| 摘要 |
A split ball valve that may be positioned in a production string of line pipe, casing, or tubing. The split ball valve comprises a lower valve assembly and an upper valve assembly. Each of two valve doors in the lower valve assembly is connected to a pinion gear that intermeshes with racks on the upper valve assembly. The upper valve assembly can be vertically displaced relative to the lower valve assembly. A spring keeps the upper valve assembly extended away from the lower valve assembly and thus keeps the valve doors closed. When a downward force is applied to the upper valve assembly, the upper valve assembly is downwardly displaced causing the pinion gears to rotate, which opens the valve doors. The valve doors recede into cavities in the valve body. When open, the split ball valve is fully ported.
|
