Ball valve |
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| 申请号 | EP95302877.6 | 申请日 | 1995-04-27 | 公开(公告)号 | EP0679796A3 | 公开(公告)日 | 1997-01-02 |
| 申请人 | HALLIBURTON COMPANY; | 发明人 | Noack, Timothy; Allred, Wesley R.; | ||||
| 摘要 | A ball valve which can be used to cut coiled tubing extending therethrough, includes a ball (154) rotatably disposed within a housing and adjacent to a seat (152). Control arms (156,158) prevent relative longitudinal movement between the ball (154) and seat (152). The ball defines a pair of slots (202,204) therein, each slot having a bearing surface. A pair of control pins (164,166) are disposed on opposite sides of the ball and rotatably disposed in corresponding control frames (160,162) disposed on opposite sides of the ball. Each control pin (164,166) has an end (208) with a bearing surface (206,212) thereon extending into a corresponding slot (202,204) in the ball so that flat contact is provided between the control pin and the ball. This greater area of contact between the pins (164,166) and the slots (202,204) allows a greater load to be transmitted to the ball to provide the shearing load necessary to shear relatively large diameters of coiled tubing which extend through the open valve. The valve is opened and closed by pressure actuation of a piston. | ||||||
| 权利要求 | |||||||
| 说明书全文 | |||||||
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