Patent ID: 11933167
Assignee: EXPRO NORTH SEA LIMITED
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 8:
9. An electrical contact device for deployment within a metallic well structure, comprising:
a body portion;
a mounting arrangement controllably deployable from the body portion, the mounting arrangement including a plurality of deployment arm arrangements, each deployment arm arrangement circumferentially spaced apart from the others of the deployment arm arrangements, each deployment arm arrangement including a first deployment arm, a second deployment arm, and an electrically conductive pad having a contact surface with first serrations;
wherein in each deployment arm arrangement a first end of the first deployment arm is rotatably attached to the body portion and a second end of the first deployment arm is rotatably attached to the electrically conductive pad, and a first end of the second deployment arm is rotatably attached to the body portion and a second end of the second deployment arm is rotatably attached to the electrically conductive pad, and each deployment arm arrangement is configured to establish an electrical signal path between the electrically conductive pad and the body portion; and
wherein the plurality of deployment arm arrangements are disposable in a stowed configuration and a deployed configuration, and in the deployed configuration the first deployment arm and second deployment arm of each respective deployment arm arrangement are rotated radially outward and the respective electrically conductive pad is translated radially outward, with the contact surface in contact with a wall surface of the metallic well structure in a manner that causes the first serrations of the contact surface to abrade the metallic well surface sufficiently to establish electrical continuity between the engaged metallic well structure and the mounting arrangement;
wherein both the second end of the first deployment arm and the second end of the second deployment arm of each deployment arm arrangement includes second serrations configured to engage the wall surface of the metallic well structure when the respective deployment arm arrangement is in the deployed configuration.