Self-excited gas wells downhole sand control device is a device of oil and natural gas production, gas nozzle cap is connected by the lower male upper mother buckle and the throttle buckle, a male buckle and the lower end of the upper female buckle conversion sleeve connection; conversion sleeve upper mother male buckle and the buckle bottom coat jacket connection; end female buckle the upper end and a plug pin connection sleeve body in the circumferential direction, provided with 6 wide slot plug is arranged at the upper end of the male buckle; the lower end of the cone, blind plug; the core set for reducing cylinder, a spring seat, the diameter of the pressure difference between the section body in the circumferential length direction of the opening of 3 channel wide slot,. In the inner gas nozzle cap and conversion sleeve and an outer sleeve is formed within the spring is arranged in the upper cavity; a gas nozzle cap and conversion sleeve and a core sleeve is formed; the bushing is a cylinder, both ends of large diameter and small diameter in the middle and small diameter in the middle part of the circumference of the milling groove 6, A stainless steel wire mesh is arranged around the switch sleeve and the outer ring formed by the outer cover and the plug head, and the direction of the 6 groove is aligned with the direction of the 6 groove of the outer cover.
【技术实现步骤摘要】
【技术保护点】
自激式天然气井井下防砂器，它是由气咀帽（１）、转换套（２）、弹簧（３）、芯套（４）、衬套（５）、外套（６）、不朽钢钢丝网（７）、堵头（８）连接而成，其特征是：气咀帽（１）由上端母扣与节流器的下端公扣连接，其下端公扣与转换套（２）的上端母扣连接；转换套（２）下端公扣与外套（６）的上端母扣连接；外套（６）下端母扣与堵头（８）上端公扣连接，外套（６）本体在圆周方向有６道宽槽。
【技术特征摘要】
【专利技术属性】
技术研发人员：李博，李俊福，张传超，吴田中，张海军，
申请(专利权)人：濮阳市太和测试技术有限公司，
类型：实用新型
国别省市：41[中国|河南]
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