| 摘要 |
An adjustable wellhead collar for positioning around a tubularly cased well or any similar static structure includes a substantially water impermeable disk-like plate having a conical surface extending a substantial radial distance outward and downward from the casing, pipe, pole or post, the disk-like plate having a centrally disposed opening for receiving the upper end of the casing, pipe, pole or post, the opening being surrounded by one or more annular series of marks or perforations, each series defining a removable annular segment for adjusting the size of the opening for receiving multiple sizes of an upper end of the casing, pipe, pole or post, and one or more series of marks or perforations defining at least one removable conduit segment, eccentric with respect to the central opening, for receiving a wiring conduit of a well, with the removable segments being perforated or scored to break along predefined seams.
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