Fluid handling – Processes – Cleaning – repairing – or assembling
Patent
1991-05-09
1991-12-31
Walton, George L.
Fluid handling
Processes
Cleaning, repairing, or assembling
137318, 138 89, 138 94, 138 97, 166 551, 166285, 169 69, 408 30, 408 87, 408130, 408206, B23B 4108, B23B 4718, F16L 4104, F16L 5512
Patent
active
050763113
ABSTRACT:
An apparatus for installing a reopenable shut-off valve into a flowing high pressure pipe, such as the production pipe in an uncontrolled flowing well, utilizes a cylindrical outer saddle member attached around the production pipe and providing a housing for the drilling, finishing and plugging assembly. The saddle is welded directly to the pipe section or attached via an intermediate layer of epoxy to add rigidity and strength to the pipe section. A rotary drill is advanced completely through the surrounding saddle and the internal production pipe and is followed axially by a valve plug. Sealing engagement of the valve plug in the cut hole may be attained by expanding the plug with internal fluid pressure or by utilizing a tapered plug held in sealing engagement with the similarly tapered hole by the application of an axial sealing force. A method for accessing the production pipe at an underground location for attaching the pipe plugging apparatus a safe distance from the well head is also disclosed.
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Marquip Inc.
Walton George L.
LandOfFree
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