US 11,898,421 B2
Sand control device for marine hydrate production
Jinze Song, Sichuan (CN); Shuxian Jiang, Sichuan (CN); Hongjun Zhu, Sichuan (CN); Shuai Liu, Sichuan (CN); and Yue Gao, Sichuan (CN)
Assigned to Southwest Petroleum University, Chengdu (CN)
Filed by Southwest Petroleum University, Sichuan (CN)
Filed on Apr. 19, 2023, as Appl. No. 18/136,357.
Claims priority of application No. 202210457756.3 (CN), filed on Apr. 27, 2022.
Prior Publication US 2023/0349268 A1, Nov. 2, 2023
Int. Cl. E21B 43/08 (2006.01)
CPC E21B 43/08 (2013.01) 9 Claims
OG exemplary drawing
 
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.