LOSS CIRCULATION MATERIALS FOR HIGH PRESSURE FORMATIONS

    公开(公告)号:US20230295484A1

    公开(公告)日:2023-09-21

    申请号:US17675747

    申请日:2022-02-18

    IPC分类号: C09K8/512 C09K23/00 C09K8/516

    摘要: Lost circulation material (LCM) compositions may include a resin; an emulsifier selected from the group consisting of ethoxylated phenol, sodium salt of modified tall oil fatty amide, carboxylic acid terminated fatty polyamide, modified amidoamine, tall oil fatty acid, oxidized tall oil fatty amidoamine, ether carboxylic acid, and combinations thereof; a crosslinker; a cementitious and/or weighting agent; a retarder; a dispersant; and a silicon-based defoamer. The LCM compositions may have a thickening time of from about 3 hours than about 6 hours by reaching a Bearden consistency of 100 Bc. Methods of eliminating or reducing lost circulation in a lost circulation zone from a well may include introducing these LCM compositions into the well.

    CARBON MATERIAL DISPERSION
    7.
    发明公开

    公开(公告)号:US20240191054A1

    公开(公告)日:2024-06-13

    申请号:US18551135

    申请日:2021-10-22

    IPC分类号: C08K3/04 C09K23/00

    CPC分类号: C08K3/04 C09K23/018

    摘要: There is provided a carbon material dispersion which has excellent dispersibility and in which the dispersibility is retained stably over a long period of time even when the carbon material dispersion contains a carbon material at a high concentration. The carbon material dispersion is a carbon material dispersion containing a carbon material, water, and a polymeric dispersant, wherein the polymeric dispersant is a polymer including 5 to 40% by mass of a constituent unit (1) derived from a monomer 1, such as 2-vinylpyridine, 50 to 80% by mass of a constituent unit (2) derived from a monomer 2 represented by formula (1) (wherein R1 represents a hydrogen atom or the like, A represents O or NH, X represents an ethylene group or a propylene group, Y represents O, NHCOO, or NHCONH, each of R2 represents a hydrogen atom or the like, n represents 20 to 100, and R3 represents a hydrogen atom or the like), and 0.5 to 40% by mass of a constituent unit (3) derived from a monomer 3 copolymerizable with above-described monomers.