Protective sheath for high temperature process wells

Details Protective sheath for high temperature process wells Protective sheath for high temperature process wells

1981-12-03

1983-12-20

Purser, Ernest R.

Wells

Processes

Cementing, plugging or consolidating

166 57, 166209, 138149, F21B 3314, F21B 3600

Patent

active

044211694

ABSTRACT:
Apparatus and method for maintaining the integrity of a cement sheath surrounding a casing in a hot subteranean zone including a layer of compressible refractory insulation surrounding the casing and at least one cement hanger slidably carried by said casing and means for limiting the movement of the hanger on the casing. The insulation layer mechanically isolates the sheath from thermal expansion of the casing and the slidable cement hanger likewise allows limited axial motion of the casing relative to the sheath without inducing tensile loads.

REFERENCES:
patent: 2362829 (1944-11-01), Kinley
patent: 3117628 (1964-01-01), Myers
patent: 3119451 (1964-01-01), Hall
patent: 3379252 (1968-04-01), Heckler et al.
patent: 3380530 (1968-04-01), McConnell et al.
patent: 3677340 (1972-07-01), Blount et al.
patent: 3820605 (1974-06-01), Barber et al.
patent: 3976139 (1976-08-01), Wilder
patent: 4071311 (1978-01-01), Errington

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