Well cleanout using caustic alkyl polyglycoside compositions

Details Well cleanout using caustic alkyl polyglycoside compositions Well cleanout using caustic alkyl polyglycoside compositions

E - Fixed Constructions

21

B

E21B 37/00 (2006.01) C09K 8/52 (2006.01)

Patent

CA 2099012

Oil and gas wells and injection wells are cleaned of oil-based drilling muds, pipe thread compounds, other oil contaminants, cement and contaminants in injection water by a composition comprising fresh water or seawater, one-half to ten percent concentration of an alkyl polyglycoside surfactant and one to ten percent of a caustic agent such as sodium hydroxide, potassium hydroxide or ammonium hydroxide.

On procède au nettoyage de puits de pétrole et de gaz ainsi que de puits d'injection en éliminant les boues de forage à base de pétrole, les graisses pour filetages de canalisations, les autres contaminants du pétrole, le ciment et les contaminants se trouvant dans l'eau d'injection au moyen d'une composition comprenant de l'eau douce ou de l'eau salée, une concentration de 0,5 à 10 % d'un tensio-actif de polyglycosides d'alkyles et 1 à 10 % d'un agent caustique tel que l'hydroxyde de sodium, l'hydroxyde de potassium ou l'hydroxyde d'ammonium.

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