Borehole centralizer with positively indexable contact arms

Details Borehole centralizer with positively indexable contact arms Borehole centralizer with positively indexable contact arms

1981-07-31

1984-01-17

Novosad, Stephen J.

Wells

Guide for device or conduit

On sucker or pump rod

175325, E21B 1710

Patent

active

044259662

ABSTRACT:
An earth borehole instrument having a plurality of contact arms which are forced against the borehole side-walls so as to centralize the instrument in the hole. The contact arms may be either left free to rotate or may be positively locked in a number of non-rotational positions. This locking is done by fixedly engaging an indexing member, which is restricted to movement only in translation as to the instrument shaft, with the contact arms, thereby similarly restricting their movement.

REFERENCES:
patent: 808004 (1905-12-01), Bryant
patent: 2618342 (1952-11-01), Meyer
patent: 2719361 (1955-10-01), Montgomery et al.
patent: 2931440 (1960-04-01), Lebourg
patent: 3045767 (1962-07-01), Klassen
patent: 3343890 (1967-09-01), Homer
patent: 3977468 (1976-08-01), Brewer et al.
patent: 4040757 (1977-08-01), Pauli
patent: 4219081 (1980-08-01), Howe

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