mud pump pulsation dampener pre-charge pressure in stock

A properly serviced pulsation dampener is critical for your mud pumps’ efficiency, safety, and performance. Unfortunately, there aren’t many resources available to educate personnel on executing safe and effective servicing procedures. Please review the following steps with your personnel for safe pulsation dampener maintenance.

Should you or your personnel have any questions regarding pulsation dampener maintenance, please don’t hesitate to ask. Sigma is more than happy to help you to ensure safe and proper care is being completed on your pulsation dampening equipment.

The pulsation dampeners shall be installed properly to reduce the pressure fluctuation and smooth the liquid flow. In order to extend the lifespan of the air bag, it is highly recommended to maintain the suggested proportion of the pump pressure to the pre-charge pressure of the air bag for the pulsation dampeners. Generally, the pump pressure shall be 2/3 that of the discharge pressure and no more than 4.5MPa.

2. During maintenance, the pump pressure and the pressure inside the pulsation dampeners shall be zero. Since the residual pressure is generally small and can not be indicated on the pressure gauge, user shall confirm the pressure carefully to avoid accident caused by low pressure.

This device is designed to reduce pulsations (pressure fluctuations) that occur with systems that have a positive displacement pump.  Rubber bladder is pre-charged with nitrogen up to 50-60% of the system pressure.  As water passes by the pulsation dampener, it absorbs the pulsations that come from the movement of water in the system.  It is designed to protect pump equipment and piping in the system and can reduce pulsations down to 4%.

Dedicated to strict quality management and thoughtful client services, our experienced staff customers are generally available to discuss your demands and guarantee full client pleasure for Mud Pump Pulsation Dampener Precharge Pressure, , , , The main goal of our company would be to live a satisfactory memory to all of the shoppers, and establish a long term company romantic relationship with customers and users all around the entire world.

Pulsation problems often start on the suction side. Pulsation or cavitation is caused by the variation of fluid movement within a contained system. Since fluid is non-compressible, the energy produced by this pulsation or cavitation must be compensated for. With the introduction of pulsation equipment into a system this energy now has a place to expend itself. Without the pulsation equipment involved in your pumping system, the pulsation or cavitation that is present can lead to the following:

This paper focuses on the operational experience that was gained during field test of the Hex Pump on a land rig in Jasper, Texas in October 2003. This field test showed that the pulsation frequency in the flow from the Hex Pump did not interfere with the MWD-measurements, providing a much cleaner signal to the directional driller. Also, the overall power consumption on the rig was reduced due to use of AC-motors.

6500 Brittmoore Houston, Texas 77041-5109 281-931-8550 888-MUD-PUMP www.lewco-equip.com FAX 713-856-5341February 24, 2003 Page 1 of 9 Table of Contents

The Model L20-7500-DNV Discharge Pulsation Dampener....................................3Assembly Drawing ........................................................................................................4Parts List ........................................................................................................................5Mounting Instructions ..................................................................................................6Precharge Pressure Levels ...........................................................................................7Overhaul Kit ..................................................................................................................8Recommended Spare Parts ..........................................................................................9

6500 Brittmoore Houston, Texas 77041-5109 281-931-8550 888-MUD-PUMP www.lewco-equip.com FAX 713-856-5341February 24, 2003 Page 2 of 9 The Model L20-7500-DNV Discharge Pulsation DampenerThe LEWCO pulsation dampener is designed to counter the effect of pulsations often associatedwith positive displacement reciprocating pumps. The L20-7500-DNV has a dampening volumeof 20 gallons and is rated for a maximum allowable working pressure of 7,500 psi. The L20’sdesign focuses on durability and simplicity. Since the L20 uses a minimum number of parts, it iscompletely field serviceable, thereby eliminating costly shop repairs and down time. Areplaceable bottom plate having a 4 1/16” API 10,000 connection comes as a standard feature,which is ideal when working with abrasive or corrosive fluids. The large top flange allows forreplacement of the diaphragm bladder without removing the unit from the line. The stainlesssteel charge valve and pressure gage are located on the top flange and protected by a heavy-dutycover that also serves as a lifting eye. Each complete unit is hydrostatically tested to 11,250 psibefore shipment. Ask for LEWCO part number C305026

6500 Brittmoore Houston, Texas 77041-5109 281-931-8550 888-MUD-PUMP www.lewco-equip.com FAX 713-856-5341February 24, 2003 Page 3 of 9 Assembly Drawing Model L20-7500-DNV Discharge Pulsation Dampener P/N C305026

6500 Brittmoore Houston, Texas 77041-5109 281-931-8550 888-MUD-PUMP www.lewco-equip.com FAX 713-856-5341February 24, 2003 Page 4 of 9

Read All Instructions Before Attempting to Install This Dampener.Use Safe Lifting Practices Whenever The Dampener Is Installed Or Moved. The Dampener Lifting Cap Is Designed To Lift The Dampener Only. The Dampener Must Be Completely Unflanged Before It Is Lifted.

The LEWCO Model L20-7500-DNV dampener should be mounted preferably in the verticalposition. When other conditions exist, an angular or inverted installation is acceptable and doesnot impede dampener performance. However, increased corrosion could occur due to trappedfluid.

LEWCO dampeners use ANSI and API flanged connections and NPT type threaded connections.For flanged connections, position the dampener on a gasket and mating flange so that it iscentered. Install nuts hand tight. Cross-tighten nuts one turn at a time to proper torque to insureuniform load. The torque value for the 1-1/8” stud is 778 ft. lbs.

6500 Brittmoore Houston, Texas 77041-5109 281-931-8550 888-MUD-PUMP www.lewco-equip.com FAX 713-856-5341February 24, 2003 Page 6 of 9 Precharge Pressure Levels Model L20-7500-DNV Discharge Pulsation Dampeners

x For maximum operating efficiency, the precharge pressure should be 75 percent of the minimum operating system pressure or 2,000 psig* , whichever is lower.

x For normal operating conditions, the precharge pressure should be 50 percent to 60 percent of the average operating system pressure or 2,000 psig*, whichever is lower.

x For limited operating conditions, the precharge pressure should be maintained between 30 percent to 75 percent of the average system operating pressure or 2,000 psig*, whichever is lower.

PRECHARGING General Precharging Directions Model L20-7500-DNV Discharge Pulsation DampenerThe charging valve and the pressure gauge are located under the dampener lifting cap, and theyare exposed by removing the lifting cap. Before precharging the dampener, make sure all coverstud nuts are tightened evenly and no pressure is on the operating system.

Connect one end of the hose assembly to a standard commercially available nitrogen bottle andthe other end to the charging valve located at the top of the dampener. Precharge from a standard224 cubic foot 2,200 psig nitrogen bottle equipped with a pressure regulator. Open the bottleregulator valve until recommended precharge pressure shows on the regulator gauge. Slowlyopen the charging valve on the dampener by turning the top hex nut 3 to 4 complete turnscounter-clockwise.

Allow pressure to increase in the dampener until dampener pressure gauge reads specifiedprecharge pressure. This process normally takes 5 to 15 minutes. Dampener gauge and regulatorgauge should read the same and be equal to the specified precharge pressure. Close theprecharge valve, then close the regulator valve at the nitrogen bottle. The sound of escaping gasmay be heard at the charging valve until the regulator is closed.

6500 Brittmoore Houston, Texas 77041-5109 281-931-8550 888-MUD-PUMP www.lewco-equip.com FAX 713-856-5341February 24, 2003 Page 7 of 9 Overhaul Kit Model L20-7500-DNV Discharge Pulsation Dampener

ITEM QTY PART NO. DESCRIPTION 2 1 EG145 Pressure Gauge 3 1 EV215 Charging Valve 7 1 002-1666 Stabilizer Plate Bolt 8 1 002-1544 Lock Washer 9 1 108-0620 Stabilizer Plate 10 1 108-0619 Stabilizer 11 1 108-0618 Diaphragm Bladder 13 8 EN137 Nut Hvy. Hex. 1-1/8”-7 15 1 108-0656 Bottom Flange Seal 17 8 ES174 Bottom Flange Stud 19 1 EO190 Charging Valve O-Ring 25 1 108-0065 Ring Gasket

6500 Brittmoore Houston, Texas 77041-5109 281-931-8550 888-MUD-PUMP www.lewco-equip.com FAX 713-856-5341February 24, 2003 Page 8 of 9 Recommended Spare Parts Model L20-7500-DNV Discharge Pulsation Dampener

Item Qty Part No. Description 2 2 EG145 Pressure Gauge 3 2 EV215 Charging Valve 4 12 ES175 Top Flange Bolt 5 12 EN132 Top Flange Nut 7 1 002-1666 Stabilizer Plate Bolt 8 1 002-1544 Lock Washer 9 1 108-0620 Stabilizer Plate 10 1 108-0619 Stabilizer 11 1 108-0618 Diaphragm Bladder 13 8 EN137 Nut Hvy Hex. 1-1/8”-7 14 8 EC181 Bottom Flange Cap Screw 15 2 108-0656 Bottom Flange Seal 16 4 002-1629 Lifting Cap Bolt 19 2 EO190 Charging Valve O-Ring 25 1 108-0065 Ring Gasket 26 1 B310066 Charging Hose Assembly

6500 Brittmoore Houston, Texas 77041-5109 281-931-8550 888-MUD-PUMP www.lewco-equip.com FAX 713-856-5341February 24, 2003 Page 9 of 9