公开(公告)号：US11753575B2

公开(公告)日：2023-09-12

申请号：US17802545

申请日：2022-06-16

Applicant: Southwest Petroleum University

Inventor： Gang Xie ,  Ruolan Wang ,  Jinjun Huang ,  Yang Bai

IPC: C09K8/512 ,  C08F220/06 ,  C08F220/56 ,  C08K9/06 ,  C09K8/34

CPC classification number: C09K8/512 ,  C08F220/06 ,  C08F220/56 ,  C08K9/06 ,  C09K8/34 ,  C08F2800/20 ,  C08F2810/20 ,  C09K2208/10

Abstract: The invention discloses an organic-inorganic nanocomposite gel sealing agent and oil-based drilling fluid. The sealing agent used for the oil-based drilling fluid is organic-inorganic nanocomposite gel, and the synthetic raw materials of the organic-inorganic nanocomposite gel includes molybdenum disulfide, 2-ethyl acrylic acid, N, N-dimethylacrylamide and N,N-methylene bisacrylamide; the drilling fluid includes the organic-inorganic nanocomposite gel provided by the invention. The organic-inorganic nanocomposite gel is used as a nano sealing agent, the particle size distribution of the organic-inorganic nanocomposite gel is 50-200 nm, the organic-inorganic nanocomposite gel can effectively prevent drilling fluid filtrate from intruding into stratums and prevent accidents such as borehole wall collapse, the organic-inorganic nanocomposite gel is particularly suitable for nano-sealing of shale stratums, and the preparation method of the organic-inorganic nanocomposite gel is reliable in principle and has a wide market prospect.

公开(公告)号：US11692121B2

公开(公告)日：2023-07-04

申请号：US18053424

申请日：2022-11-08

Applicant: SOUTHWEST PETROLEUM UNIVERSITY

Inventor： Gang Xie ,  Ruolan Wang ,  Jinjun Huang ,  Yang Bai

IPC: C09K8/035 ,  C09K8/42 ,  C09K8/24 ,  B82Y30/00 ,  B82Y40/00

CPC classification number: C09K8/426 ,  C09K8/24 ,  B82Y30/00 ,  B82Y40/00 ,  C09K2208/10

Abstract: Disclosed are a high-temperature-resistant tertiary amine-grafted silica nano-plugging agent and water-based drilling fluids, relating to oil-gas field drilling. The nano-plugging agent is prepared from a hydrazine compound, a diallyl compound, an enamine compound, silica particle, and an amino-containing silane coupling agent by stepwise reaction. The nano-plugging agent has a grain size of 58-280 nm.