Plugging agent applied to oil-based drilling fluid and preparation method thereof

• Main Authors: HUANG ZHIZHONG, ZHOU HONGMIN, MIAO QINGLIN, LI HUI, MENG XIANHU, LI CHENXIN, ZHANG WEI
• Format: Patent
• Language: Chinese; English
• Published: 04.05.2018
• Subjects: ADHESIVES; CHEMISTRY; COMPOSITIONS BASED THEREON; DYES; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP

The invention relates to the technical field of plugging agents applied to oil-based drilling fluids and preparation methods thereof and provides a plugging agent applied to an oil-based drilling fluid and a preparation method thereof. The plugging agent applied to the oil-based drilling fluid is prepared from the following raw materials: white oil, an emulgator, acrylamide, N,N'-methylene bisacrylamide, an oxidization-reduction initiator and water. The plugging agent applied to the oil-based drilling fluid is a polymer gel elastomer, has the same plastic deformation property of an asphalt plugging agent, cannot be dissolved in oil and water, and is low in influence on rheological property of the oil-based drilling fluid; the plugging capability of the plugging agent is superior to that ofthe asphalt plugging agent; the plugging agent is capable of effectively plugging the micro fissures of stratums, preventing the drilling fluid and the filtrate of the drilling fluid from invading into the stratums, maintain