公开(公告)号：US12264279B1

公开(公告)日：2025-04-01

申请号：US18914368

申请日：2024-10-14

Applicant: CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)

Inventor： Jian Li ,  Jinsheng Sun ,  Kaihe Lv ,  Jingping Liu ,  Meichun Li ,  Yingrui Bai ,  Xianbin Huang ,  Jintang Wang ,  Jiafeng Jin ,  Bo Liao

IPC: C09K8/12 ,  C08F283/12 ,  C10M107/50 ,  C10M173/02 ,  C10N20/00

Abstract: A high-temperature and high-salt resistant hyperbranched lubricant for a water-based drilling fluid, and preparation and application thereof are provided, belonging to the technical field of oilfield chemistry. The preparation method includes the steps of: mixing tetraethyl orthosilicate (TEOS), diethanolamine (DEA), and triethanolamine (TEA) for a transesterification and polycondensation reaction to obtain highly reactive hyperbranched polysiloxane; adding an acrylamide (AM) monomer, an anionic monomer, and a polar ester monomer into deionized water to obtain a monomer solution; adjusting the pH of the monomer solution to 5-9, and then adding highly reactive hyperbranched polysiloxane; introducing nitrogen to remove oxygen, adding an initiator, and thermally initiating a polymerization reaction; and after the reaction is completed, vacuum-drying and crushing an obtained product to obtain the high-temperature and high-salt resistant hyperbranched lubricant for a water-based drilling fluid.

公开(公告)号：US12110449B1

公开(公告)日：2024-10-08

申请号：US18391726

申请日：2023-12-21

Applicant: CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)

Inventor： Jintang Wang ,  Bo Liao ,  Xiaohui Sun ,  Jiaqi Xu ,  Yingrui Bai ,  Jian Li ,  Xianbin Huang ,  Jiafeng Jin ,  Meichun Li ,  Shenglong Shi ,  Kaihe Lv ,  Jingping Liu ,  Jinsheng Sun

IPC: C09K8/42

CPC classification number: C09K8/426

Abstract: Disclosed is a bio-enzyme degradable temporary plugging material and a preparation method and application thereof in the technical field of natural gas hydrate drilling and production; the preparation method of the bio-enzyme degradable temporary plugging material includes the following steps: mixing the ceramsite with an aqueous solution of 3-aminopropyl trimethoxysilane before a stirring reaction and drying to obtain modified ceramsite; and fully dispersing the modified ceramsite, ethyl cellulose, and epoxy resin in dichloromethane to obtain an oil phase; adding the oil phase into a gelatin aqueous solution and mixing uniformly; after a stirring reaction, evaporating an organic solvent, filtering, washing, and drying, to obtain the bio-enzyme degradable temporary plugging material.

公开(公告)号：US11578250B1

公开(公告)日：2023-02-14

申请号：US17749822

申请日：2022-05-20

Applicant: China University of Petroleum (East China)

Inventor： Jingping Liu ,  Jinsheng Sun ,  Kaihe Lv ,  Jintang Wang ,  Jiafeng Jin ,  Yingrui Bai ,  Xianbin Huang ,  Jian Li ,  Shenglong Shi

IPC: E21B43/26 ,  C09K8/467 ,  C09K109/00

Abstract: The present disclosure to a cementitious plugging wall solidifier for water-based drilling fluid and a preparation method thereof and a water-based drilling fluid.

公开(公告)号：US11970655B2

公开(公告)日：2024-04-30

申请号：US17966516

申请日：2022-10-14

Applicant: China University of Petroleum (East China)

Inventor： Jingping Liu ,  Jinsheng Sun ,  Kaihe Lv ,  Meichun Li ,  Jintang Wang ,  Jiafeng Jin ,  Yingrui Bai ,  Xianbin Huang ,  Jian Li ,  Shenglong Shi

IPC: C09K8/24 ,  C09K8/42 ,  E21B21/00

CPC classification number: C09K8/24 ,  C09K8/426 ,  E21B21/003 ,  C09K2208/10

Abstract: A high temperature and high salinity-resistant complementarily rigid-flexible plugging agent, a method for preparing the same, and a water-based drilling fluid and a use thereof.

公开(公告)号：US12043742B2

公开(公告)日：2024-07-23

申请号：US17822764

申请日：2022-08-26

Applicant: CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)

Inventor： Yingrui Bai ,  Jinsheng Sun ,  Kaihe Lv ,  Guancheng Jiang ,  Rongchao Cheng ,  Weian Huang ,  Jintang Wang ,  Jingping Liu ,  Xianbin Huang ,  Jiafeng Jin ,  Jian Li ,  Shenglong Shi

IPC: C08L93/04

CPC classification number: C08L93/04 ,  C08L2205/03

Abstract: An oil-soluble thermosensitive resin lost circulation material for protecting a reservoir includes the following raw materials in parts by weight: 40-60 parts of resin matrix, 15-40 parts of modified asphalt, 5-12 parts of viscosity modifier, 2-5 parts of cross-linking agent, 6-15 parts of softening point modifier, and 1-3 parts of dispersant; it further provides a method for preparing the resin lost circulation material; the resin lost circulation material can melt and adhere in different temperature ranges, rapid plugging is realized, and the plugging time is long; the oil-soluble thermosensitive resin lost circulation material can be dissolved by oil flow during oil well production, so that the reservoir permeability is recovered, so as to achieve the purpose of protecting the hydrocarbon reservoir.

公开(公告)号：US11187065B2

公开(公告)日：2021-11-30

申请号：US16472827

申请日：2019-01-15

Applicant: CHINA UNIVERSITY OF PETROLEUM

Inventor： Teng Lu ,  Zhaomin Li ,  Jian Li ,  Dingyong Zhang ,  Dawei Hou ,  Binfei Li

IPC: E21B43/16

Abstract: A composite nitrogen huff and puff method for a bounded fault block reservoir comprises: selecting the reservoir to be developed, wherein the reservoir to which the development method is applicable is roughly screened according to the following conditions: the reservoir is a bounded fault block reservoir, buried depth 0.5, reservoir thickness>10 m, horizontal permeability>100 mD, vertical permeability to horizontal permeability ratio>0.35, reservoir porosity>0.20, and stratigraphic dip>8°; and sequentially performing the following huff and puff phases: a nitrogen huff and puff phase, a nitrogen and water composite huff and puff phase, a nitrogen and foaming agent composite huff and puff phase, and a nitrogen and carbon dioxide composite huff and puff phase.