Patent ID: 11898421
Assignee: SOUTHWEST PETROLEUM UNIVERSITY
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 0:
1. A sand control device for marine hydrate production, comprising an inner-layer sand control cylinder I and an outer-layer sand control screen arranged coaxially from inside to outside, and a motor I configured to drive the inner-layer sand control cylinder I to rotate, wherein a plurality of sand retaining balls are provided between the inner-layer sand control cylinder I and the outer-layer sand control screen; and
further comprising an inner-layer sand control cylinder II and a motor II, wherein the inner-layer sand control cylinder II and the inner-layer sand control cylinder I are arranged coaxially, the inner-layer sand control cylinder II has an outer diameter smaller than an inner diameter of the inner-layer sand control cylinder I, and a plurality of sand retaining balls are also provided between the inner-layer sand control cylinder II and the inner-layer sand control cylinder I, and wherein the motor II is configured to drive the inner-layer sand control cylinder II to rotate, and the rotating direction of the inner-layer sand control cylinder II is opposite to that of the inner-layer sand control cylinder I.