Wells – Processes – Parallel string or multiple completion well
Patent
1995-12-14
1997-10-28
Neuder, William P.
Wells
Processes
Parallel string or multiple completion well
166 50, E21B 4314
Patent
active
056809018
ABSTRACT:
A method for receiving hydrocarbon flow from multiple radial wells drilled in a single borehole which includes the steps of providing a principal vertical or horizontal cased well; positioning an inner casing within a portion of a cased well, the inner casing sealed at its upper and lower end portions against the wall of the outer casing and having a flowbore through it, the inner casing defining a radial tie back assembly; lowering a drill string into the assembly and drilling a radial well through the wall of the outer casing; retrieving the drill string and lowering a production liner into the inner casing; sealing around the wall of the liner so that all production from the formation flows through the liner to a point inside the inner casing; positioning a second length of inner casing at a point above the first length of casing, and repeating the steps of producing flow from a radial well out of that particular length of casing positioning a second radial tie back assembly at a point above the first radial tie back assembly, and drilling a radial well therefrom for receiving production from the radial tie back assembly; and allowing hydrocarbons within the formation to flow from the lowermost radial tie back assembly through a continuous bore in any radial tie back assembly placed above the lowermost assembly, so that all the hydrocarbons from the radial wells bored out of the single borehole would flow unimpeded to the surface.
REFERENCES:
patent: 4489782 (1984-12-01), Perkins
patent: 5115872 (1992-05-01), Brunet et al.
patent: 5388648 (1995-02-01), Jordan, Jr.
patent: 5564503 (1996-10-01), Longbottom et al.
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