# US 2014/0190684 A1 · Extrusion preventing supporting device

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- Number: US 2014/0190684 A1
- Document ID: US20140190684A1
- Status: Published application
- Kind: A1
- Application number: 14/123,431
- Filed: 2012-05-31
- Published: 2014-07-10
- Earliest claimed: 2011-06-03
- Assignees: Interwell Technology AS
- Inventors: Espen Hiorth
- Web page: https://patentgrep.com/patent/US20140190684A1

## CPC

- E21B 33/12: Packers; Plugs (used for cementing E21B33/134, E21B33/16)
- E21B 33/1208: {characterised by the construction of the sealing or packing means (E21B33/1277 takes precedence)}
- E21B 33/1216: {Anti-extrusion means, e.g. means to prevent cold flow of rubber packing}
- E21B 33/128: with a member expanded radially by axial pressure (E21B33/122, E21B33/124 take precedence)
- E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS

## Abstract

The invention relates to an extrusion preventing supporting device (30) comprising interconnected chain elements (40; 50, 55). Outwardly curved ends (42; 57, 58) of the chain elements (40; 50, 55) are adapted to be received by inwardly curved ends (43; 52, 53) of adjacent chain elements (40; 50, 55). Each chain element comprises a through connection bore (44; 54, 59). The extrusion preventing supporting device (30) further comprises one continuous connection wire 70 provided through the respective connection bores (44; 54, 59).

## Claims

### Claim 1

An extrusion preventing supporting device comprising:
interconnected chain elements, where outwardly curved ends of the chain elements are adapted to be received by inwardly curved ends of adjacent chain elements, wherein each chain element comprises a through connection bore and wherein the extrusion preventing supporting device comprises one continuous connection wire provided through the respective connection bores.

### Claim 2 (depends on 1)

The extrusion preventing supporting device according to claim 1, wherein the connection wire is non-stretchable.

### Claim 3 (depends on 1)

The extrusion preventing supporting device according to claim 1, wherein the outwardly curved ends are outwardly hemispherical and the inwardly curved ends are inwardly hemispherical.

### Claim 4 (depends on 1)

The extrusion preventing supporting device according to claim 1, wherein each chain element comprises an outwardly curved front end and an inwardly curved rear end.

### Claim 5 (depends on 1)

The extrusion preventing supporting device according to claim 1, wherein the interconnected chain elements comprise:
a first type of chain element comprising an inwardly curved front end and an inwardly curved rear end; and
a second type of chain element comprising an outwardly curved front end and an outwardly curved rear end;
wherein the outwardly curved front end of the second type of chain element is adapted to be received by the inwardly curved rear end of an adjacent first type of chain element and where the outwardly curved rear end of the second chain element is adapted to be received by the inwardly curved front end of an adjacent first type of chain element.

### Claim 6 (depends on 1)

The extrusion preventing supporting device according to claim 1, wherein each of the interconnected chain elements comprises a substantially cylindrical side surface between a front end and a rear end of the interconnected chain element.