Introducing the PX-1 Expendable Fireset
Improved perforating safety should be offered as:
(a) an expensive option.
The need for radio silence during explosives operations is:
very costly to eliminate.
(b) a thing of the past.
During perforating jobs, electric
welding and helicopter flights should be:
(b) continued as normal.
Typical PX-1 output pulse
| PX-1 = Pulse eXpendable1|
EBW = Exploding Bridge Wire
EFI = Exploding Foil Initiator
Of Course, you'd like to complete all the above statements with option (b),
and now you can. Designed and certified to be immune to the stray voltages and RF environment typically found on well
sites and offshore platforms, the PX-1 from Ecosse is a low-cost, high performance EBW/EFI fireset that allows normal
oilfield operations to continue while perforating and other completion services are being performed.
Radios stay on; communication links are unbroken; helicopter flights continue; construction work is
uninterrupted; production is unaffected; the use of sensitive primary explosives is avoided. All of these advantages
are available with the PX-1 fireset from Ecosse.
Designed primarily for oilfield applications, the PX-1 generates the high-current pulse needed to initiate
EBW and EFI detonators. With features that complement the safety characteristics of these detonators. compact
dimensions that allow it to be used in gun systems down to 1-3/8in OD, a low cost that allows it to be discarded after
one use, and a temperature rating greater than any other system on the market, the PX-1 is a flexible and affordable
tool that will immediately improve your bottom line.
"The PX-1 firing tool safety features operated as intended to prevent accidental
firing due to the effects of RF interference and stray voltages as might typically be found in the oilfield
environment. These electrical safety features also successfully provided protection against a direct lightning strike
to the wireline. The PX-1 Firing System, therefore, meets its design requirements by allowing perforating operations
to be conducted without interrupting radio communications, welding operations, cathodic protection systems, or other
potential sources of stray voltages."
Quote from certification report by Orion International Technologies Inc
| What are EBW and EFI Detonators?|
EFI detonators were originally developed for use in military applications. They need a very fast rising,
high-current pulse for successful initiation, such as the output provided by the Ecosse PX-1.
conventional hot-wire and hot-resistor detonators normally used in oilfield perforating operations, EBW and EFI
detonators do not contain sensitive primary explosives such as lead azide.
The greatest advantage of EBW and EFI detonators for oilfield use is the fact that
they are extremely insensitive to accidental initiation. They are effectively immune to the Radio Frequency (RF)
sources and stray voltages found on well sites and offshore platforms, which means radio transmitter, electric
welding and cathodic protection equipment need not be turned off during perforating and other wireline
| Which type to use?|
EBWs are generally easier
to initiate than EFIs, which makes them more tolerant of imperfect wiring methods and allows them to be fired
over relatively long lengths of wire. EBWs are also less expensive than EFls, typically costing about the same
as conventional hot-wire detonators. Oilfield EBWs are available using RDX and CP explosives, giving them useful
temperature ratings of 163°C (325°F) and 204ºC (400ºF) respectively.
EFls are more difficult to
initiate than EBWs, and they are typically 2-4 times more expensive. However, they use high-temperature
explosives such as HNS, which means they can be used at higher temperatures than EBWs.
Contact Ecosse for a copy of the certification report, or to learn
more about the PX-1. For information on EBW and EFI detonators, contact RISI.
Safety features (tested immune to)|
AC:||40Hz - 20kHz 600VAC|
32kHz - 2MHz l00VAC
RF interference:||56kHz - 500MHz 50V/m|
500MHz- lGHz l00V/m
lGHz- 1 8GHz 300V/m
Electrostatic discharge:||25kV 500pF 5kohm|
30kV 400pF 250ohm
Lightning strike:||nearby 20kA l00m|
direct strike 70kA / 280A
Size (LxWxH):||5in x 0.82in x 0.74in (<1.06in dia)|
Temperature:||-25°C to +225°C /2 hrs|
Input:||200-230VDC ~ 160-260mA|
Output:||5000V / >2000A / <250ns|
Will fire EBWs through 10ft of twisted-pair wire,
EFIs through 6in of twisted-pair wire
Rated lifespan:||1 x 1-sec test-fire into 100ohm load,|
1 x ffill discharge into detonator
|NOTES: All safety features were tested and certified at Sandia National
Laboratories by Orion International Technologies Inc. All tests were done at ambient temperature, and
all tests (apart from the lightning strikes) were repeated at 93°C - 121°C.|
To purchase PX-1 firesets or to obtain a copy of the certification report, contact Spartek Systems, Inc. at:
Spartek Systems, Inc.
#1 Thevenaz Industrial Trail
Sylvan Lake, AB, Canada
Phone: (403) 887-2443
Fax: (403) 887-4050
To purchase RDX-based EBW and HNS-based EFI detonators, or to purchase PX-1 firesets, contact RISI