Patent ID: 11952863
Assignee: EXPRO NORTH SEA LIMITED
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 19:
20. A method of operating a downhole tool, the method comprising:
providing a hydraulically functioning element comprising a hydraulic piston housed in a piston housing, wherein the hydraulic piston is configured to move within the housing by hydraulic pressure, and wherein the hydraulically functioning element has an internal environment;
using a membrane to isolate the internal environment of the hydraulically functioning element from a second environment, wherein the internal environment is disposed on a first side of the membrane and a second environment is disposed on a second side of the membrane opposite the first side;
positioning an electrical element configured to conduct an electrical current, with respect to the membrane such that energy generated by the electrical current passing through the electrical element is incident on the membrane; and
applying the electrical current to the electrical element to weaken and/or rupture the membrane when the energy is incident thereon to allow fluid communication between the internal environment and the further environment;
wherein the weakened and/or ruptured membrane allows passage of a fluid from the second environment to the internal environment in a manner that at least partially operates the hydraulically functioning element.