Wells – Processes – Graveling or filter forming
Patent
1981-12-03
1984-01-31
Novosad, Stephen J.
Wells
Processes
Graveling or filter forming
166295, E21B 4304
Patent
active
044284276
ABSTRACT:
Sand or similar material coated with a polymerizable resin and catalyst is suspended in a viscous fluid carrier. Such a composition is useful for introduction into a wellbore to effect gravel packing of washed-out cavities surrounding the wellbore. The viscous fluid carrier serves to maintain a heterogeneous suspension of sand as the composition is flowed down through the wellbore, so as to prevent premature settling of sand into gradient layers and voids. The fluid carrier includes a polymeric thickener and a small concentration of viscosity-enhancing agent, such as a dye. The viscosity-enhacing agent is effective to alter the configuration of polymeric thickener so as to enhance the viscosity imparted thereby.
The sand or gravel included in the gravel packing composition is coated with a polymerizable resin and latent catalyst. At formation condition, the resin polymerizes and links together adjacent sand particles thereby forming a permeable consolidated structure which serves to reestablish washed-out zones near a wellbore. Corresponding methods for utilizing the compositions in gravel packing washed-out cavities surrounding a borehole are disclosed.
REFERENCES:
patent: 3780807 (1973-12-01), Graham et al.
patent: 3799262 (1974-03-01), Knight
patent: 3867986 (1975-02-01), Copeland
patent: 3929191 (1975-12-01), Graham et al.
patent: 4018282 (1977-04-01), Graham et al.
patent: 4081030 (1978-03-01), Carpenter et al.
patent: 4110275 (1978-08-01), Sifferman et al.
patent: 4127173 (1978-11-01), Watkins et al.
patent: 4247430 (1981-01-01), Constein
Getty Oil Company
Neuder William P.
Novosad Stephen J.
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