Marginal heavy oil wells may still contain recoverable reserves, but declining production, high viscosity, sand, thermal cycling, and repeated interventions can make continued operation difficult. A successful upgrade is not simply about replacing the pump—it is about building a controlled artificial-lift solution that matches the well’s current production window.

HXBS provides integrated intelligent artificial-lift solutions for challenging heavy-oil conditions. The IntelliCPCP(®) system combines a conical all-metal PCP, rotating and lifting surface drive, wellhead protection, downhole load management, intelligent controls, and digital monitoring into one coordinated system.

Application Scenario: Marginal Heavy Oil Wells

A marginal heavy-oil well may have low or unstable liquid production while still facing demanding mechanical and fluid conditions. Typical applications include:

• Low-rate heavy-oil and ultra-heavy-oil wells

• Sand-prone or scale-prone wells

• High-temperature and thermal-recovery wells

• CSS production wells requiring injection-production transitions

• Deviated and horizontal wells with rod-tubing wear

• Late-life wells with rising workover frequency or unstable pump performance

In these applications, the objective is not to force maximum production. It is to maintain a stable, economical operating rate while reducing avoidable shutdowns, pump sticking, rod wear, and intervention requirements.

Low Flow Does Not Mean Low Risk

At low production rates, heavy oil can still create high viscous resistance and torque demand. If pump clearance becomes too large, internal slip can reduce pumping efficiency. If clearance is too tight, friction, solids, and temperature changes can increase torque and raise the risk of pump sticking.

Thermal cycling creates another challenge. During CSS and other steam-related operations, tubing and rod strings can expand and contract, changing the operating load acting on the pump. In deviated and horizontal wells, rod-string side loading can further increase rod-tubing contact and wear.

For marginal wells, these issues can interact: declining inflow may reduce stable pumping conditions, while sand, scale, thermal changes, or rod friction increase mechanical loading. This is why a pump-only replacement may not solve the root cause of declining reliability.

HXBS Solution: Adaptive Conical PCP Upgrade

The IntelliCPCP(®) intelligent conical PCP system is designed as a complete artificial-lift configuration rather than a separate downhole pump.

Its core components include:

• FERROXIS™ all-metal conical screw pump

• DynaRL™ rotating and lifting surface-drive system

• THERMOLOCK™ wellhead sealing mechanism

• Graspos™ downhole balancing component

• Synergix™ intelligent control and operator interface

• HXBS Monitor digital monitoring platform

The FERROXIS™ pump uses a conical rotor-stator structure rather than a fixed equal-diameter configuration. By adjusting the rotor’s axial position, the system can manage the radial operating clearance between the rotor and stator.

This gives operators a way to adapt the pump to changing well conditions. A tighter clearance can support volumetric efficiency, while a larger clearance can help reduce resistance when handling high-viscosity fluid, sand, scale, or changing thermal conditions. HXBS describes this capability as dynamic clearance control for maintaining pumping efficiency and supporting sand- and scale-related fault response.

Controlled Lifting and Sand Response

The DynaRL™ Drive System combines rod-string rotation with controlled lifting and lowering functions. This is important because conical PCP performance depends not only on rotation but also on accurate rotor positioning.

The system can support operating procedures for:

• Rotor-stator clearance adjustment

• Pump-efficiency management

• Sand-discharge and anti-sticking actions

• Controlled startup and restart

• Thermal-operation preparation

• Return to production after injection and cooling

For marginal heavy-oil wells, this creates an operational alternative to treating every torque increase or performance decline as an immediate workover event. Any intervention procedure should still be based on well conditions, field operating rules, and safety requirements.

Thermal Recovery Without Pulling Tubing

For thermal heavy-oil production, the IntelliCPCP(®) system supports injection-production integration. Operators can use the production string for steam injection and subsequent oil production without pulling the tubing string.

Before steam injection, the DynaRL™ system can adjust the axial rotor position to establish the required injection operating condition. After injection and cooling, the system can be returned to its production configuration through a controlled operating procedure.

This capability is relevant to CSS operations and may support late-life thermal-production strategies where wells require an additional heating cycle to improve fluid mobility near the wellbore. It can help reduce unnecessary string-handling steps between injection and production, subject to the actual completion design and field procedures.

HXBS states that IntelliCPCP(®) is designed for high-temperature operation up to 380°C and for ultra-heavy oil lifting up to 20,000 mPa·s at 50°C.

Wellhead and Downhole Protection

THERMOLOCK™ is integrated into the wellhead four-way assembly to provide controlled sealing during pumping, steam injection, and potential leakage events. This is particularly relevant in thermal applications where pressure and temperature can change during injection-production transitions.

The Graspos™ downhole balancing component helps maintain rotor-stator positioning as rod-string loads change with temperature, pressure, and operating conditions. Its RodSavior™ capability is designed to reduce rod-tubing wear, which is especially important in deviated and horizontal wells. HXBS states that Graspos™ can withstand dynamic loads up to 60 tonnes and temperatures up to 380°C.

Together, the surface drive, wellhead protection, and downhole balancing components support a more controlled load path from the polished rod to the downhole pump.

Data-Guided Operation

Low-flow heavy-oil production requires active operating control rather than a fixed-speed approach. Synergix™ controls and HXBS Monitor provide local and remote visibility into key operating parameters, including torque, speed, temperature, pressure, and pump-system status.

This information can help operators identify:

• Torque changes associated with viscosity, sand, friction, or clearance variation

• Pressure and temperature changes after injection or cooling cycles

• Potential pump-sticking conditions

• Changes in startup and shutdown behavior

• Production trends requiring speed or clearance adjustment

A gradual commissioning process should establish baseline values for speed, torque, pressure, temperature, and liquid production. Operators can then make controlled adjustments based on actual well response rather than attempting to achieve maximum speed immediately.

Upgrade Planning for Marginal Wells

A low-flow HXBS PCP installation should begin with a well-specific assessment. The final configuration should consider:

• Minimum, normal, and maximum liquid rate

• Oil viscosity at operating temperature

• Sand content, scale history, gas conditions, and fluid composition

• Well depth, deviation, tubing size, casing geometry, and rod-string condition

• Bottomhole temperature, pressure conditions, and thermal-recovery requirements

• Historical pump failures, torque events, and workover frequency

• Available power, communications, field maintenance capability, and operating procedures

HXBS can then match the all-metal conical pump, DynaRL™ drive, Graspos™ balancing component, wellhead equipment, control settings, and monitoring strategy to the well’s actual operating window.

A Controlled Path for Low-Flow Production

A marginal heavy-oil well does not necessarily need to remain a high-intervention asset. The right artificial-lift upgrade can provide a more flexible way to manage low-rate production, high viscosity, solids, thermal cycling, and mechanical loading.

The HXBS IntelliCPCP(®) system combines adjustable conical-pump clearance, rotating and lifting control, thermal wellhead protection, downhole balancing, and real-time monitoring. This integrated approach helps operators maintain a more stable production strategy while adapting to changing well conditions.

For a well-specific assessment, explore HXBS artificial lift technical services and provide the well’s production rate, viscosity, temperature, depth, deviation, sand condition, thermal plan, and historical operating data.