|
CN105305409A
|
|
Pulse width modulation DC power supply system for corrosion prevention device of oil-water well sleeve
|
|
CN105086956A
|
|
Tackifier for oil-based drilling fluid and preparation method therefor
|
|
CN105038734A
|
|
Shear strength improving agent for oil-based drilling fluid and preparation method of shear strength improving agent
|
|
CN105064981A
|
|
Open hole whipstock for horizontal well section sidetrack drilling
|
|
CN105038731A
|
|
Modified disaccharide mud shale inhibitor for drilling fluid and preparation method thereof
|
|
CN104928685A
|
|
Oil-water well casing anticorrosion instrument
|
|
CN104946214A
|
|
Environment-friendly natural polymer drilling fluid
|
|
CN104967108A
|
|
DC power supply system of oil-water well bushing cathode protection anti-corrosion instrument
|
|
CN104962251A
|
|
Microemulsion filming sealing drilling fluid and preparation method
|
|
CN104911604A
|
|
Oil-field water injection pipeline inner wall anticorrosion device and replacement method
|
|
CN104946291A
|
|
Method for treating drill cuttings through supercritical CO2 extraction
|
|
CN104846379A
|
|
Preparation method of vegetable oil acid based imidazoline carbon dioxide corrosion inhibitor
|
|
CN105038741A
|
|
Cementing fluid system and preparation method of same
|
|
CN104863509A
|
|
Variable-diameter type back reaming machine
|
|
CN104863539A
|
|
Axial surrounding cooling structure of rotary blowout preventer
|
|
CN104863972A
|
|
Dynamic seal axial circulating cooling structure of rotary blowout preventer
|
|
CN104877649A
|
|
Modified starch fluid loss additive for drilling fluids and preparation method thereof
|
|
CN104747099A
|
|
Screw drill locking and unlocking device
|
|
CN104727760A
|
|
Spherical friction and resistance reduction stabilizer
|
|
CN104655413A
|
|
Testing device of sleeve external packer
|
