Heavy oil production in unconsolidated reservoirs is often constrained by sand: traditional "zero‑sand" thinking treats sand as a risk to eliminate, driving complex completions, high costs, and limited recovery. CHOPS (Cold Heavy Oil Production with Sand) is a heavy oil recovery technology that deliberately uses controlled sand production to open flow channels, and HXBS all‑metal conical PCP equipment and systems are designed to support the pump‑side requirements of this technology in sand‑bearing cold heavy oil production.

Operators planning CHOPS or other heavy oil recovery technology options for unconsolidated reservoirs can explore HXBS's artificial lift solutions and case studies via HXBS all‑metal PCP and IntelliCPCP® solutions.

Traditional zero-sand approaches

In many heavy oil fields, the reservoir consists of loosely consolidated sandstones, and sand production during cold primary production is common. Traditional heavy oil recovery technology in these reservoirs often aims for "zero‑sand" production by installing elaborate sand‑control completions—gravel packs, screens, or tight perforation strategies—and using conservative drawdown.

This zero‑sand approach leads to several challenges in unconsolidated heavy oil reservoirs:

• Restricted inflow and low productivity: tight sand‑control barriers limit communication between the wellbore and the reservoir, so viscous heavy oil cannot flow freely.

• High completion and workover costs: complex sand‑control hardware can plug or fail, requiring frequent interventions and expensive workovers.

• Long‑term formation damage: fines migration and near‑wellbore plugging reduce permeability around the wellbore, lowering recovery factor over time.

As reservoir pressure declines, sand problems often worsen, yet existing sand‑control–based heavy oil recovery technology still struggles to deliver both stable production and acceptable economics in loose formations.

How CHOPS solves sand problems

CHOPS is a non‑thermal primary heavy oil recovery technology in which controlled sand production is intentionally allowed as part of reservoir development. Instead of forcing sand to stay in the formation, CHOPS maintains a moderate, persistent sand influx so that sand and crude flow together into the wellbore.

In unconsolidated heavy oil reservoirs, this heavy oil recovery technology provides several key benefits:

• Improved near‑wellbore permeability: sand production creates wormholes and scoured regions around the wellbore, forming a high‑permeability zone that enhances heavy oil inflow.

• Higher drawdown and sustained production: with better permeability, operators can increase drawdown to pull more heavy oil without immediately damaging the reservoir.

• Less dependence on complex sand‑control completions: reservoir‑side flow improvement reduces the need for extremely tight sand‑control hardware and can simplify completion design.

By treating sand as part of the heavy oil recovery technology rather than a purely negative factor, CHOPS makes it possible to develop unconsolidated and thin heavy oil reservoirs that are difficult to produce efficiently with a zero‑sand mindset. But once CHOPS is adopted at the reservoir level, the artificial lift strategy must be able to live with sand‑bearing, cold heavy oil every day.

How HXBS supports the lift‑side application of CHOPS in unconsolidated heavy oil reservoirs

Once operators decide to apply CHOPS in unconsolidated heavy oil reservoirs, they need equipment and systems that support the artificial‑lift requirements of this heavy oil recovery technology under field conditions. Cold heavy oil with sand becomes the normal production stream, and the pump must handle this mixture without excessive sticking, wear, or workover frequency.

HXBS support the artificial‑lift requirements of this heavy oil recovery technology under field conditions. by integrating all‑metal conical progressive cavity pump equipment with a complete artificial lift system designed specifically for cold heavy oil with sand. At the core is the FERROXIS® all‑metal conical PCP, which provides the downhole pump architecture for lifting sand‑bearing heavy oil, while the IntelliCPCP® system and its subsystems manage torque, rotor‑stator clearance, wear, and real‑time monitoring so that this heavy oil recovery technology can be supported more safely and economically within defined operating limits.

In practical terms, HXBS supports CHOPS through three main actions:

Sand‑tolerant all‑metal conical PCP downhole

The FERROXIS® conical rotor‑stator pair uses hardened metal surfaces and tapered geometry to pass sand‑bearing cold heavy oil within defined limits, helping reduce exposure to some failure modes associated with elastomer stators in abrasive service. Special metallurgy and surface hardening slow clearance growth and help maintain volumetric performance under abrasive flow conditions typical of CHOPS.

Surface and mechanical subsystems tuned to CHOPS

DynaRL® surface drives, THERMOLOCK® wellhead sealing, DynaRL® surface drives, THERMOLOCK® wellhead sealing, RodSavior® and Graspos® mechanical tools, plus Synergix® intelligent control, are configured to manage start‑ups, sand surges, foamy flow, and rate changes that naturally arise when CHOPS is applied. These subsystems coordinate torque, speed and mechanical protection. To support more stable pump and rod‑string operation in sand‑bearing cold production.

Dynamic clearance and digital optimization

The lifting assembly and control logic can adjust stator‑rotor clearance and pump speed from the surface as wormholes evolve, sand rates shift, and near‑wellbore permeability changes. By tightening clearance when efficiency is critical and opening it temporarily to let sand or scale pass, IntelliCPCP® helps the pump adapt to the evolving CHOPS regimen rather than relying only on a fixed design clearance.

When CHOPS is paired with this integrated all‑metal PCP system, HXBS helps translate the reservoir‑side decision ("allow sand to flow") into a more controllable lifting strategy built around sand‑bearing cold heavy oil. For technical details on IntelliCPCP® and its subsystems, see the product page: IntelliCPCP® All-Metal Conical Progressive Cavity Pump System.

From zero-sand problems to CHOPS plus HXBS

HXBS case studies illustrate a common trajectory in unconsolidated heavy oil blocks:

• Stage 1 – Strict sand control: operators start with conventional sand‑control cold production using complex completions and conservative drawdown, but the wells suffer frequent plugging, low productivity, and high workover costs.

• Stage 2 – Adoption of CHOPS: after re‑evaluating the reservoir, the operator implements CHOPS, optimizing perforation strategy and allowing controlled sand influx to create wormholes and scoured regions, improving near‑wellbore permeability.

• Stage 3 – Upgrade to HXBS all‑metal conical PCP systems: as CHOPS defines the reservoir strategy, the operator aligns artificial lift by deploying IntelliCPCP® with FERROXIS®, DynaRL®, and Synergix® to support long‑cycle lifting of cold heavy oil with sand.

In these projects, CHOPS addresses the reservoir‑side challenge—improving permeability and making unconsolidated heavy oil producible—while HXBS addresses the lift‑side challenge—helping pumps operate within sand‑bearing cold production conditions, with the objective of reducing unnecessary workovers and improving lifecycle cost predictability.

CHOPS operational needs vs HXBS all‑metal conical PCP capabilities

This table highlights how HXBS all‑metal conical PCP capabilities can support, rather than independently guarantee, the operational demands that arise once CHOPS is chosen as the heavy oil recovery technology in unconsolidated reservoirs

FAQs: practical user concerns about CHOPS and HXBS equipment

Q1: How do I decide whether to keep investing in sand-control completions or move to CHOPS plus HXBS all‑metal PCP in a loose heavy oil reservoir?

Operators usually consider CHOPS with all‑metal PCP when existing sand‑control strategies lead to chronic plugging, high workover costs, and low recovery in unconsolidated or thin heavy oil reservoirs. HXBS can support an engineering and economic comparison using available field data, including production potential, MTBF assumptions, and intervention cost estimates, against continued sand‑control investment.

Q2: What specific well data should I prepare before selecting an HXBS all‑metal conical PCP configuration for CHOPS?

For CHOPS projects, HXBS typically asks for particle size distribution, sand hardness and angularity, expected sand‑cut, fluid viscosity, completion geometry, and planned drawdown profile. These inputs are used to define the solids envelope, choose an appropriate FERROXIS® pump series, and set clearance adjustment ranges and drive settings tailored to the planned CHOPS operating window

Q3: How will HXBS equipment respond when sand rates spike or wormholes evolve during CHOPS without immediately pulling the pump?

In CHOPS operations, IntelliCPCP® can temporarily increase rotor‑stator clearance and adjust speed to let accumulated sand pass and reduce torque peaks, then tighten clearance again once conditions stabilize. Synergix® digital control uses torque, efficiency, and event histories to guide these responses, which may reduce the need for immediate workovers under suitable operating conditions.

Q4: What are the main limitations of HXBS all‑metal PCP under CHOPS, and how can I avoid operating beyond those limits?

All‑metal PCP systems still have boundaries: extremely large or very hard particles, severe scale, or major mechanical damage can exceed clearance adjustment and wear‑resistance capabilities. HXBS manages these limits by defining acceptable solids envelopes in advance, matching pump design to field sand data, and combining mechanical practices (for example, de‑sanding facilities and staged workovers) with CHOPS to keep operation inside safe zones.

Q5: How can digital monitoring and optimization improve the long-term economics of CHOPS with HXBS equipment?

Digital tools like Synergix® and HXBS Monitor provide real‑time visibility into torque trends, efficiency, sand‑related events, and pump health. With this data, operators can optimize speed profiles, schedule targeted interventions, and fine‑tune clearance management, supporting efforts to reduce unplanned downtime and improve CHOPS economics over the production lifecycle.

Conclusion: turning sand from liability to managed asset

In unconsolidated heavy oil reservoirs, sand has long been treated as a liability that must be controlled at all costs, often leading to complex completions and weak economics. CHOPS transforms sand into a managed asset by using controlled sand production to open flow channels, while HXBS all‑metal conical PCP equipment and integrated systems are intended to provide a lifting foundation for sand‑bearing cold heavy oil under properly defined operating conditions.

If you are evaluating CHOPS or other heavy oil recovery technology for loose or thin heavy oil assets and want to see how an integrated all‑metal conical PCP system can support this method, you can review the full IntelliCPCP® system description here: IntelliCPCP® All-Metal Conical Progressive Cavity Pump System.