国家/地区 中国（5）
IPC部 C（5）
IPC大类 C09（5）
IPC小类 C09K（5） C04B（2）
IPC C09K008/467（5）
发明人
公开年 2022（5）
申请年 2020（3） 
专利权人 CHINA PETROL.（2）

Water-based drilling fluid system comprises bentonite, sodium hydroxide, fluid loss agent, nano plugging agent, well wall enhancer, inhibitor, coating agent, fine calcium, composite salt, barite and water.

WANG Y, QUAN X, GUO J, WANG K, ZHAO Y, ZHAO H, YU Y, SHI H, HE J, JIANG F

Plugging agent for oil-based drilling fluid comprises organic fiber material, inorganic fiber material, and high-elasticity modified asphalt particles.

XU Q, LIU S, LIU C, FU L

Long-term high temperature resistant, toughened cementing and sanding cement composite material useful in oil well cementing, comprises cement, alumina, ultrafine high-purity silica sand, additives, toughening materials, water, nano iron oxide and oil well cement admixture.

CHENG G, LI H, PANG X, QIN J

Microcapsule useful for temperature control and self-repair of cementing cement ring, comprises two layers of capsule walls wrapped outside capsule core, capsule core comprises temperature-controlled core material mixed with alkane and stearic acid.

CHENG R, HUANG H, QU Y, YANG J, SUN J, LIU T, WANG R

Crushing ground layer plug fixing wall agent useful in crushing stratum drilling, comprises cement, cementation strengthening agent, surface modified microcapsule curing agent, interface strengthening agent and water.

ZHANG F, WANG L, ZHANG D, ZHAO S, SONG B, WANG W, CHEN Z, LI F, LI D