Circumferential centralizer

Details Circumferential centralizer Circumferential centralizer

1976-02-02

1977-08-02

Leppink, James A.

Wells

Pistons, fluid driven into well

166241, 277149, E21B 4100

Patent

active

040390276

ABSTRACT:
Disclosed is a pumpdown tool for a well, the tool including a housing having a circumferentially extending seal on its outer surface and having a circumferential centralizer to protect the seal while the tool is being run in the well tubing.

REFERENCES:
patent: 1896482 (1933-02-01), Crowell
patent: 2007691 (1935-07-01), Phillips
patent: 2373880 (1945-04-01), Driscoll
patent: 2411667 (1946-11-01), Mowrey
patent: 2499952 (1950-03-01), Harbison
patent: 2590245 (1952-03-01), Harbison
patent: 3420536 (1969-01-01), Grover
patent: 3692108 (1972-09-01), Soulie et al.
patent: 3814445 (1974-06-01), Bitzan

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