eFire Electronic Firing Head | Schlumberger

eFire-TCP Enabled by Muzic Telemetry

Tubing-conveyed perforating electronic firing head enabled by Muzic wireless telemetry

Better understand and communicate with the reservoir

The eFire-TCP tubing-conveyed perforating electronic firing head enabled by Muzic wireless telemetry combines two field-proven technologies into a single firing head—IRIS intelligent remote implementation system and Muzic telemetry. This combination of technology enables you to trigger the perforating guns using acoustic signals compared with conventional technology that requires pressure pulse commands. It does this by combining sensors, battery power, microprocessors, and control switches—replacing rupture discs, shear pins, and other mechanical activation devices, which require high overpressure or mechanical movement of the toolstring. This also ensures optimal underbalance conditions are achieved prior to firing the perforating guns.

Achieve wireless control, firing efficiency, and redundancy

This firing head consists of two sections. The upper Muzic telemetry section consists of a pressure transducer assembly mounted with a Muzic telemetry modem. The lower eFire-TCP head section consists of a firing head cartridge and battery rated at 330 degF and 20,000 psi for 100 h.

Once the wireless command is generated through the Muzic telemetry acquisition controller interface from surface, it is transmitted downhole through the repeater network to the firing head. After the command to fire reaches the eFire-TCP firing head enabled by Muzic telemetry, it returns to the surface to confirm gun initiation.

Standard fluid pulses can also be used to initiate the gun string. The pressure transducer provides measurements to the electronics cartridge. When a firing command is detected, the initiator module triggers the guns as described.

eFire-TCP tubing-conveyed perforating electronic firing head enabled by Muzic wireless telemetry.

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