PLUNGER LIFT SYSTEM - National Oilwell Varco

PLUNGER LIFT SYSTEM
Efficiency and Reliability

PLUNGER LIFT SYSTEMS
One Company, Unlimited Solutions
Since 1841, National Oilwell Varco® has been dedicated to ensuring customers receive the highest quality oilfield
products and services. National Oilwell Varco is a worldwide leader in the design, manufacture and sale of equipment
and components used in oil and gas drilling and production operations, the provision of oilfield services, and supply
chain integration services to the upstream oil and gas industry. NOV® also provides supply chain services through its
network of more than 200 distribution service centers located near major drilling and production activity worldwide.
We continue to build upon our unlimited, customer-focused solutions and are proud to deliver our Artificial Lift Systems
through the NOV Monoflo division.
NOV Monoflo
Artificial Lift Systems
Coverage
The NOV Monoflo division is a true partner and worldwide source for complete Artificial Lift equipment and packaged
solutions. Our Artificial Lift professionals collaborate with you to properly evaluate well conditions and provide customized
artificial lift solutions that will optimize your production.
• Professional Well Evaluation
• Surface and Subsurface Equipment
• Controllers and Production Automation
• All Production Accessories and Expendables
• Global Supply Chain and Service Solutions
LLOYDMINSTER, CANADA HOUSTON, TEXAS

Plunger Lift Systems
Plunger Lift Technology is a cost effective and efficient technique that optimizes oil and gas production in wells
which have nominal flow trends.
As slugs of fluid travel to the surface, as much as 75% of the fluid may fall back and continue to accumulate downhole.
More accumulation equals slower production. The accumulation of fluid is known as “liquid loading” and can be
detrimental to well production. Without assistance, the column of fluid will grow too heavy to pass through and the
well stops producing.
A Plunger Lift System is an ideal solution for these well conditions. It uses an interface seal between the accumulated
fluid and the stored gas in the annulus. The well is shut-in to allow the plunger to travel to the bottom which creates
a bottomhole seal and well pressure to build. After a period of shut-in time, the head gas is blown down creating
differential pressure across the plunger which brings the plunger to surface. As the plunger travels up the tubing, it
lifts the fluid column to the surface and a turbulent seal is formed which practically eliminates liquid fall back. The
fluid column is lifted up and out allowing the well to produce again.
The system is comprised of a well specific plunger, a bottom hole bumper spring, a specialized lubricator and
catcher assembly, an electronic controller, motor valve and an arrival sensor. With the Plunger Lift System advanced
controls and wide variety of optimization solutions, NOV Monoflo is able to offer a cost effective solution and
environmentally friendly method of artificial lift.
The NOV Monoflo Plunger Lift System is the most economical and environmentally friendly form of artificial lift
technology on the market today.
Applications
The NOV Monoflo Plunger Lift System is the ideal solution for a wide range of applications and conditions including:
• Dewatering liquid loading gas wells
• Wells with high gas-to-oil ratio
• Wells that are currently being soaped
• Paraffin and hydrate control
www.nov.com/ArtificialLift
MonofloALS@nov.com

PLUNGER LIFT SYSTEM
Plungers
NOV Monoflo plungers are available in a variety of designs and models, manufactured with the objective of
improving production rates and operating in various well conditions.
Overview
Features and
Benefits
Sweet Service
Sour Service
Solid Plunger Pad Plunger Brush Plunger
Our solid plungers are
low maintenance and
are ideal for wells that
require paraffin and
scale control.
• The raised shoulder
design on the fish
neck gives additional
durability and energy
displacement
• Built in wear grooves
for easy service
• Can be easily modified
for a variety of tubing
conditions
• Designed to create
superior turbulent seal
to reduce liquid fall
back
Our pad plungers utilize
a unique pad design to
provide superior seal
efficiency and rugged
durability for clean well
bore fluid conditions.
• The raised shoulder
design on the fish
neck gives additional
durability and energy
displacement
• Available in Dual and
Single pad designs
• Interlocking pad
design provides
superior gas and fluid
seal
• Built rugged utilizing
a dual support rail
design
• Simple design using
minimal parts ruggedly
built
• AISI 4140 Alloy Steel • AISI 4140 Alloy Steel
• 17-4PH Stainless Steel
Pads
• 17-4PH Stainless Steel • 17-4PH Stainless Steel
Mandrel and End Cap
• 17-4PH Stainless Steel
Pads
• Inconel X750 springs
• AISI 304 Stainless Steel
Sleeves
Our brush plungers are
designed for maximum
sealing efficiency
while cycling in sandy
conditions.
• The raised shoulder
design on the fish
neck gives additional
durability and energy
displacement
• Excellent sealing
efficiency
• Ideal for use in
wells that require
sand removal both
produced and Frac
• Durable 6.6 Nylon
Brush design for harsh
conditions
• Designed with a
replaceable brush for
superior economics
• AISI 4140 Alloy Steel
Mandrel and End Cap
• AISI 304 Stainless Steel
Brush Carrier
• 6.6 Nylon Brush
• 17-4PH Stainless Steel
Mandrel and End Cap
• AISI 304 Stainless Steel
Brush Carrier
• 6.6 Nylon Brush

Bottom Hole Bumper Springs
NOV Monoflo bottomhole bumper spring
assemblies are designed to absorb the impact of
the plunger when it reaches the bottom of the well.
Various seating assemblies can be used (e.g.: hold
down, seal stop, tubing stop, collar stop) depending
on the application. We offer bumper springs in
various sizes and materials suitable for use in sweet
and sour service environments. All of our bumper
springs are designed for maximum flow area without
compromising strength. A ball and seat can also be
used to retain liquids in the tubing string.
• Easy to set and retrieve
• Large flow area
• The raised shoulder design on the fish
neck gives additional durability and energy
displacement
• Stainless steel material
• Spring material available in Inconel X750, and
MP35
Lubricators
NOV Monoflo lubricators are spring-loaded receivers
designed to cushion the arrival of the plunger at the
surface. The lubricator has a catcher designed to catch
the plunger upon arrival which will allow the operator
to retrieve and inspect the plunger. Available in a
variety of sizes and in special materials built rugged for
the harshest environments.
• Built to API 6A specifications
• Field serviceable
• Suitable for high pressure applications
• Sweet and Sour service available
• Cold temperature material good to -50°C
• Threaded and Flanged available
• Single and Dual Port available
• Threaded and Bowen Union available
• Extensive testing, pressure, hydro, and X-ray
• Complete and comprehensive quality and Control
packages
www.nov.com/ArtificialLift
MonofloALS@nov.com

Corporate Headquarters
7909 Parkwood Circle Drive
Houston, Texas 77036
United States
Phone: 713 375 3700
Fax: 713 346 7687
Sales
8708 West Little York Road
Suite 100
Houston, Texas 77040
United States
Phone: 281 854 0300
Fax: 281 854 0301
National Oilwell Varco has produced this brochure for general information only, and it is not
intended for design purposes. Although every effort has been made to maintain the accuracy and
reliability of its contents, National Oilwell Varco in no way assumes responsibility for liability for
any loss, damage or injury resulting from the use of information and data herein. All applications
for the material described are at the user’s risk and are the user’s responsibility.
All brands listed are trademarks of National Oilwell Varco.
One Company . . . Unlimited Solutions
Downhole Solutions
Drilling Solutions
Engineering and Project Management Solutions
Lifting and Handling Solutions
Production Solutions
Supply Chain Solutions
Tubular and Corrosion Control Solutions
Well Service and Completion Solutions
MonofloALS@nov.com www.nov.com/ArtificialLift
© 2011 National Oilwell Varco
D392002611-MKT-001 Rev. 03