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Pressure Pulse Gas Guns - 1,500 or 3,000 psi

Pressure Pulse Gas GunsThe large-chamber stainless steel construction of the Pressure Pulse Gas Guns make them them an integral part of fluid level testing from
Sage Technologies. The Pressure Pulse Gas Gun is the workhorse of both the Acoustic Fluid Logger III and Acoustic Fluid Logger IV systems, delivering the compressed gas shot down the wellbore during a fluid level test and detecting the resulting echo.

Depending on well conditions, customers may choose the 1,500 psi or the 3,000 psi Pressure Pulse Gas Gun. Both gas guns have a large shot chamber, which allow them to accommodate deep or shallow wells.

Pressure Pulse Gas Gun - 1,500 psi

The most popular choice is the 1500 psi Pressure Pulse Gas Gun. Rugged and simple to use, the Pressure Pulse Gas Gun has 2" line pipe threads on its base, which allow the operator to attach the gun directly to most wellheads. The simple side-to-side shuttle valve shooting mechanism makes the compact gun manageable and easy to shoot under all well conditions. The Pressure Pulse Gas Gun arrives with all the accessories needed -- the gas gun, two pressure gauges, carrying case, 2.5 lb. CO² bottle, charge hose, repair kit, and repair tools.

The Pressure Pulse Gas Gun offers the accuracy of a precision instrument in anLiquid filled gauges for Pressure Pulse Gas Gun easy-to-understand package. An internal microphone in the gun registers the fluid level signal with the sensitivity you need for fluid level testing in a wide range of oil and gas well conditions. Two liquid-filled gauges accompany the gun -- the standard 1,500 psi gauge for the fluid level test, and the 200 psi gauge to read casing pressure before the test.  Both gauges are fitted with quick-connects - easy to change stab-in connectors.  Labels etched into the gun make operation simple. Day in and day out, fluid level after fluid level, the Pressure Pulse Gas Gun is built to last.

To shoot the standard positive pressure wave, connect the gun to the wellhead,  slide the shuttle valve toward load, charge the gun with gas (bottled carbon dioxide or nitrogen) through the stab-in fill valve. Push the shuttle valve toward Fire. It's as simple as that. The Acoustic Fluid Logger instruments then go about the business of detecting the fluid level downhole.Pressure Pulse Gas Gun 1500 & box

The standard gun operates with compressed carbon dioxide -- CO² -- which is supplied through a pressure-rated  aluminum bottle and charge hose. The bottle will hold about 200 gas shots, depending on well depth, when filled with 2.5 pounds of compressed CO² gas. For operation in extreme cold, we offer an optional nitrogen -- N² -- adapter for the charge hose. Another fluid level method possible with these gas guns is the negative pressure wave, which uses gas moving from the well into the gas gun to find the fluid level, rather than using a shot of compressed gas.

Occasionally, depending on age and situational usage, the gas gun will require cleaning and maintenance. A repair kit of o-rings and valve cores and special tools are included with the gun purchase.

How does the Pressure Pulse Gas Gun register the fluid shot? Inside the gun is a sensitive microphone, which begins registering echoes inside the wellhead from the instant the gas gun is fired. The microphone is attached to the fluid logger via a microphone cable. Once the signal reaches the fluid logger, its internal electronics take over and create the fluid level graph.

Pressure Pulse Gas Gun - 3,000 psi

The 3,000 psi Pressure Pulse Gas Gun was designed with the heavier specifications required to ensure the safety and durability necessary on higher pressure oil and gas wells. The 3,000 psi gun also has a unique high-pressure internal microphone, plus a thicker-walled compression chamber than the 1,500 psi gun, and deeper thread depth for connection to the wellhead.Pressure Pulse Gas Gun 3,000 psi complete with accessories

The 3,000 psi Pressure Pulse Gas Gun has all the easy-to-use features of the 1,500 psi gun. Quick-connects are attached to the 3,000 psi and 200 psi gauges for easy change-out during testing. The gas gun loads with compressed gas through a stab-in connection in the side of the gun. The gun fires with a load-fire shuttle mechanism.

Heavier specifications don't make the 3,000 psi gas gun a bulky piece of equipment. With working pressure up to 3,000 psi and a 2 7/8" EUE / 2 1/2" 8rd line pipe thread size, this gun is easy to transport to the well site in its own carrying case.

The threads at the base of the 3,000 psi Pressure Pulse Gas Gun allow a quick connection to the wellhead. Pipe adapters, available from Sage, can be added for connection to standard 2" line pipe. 


Compressed gas (CO²) for the bottle can be found from industrial gas suppliers. Simply look for a local oilfield, industrial, medical or beverage gas supplier. The 2.5 lb. bottle should be weighed empty, then filled with 2.5 lbs. of compressed gas.

See the Supplies tab for more microphones, replacement o-ring kits, supplies and accessories for the Pressure Pulse Gas Gun.


Click for a .pdf of Pressure Pulse Gun maintenance and operation, complete with photographs, in either of these product manuals:

Acoustic Fluid Logger III with Pressure Pulse Gun - Operator's Manual

Acoustic Fluid Logger IV with Pressure Pulse Gun - Operator's Manual

Click for a .pdf of the brochure: Pressure Pulse Gas Gun Brochure - 1,500 and 3,000 psi


Pressure Transducer

Optional with AFL IV with Dynamometer and AFL IV systems:

Pressure Transducer used with Pressure Pulse Gas Gun

The Sage Pressure Transducer records a surface pressure buildup before the shot and allows calculation of the gas afterflow. This allows the fluid level to be corrected for the amount of gas in the column, basically making two fluid level readings: the measured fluid level, and true fluid level without the gas in it.

The Sage Pressure Transducer attaches to the top of the Pressure Pulse Gas Gun at the quick connect, in place of the standard pressure gauge. Results of the scan will display on the Pressure Scan tab of the Sage AFL software, as shown below.

Pressure Scan tab - Sage AFL software

The Pressure Transducer should be matched to the psi rating on the its corresponding Pressure Pulse Gun: 1,500 psi pressure transducer for the 1,500 psi gas gun, and 3,000 psi pressure transducer for the 3,000 psi gas gun.

 For more on the Sage Pressure Transducers, see the Transducer page on the Products tab.