2results about How to "Improve plugging success rate" patented technology

This invention discloses a self-expanding, temperature-resistant elastomer plugging agent for drilling fluids and its preparation method. The plugging agent is composed of the following components in parts by weight: 100 parts of temperature-resistant polyolefin elastomer matrix material, 5-20 parts of polymer composite modified water-absorbing reinforcing agent, 5-15 parts of carboxylated carbon nanotube-PEG water-absorbing reinforcing agent, 5-30 parts of reinforcing material, 10-30 parts of superabsorbent resin, and 0.5-1.5 parts of anti-hydrolysis agent. The plugging agent of this invention possesses excellent elasticity and a certain degree of toughness, allowing it to be squeezed into fractures under pressure. After absorbing water, its volume expands, yet it still maintains a certain degree of elasticity and strength. Under its own elasticity, it increases friction with the fracture surface, increasing the elasticity of the entire sealing layer, preventing the plugging material from flowing back or sliding deeper into the fracture, sealing the leakage channels, and achieving effective sealing of wellbore fractures.

This invention relates to a method for wellbore plugging using end-sand removal technology, specifically a method for wellbore plugging using end-sand removal technology, comprising the following steps: preparing a plugging agent, which includes granular plugging material, fibrous plugging material, and drilling fluid; and classifying them: classifying granular plugging material according to particle size; classifying fibrous plugging material according to fiber length; classifying drilling fluid according to the degree of change in dynamic and static shear forces; selecting granular plugging material, fibrous plugging material, and drilling fluid to obtain a plugging agent required for different types of wellbore leakage fractures; this invention avoids problems such as increased leakage fracture volume and increased plugging difficulty caused by the plugging material entering the leakage fracture and causing secondary fracture expansion during the plugging process, and has a high plugging success rate, short construction period, and low plugging material consumption.