公开(公告)号：US3642623A

公开(公告)日：1972-02-15

申请号：US3642623D

申请日：1969-10-10

Applicant: OIL BASE

Inventor： BENNETT ROBERT B ,  MCMORDIE WARREN C JR

IPC: C09K8/36 ,  C09K3/00 ,  B01F17/42

CPC classification number: C09K8/36 ,  Y10S507/91 ,  Y10S516/05 ,  Y10S516/07

Abstract: STABILIZATION OF OIL CONTINUOUS PHASE WELL FLUIDS, PARTICULARLY OIL BASE DRILLING FLUIDS, AGAINST CONTAMINATION WITH WATER-SOLUBLE ALKALINE EARTH SALTS, E.G., CALCIUM CHLORIDE, IS ACCOMPLISHED BY ADDITION OF A NOVEL ADDITIVE SYSTEM COMPRISING A WATER-SOLUBLE ACID-BLOCKED ALKANOLAMIDE NONIONIC SURFACTANT, A SULFONATED ACID ANIONIC SURFACTANT AND AN OIL-SOLUBLE NONIONIC ETHOXYLATED ALKYL PHENOL. THE ADDITIVE SYSTEM CONTROLS THE WATER WETTABLE SOLIDS IN AN OIL BASE WELL FLUID SYSTEM IN THE PRESENCE OF ALKALINE EARTH SALTS FOR EXTENDED PERIOD AT HIGH TEMPERATURE KEEPING SUCH SOLIDS IN THE OIL-WET STATE.