E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/47
E21B 33/03 (2006.01) E21B 34/02 (2006.01)
Patent
CA 1299094
ABSTRACT 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 10 having at least first and second passages therein, which body is operatively mounted on a tubing hanger F supporting casing head S for the first passage to be vertically aligned with a vertical bore 88 in the tubing hanger F and a tubing string 90 that depends from the latter. The first passage 42 in the normal operation of the well has a plug C removably and sealingly disposed therein. A bonnet 58 is removably secured to the body by bolts 60, 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 C 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 C inserted in the first passage 42, the bonnet secured to the body, and the well returned to production.
591042
Fetherstonhaugh & Co.
Reed Lehman T.
LandOfFree
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