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1.发明公开公开(公告)号：US20240309260A1
公开(公告)日：2024-09-19
申请号：US18677235
申请日：2024-05-29
IPC分类号： C09K8/035
CPC分类号： C09K8/035
摘要： A drilling fluid composition comprising a base fluid, and a viscosifier including an ultra-high molecular weight branched block copolymer having the following structure,
where monomer A is an anionic monomer, monomer B is a hydrophilic monomer, monomer C is an anionic monomer, monomer D is a crosslinker-divinyl monomer, and-SSCZ ground being a terminal RAFT agent.-
2.发明公开公开(公告)号：US20240084186A1
公开(公告)日：2024-03-14
申请号：US18497439
申请日：2023-10-30
摘要： A drilling fluid composition comprising a base fluid, and a shale inhibitor including an ultra-high molecular weight branched block copolymer having the following structure,
where monomer A is an anionic monomer, monomer B is a hydrophilic monomer, monomer C is an anionic monomer, monomer D is a crosslinker-divinyl monomer, and -SSCZ ground being a terminal RAFT agent.-
公开(公告)号：US11891565B1
公开(公告)日：2024-02-06
申请号：US17819419
申请日：2022-08-12
CPC分类号： C09K8/44 , C09K8/035 , C09K8/426 , C09K8/487 , E21B21/003
摘要： In accordance with one or more embodiments of the present disclosure, a host-guest lost circulation material (LCM) composition for sealing lost circulation zones in wellbores includes an aqueous solution; one or more linear polymer chains, the linear polymer chains comprising polyethylene glycols (PEG) with molecular weights greater than 2500 g/mol, polypropylene glycols (PPG), polydimethylsiloxanes (PDMS), or combinations thereof; and one or more cyclic molecules comprising alpha cyclodextrin, beta cyclodextrin, gamma cyclodextrin, or combinations thereof, and wherein the one or more cyclic molecules form a host-guest structure around the one or more linear polymer chains utilizing van der Waals forces.
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公开(公告)号：US20230358132A1
公开(公告)日：2023-11-09
申请号：US18351042
申请日：2023-07-12
发明人： Peter J. Boul , Ashok Santra
IPC分类号： E21B47/005 , E21B47/13 , C09K8/03 , C09K8/34 , C09K8/40 , C09K8/42 , C09K8/467 , E21B33/14 , G01V3/20
CPC分类号： E21B47/005 , E21B47/13 , C09K8/032 , C09K8/34 , C09K8/40 , C09K8/424 , C09K8/467 , E21B33/14 , G01V3/20 , C09K2208/08 , C09K2208/10
摘要： Methods of determining the integrity of a well are provided. The methods include mixing conductive materials into a fluid, introducing the fluid into the well, and allowing the conductive materials to coat a surface of a subsurface formation, thereby forming an electrically conductive data conduit coating. The methods further include transmitting data through the electrically conductive data conduit coating to determine the integrity of the well.
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公开(公告)号：US20230272262A1
公开(公告)日：2023-08-31
申请号：US18312658
申请日：2023-05-05
发明人： Simone Musso , Ashok Santra
IPC分类号： C09K8/467 , E21B47/005 , C04B14/02 , C04B14/38 , C04B14/48 , C04B22/04 , C04B22/06 , C04B28/02 , E21B33/14 , E21B36/04
CPC分类号： C09K8/467 , E21B47/005 , C04B14/026 , C04B14/386 , C04B14/48 , C04B22/04 , C04B22/06 , C04B22/064 , C04B28/02 , E21B33/14 , E21B36/04 , C04B2111/94
摘要： A method of sealing propagating cracks in a sensor-laden cement sheath comprising the steps of monitoring an electrical resistivity of the sensor-laden cement sheath to produce a measured value, wherein the sensor-laden cement sheath comprises a conductive sensor, an on-demand expanding agent, and a cement, activating a heat source when the measured value of the electrical resistivity is greater than an activation threshold, increasing a temperature of the sensor-laden cement sheath with the heat source to an activation temperature, wherein the activation temperature is operable to initiate a reaction between the on-demand expanding agent and water, wherein the activation temperature is greater than a formation temperature, reacting the on-demand expanding agent with water to produce a swelled agent, wherein the swelled agent occupies a greater volume than the on-demand expanding agent, and sealing the propagating cracks in the sensor-laden cement sheath with the swelled agent.
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公开(公告)号：US20210079287A1
公开(公告)日：2021-03-18
申请号：US16570783
申请日：2019-09-13
发明人： Simone Musso , Ashok Santra
IPC分类号： C09K8/467 , C04B28/02 , C04B14/38 , C04B14/48 , C04B14/02 , C04B22/06 , C04B22/04 , E21B33/14 , E21B47/00 , E21B36/04
摘要： A method of sealing propagating cracks in a sensor-laden cement sheath comprising the steps of monitoring an electrical resistivity of the sensor-laden cement sheath to produce a measured value, wherein the sensor-laden cement sheath comprises a conductive sensor, an on-demand expanding agent, and a cement, activating a heat source when the measured value of the electrical resistivity is greater than an activation threshold, increasing a temperature of the sensor-laden cement sheath with the heat source to an activation temperature, wherein the activation temperature is operable to initiate a reaction between the on-demand expanding agent and water, wherein the activation temperature is greater than a formation temperature, reacting the on-demand expanding agent with water to produce a swelled agent, wherein the swelled agent occupies a greater volume than the on-demand expanding agent, and sealing the propagating cracks in the sensor-laden cement sheath with the swelled agent.
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公开(公告)号：US20210025272A1
公开(公告)日：2021-01-28
申请号：US16934602
申请日：2020-07-21
发明人： Peter J. Boul , Ashok Santra
IPC分类号： E21B47/005 , C09K8/03 , C09K8/34 , C09K8/40 , C09K8/467 , C09K8/42 , E21B33/14 , E21B47/13 , G01V3/20
摘要： Methods of determining the integrity of a well are provided. The methods include mixing conductive materials into a fluid, introducing the fluid into the well, and allowing the conductive materials to coat a surface of a subsurface formation, thereby forming an electrically conductive data conduit coating. The methods further include transmitting data through the electrically conductive data conduit coating to determine the integrity of the well.
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公开(公告)号：US20200332169A1
公开(公告)日：2020-10-22
申请号：US16832279
申请日：2020-03-27
发明人： Ashok Santra , Peter J. Boul
摘要： The present disclosure relates to methods of suspending at least one weighting agent in drilling fluids. The embodiments include adding a quantity of precursor nanoparticles including carbon nanotubes supported by metal oxide catalyst nanoparticles to the drilling fluid. The metal oxide catalyst nanoparticles and the drilling fluid are selected such that the metal oxide catalyst nanoparticles are dissolvable in the drilling fluid. The metal oxide catalyst nanoparticles dissolve in the drilling fluid, resulting in an amount of carbon nanotubes dispersed within the drilling fluid. The carbon nanotube dispersion increases the value of at least one of a Newtonian viscosity, a yield point, a plastic viscosity, and a density of the drilling fluid with the dispersed carbon nanotubes versus a similar or equivalent hydraulic fracturing fluid without the carbon nanotube dispersion. The method may further include adding at least one weighting agent which will become suspended in the drilling fluid.
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公开(公告)号：US11898084B2
公开(公告)日：2024-02-13
申请号：US17410119
申请日：2021-08-24
发明人： Hasmukh Patel , Ashok Santra , Carl Thaemlitz
摘要： Methods and compositions for modified well fluids. One method including combining an amount of a synthetic functionalized additive with an intermediate well fluid composition to form a synthetic functionalized additive-containing well fluid composition; the synthetic functionalized additive comprising a synthetic layered magnesium silicate that is covalently bonded to a functional group, and the intermediate well fluid composition comprising a water-based continuous phase with solid particles, wherein the synthetic functionalized additive increases suspension stability of the solid particles versus a well fluid composition comprising the solid particles without the synthetic functionalized additive.
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公开(公告)号：US20230375523A1
公开(公告)日：2023-11-23
申请号：US17664169
申请日：2022-05-19
发明人： Arpita Pal Bathija , Ashok Santra
IPC分类号： G01N33/28
CPC分类号： G01N33/2823 , E21B21/003
摘要： A lost circulation material is placed in a cavity. The cavity is defined by an inner bore of a cylindrical wall, intermediate of a piston and a screen. A distance between the piston and the screen is defined as the height of the cavity, which is adjustable. The piston is slid longitudinally, such that the piston comes in contact with the lost circulation material. The lost circulation material is heated to a specified test temperature mimicking a downhole temperature. A compression test is performed on the lost circulation material. The compression test includes flowing a test fluid into the cavity and applying force on the piston to pressurize the test fluid to a specified test pressure mimicking a downhole pressure. The force on the piston is released. The pressure of the test fluid and the height of the cavity are measured throughout the compression test.
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