Above Ground

The most advance hydraulic rod pump cylinder in the industry, boasting a maximum stroke length of 336", a proven integral sealing system and sturdy construction.
Features & Benefits
HRP International's Above Ground Hydraulic Cylinder boost the longest stroke length in the industry at up to 336 inches. The cylinder's advance sealing technology is also a world's first, installing directly above the pumping tee and eliminating the need for a stuffing box. 

The Hydraulic Cylinder's construction is sturdy and light and don't require a pedestal on the well head for installation. Guide wires are not required to stabilise the cylinder. We use an optional tripod stabilizer to limit sway / harmonics. 

The Hydraulic Cylinder also withstands high winds up to 60 knots and are installed in areas that experience cyclones and hurricanes. It is compatible for harsh produced fluids (acid, steam, condensate) and requires no special well head or adapters.

HRP Hydraulic Cylinder

Hydraulic Cylinder

HRP's above ground cylnder comes in a wide range of stroke lengths from 60 inches up to 336 incles. A piston connecting to the integrated polisheed rod is moved upwards (upstroke) by filling the cylinder with hydraulic oil. On the downstroke, the hydraulic oil is released from the cylinder and the weight of the rod string pulls the piston downwards. 

Hydraulic Fluid Intake

This is where the hydraulic hose is connected to move fluid in and out of the cylinder. Only the highest quality and most advance hydrualic fittings are used (similar to those found in the landing mechanism of planes and high performance hydraulic components). 

Integrated Sealing System

HRP's above ground cylnder features a state-of-the -art integral sealing system that eliminates the need for a stuffing box. The proprietary and field proven design seals off the hydraulic cylinder from the wellbore fluid and vice versa. 

Wellhead Adapter

The wellhead adapter connects the hydraulic cylinder to the customer's wellhead and comes in many different configurations including API flanges , EUE 8RD connections and hammer unions. All of our cylinder comes preinstalled with the wellhead adapters ready to be attached to the existing wellhead connections.  

Integrated Polished Rod

The HRP cylinder comes with an integrated polished rod that is connected to the piston within the cylinder for ease of connection to the sucker rod string.

Features & Benefits

Long & slow is the way to go

The long stroking cylinder allows rods to travel at lower speeds, reduced rod string fatigue while its near-fixed traveling speeds resulting in lower rod string compression.


The reduced SPM also reduces traveling/standing valve wear and enables longer tubing life due to longer coupling-to-tubing wear patterns.


The long stroke also provide higher compression ratios, which helps reduce gas locking as well as better mechanical efficiency (stroke vs. stretch ratio).


Ability to lift larger pump plungers = higher volume rate capacities.

No more stuffing box leaks

The HRP cylinder negates the need for a stuffing box and thus eliminate stuffing box leaks typically associated with wear & tear of stuffing box rubbers, or damaged polished rods. 


The cylinder has an tried and proven integrated sealing system "stuffing box" that attaches to the bottom of the cylinder, which seats above the flow tee/composite rod lock. 


A secondary stuffinx box can be optioned for very dirty fluids and heavy crude. The secondary stuffing box isolate contanimation away from the cylinder and "wipe" the polished rod clean before it enters the cylinder's integral seals. 

No Pedestal, Support or Wiring needed

Installs in less time than a walking beam horsehead, bridle and carrier bar. 


Unlike most hydraulic cylinders in the market, the HRP hydraulic cylinder requires no pedestal or guide wire supports. 


There are also no sensors or electrical devide needed on the cylinder for position and load calculations, which is done through the sensors on the power unit. 


This ensures the cylinder is safe on gas wells and hazardous environment.

Lower cost for the higer production

The HRP long stroke hydraulic cylinders means you don't have to spend big on comparable stroke units such as a Rotaflex or a large conventional unit. 


The cylinder itself cost less than comparable cylinders in the market and is cheaper to maintainn and service. 


The cylinder also allows the installation of tubing rotators as the rods spin freely in the tubing, reducing tubing & rod wear.

Specifications

We have a wide range of cylinder sizes & stroke lengths to cater for most applications.

Stroke Length 

36, 60, 86, 120, 240, 336 (inches)

Cylinder Sizes

2.5, 3.0, 3.5, 4.0, 4.5. 5.0 (inches)

Peak Polished Rod Load (PPRL)

up to 53,376 lbs

Design Pressure & Temperature

design pressure 5000 psi
design temperature 150 deg C

Cylinder Sizes & PPRL Ratings

Cylinder Size (Bore x Stroke) Max PPRL (@ 3000 psig) Extended Length Collapsed Length
2.5" x 240" 12,363 527" (44') 287" (24')
3.0" x 240" 18,840 527" (44') 287" (24')
3.5" x 240" 25,169 527" (44') 287" (24')
3.5" x 288" 25,169 623" (52') 335" (28')
3.5" x 366" 25,169 719" (60') 383" (32')
4.0" x 240" 34,000 527" (44') 287" (24')
4.0" x 288" 34,000 623" (52') 335" (28')
4.0" x 336" 34,000 719" (60') 383" (32')
4.5" x 240" 42,390 527" (44') 287" (24')
4.5" x 228" 42,390 623" (52') 335" (28')
4.5" x 336" 42,390 719" (60') 383" (32')
5.0" x 336" 53,376 719" (60') 383" (32')