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.
Completed the perforating operation using wireless telemetry
Acoustic activation of the eFire-TCP firing head enabled the well to be perforated quickly and efficiently， eliminating use of pressure pulse activation commands. Bottomhole pressure data delivered in real time by the Signature gauges allowed for critical optimization of underbalance prior to perforating the zone.
After flowing the well at the end of the buildup， a second wireless firing head， located at the bottom of the same toolstring， was activated to test post perforating shock functionality and acoustic communication across the perforating gun string. Feedback and tool status received wirelessly from the eFire-TCP firing head confirmed gun activation， and monitoring of bottomhole pressure confirmed successful perforation minutes later.
Real-time bidirectional communication enabled better informed decision making and validation of objectives before ending the well test. The eFire-TCP firing head enabled by Muzic telemetry successfully activated the perforating guns through wireless commands. This eliminated the use of pressure pulse initiation， achieving Wintershall Norway’s well test and perforating objectives.
APPLICATIONS
1.Wells with little margin for applied pressure
2.Deviated wells
4.Multizone perforating
5.Selective perforating
BENEFITS
1.Increases reliability with no moving parts
2.Requires no applied pressure to activate firing head
3.Operates with wireless telemetry or fluid pulse commands （for contingency scenarios）
4.Provides confirmation when the firing command is received
5.Runs with other mechanical and electronic firing heads
FEATURES
1. Bidirectional communication for feedback from the reservoir and perforating string
2. Safety features for explosives
3. Underbalance control
4. Facilitation of redundant firing configurations
Case study
Wintershall Norway Perforates Interval Using eFire-TCP Firing Head Enabled by Muzic Wireless Telemetry.
Obtain real-time downhole pressure data during perforating operation
Wintershall Norway sought to achieve real-time downhole data transmission during perforating and DST operations. The complexity of well test operations requires real-time access to accurate bottomhole pressure data to monitor well performance， enable informed decision making， and optimize test duration. Real-time bottomhole pressure information is also valuable to help optimize pressure underbalance before perforating the well.
Design integrated solution featuring eFire-TCP firing head enabled by Muzic telemetry
Schlumberger recommended Wintershall Norway run the eFire-TCP firing head enabled by Muzic wireless telemetry， which combines two field-proven technologies into a single firing head—IRIS intelligent remote implementation system and Muzic telemetry.
SOLUTION
Run eFire-TCP tubing-conveyed perforating electronic firing head and Signature quartz gauges—both enabled by Muzic wireless telemetry—to obtain continuous transmission of downhole pressure， efficiently activate perforating guns， and monitor DST data.
RESULTS
1.Activated the firing head quickly and reliably using acoustic firing commands.
2.Optimized perforations under optimal underbalance conditions.
3.Confirmed perforating gun activation through downhole real-time pressure monitoring.
4.Completed the industry’s first post- perforating activation through application of wireless telemetry.
5.Verified successful use of wireless telemetry for multiple perforating operations.
石油圈
