Boring or penetrating the earth – With means movable relative to tool to receive – retain – or... – Core-retaining or severing means
Patent
1979-11-26
1981-10-27
Purser, Ernest R.
Boring or penetrating the earth
With means movable relative to tool to receive, retain, or...
Core-retaining or severing means
175255, 175328, 175237, 175403, E21B 2512
Patent
active
042968224
ABSTRACT:
A multipurpose fluid flow assisted downhole tool that is adapted for attachment to the lower end of a pipe string to be extended into a well bore and which is capable of cutting sample cores from subsurface earth formations and removing the cores for evaluation. The tool is also capable of removing ferrous metal objects from the bottom of the well bore by both mechanical and magnetic means in conjunction with object movement assistance that is provided by flowing fluid in the vicinity of the bottom of the well bore. The well servicing tool includes an internal mechanism that has the capability of achieving reverse circulation of fluid in the vicinity of the bottom of the well bore which causes fluid flow from the annulus between the tool and the well bore, upwardly into an internal object collection chamber defined by the well tool and then outwardly of the well tool and upwardly through the annulus between the pipe string and the well bore to the surface. Ferrous objects are attracted by a magnet movably disposed within the object collection chamber and nonferrous objects are transported into the object collection chamber by flowing fluid and are retained therein by a plurality of object retainer fingers defining the bottom portion of the object collection chamber.
REFERENCES:
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patent: 2887347 (1959-05-01), Losey
patent: 2915127 (1959-12-01), Abendroth
patent: 3023810 (1962-03-01), Anderson
patent: 3874465 (1975-04-01), Young et al.
patent: 4059155 (1977-11-01), Greer
K & G Oil Tool and Service Company, Inc. Catalog 54.
Matthews Guy E.
Omega Tools International
Purser Ernest R.
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