The present application provides an aqueous fluid containing a gas-generating compound such as an azo compound, a hydrazide compound, or a semicarbazide compound. The aqueous fluid may also contain an amine compound, an oxidizer, or viscosifier, and a foaming surfactant. The aqueous composition may be storable at pH of less than about 5 without any appreciable gas generation, and may be activated to produce gas when mixed with a wellbore fluid for use in downhole applications.
The present application provides a gas-generating aqueous fluid containing a gas-generating compound like an azo compound, and an organic amine like a primary, secondary or tertiary amine, a hydrazine, a hydrazide, or a semicarbazide. The aqueous fluid may also a viscosifier, and a foaming surfactant. The present application also provides a method of using the gas-generating composition to modulate density of a wellbore fluid for use in downhole applications. The method optionally includes adding an oxidizer to the wellbore fluid.
The present application provides a gas-generating aqueous fluid containing a gas-generating compound like an azo compound, and an organic amine like a primary, secondary or tertiary amine, a hydrazine, a hydrazide, or a semicarbazide. The aqueous fluid may also a viscosifler, and a foaming surfactant. The present application also provides a method of using the gas-generating composition to modulate density of a wellbore fluid for use in downhole applications. The method optionally includes adding an oxidizer to the wellbore fluid.
STORABLE GAS GENERATING COMPOSITIONS
申请人:Saudi Arabian Oil Company
公开号:US20200270505A1
公开(公告)日:2020-08-27
The present application provides an aqueous fluid containing a gas-generating compound such as an azo compound, a hydrazide compound, or a semicarbazide compound. The aqueous fluid may also contain an amine compound, an oxidizer, or viscosifier, and a foaming surfactant. The aqueous composition may be storable at pH of less than about 5 without any appreciable gas generation, and may be activated to produce gas when mixed with a wellbore fluid for use in downhole applications.
Design, synthesis and SAR of novel sulfonylurea derivatives for the treatment of Diabetes mellitus in rats
作者:Farid M. Sroor、Wahid M. Basyouni、Hanan F. Aly、Sanaa A. Ali、Azza F. Arafa
DOI:10.1007/s00044-021-02829-z
日期:2022.1
Novel series of sulfonylurea analogs were designed, synthesized and fully characterized. The targeted sulfonylurea analogs 3–11, were prepared in a straight forward manner by nucleophilic addition of aryl-sulfonyl hydrazine derivatives 1a–c to alkyl- or aryl-isocyanates 2a–c to give the corresponding sulfonylureas 3–11 in excellent yield. The prepared compounds have been elucidated by IR, elemental