Patent ID: 11927074
Assignee: HALLIBURTON ENERGY SERVICES, INC.
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 6:
7. A method for activating a downhole device, comprising:
providing a communications sub, the communications sub including:
a fluid chamber;
a pressure-activated indexing device positioned within the fluid chamber, the pressure-activated indexing device including a lock mandrel configured to incrementally move between an engaged state and a disengaged state; and
a latch body positioned in the fluid chamber, the latch body configured to be fixed in place by the lock mandrel and close a fluid path from the fluid chamber to a control line when the lock mandrel is in the engaged state, and configured to be allowed to move and open the fluid path from the fluid chamber to the control line when the lock mandrel is in the disengaged state, wherein the lock mandrel radially supports the latch body when in the engaged state and radially de-supports the latch body when in the disengaged state; and

subjecting the pressure-activated indexing device to two or more pressure cycles to move the lock mandrel between the engaged state and the disengaged state and allow the latch body to move to open the fluid path between the fluid chamber and the control line coupled to a downhole device.