Tubing end locating apparatus for wellbores

Details Tubing end locating apparatus for wellbores Tubing end locating apparatus for wellbores

1990-08-09

1992-05-19

Williams, Hezron E.

Measuring and testing

Borehole or drilling

Downhole test

166255, E21B 4300

Patent

active

051137038

ABSTRACT:
The lower end of a wellbore tubing string or a change in diameter of a wellbore component may be sensed by an apparatus connectable to the end of an elongated coilable tubing for insertion into the tubing string and responsive to movement of the apparatus into or out of the end of the tubing string to effect a change in flow of fluid being conducted through the coilable tubing. The apparatus includes opposed arms engageable with the bore of the tubing string and engageable with a piston member to effect closure of ports in the apparatus to change the flow of fluid through the tubing in response to movement of the arms into or out of the end of the tubing string. Alternate embodiments include bypass passages for conducting pressure fluid to a packer or wellbore tool.

REFERENCES:
patent: 2859013 (1958-11-01), Peterson
patent: 3696865 (1972-10-01), Chapman
patent: 3867985 (1975-02-01), Wilkinson
patent: 3888306 (1975-06-01), Wetzel
patent: 4407157 (1983-10-01), Lichtenberg

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