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Title: Logging tool centralizer

Abstract

This patent describes an apparatus for centralizing an elongated tool in a tubular member. It comprises two pairs of centralizing arms radially displaced about the elongated tool, each pair of arms being pivotally connected at adjacent ends to each other and pivotally connected at opposite ends to the elongated tool; means for causing the opposite ends of each pair of centralizing arms to move closer together, thereby forcing the pivotally connected adjacent ends of each pair of centralizing arms to move radially outward from a retracted position adjacent the elongated tool and into contact with the tubular member; and pivot points set off-center for connecting the opposite ends of the centralizing arms to the elongated tool body, each pair of centralizing arms crossing to reach respective opposite off-center pivot points, the pivot points being functional to prevent the centralizing arms from locking in the retracted position.

Inventors:
Publication Date:
OSTI Identifier:
5117525
Patent Number(s):
US 5005642; A
Application Number:
PPN: US 7-428528
Assignee:
Shell Oil Co., Houston, TX (USA)
Resource Type:
Patent
Resource Relation:
Patent File Date: 30 Oct 1989
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; 03 NATURAL GAS; MATERIALS HANDLING EQUIPMENT; DESIGN; WELL LOGGING EQUIPMENT; POSITIONING; EXPLORATORY WELLS; INSTALLATION; WELL LOGGING; EQUIPMENT; WELLS; 020200* - Petroleum- Reserves, Geology, & Exploration; 030200 - Natural Gas- Reserves, Geology, & Exploration

Citation Formats

Moore, B B. Logging tool centralizer. United States: N. p., 1991. Web.
Moore, B B. Logging tool centralizer. United States.
Moore, B B. 1991. "Logging tool centralizer". United States.
@article{osti_5117525,
title = {Logging tool centralizer},
author = {Moore, B B},
abstractNote = {This patent describes an apparatus for centralizing an elongated tool in a tubular member. It comprises two pairs of centralizing arms radially displaced about the elongated tool, each pair of arms being pivotally connected at adjacent ends to each other and pivotally connected at opposite ends to the elongated tool; means for causing the opposite ends of each pair of centralizing arms to move closer together, thereby forcing the pivotally connected adjacent ends of each pair of centralizing arms to move radially outward from a retracted position adjacent the elongated tool and into contact with the tubular member; and pivot points set off-center for connecting the opposite ends of the centralizing arms to the elongated tool body, each pair of centralizing arms crossing to reach respective opposite off-center pivot points, the pivot points being functional to prevent the centralizing arms from locking in the retracted position.},
doi = {},
url = {https://www.osti.gov/biblio/5117525}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1991},
month = {4}
}