Wells – Guide for device or conduit – On sucker or pump rod
Patent
1989-10-30
1991-04-09
Kisliuk, Bruce M.
Wells
Guide for device or conduit
On sucker or pump rod
175325, E21B 1710
Patent
active
050056425
ABSTRACT:
An apparatus for centralizing an elongated tool in a tubular member that provides a large centalizing force yet collapses easily when reaching an area of reduced diameter traveling in either direction. The apparatus has multiple pairs of arms, each arm having one end pivotally mounted on the tool with the opposite ends disposed adjacent to each other. The opposite ends of the arms are pivotally connected and a biasing means is provided for moving the opposite ends of the arms radially outward to provide the centralizing force. At least three pairs of arms are mounted on the tool at equal angular positions to accurately centralize the tool. The arms have rollers which contact the casing wall inside diameter which provide a very low friction for conveying the tool in this borehole even in high angle boreholes.
REFERENCES:
patent: 3555689 (1971-01-01), Cubberly, Jr.
patent: 4228593 (1980-10-01), Frank et al.
patent: 4595055 (1986-06-01), Vannier
patent: 4615386 (1986-10-01), Briscoe
patent: 4619322 (1986-10-01), Armell et al.
patent: 4787458 (1988-11-01), Langer
patent: 4790381 (1988-12-01), Armell
patent: 4830105 (1989-05-01), Petermann
Kisliuk Bruce M.
Shell Oil Company
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