Non-weld casing centralizer

Details Non-weld casing centralizer Non-weld casing centralizer

1986-04-11

1987-08-25

Novosad, Stephen J.

Wells

Guide for device or conduit

On sucker or pump rod

E21B 1710

Patent

active

046886362

ABSTRACT:
A centering device or centralizer for mounting on oil well tubings and similar conduit strings, the invention acts to maintain substantially uniform clearance between such strings and a wellbore. The centering device of the invention differs from prior non-welded centering devices in that the present device does not require bending or deformation of any of its structural elements during assembly or disassembly yet displays the necessary stand-off characteristics during utilization of the device within the wellbore to assure uniform clearance between the wellbore and the casing. A particular feature of the invention is an independent retaining ring which securely attaches a plurality of structural elements to form the present centering device.

REFERENCES:
patent: 4042022 (1977-08-01), Wills et al.
patent: 4077470 (1978-03-01), Dane
patent: 4363360 (1982-12-01), Richey
patent: 4520869 (1985-06-01), Svenson

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