Wells – Pistons – fluid driven into well – With stop
Patent
1976-06-28
1977-06-07
Leppink, James A.
Wells
Pistons, fluid driven into well
With stop
E21B 3316
Patent
active
040277305
ABSTRACT:
In pump-down tools for use in well maintenance operations wherein fluids are injected into a well and wherein the tool includes a tubular member having locomotives positioned thereabout and a fluid passageway positioned therethrough and is connected to a fluid injection member positioned in fluid communication with the fluid passageway and the well; the well being equipped with a first tubing member and a second tubing member which are in fluid communication near their lower ends so that the tool is readily moved through the first tubing member by pumping fluid sequentially through the first tubing member, the junction between the first and second tubing member and the second tubing member and is moved in the opposite direction by reverse circulation, an improvement comprising positioning on the tubular member above the locomotives a sealing ring which is releasably maintained in position at a suitable angle from the axis of the tubular member.
REFERENCES:
patent: 3020955 (1962-02-01), Tausch
patent: 3104714 (1963-09-01), Terrel et al.
patent: 3117627 (1964-01-01), Jarboe, Jr. et al
patent: 3361206 (1968-01-01), Raulins
patent: 3464495 (1969-09-01), Childers et al.
patent: 3464496 (1969-09-01), Genois et al.
Continental Oil Company
Leppink James A.
Reinert A. Joe
Scott F. Lindsey
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