Measuring and testing – Borehole or drilling – Downhole test
Patent
1977-09-19
1978-11-14
Myracle, Jerry W.
Measuring and testing
Borehole or drilling
Downhole test
E21B 4700
Patent
active
041250133
ABSTRACT:
In the representative embodiment of the new and improved apparatus disclosed herein, a so-called "stuck-point indicator" or "freepoint-indicator" tool includes a deformation-responsive sensor tandemly supported between upper and lower selectively-operated tool anchors of a unique arrangement which, in the preferred embodiment of the tool, are cooperatively arranged to be sequentially engaged with longitudinally-spaced wall portions of a string of well pipe believed to be stuck in a well bore. In the disclosed embodiment of the tool, each tool anchor respectively includes a set of pivoted anchor members and actuating links adapted to swing the anchor members outwardly into anchoring engagement with the pipe wall for securing the tool against longitudinal movement in the pipe string. To further secure or stabilize the tool against wobbling or angular movement in the pipe string, the pivoted actuating links are cooperatively arranged to become wedged against the opposed side walls of elongated grooves on the tool body as the anchor members engage the pipe wall.
REFERENCES:
patent: 3585857 (1971-06-01), Moore
patent: 3686943 (1972-08-01), Smith
Nicolas Yves
Tromelin Jacques
Archambeau, Jr. Ernest R.
Myracle Jerry W.
Schlumberger Technology Corporation
Sherman William R.
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