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US 11,067,369 B2Granted
RF attenuating switch for use with explosives and method of using the same
AssigneeSchlumberger Technology Corporation
InventorKenneth Randall Goodman
Life of this patent
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Abstract
A radio frequency attenuating switch including a switch having a first input for connection to an electrical power supply and first and second output leads for connecting a device such as a detonator. One or more RF mitigation devices are connected within one or more of the output leads.
Claims11
A method, comprising:
- deploying a perforating gun into a wellbore, the perforating gun comprising a firing head electrically connecting an electrical power source through a first RF attenuating switch to a first detonator connected to a first plurality of explosive charges and electrically connecting a second RF attenuating switch to a second detonator connected to a second plurality of explosive charges, wherein each RF attenuating switch comprises:
- a first input lead connected to the electrical power source;
- a second input lead connected to the electrical power source;
- a first output lead connected to the detonator;
- a second output lead connected to the detonator;
- and
- a first RF mitigation device connected to a first output lead of the RF attenuating switch;
- a second RF mitigation device connected to a second output lead of the RF attenuating switch, wherein the first and second RF mitigation device comprises a spark gap connected in series with the first and second output leads;
- a first and second resistor connected in parallel with each of the spark gaps;
- and
- detonating the first plurality of explosive charges in response to closing the first RF attenuating switch thereby connecting an electrical power supply to the first detonator.
8 more elements
Dependencies are inferred from the claim text.