Encapsulating agent and preparing method thereof, and drilling fluid for petroleum drilling

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9845421
SERIAL NO

15368037

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

The present invention relates to the technical field of petroleum drilling, specifically provides an encapsulating agent and preparing method thereof, and a drilling fluid, wherein the encapsulating agent comprises an acrylamide monomer structure unit represented by formula (I), an anti-temperature monomer structure unit represented by formula (II) and an cation monomer structure unit represented by formula (III);

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

First Claim

See full text

Family

Loading Family data... loading....

Patent Owner(s)

Patent OwnerAddress
CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)66W CHANGJIANG RD HUANGDAO DIST QINGDAO 266580

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Huang, Wei'an Qingdao, CN 1 0
Qiu, Zhengsong Qingdao, CN 2 0
Zhang, Yongjun Qingdao, CN 63 377
Zhao, Xin Qingdao, CN 1071 7724
Zhong, Hanyi Qingdao, CN 1 0
Zhou, Guowe Qingdao, CN 1 0

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 Jun 19, 2025
11.5 Year Payment $7400.00 $3700.00 $1850.00 Jun 19, 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