FIELD: mining.
SUBSTANCE: group of inventions relates to well completion operations. Projectile for completion is intended for lowering in well using wellhead equipment or blowout preventer and consists of casing string having first end, drilling pipe having first and second ends, passing through wellhead equipment or blowout preventer and connected with possibility of first end disconnection to casing and retaining casing string during casing string lowering in well. At that, said casing comprises group of tubular sections. At least two sections represent annular barrier sections. Each section includes at least one; annular barrier. Annular barriers are arranged at specified distance from each other. Each annular barrier comprises expanding coupling surrounding tubular part. Expanding coupling is connected with tubular part. Tubular part forms part of casing string and has hole for inlet of fluid under pressure in order to expand coupling, and second end, which is closed. At that, projectile for well completion additionally contains pressure creation device, connected by fluid with second end of drill pipe to create fluid pressure inside drill pipe and inside casing string, which is higher than that of formation fluid, and serves to expand expanding coupling of at least two sections of annular barrier.
EFFECT: higher efficiency of completion due to its simplification and reduction of time.
19 cl, 17 dwg
