03-08-2011 дата публикации
Номер: CN0101265792B
Принадлежит:
The invention discloses a sliding sleeve for a hydraulic switch, which belongs to the manufacture technology field of underground tool for cementing operation in the oil and natural gas drilling engineering, and comprises a sliding sleeve structure for switch and a control structure. The sliding sleeve structure for switch comprises an upper joint, a piston sleeve, a switch sleeve, a central tubeand a lower joint, wherein the piston sleeve is sleeved outside the upper joint, the switch sleeve is sleeved outside the central tube, and the lower joint is connected with the lower end of the central tube; the control structure comprises a connecting joint, a cylinder sleeve, a piston rod and a sealing plug, wherein the connecting joint is connected with the cylinder sleeve, the sealing plug is arranged on the lower end of the piston rod, and the control structure is arranged in the upper joint of the sliding sleeve structure for switch. The invention provides a sliding sleeve for hydraulic switch ...
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