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公开(公告)号：US11225594B1
公开(公告)日：2022-01-18
申请号：US17201862
申请日：2021-03-15
发明人： Yang Bai , Pingya Luo , Hao Zhang , Cheng Li , Yan Cheng , Guojun Li , Chunyan Liu , Hongbo Li
摘要： The present invention relates to a drilling fluid for enhancing stratum pressure bearing capacity, and a method of preparing and using the drilling fluid. The drilling fluid comprises water, bentonite, low adhesive aggregation anionic cellulose, lignite resin, high temperature resistant and salt resistant filtrate reducer, silanol inhibitor, inorganic micrometer-nanometer rigid particles and emulsified asphalt. The bentonite is 2-9 parts by weight, the low adhesive aggregation anionic cellulose is 0.1-1 parts by weight, the lignite resin is 1-5 parts by weight, the high temperature resistant and salt resistant filtrate reducer is 0.1-2 parts by weight, the silanol inhibitor is 0.1-2 parts by weight, the inorganic micrometer-nanometer rigid particles are 0.5-5 parts by weight, and the emulsified asphalt is 1-10 parts by weight, based on 100 parts by weight of water.
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公开(公告)号：US11162010B2
公开(公告)日：2021-11-02
申请号：US16748144
申请日：2020-01-21
摘要： A nanometer plugging water-based drilling fluid and preparation method and use thereof are within this disclosure. The nanometer plugging water-based drilling fluid comprise a nanometer plugging agent. The nanometer plugging agent may be surface modified SiO2 powder with the surfactant. The surfactant may be sodium dodecyl benzene sulfonate and/or sodium dodecyl sulfate. The nanometer plugging water-based drilling fluid may perform effective anti-collapse of stratum and maintain the stability of stratum.
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公开(公告)号：US10829681B1
公开(公告)日：2020-11-10
申请号：US16742279
申请日：2020-01-14
摘要： The present disclosure discloses a modified nano-silica plugging agent, a water-based drilling fluid, and a preparation method and use thereof.
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公开(公告)号：US20210163807A1
公开(公告)日：2021-06-03
申请号：US16748144
申请日：2020-01-21
摘要： A nanometer plugging water-based drilling fluid and preparation method and use thereof are within this disclosure. The nanometer plugging water-based drilling fluid comprise a nanometer plugging agent. The nanometer plugging agent may be surface modified SiO2 powder with the surfactant. The surfactant may be sodium dodecyl benzene sulfonate and/or sodium dodecyl sulfate. The nanometer plugging water-based drilling fluid may perform effective anti-collapse of stratum and maintain the stability of stratum.
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公开(公告)号：US10989576B1
公开(公告)日：2021-04-27
申请号：US16844499
申请日：2020-04-09
发明人： Yang Bai , Yan Cheng , Pingya Luo , Hongbo Li , Cheng Li , Hao Zhang , Guojun Li , Dezhi Liu , Chunyan Liu
摘要： The invention discloses a method and system for obtaining an evaluation model and an evaluation method and system for the plugging performance of drilling fluid. The method for obtaining the evaluation model comprises: applying a confining pressure to a holding device where a preset fracture model is located, wherein a displacement differential pressure of two ends of the holding device is a preset displacement differential pressure; measuring a flow of standard measuring fluid flowing through the preset fracture model under different confining pressures, wherein the different confining pressures gradually increase according to a first preset rule; and controlling to stop increasing the confining pressure when the flow of the standard measuring fluid flowing through the preset fracture model reaches a preset flow so as to compress the preset fracture model into the evaluation model at a micro-nano level.
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6.发明授权公开(公告)号：US10829679B1
公开(公告)日：2020-11-10
申请号：US16743811
申请日：2020-01-15
摘要： A micro-nanometer plugging anti-collapse drilling fluid and fracturing method and use thereof.
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7.发明授权公开(公告)号：US10533122B1
公开(公告)日：2020-01-14
申请号：US16523228
申请日：2019-07-26
发明人： Yang Bai , Cheng Li , Guojun Li , Yan Cheng , Hao Zhang , Guancheng Jiang , Jinsheng Sun , Jingping Liu
摘要： The invention relates to the field of drilling fluid, and discloses a strong plugging drilling fluid composition and preparation method thereof, and use thereof. The strong plugging drilling fluid composition comprises water, bentonite, Na2CO3, a shale inhibitor, a filtrate reducer, a viscosity reducer, an anti-collapse agent, a nanometer plugging agent, a lubricant and a weighting agent. The shale inhibitor is modified asphalt, the anti-collapse agent is ultra-fine calcium carbonate, and the nanometer plugging agent is polyethylene glycol surface-modified nano-graphene.
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公开(公告)号：US10336932B1
公开(公告)日：2019-07-02
申请号：US16288721
申请日：2019-02-28
发明人： Yang Bai , Pingya Luo , Jinsheng Sun , Guancheng Jiang , Jiading Deng , Yan Cheng , Guojun Li
IPC分类号： C09K8/42
摘要： The present invention discloses a micro-nano composite plugging agent for drilling fluid, a preparation method of the micro-nano composite plugging agent for drilling fluid, a drilling fluid, and an application thereof. The composite plugging agent contains nanometer calcium carbonate, nanometer zinc oxide whiskers, nanometer emulsified paraffin, a flocculating agent, and a lubricant, wherein in the composite plugging agent, the nanometer calcium carbonate is in 10-36 parts by weight, the nanometer zinc oxide whiskers are in 20-40 parts by weight, the nanometer emulsified paraffin is in 30-70 parts by weight, the flocculating agent is in 1-10 parts by weight, and the lubricant is 5-20 parts by weight.
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