Hydraulic Cylinder

Sub Surface Hydraulic Cylinders
These cylinders are limited by the well's existing casing size at surface, and they do require special wellhead adapters. Please see this document for dimensional specs.
Up to 42,390 pounds of Peak Polished Rod Load capacity
Up to 336" stroke lengths
No Stuffing Box! (No more leaks=lower maintenance costs)
Lightweight (weighs less than 2,500 lbs)
Installs in less time than a walking beam horsehead, bridle and carrier bar
Compatible for harsh produced fluids (acid, condensate)
Tubing rotators are available through our strategic partners (call for more info).
Above Ground Hydraulic Cylinders
There are circumstances that require the use of a tripod stabilizer to prevent the cylinder from swaying under normal operation. These circumstances include:
When stroke lengths exceed 240 inches.
When harmonics are present due to higher stroke per minute speeds.
In areas where high winds are present or expected.
Up to 53,576 pounds of Peak Polished Rod Load capacity
Up to 336" stroke lengths
No Stuffing Box! (No more leaks, lower maintenance costs)
Lightweight (weighs less than 1800 lbs)
Installs in less time than a walking beam horsehead, bridle and carrier bar
Compatible for harsh produced fluids (acid, steam, condensate)
Requires no special well head or adapters
Hydraulic Power Unit

480/460 VAC three-phase electrical power
NEMA B electric motor: 10 to 250 HP, T-Frame, C-Face,1800 RPM, 1.15 service factor, class F insulation, UL listed & CSA certified.
NEMA 4 electrical ratings on all enclosures & devices (liquid-tight). Optional Class I, Div II, Group C&D explosion-proof ratings are available. All devices and enclosures carry UL and/or or CSA listings.
IEC-style combination motor starters (pump & cooling fan)
Thermal-magnetic motor overload protection (pump & cooling fan)
MCP-Type breaker / disconnect motor protection
115/120 VAC single-phase control power transformer
GE FANUC PLC (90-30 Series Programmable Logic Controller)
Circuit breaker and/or thermal fuse protection on all control devices and loads
3000 psig continuous (3500 intermittent) hydraulic vane pump pressure rating
5000 psig valve component ratings
5 to 108 GPM pump displacement
Continuous automatic cooling system control (adjustable set points)
Continuous return filtration (25 micron cellulose media)
Continuous pump strainer filtration
Manually adjustable pressure relief valve
Manually adjustable dual downstroke speed / flow controls
Manually adjustable dual soft shift (shifting time/speed)
Pilot operated 3-position, 4-way directional valve
Digital Telemetry
Continuous oil pressure monitoring for alarms and shut down
Continuous oil level and temperature monitoring for alarms and shutdown
Polished Rod Dynamometer (via hydraulic pressure)
RS-232 (DB-9) serial port connection for remote and local software control
Telemetry-ready (compatible with terrestrial land line, cellular, spread spectrum radios and satellite cellular).
Windows compatible control software
Web-based Data Collection and Analysis (
Monitoring & Diagnostics

Digital Monitoring & Diagnostics
HRPI equipment provides advanced computer control, monitoring, and diagnostics. The most notable control feature of the system is the ability to remotely adjust the well's Strokes Per Minute (SPM). This allows for a more optimized pump rate given changing conditions. Live dyno graphs are streamed as they are collected, stored both locally and on a central web based analysis server.
Web based monitoring, alerting, and analysis is provided through Access to historical well information, current operating parameters, dynos, and trend graphs are available securely from any standard web browser.
A full informational brochure can be found here.
WHAT IS PUMPREPORTS.COM? is a web-based data collection/analysis tool for Operators, Engineers, and Service Providers. Information is gathered from multiple sources and presented in a unified and intuitive interface. People responsible for the operation and maintenance of wells and equipment can collaborate remotely, reducing meeting costs and improving production.
Fluid levels, production tests, workover history, chemical analysis, rod/tubing diagnostics, surface equipment data, historical comments, and more are all available to the user.
The web-based interface is ideal for distributing important information to key personnel involved in the design, operation, or maintenance of wells and equipment. Used in conjunction with teleconferences, Operators, Engineers, and Service Providers can collectively troubleshoot or review wells. In addition, well-specific comments are stored on the website to aid in future troubleshooting.
User-level access control allows Service Providers, Operators, and Engineers to securely access the same data. User access to specific data or advanced features can be specified. For example, an engineer can have access to multiple locations, while an operator would only need access to their specific location.
Artificial Lift Comparison

HRP vs. Traditional Beam Units
Traditional beam units are the most utilized and durable artificial lift method. HRP technology merges the traditional benefits of a rod pump with new technologies to address the flaws in traditional beam unit rod pumps.
No Rod String Compression
HRP units never induce a downward force on the polished rod
Near Linear Polished Rod Velocity
Lower Peak Polished Rod Load results from eliminating rod string acceleration / deceleration
Increased pump efficiency
Long Stroke
Reduced wear
Less pump cycling
Increased pump efficiency
Deviated Wells
Low Profile
Easy Workover
Dense Well Spacing
Below-grade installation
Remote Optimization & Monitoring
HRP vs. Progressive Cavity Pumps (PCP)
In wells less that 5000 feet, Progressive Cavity Pumps (PCP's) are generally considered an attractive solution because of high electrical efficiencies and low capital costs. PCP's are not cost effective under certain well conditions such as heat, chemicals, sand/solids, and high Gas to Oil Ratios (GOR). Rod pumps are relatively unaffected by all of these adverse conditions.
We have had great success replacing PCP's with HRP's in a number of wells in the Los Angeles Basin.
HRP vs. Gas Lift
Gas lift is a process of compressing and injecting gas into a well's production casing to draw fluid up the tubing to the surface. This method is generally used on wells that have associated gas production or when high pressure and volumes of gas is available from other nearby wells for injection. As the gas pressures diminish over time in mature fields, gas lift becomes less efficient. As the gas reserve is depleted the operator begins to look for alternative lift methods. The HRPI ultra long stroke system represents an ideal alternative because the high compression ratio of the bottom hole pump, which reduces the potential of gas locking (forcing the pump to stop pumping). With the eventual depletion of the 19,000 wells currently on a gas lift system, many will be candidates for HRPI's technology. As an example, approximately half of the HRPI units sold replaced gas lift systems.
HRP vs. RotaFlex®
The RotaFlex® is a 100% mechanical long-stroke slow stroke surface drive pumping unit used to lift crude oil from deep or high volume wells. The patented design is 20%-30% more electrically efficient than the conventional beam pumping unit. The unit provides a 306-inch pump stroke and has a fixed traveling speed that can result in longer run life of the down strokes equipment. The reversing mechanism is completely mechanical and creates a 306-inch pump stroke.
The principal application for the RotaFlex® product is oil wells that are 8,000-10,000 feet in depth where the unit can pump 300-800 BPD at up to 4.5 strokes per minute versus 10-12 strokes per minute required in a conventional rod pump unit. The slow speed significantly reduces tubing and rod wear and improves electrical efficiency. The other application for the RotaFlex® unit is in wells that require larger pumping volumes than conventional beam units are capable of producing.
HRP units are applicable on nearly all wells where RotaFlex® units are appropriate. HRP units provide the added benefit of a low profile wellhead. During workover, both Above Ground and Subsurface Hydraulic Cylinders are easily and safely removed, whereas a RotaFlex® unit moves, but remains largely in place.
HRP Applications

Specific Applications
HRP units are applicable on nearly all rod pump wells. In addition, we have had great success replacing other lift methods such as Progressive Cavity Pumps (PCP's), Gas Lift, and others.
HRP units are particularly suited for high density drill sites such as:
Offshore shallow water platforms
Urban drill sites
Directional drill sites
High density traditional fields
Our low profile subsurface cylinders are ideal for:
Residential & Commercial Locations
Agricultural Installations
Visually sensitive areas such as wild life habitats
Our Long Stroke and high lifting capacity are ideal for any rod pump well where a RotaFlex® would be considered.
De-watering of gas wells. We have installed a number of HRP units at the Southern California Gas Company's Montebello Gas Storage Facility.