发明授权
- 专利标题: Multi-port cementing head
- 专利标题(中): 多端口固井头
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申请号: US09115360申请日: 1998-07-14
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公开(公告)号: US06182752B2公开(公告)日: 2001-02-06
- 发明人: Sidney K. Smith, Jr. , William B. Preece
- 申请人: Sidney K. Smith, Jr. , William B. Preece
- 主分类号: E21B2300
- IPC分类号: E21B2300
摘要:
A plug-dropping head capable of dropping balls or plugs or other objects is disclosed. The plug-dropping head has a compact design with a cylinder having multiple chambers for storage of plugs and/or balls. The device can be actuated manually or automatically, locally or remotely, to rotate the cylinder to present a different bore in alignment with a flowpath through the housing. An exterior signal indicates that the object has fallen through the device. An indexing feature assures alignment of the individual bores in the cylinder which contain a plug or wiper with the main passage through the tool. Flow can be maintained through the tool as the cylinder is rotated. Rotation of the cylinder allows an obstruction device in the flowpath to move out of the way to allow the ball or plug to drop when sufficient alignment is reached.
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