| 摘要 |
FIELD: oil and gas production industry, particularly methods or devices for cementing, for plugging holes, crevices, or the like. ^ SUBSTANCE: device comprises production pipe string with pipe string arranged inside it. Production pipe string is provided with liner. Pipe string has cup located at end thereof. The cup has outer thrust. Radial channels are formed in low pipe string part. Disc valve with seat is installed between production pipe string and liner. Seat has rupturable member, which retains the disc valve in opened position. Cup may seal disc valve seat and cooperate with rupturable member. ^ EFFECT: simplified technology of waterproofing composition preparation and increased waterproofing operation efficiency. ^ 2 dwg |
