Deep plugging agent containing wood dust and gel
A technology of plugging agent and wood chips, applied in sealing/isolation, wellbore/well components, drilling composition, etc., can solve the problems of bearing strength, low residual resistance coefficient, low pressure gradient and high cost
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specific Embodiment approach 1
[0004] Specific embodiment 1: This embodiment is composed of high molecular weight anionic polyacrylamide, phenol composite polyamine, resorcinol, oxalic acid, sawdust, and water with a molecular weight>19 million and a degree of hydrolysis of 25 to 30%. Their weight The percentages are: high molecular weight anionic polyacrylamide with a molecular weight > 19 million and a degree of hydrolysis of 25-30%: 0.15-0.5%, phenolic complex polyamine: 0.1-0.3%, resorcinol: 0.01-0.02%, oxalic acid : 0.1-0.2%, sawdust: 0.5-2.5%, water: 99.14-96.48%, according to the above-mentioned weight ratio, it is formulated into an aqueous solution with a concentration of 0.86-3.52%. The particle size of the sawdust is 0.01-2mm. The production method of this embodiment is: put high molecular weight anionic polyacrylamide, phenol composite polyamine, resorcinol, oxalic acid, sawdust and water into the preparation tank of the plugging agent, and pass the sawdust gel sealing agent Prepare the pump fo...
specific Embodiment approach 2
[0005] Specific embodiment two: This embodiment is composed of high molecular weight anionic polyacrylamide, phenol composite polyamine, resorcinol, oxalic acid, wood chips and water with a molecular weight>19 million and a degree of hydrolysis of 25 to 30%. Their weight The percentages are: high molecular weight anionic polyacrylamide with a molecular weight > 19 million and a degree of hydrolysis of 25-30%: 0.15%, phenolic complex polyamine: 0.1%, resorcinol: 0.01%, oxalic acid: 0.1%, wood chips 0.5% %, water 99.14%, to obtain a blocking agent aqueous solution with a concentration of 0.86%.
specific Embodiment approach 3
[0006] Specific embodiment three: This embodiment is composed of high molecular weight anionic polyacrylamide, phenol composite polyamine, resorcinol, oxalic acid, wood chips and water with a molecular weight>19 million and a degree of hydrolysis of 25 to 30%. Their weight The percentages are: high molecular weight anionic polyacrylamide with a molecular weight > 19 million and a degree of hydrolysis of 25-30%: 0.15%, phenolic complex polyamine: 0.1%, resorcinol: 0.02%, oxalic acid: 0.2%, sawdust 2.5% %, water 97.03%, to obtain a blocking agent aqueous solution with a concentration of 2.97%.
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