Flow activated sensor assembly

摘要

A sensor assembly for detection of fluid flow signaling over a tubular conveyance. The assembly may be employed for activation of a variety of different downhole actuators such as firing heads for perforating guns or hydrostatic set modules for packer deployment. The assembly is configured with a flow translation device which is disposed in a manner exposed to fluid flow directed through an oilfield tubular coupled to the assembly. Thus, a detector coupled to the translation device may obtain mechanical data from the device which is reliably indicative of the flow, irrespective of the physical nature of the flow itself. As such, enhanced reliability for subsequent actuator firing based on the flow signaling may be achieved.

主权项

1. A flow activated sensor assembly for downhole use in a well, the assembly for coupling to an oilfield tubular for conveying a fluid flow through a channel thereof, the assembly comprising:
a flow translation device for fluid communication with the channel to allow responsive movement upon exposure to the fluid flow; a detector coupled to said device for data communication therewith, said detector configured for triggering activation of an actuator coupled to the assembly based on the data communication; and a backup detection mechanism for triggering upon compromised reliability of the data communication, wherein the backup detection mechanism detects flow of another fluid directed in an annular region.