| 摘要 |
A diversionary spool assembly for the completion hook up of any type of oil and gas well without the use of an expensive and cumbersome valve tree as a permanent part of the producing well. A single valve tree is provided, and is removably mounted on any one of a group of wells provided with diversionary spool assemblies only when a particular well in that group requires maintenance or remedial work to be performed thereon. Each diversionary spool assembly includes a rigid body having at least first and second passages therein, which body is operatively mounted on a tubing hanger supporting casing head for the first passage to be vertically aligned with a vertical bore in the tubing hanger and a tubing string that depends from the latter. The first passage in the normal operation of the well has a plug removably and sealingly disposed therein. A bonnet is removably secured to the body by bolts, which bolts are also capable of removably securing the anchor flange of a valve tree to the body to permit maintenance and remedial work to be performed on the well when the plug is removed from the first passage. When the remedial and maintenance work has been completed, the valve tree is removed from the body, the plug inserted in the first passage, the bonnet secured to the body, and the well returned to production.
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