Study On Quality Control, High Temperature Crosslinking And Foaming Mechanism Of Sulfomethylated Phenolic Resin

For the current major problems in Sulfonated drilling fluid agents, this essay combinesrelevant content of Tarim Oilfield projects : "High temperature high pressure drilling fluidrheological study" and "Drilling fluid sulfonating treatment agent foaming factors andevaluation study", based on the studyof the molecular structure ofsulfo- methylated phenolicresin,analysed crosslinkingmechanism ofsulfomethylatedphenolic resin at hightemperatureandbubblingmechanismofamoredetailedandsuccessfullyidentifiedmethodtoenhancethestabilityofsulfomethylatedphenolicresinathightemperatureandtoinhibititsfoaming.In this paper, analysed the molecular structure of sulfonated phenolic resin of a detailedanalysis: using gel chromatography and LC-MS determinated the molecular weight;determined the sulfonation degree by mass methods and the ion-exchange method,determined the thermal stabilityby thermal gravimetric analysis, the effective phenol contentwas studied by UV absorption, the major functional groups were measured through infraredanalysis, surface tension of sulfomethylated phenolic resin solution, foam rheology andfluorescence confocal Analysis of sulfur in the liquid film distribution. Evaluation theperformance.On the basic of identifying the molecular structure, reviewed the factors of crosslinkingin high temperature and foaming, in-depth studyed the thickening mechanism athightemperature and causes bubbling of sulfonated drilling fluid. Successfully developed aneffective method to control crosslinking at high temperature and improve the performance ofsulfomethylated phenolic resin at high temperature. Make a clear understanding ofsulfomethylatedphenolicresinfoamingmechanismandcontrolmethod.