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公开(公告)号：US11884871B2
公开(公告)日：2024-01-30
申请号：US16874575
申请日：2020-05-14
发明人： Dimitri M. Khramov , Yiyan Chen , Stephen Cliffe , Reda Karoum
IPC分类号： C09K8/34
CPC分类号： C09K8/34
摘要： Wellbore fluid compositions may include an oleaginous base fluid; and a polymeric rheology modifier incorporating a polar comonomer at a percent by weight (wt %) in the range of 1 wt % to 20 wt %; wherein the low shear rate viscosity (LSRV) of the wellbore fluid measured by FANN 35 rheometer at 3 rpm and 150° F. is in the range of 8 to 12. Methods may include emplacing a wellbore fluid in a wellbore, wherein the wellbore fluid comprises an oleaginous base fluid and a polymeric rheology modifier incorporating a polar comonomer at a percent by weight (wt %) in the range of 1 wt % to 50 wt %; wherein the low shear rate viscosity (LSRV) of the wellbore fluid is in the range of 8 to 12.
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公开(公告)号：US11827838B2
公开(公告)日：2023-11-28
申请号：US17595244
申请日：2020-05-15
发明人： Dimitri M. Khramov , Stephen Cliffe , Reda Karoum
摘要： Wellbore fluids may include an oleaginous continuous phase; a non-oleaginous discontinuous phase; and a polymeric amidoamine emulsifier stabilizing the non-oleaginous discontinuous phase in the oleaginous continuous phase, wherein the polymeric amidoamine emulsifier has at least 5 repeating units. Wellbore fluids may include an oleaginous continuous phase; a non-oleaginous discontinuous phase; and a polymeric amidoamine emulsifier stabilizing the non-oleaginous discontinuous phase in the oleaginous continuous phase, wherein the polymeric amidoamine emulsifier includes at least 3 repeating units selected from allylamine, polyaminopolyamide, N-alkyl acrylamides, (meth)acrylic acid, alkyleneamine reacted with a dicarboxylic acid, alpha-olefin-alt-maleic anhydride, styrene maleic anhydride, alkylene oxide, wherein one or more amine or acid group on the repeating unit is amidized.
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公开(公告)号：US20240059949A1
公开(公告)日：2024-02-22
申请号：US18491901
申请日：2023-10-23
发明人： Dimitri M. Khramov , Stephen Cliffe , Reda Karoum
摘要： Wellbore fluids may include an oleaginous continuous phase; a non-oleaginous discontinuous phase; and a polymeric amidoamine emulsifier stabilizing the non-oleaginous discontinuous phase in the oleaginous continuous phase, wherein the polymeric amidoamine emulsifier has at least 5 repeating units. Wellbore fluids may include an oleaginous continuous phase; a non-oleaginous discontinuous phase; and a polymeric amidoamine emulsifier stabilizing the non-oleaginous discontinuous phase in the oleaginous continuous phase, wherein the polymeric amidoamine emulsifier includes at least 3 repeating units selected from allylamine, polyaminopolyamide, N-alkyl acrylamides, (meth)acrylic acid, alkyleneamine reacted with a dicarboxylic acid, alpha-olefin-alt-maleic anhydride, styrene maleic anhydride, alkylene oxide, wherein one or more amine or acid group on the repeating unit is amidized.
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公开(公告)号：US11814570B2
公开(公告)日：2023-11-14
申请号：US17820684
申请日：2022-08-18
IPC分类号： C09K8/36 , C07D207/12 , C07D307/22
CPC分类号： C09K8/36 , C07D207/12 , C07D307/22
摘要： Drilling fluid compositions include an emulsifier having a generic structure A, structure B, or a combination thereof. Structure A includes an amide (e.g., amic acid group) and structure B includes a cyclic imide. The emulsifier of the emulsifier system is formed by reacting a fatty oil amine (e.g., oleyl amine), with a cyclic anhydride (e.g., succinic anhydride) in the absence of diluent or in a diluent that does not react with the starting materials. The reaction takes place via application of a stepwise increase in temperature. An emulsifier based on structure A is formed when the reaction temperature is maintained at 50 to 100° C. for 1 to 3 hours. A further increase in reaction temperature (e.g., up to 200° C.) can include water elimination which results predominately in the formation of a molecule represented by structure B.
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公开(公告)号：US11555138B2
公开(公告)日：2023-01-17
申请号：US15905053
申请日：2018-02-26
摘要： A method of drilling a wellbore includes pumping an oleaginous wellbore fluid into a wellbore, the oleaginous wellbore fluid including an oleaginous continuous phase; a non-oleaginous discontinuous phase; an emulsifier stabilizing the non-oleaginous discontinuous phase in the oleaginous continuous phase; an organophilic clay; a weighting agent; and a wetting agent having an HLB ranging from about 4 to 10.5 that it selected such that the oleaginous wellbore fluid has a 600 rpm dial value at 40° F. of less than about 300 and a 10 minute gel strength of less than about 40 lbf/100 ft2.
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公开(公告)号：US20220220356A1
公开(公告)日：2022-07-14
申请号：US17595244
申请日：2020-05-15
发明人： Dimitri M. Khramov , Stephen Cliffe , Reda Karoum
摘要： Wellbore fluids may include an oleaginous continuous phase; a non-oleaginous discontinuous phase; and a polymeric amidoamine emulsifier stabilizing the non-oleaginous discontinuous phase in the oleaginous continuous phase, wherein the polymeric amidoamine emulsifier has at least 5 repeating units. Wellbore fluids may include an oleaginous continuous phase; a non-oleaginous discontinuous phase; and a polymeric amidoamine emulsifier stabilizing the non-oleaginous discontinuous phase in the oleaginous continuous phase, wherein the polymeric amidoamine emulsifier includes at least 3 repeating units selected from allylamine, polyaminopolyamide, N-alkyl acrylamides, (meth)acrylic acid, alkyleneamine reacted with a dicarboxylic acid, alpha-olefin-alt-maleic anhydride, styrene maleic anhydride, alkylene oxide, wherein one or more amine or acid group on the repeating unit is amidized.
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7.发明公开公开(公告)号：US20240229606A1
公开(公告)日：2024-07-11
申请号：US18693602
申请日：2022-09-29
CPC分类号： E21B37/06 , C09K8/08 , C09K2208/12
摘要： Shale inhibitor additives, wellbore fluids comprising said additives, and methods using said fluids control hydration in wellbores disposed within swellable subterranean formations. The wellbore fluids contain aqueous base fluids. the shale inhibition additives. and natural biopolymeric viscosifiers. and optional encapsulating polymer agents. wherein the shale inhibition additives include amine-based shale inhibition agents. The methods circulate the wellbore fluids into the wellbores and/or maintain triamine-based shale inhibition agents of the wellbore fluids at concentrations of at least 50% by weight. based on total weights of the shale inhibition additives during multiple circulations of the wellbore fluids in the wellbores.
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公开(公告)号：US20230072831A1
公开(公告)日：2023-03-09
申请号：US17820684
申请日：2022-08-18
IPC分类号： C09K8/36 , C07D307/22 , C07D207/12
摘要： Drilling fluid compositions include an emulsifier having a generic structure A, structure B, or a combination thereof. Structure A includes an amide (e.g., amic acid group) and structure B includes a cyclic imide. The emulsifier of the emulsifier system is formed by reacting a fatty oil amine (e.g., oleyl amine), with a cyclic anhydride (e.g., succinic anhydride) in the absence of diluent or in a diluent that does not react with the starting materials. The reaction takes place via application of a stepwise increase in temperature. An emulsifier based on structure A is formed when the reaction temperature is maintained at 50 to 100° C. for 1 to 3 hours. A further increase in reaction temperature (e.g., up to 200° C.) can include water elimination which results predominately in the formation of a molecule represented by structure B.
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公开(公告)号：US20230011243A1
公开(公告)日：2023-01-12
申请号：US17811251
申请日：2022-07-07
摘要： Drilling fluid mixtures are described herein that are stable oil-in-water emulsions. Also described herein are surfactant packages for stabilizing such emulsions. The surfactant packages use an alkyl ether anion comprising an alkyl portion, an anionic head group, and an ether portion between the alkyl portion and the anionic head group.
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公开(公告)号：US20230374365A1
公开(公告)日：2023-11-23
申请号：US18028283
申请日：2021-01-29
IPC分类号： C09K8/36
CPC分类号： C09K8/36
摘要： Improved emulsifier for synthetic-based mud, process for preparation, and drilling method. The emulsifier has the formula (II) wherein each R1 is a C4 to C30 alkyl; R2, R3, R5, and R6 are each independently selected from H, C1 to C4 alkyl, C1 to C4 alkoxyalkyl, and C1 to C4 hydroxyalkyl; n and m are independently integers from 1 to 10; and y is an integer from 1 to 5. It is prepared by reacting a polyalkyleneamine with a monocarboxylic acid to form a first reaction product, reacting the first reaction product with a dicarboxylic acid to form a second reaction product, and heat treating the second reaction product to form an isomer. The drilling fluid contains the emulsifier, an oleaginous phase, and a non-oleaginous phase, and during use is circulated in a wellbore.
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