11-11-2015 дата публикации
Номер: CN0204754890U
Принадлежит:
The utility model provides a gravel pack sand control instrument belongs to oily well equipment field, including the center tube, the center tube is provided with the hole, is provided with the sliding sleeve in the center tube, and the sliding sleeve can be followed the axial of center tube and slided for the center tube, the center tube overcoat is equipped with and fills the inner tube, fills the inner tube overcoat and is equipped with and fills the outer tube, and the pipe wall that fills the outer tube is equipped with the first through -hole that the intercommunication fills the lumen of inner tube, center tube and fill and be provided with the valve between the inner tube for cut off or communicate first through -hole and hole, gravel pack sand control instrument includes still that tail pipe, lower clutch and back -off connect, and the tail pipe cover is established on the sliding sleeve, and with sliding sleeve synchronous motion, the lower clutch cover is established on the tail ...
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