Gravel packing of wells with flow-restricted screen

Details Gravel packing of wells with flow-restricted screen Gravel packing of wells with flow-restricted screen

1991-06-11

1992-11-24

Melius, Terry Lee

Wells

Processes

Graveling or filter forming

166 51, 166227, 166242, E21B 4304

Patent

active

051654768

ABSTRACT:
A method and apparatus for gravel packing an interval of a wellbore wherein a permeable screen having a means for restricting fluid flow from the annulus into the upper portions of the screen is positioned adjacent the wellbore interval. The flow-restrictive means may be comprised of any material which remains substantially solid during circulation of the gravel slurry but preferably is a material that can be removed, e.g. by melting or dissolving, after the gravel has been placed. Examples of such material are (1) blends of waxes; (2) eutectic compounds formed by combining organic compounds; (3) salts; and (4) asphaltenes which are soluble in crude oil. The flow-restrictive means also may be formed of a perforated metal sleeve which is dissolvable by acid.

REFERENCES:
patent: 3768563 (1973-10-01), Blount
patent: 4202411 (1980-05-01), Sharp et al.
patent: 4239084 (1980-12-01), Sharp et al.
patent: 4487259 (1984-12-01), McMichael, Jr.
patent: 4621692 (1986-11-01), Mondshine
patent: 4945991 (1990-08-01), Jones

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