Well bore caliper and centralizer apparatus having articulated linkage
Patent
·
OSTI ID:7349228
An earth borehole instrument has a plurality of wear link members adapted to engage the borehole walls which are pivotally attached through articulated mechanical arms both to a fixed collar and to a spring-loaded slidable collar on the instrument. The articulated arms for each wear link member consist of a pair of power arms which are each pivoted at a center point on the wear link adapted to engage the borehole wall and a pair of sensing arms which are pivotally connected, respectively, to the ends of the wear link. In an alternative embodiment, a bow spring is mounted on the underside of the power arms for maintaining the wear link flat against the borehole wall.
- Assignee:
- Dresser Industries, Inc.
- Patent Number(s):
- US 3977468
- OSTI ID:
- 7349228
- Country of Publication:
- United States
- Language:
- English
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