Sealing fluid for setting a packer
AssigneeMaersk Olie Og Gas A/S
InventorsEdo Boekholtz, Hans Van Dongen
Life of this patent
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Abstract
A method and a sealing fluid for setting a packer in an annulus between a well bore and a well tubular is provided, which by adjusting i.a. the density, viscosity and setting time of the sealing fluid is able to provide among other things a full radial seal with an acceptable axial dispersion, in particular in highly deviated wells and/or in wells having eccentric annuli.
Claims20
A method for preparing a sealing fluid for setting a packer in an annulus containing a fluid in a well bore comprising:
- providing a hardenable composition as the sealing fluid,
- measuring the density and temperature of the fluid in the annulus, and adjusting the density of the sealing fluid to the density of the fluid in the annulus within ±5% at the temperature of the fluid in the annulus,
- adjusting the initially mixed viscosity of the sealing fluid to above 1000 cP at the temperature of the fluid in the annulus,
- adjusting the setting time to between 2-30 minutes at the temperature of the fluid in the annulus.
A sealing fluid for sealing an annulus comprising a hardenable or polymerizable epoxy composition comprising an epoxy resin and a hardener wherein:
- a density of the composition is between about 0.97-1.08 g/cm3 @ 80° C.;
- an initial mixed viscosity of the composition is between about is between about 5000-50000 cP @ 80° C.;
- and
- a setting time of the composition is between about 2-30 minutes.
Dependencies are inferred from the claim text.