eFire-SL Slickline-Deployed Electronic Firing Head

Overview Library

Fire guns and initiate tool setting with full control of arming, firing, aborting, and rearming

The eFire-SL slickline-deployed electronic firing head is programmable and used to detonate downhole explosives and activate specialized remedial services. The eFire-SL firing head maintains total control of the sequence of operations and the timing of activation. It also recognizes commands sent from the surface and initiates detonation.

Total control from surface

Fully controlled from the surface, the eFire-SL firing head does not require the input of prerecorded downhole parameters to activate the firing process. Instead, it is operated by a coded sequence of slickline-deployed tension pulses, which are converted to pressure pulses in the tool head. A unique combination of these pulses creates the special signature required to communicate with the initiator module.

After a pressure transducer in the tool detects the command from the surface, two separate processors in the controller module are required to independently verify the unique command. The initiator module then converts the battery power to the high voltage required to initiate the S.A.F.E. slapper-actuated firing equipment. The S.A.F.E. equipment and the eFire-Slickline firing head do not include primary explosives.

A preset hydrostatic pressure must enable the firing head before it will accept the command to fire. Once the pressure command is accepted, an arming command is sent from the surface. These safeguards are in addition to the safety provided by the unique pressure pulse command signature. The eFire-SL firing head is radio frequency–safe.

Benefits

  • Save rig or production time by eliminating a run usually required to record downhole parameters prior to the actual perforation run.
  • Reduce risk by excluding primary high explosives.
  • Increase safety with multiple safety barriers and the ability to abort.

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