Centralizer for well casing

Details Centralizer for well casing Centralizer for well casing

1991-01-28

1992-03-24

Bui, Thuy M.

Wells

Processes

Assembling well part

166213, E21B 1710

Patent

active

050979051

ABSTRACT:
An improved centralizer for well casing, comprising an externally threaded upper anchor fixed to the casing, an upper collar threaded to the upper anchor, a lower anchor fixed to the casing, a lower collar bearing against said lower anchor, and a plurality of relatively flexible metallic straps extending between the collars. The centralizer is assembled over a section of well casing as the casing is lowered into the well. When the casing reaches its final depth, it is rotated so that the anchors rotate with the casing, while the collars and the straps remain stationary, as the straps engage the wellbore. When the casing is thus rotated, the upper collar moves along the threads of the upper anchor towards the lower collar, axial movement of which is prevented by the lower anchor. This forces the straps to bulge outwardly away from the casing, urging the casing toward the center of the borehole.

REFERENCES:
patent: 1801334 (1931-04-01), Dalldorf et al.
patent: 2311768 (1943-02-01), McCray
patent: 2368737 (1945-02-01), Badgley
patent: 3292705 (1966-12-01), Hall, Sr.
patent: 3614139 (1971-10-01), Harrison

Affiliated with

Also associated with

Rating

Centralizer for well casing does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Centralizer for well casing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Centralizer for well casing will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2003093