LARGE BORE AUTO-FILL FLOAT EQUIPMENT |
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| 申请号 | EP11787227 | 申请日 | 2011-05-24 | 公开(公告)号 | EP2576958A4 | 公开(公告)日 | 2017-04-12 |
| 申请人 | BLACKHAWK SPECIALTY TOOLS LLC; | 发明人 | GROESBECK BRAD; ARCEMENT JEFFREY; JORDAN JOHN; MARTENS JAMES; | ||||
| 摘要 | An auto-fill type float collar assembly is provided. The float collar assembly of the present invention has at least one curved flapper-style valve, preferably constructed of composite, non-metallic material. Each flapper of the present invention has a substantially 90° range of motion, and is closed via a torsion spring. Each flapper is held in the open (or “auto-fill”), position via an external shifting mechanism passing around, rather than through, the central flow bore of the assembly. A floatable actuation ball can be run with the tool, or pumped downhole, in order to selectively actuate the assembly and close the flappers when desired. | ||||||
| 权利要求 | |||||||
| 说明书全文 | |||||||
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