FIELD: pipe.
SUBSTANCE: group of inventions relates to annular barriers, well systems and methods for preserving seals. Annular barrier comprises a tubular part for mounting as part of well tubular structure, an expandable sleeve surrounding tubular part, each end of expandable sleeve being fastened to tubular part by means of a connection part, an aperture in tubular part or connection part, and a safety sleeve having a first connection and a second connection for fastening safety sleeve on outer surface of expandable sleeve and an opening in connection with safety sleeve. Safety sleeve and expandable sleeve define a space which is in fluid communication with annulus through opening, wherein safety sleeve has a middle part arranged between two connections, and opening is arranged closer to one of connections than middle part, enabling fluid communication between space and annulus opposite one of connections through opening.
EFFECT: technical result consists in increased sealing capacity of annular barrier.
20 cl, 19 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| ANNULAR BARRIER WITH SEAL | 2013 |
|
RU2636951C2 |
| ANNULAR BARRIER WITH SAFETY METAL COUPLING | 2012 |
|
RU2630339C2 |
| ANNULAR BARRIER HAVING WELL EXPANSION TUBULAR ELEMENT | 2016 |
|
RU2719855C2 |
| DOWNHOLE EXPANSION TUBE | 2014 |
|
RU2655628C2 |
| ANNULAR BARRIER AND WELL SYSTEM FOR LOW PRESSURE ZONE | 2017 |
|
RU2728157C2 |
| ANNULAR BARRIER WITH CLOSING MECHANISM | 2015 |
|
RU2710578C2 |
| ANNULAR BARRIER WITH VALVE MODULE AND DOWNHOLE SYSTEM FOR EXPANSION IN THE ANNULUS AND PROVIDING ZONE ISOLATION | 2019 |
|
RU2804464C2 |
| PRESSURE INTEGRITY TESTING SYSTEM | 2012 |
|
RU2605854C2 |
| ANNULAR BARRIER WITH ANTI-COLLAPSING UNIT | 2014 |
|
RU2670315C1 |
| ANNULAR BARRIER WITH EXPANSION MODULE | 2016 |
|
RU2734470C1 |
