Sealing method and apparatus for oil and gas wells

Details Sealing method and apparatus for oil and gas wells Sealing method and apparatus for oil and gas wells

2007-10-23

2007-10-23

Van, Quang (Department: 3742)

Electric heating

Inductive heating

Specific heating application

C219S607000, C166S060000, C166S304000

Reexamination Certificate

active

10084986

ABSTRACT:
Apparatus and method for melting material in the annulus of an oil or gas well and thereby sealing the annulus to prevent shallow gas leakage and the like. Conveniently, the material is positioned within the annulus between the production and surface casing of the well and above the well cement. A heating tool is lowered into position and provides the necessary heat to melt the material. The heating tool may be removed following the sealing of the annulus.

REFERENCES:
patent: 3908763 (1975-09-01), Chapman
patent: 4328865 (1982-05-01), Hall
patent: 4538682 (1985-09-01), McManus et al.
patent: 2208197 (1998-12-01), None
“Use of Pressure Activated Sealants to Cure Sources of Casing Pressure”. Rusch, David W. et al. Society of Petroleum Engineers Paper 55996. 1999.

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