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    Method for modifying the water permeability of a subterranean formation
    1.
    发明授权
    Method for modifying the water permeability of a subterranean formation 有权

    公开(公告)号：US12098325B2

    公开(公告)日：2024-09-24

    申请号：US17422838

    申请日：2020-01-29

    申请人： SNF GROUP

    发明人： Cédrick Favero ,  Olivier Braun ,  Lionel Lauber

    IPC分类号： C09K8/588 ,  C08F220/56

    CPC分类号： C09K8/588 ,  C08F220/56

    摘要： The present invention relates to a method for modifying the water permeability of a subterranean formation which comprises oil, said method comprising at least the following steps:



    Preparing an injection fluid from a dispersion of a hydrophilic phase in a lipophilic phase, with water or brine, the dispersion comprising:

    a hydrophilic phase comprising at least one linear (co)polymer E,
    a lipophilic phase,
    at least one interface polymer composed of at least one monomer of formula (I):












    Injecting the injection fluid into the subterranean formation, comprising a linear (co)polymer E concentration, such that when released and in contact with water, the viscosity of the injection fluid is greater than the viscosity of the oil in the formation.

    Method for modifying the water permeability of a subterranean formation
    2.
    发明授权
    Method for modifying the water permeability of a subterranean formation 有权

    公开(公告)号：US11987744B2

    公开(公告)日：2024-05-21

    申请号：US18452258

    申请日：2023-08-18

    申请人： SNF Group

    发明人： Cédrick Favero ,  Olivier Braun ,  Lionel Lauber

    IPC分类号： C09K8/44 ,  E21B43/16

    CPC分类号： C09K8/44

    摘要： The invention relates to a method for modifying the water permeability of a subterranean formation, comprising at least the following steps:



    Preparing an injection fluid from a dispersion of a hydrophilic phase in a lipophilic phase, with water or brine, the dispersion comprising:

    a hydrophilic phase comprising at least one cross-linked (co)polymer PR,
    a lipophilic phase,
    at least one interface polymer composed of at least one monomer of formula (I):












    Injecting the injection fluid into the subterranean formation,


    said cross-linked (co)polymer PR forming a hydrogel in the presence of water.

    PROCESS FOR MANUFACTURING PAPER OR CARDBOARD
    3.
    发明公开
    PROCESS FOR MANUFACTURING PAPER OR CARDBOARD 审中-公开

    公开(公告)号：US20240044082A1

    公开(公告)日：2024-02-08

    申请号：US18258940

    申请日：2021-12-21

    申请人： SNF Group

    发明人： Cyril BARRIERE ,  Bastien MARTEL

    IPC分类号： D21H17/37 ,  D21H23/04 ,  D21H21/10 ,  C08F220/56 ,  D21J1/06

    CPC分类号： D21H17/375 ,  D21H23/04 ,  D21H21/10 ,  C08F220/56 ,  D21J1/06 ,  C08F2810/00

    摘要： A process for making a sheet of paper or cardboard from a fiber suspension, includes injection of a polymer P3 into a cellulosic fiber suspension, formation of a sheet of paper or cardboard, and drying of the sheet of paper or cardboard. The P3 polymer is prepared, prior to the injection, from a water-soluble P1 polymer of at least one nonionic monomer, such as acrylamide, methacrylamide, N,N-dimethylacrylamide, and acrylonitrile. The P1 polymer is subjected to a Re1 reaction to give a P2 polymer, which is then subjected to a Re2 reaction to give the P3 polymer, which is injected into the fibrous suspension within 24 hours of the start of the Re1 reaction.

    BIO-SOURCED CATIONIC HIGH CHARGE DENSITY POLYMER
    6.
    发明公开
    BIO-SOURCED CATIONIC HIGH CHARGE DENSITY POLYMER 审中-公开

    公开(公告)号：US20240279397A1

    公开(公告)日：2024-08-22

    申请号：US18565662

    申请日：2022-07-08

    申请人： SNF Group

    发明人： Cédrick FAVERO ,  Johann KIEFFER

    IPC分类号： C08G73/02 ,  C04B20/02 ,  C04B24/28

    CPC分类号： C08G73/022 ,  C04B20/023 ,  C04B24/28

    摘要： A bio-sourced cationic polymer is obtained by reaction of epihalohydrin that is least partially renewable and non-fossil, and at least one compound of formula (R1)2N(CH2CH2NH)n(CH2CH2N(R2)2)m that is at least partially renewable and non-fossil. R1 and R2 are, independently of one another, a hydrogen atom H or an alkyl chain including 1 to 8 carbon atoms, n=0 to 3, m=0 or 1. When n=m=0, then a hydrogen atom H is covalently bound to the nitrogen atom N of the N(R1)2 group.

    METHOD FOR MANUFACTURING PAPER AND CARDBOARD
    7.
    发明公开
    METHOD FOR MANUFACTURING PAPER AND CARDBOARD 审中-公开

    公开(公告)号：US20240263398A1

    公开(公告)日：2024-08-08

    申请号：US18691353

    申请日：2022-09-21

    申请人： SNF Group

    发明人： Cyril BARRIERE

    IPC分类号： D21H17/46 ,  D21H23/18

    CPC分类号： D21H17/46 ,  D21H23/18

    摘要： This invention relates to a process for making a paper or cardboard sheet from a fibrous suspension, comprising the following steps:



    a) injecting a P3 polymer into a suspension of cellulosic fibers,
    b) forming a paper or cardboard sheet,
    c) drying the paper or cardboard sheet,
    the P3 polymer being prepared, prior to step a), from a water-soluble P1 polymer of at least one nonionic monomer selected from acrylamide, methacrylamide, N,N-dimethylacrylamide and acrylonitrile,
    the P1 polymer being subjected to an Rel reaction to give a P2 polymer, which is then subjected to an Re2 reaction to give the P3 polymer, which is injected into the fibrous suspension within 24 hours of the start of the Re1 reaction,

    the Re1 reaction comprises preparing a P2 polymer comprising isocyanate functions by reaction for 10 seconds to 60 minutes between (i) an alkali hydroxide and/or an alkaline earth hydroxide, (ii) an alkali hypohalite and/or an alkaline earth hypohalite and (iii) the P1 polymer,
    the Re2 reaction comprises preparing a P3 polymer by reaction between (iv) a micro-cellulose compound and (v) the P2 polymer comprising isocyanate functions.