公开(公告)号：US3634235A

公开(公告)日：1972-01-11

申请号：US3634235D

申请日：1967-12-21

Applicant: OIL BASE

Inventor： WILSON DOYNE L ,  BENNETT ROBERT B

IPC: C09K8/32 ,  C10M1/08

CPC classification number: C09K8/32 ,  Y10S507/91

Abstract: PRE-TEATMENT OR POST-TREATMENT OF OIL BASE DRILLING FLUIDS FOR OIL WELL APPLICATIONS FOR PURPOSES OF STABILIZING THE FLUID AGANINST DETERIORATION UPON CONTAMINATION WITH WATER BASE DRILLING FLUIDS, WITH OR WITHOUT CLAY SOLIDS, IS EFFECTED BY ADDING TO THE OIL BASE FLUID AN AMPHOTERIC SURFACE-ACTIVE AGENT CONTAINING BOTH ANIONIC AND CATIONIC SURFACE-ACTIVE GROUPS. EXEMPLARY COMPOUNDS WHICH ARE EXTREMELY EFFECTIVE SUFACE-ACTIVE AGENTS IN THE FUNCTION ARE AMINES AND BETAINES WHICH CONTAIN ONE OR MORE CARBOXYL OR CARBOXYLATE GROUPS. ENHANCED EFFECTS ARE ALSO AVAILABLE EMPLOYING SUCH AMPHOTERIC COMPOUNDS WITH SUFONATE TYPE ANINIC SURFACE-ACTIVE AGENTS.

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.