Casing structures having core members under radial compressive f

Details Casing structures having core members under radial compressive f Casing structures having core members under radial compressive f

1984-02-27

1985-05-07

Novosad, Stephen J.

Wells

Valves, closures or changeable restrictors

Fluid operated

166242, E21B 3313

Patent

active

045152187

ABSTRACT:
Casing hardware, such as float collars and shoes, are used in oil well cementing operations. Some of the collars and shoes are constructed of a steel casing with a concrete core inside the casing. The casing structure of the collars and shoes now available places the core under a predominantly shearing force, so that it will fail at relatively low downhole differential pressures. The present invention provides a new design for the casing structure, which places the concrete core under a predominantly compressive force, and greatly increases the amount of pressure the core can withstand without failing.

REFERENCES:
patent: 3162246 (1964-12-01), Wright
patent: 3481397 (1969-12-01), Baker
patent: 4442894 (1984-04-01), Callihan et al.

Affiliated with

Also associated with

Rating

Casing structures having core members under radial compressive f does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Casing structures having core members under radial compressive f, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Casing structures having core members under radial compressive f will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1794177