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Invention
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Expansion hanger. An expansion hanger and a tail pipe well completion method performed using the ... |
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Invention
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Double-channel fluid injection apparatus. A double-channel fluid injection apparatus includes a m... |
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Invention
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Temperature-controlled automated online drilling fluid rheology measurement apparatus. A temperat... |
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Invention
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Double-flow-channel fluid injection apparatus. A double-flow-channel fluid injection apparatus, c... |
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2014
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Invention
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Comb polymer, method of preparing the same, and use thereof. The present disclosure discloses a c... |
