Plugging agent suitable for large leakage, its preparation method and leaking stopping technology
A plugging agent, a large-scale technology, applied in the field of oil drilling, can solve the problems of loss of plugging time and plugging costs, bridge plug plugging can not meet the requirements, increased probability of well leakage recurrence, etc., to save plugging time and plugging Leakage costs, enhance the success rate of a single plugging, and improve the effect of a single plugging success rate
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[0029] Example 1
[0030] A plugging agent suitable for large-scale leakage, including the following components in mass ratio: water: HSD (HHH): HD-1: HD-2: LD-102: DF-A: barite = 100: 12: 4 :7:4:30, among which, HSD (HHH) is an acid-soluble plugging agent for drilling fluid, the main component is asbestos fiber; HD-1, HD-2 are comprehensive plugging agents for drilling fluid, the main component is walnut shell , Almond husk, cotton seed husk, sawdust, and palm silk are crushed and mixed. Type 1 is mainly coarse-grained, and type 2 is mainly fine-grained; LD-102 is rubber particles for drilling fluid with a particle size of 5 mesh; DF-A is One-way pressure plugging agent for drilling fluid; barite is a weighting agent for drilling fluid, chemical formula BaSO4, particle size 20 mesh, and the above medicines are available in the market.
[0031] A preparation method of a plugging agent suitable for large-scale leakage is prepared by the following components in the following mass ra...
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[0035] Example 2
[0036] 3500ml water+0.4%GD-1+6%DF-A+5%HD-2+2%LD-102+0.4%GD-1 glue-based slurry sand bed plugging experiment
[0037]
Example Embodiment
[0038] Example 3
[0039] 3500ml water+0.8%GD-1+15%HD-1+4%HD-2+4%LD-102+3%DF-A+20%limestone+3%stone
[0040]
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