Associated copolymer and preparation method thereof, and drilling fluid

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9719005
APP PUB NO 20170114264A1
SERIAL NO

14970000

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

Disclosed are an associated copolymer, a method for preparation of a polymer and a polymer prepared with the method, a use of the associated copolymer and/or the polymer in drilling fluids, and a drilling fluid containing the associated copolymer and/or the polymer. The associated copolymer comprises acrylamide structural units, zwitter-ionic structural units, and cationic polyamine structural units at a specific proportion, and the cationic polyamine structural units have specific kinematic viscosity and cationic degree; thus, when the associated copolymer is used as a viscosity improver for drilling fluids, the obtained drilling fluid not only has favorable apparent viscosity after it is aged at a high temperature, but also has high dynamic shear force, and is resistant to high temperature up to 200° C. or above, resistant to NaCl up to saturated concentration, and resistant to CaCl2 up to 20 wt % concentration.

Loading the Abstract Image... loading....

First Claim

See full text

Family

Loading Family data... loading....

Patent Owner(s)

Patent OwnerAddress
CHINA PETROLEUM & CHEMICAL CORPORATIONNO 22 CHAOYANGMEN NORTH STREET CHAOYANG DISTRICT BEIJING 100728
FUSHUN RESEARCH INSTITUTE OF PETROLEUM AND PETROCHEMICALS SINOPEC CORPNO 31 DANDONG EAST ROAD WANGHUA DISTRICT FUSHUN LIAONING 113001

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Liu, Quanjie Liaoning, CN 7 5
Lu, Jiao Liaoning, CN 7 6
Sun, Xiaolei Liaoning, CN 7 40
Yang, Chao Liaoning, CN 249 849
Yin, Zequn Liaoning, CN 3 0
Zhang, Zhizhi Liaoning, CN 3 1

Cited Art Landscape

Load Citation

Patent Citation Ranking

Forward Cite Landscape

Load Citation

Maintenance Fees

Fee Large entity fee small entity fee micro entity fee due date
7.5 Year Payment $3600.00 $1800.00 $900.00 Feb 1, 2025
11.5 Year Payment $7400.00 $3700.00 $1850.00 Feb 1, 2029
Fee Large entity fee small entity fee micro entity fee
Surcharge - 7.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge - 11.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge after expiration - Late payment is unavoidable $700.00 $350.00 $175.00
Surcharge after expiration - Late payment is unintentional $1,640.00 $820.00 $410.00