Bimetallic well screen use in injection wells and method of maki

Details Bimetallic well screen use in injection wells and method of maki Bimetallic well screen use in injection wells and method of maki

1981-04-28

1983-04-05

Leppink, James A.

Wells

Screens

Spiral

E21B 4308

Patent

active

043788408

ABSTRACT:
Mounting arrangement for a bimetallic pipe base well screen which must operate at elevated temperatures utilizes a weld for joining one end of a cylindrical screen member to the outer surface of an internal pipe member which has perforations along a portion of its length underlying the well screen. The opposite end of the screen member, which has a greater temperature coefficient of expansion than the pipe base, has an internal boss or ring portion which, at room temperature, has a smaller inner diameter than the outer diameter of the pipe base. The ring portion is heated and shrunk-fit onto the pipe base to a degree that at operational temperatures it will either expand slightly out of contact with the pipe base, or at least become substantially unstressed, thus preventing damage to the screen member while also blocking out the entry of particles.

REFERENCES:
patent: 3937281 (1976-02-01), Hornsberger
patent: 3958634 (1976-05-01), Smith
patent: 4167972 (1979-09-01), Sears
patent: 4284138 (1981-08-01), Allred

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