Patent ID: 9562413
Date: 2017-02-07
CPC Classifications: E21B

Claim:
1. A plugging device comprising: a housing; a packer device provided circumferentially around the housing, wherein the packer device comprises a packer body and is configured to be provided in a retracted state and an expanded state, wherein a radial radius of the packer body in the expanded state is larger than the radial radius of the packer body in the retracted state; a first supporting assembly supporting a first side of the packer device in the expanded state; and a second supporting assembly supporting a second side of the packer device in the expanded state, wherein the packer device comprises a supporting device for supporting the packer body in the expanded state, wherein the first and second sides of at least one of the packer device and the supporting device have a same circumference in the retracted state and the expanded state, wherein the circumference is larger than a circumference of the housing, wherein the supporting device comprises a chain comprising interconnected chain elements, and wherein a connection bore is provided between a front end and a rear end of each chain element and wherein a connection wire is inserted through the connection bore of each chain element.