Products

Progressive Cavity Pumps

Reliable, high-efficiency lift for heavy oil, high water-cut, and deviated wells — with a full catalogue of series, elastomers, and rotor configurations.

Engineered for heavy oil, high water-cut, and deviated wells.

Progressive cavity pumps deliver pulsation-free flow with minimal shear — making them the best choice for high-viscosity fluids, high gas-oil ratios, and wells that conventional rod pumps struggle with. The ELSI PCP catalogue spans 8 series, 50+ models, and three nitrile elastomer formulations, giving you a precise match for your well conditions.

Need help picking a model? Jump to the catalogue or use the pump selector.

At a glance

Series

50+

Models

55–75%

Efficiency

Heavy oilHigh water-cutDeviated / horizontal

When PCP fits

Strengths and honest limitations.

PCPs excel in specific conditions. The right engineering starts with knowing where they shine — and where another lift method fits better.

Strengths

Where PCP wins

Simple, reliable design
No valves to plug, no internal moving components — handles significant solids concentrations without clogging.
Tough fluid conditions
Best-in-class for high-viscosity fluids (heavy oil) and high water-cut production.
Proven gas handling
Efficiently handles high GOR values, eliminating the risk of gas locking.
Low shear rate
Continuous, pulsation-free flow minimizes agitation — less fluid emulsification and no heavy-oil foaming.
Setting versatility
Vertical, slightly deviated, highly deviated, horizontal, and directional wells.
Small surface footprint
Compact, easy-to-install surface drive — ideal for restricted or environmentally sensitive areas.
High efficiency
Typical overall efficiency of 55–75%, cutting energy consumption and reducing opex.

Limitations

When to look elsewhere

Downhole temperature limits
Elastomeric PCPs are limited by elastomer and bonding-agent thermal thresholds (up to 100°C for high-nitrile).
High-gas applications
Gas fractions occupy cavity volume — must be compensated with higher rotational speeds.
Capacity vs. depth
PC pump capacity varies inversely with depth — not a fit for deep, high-rate production.

Outside these conditions, see rod lift or extended lift.

Pump Architecture

Four components, eight series.

Every PCP is assembled from four core components. Series, elastomer, rotor length, and tag-bar configuration let us tune the pump to the exact well.

Stator

8 series · based on OD/ID of the metallic tube

Designed in series to match tubing and well casing requirements. Connection options range from NU Pin and EUE Box to welded adaptors, giving a fit for almost any tubing string.

2-3/83-1/83-1/23-3/44-1/84-3/455 (LG)

Elastomer

SN · MN · HN · matched to fluid chemistry

Three nitrile formulations (Soft, Medium, High) balance hardness, temperature tolerance, and oil/water/chemistry resistance. Pick the elastomer that matches your produced fluid.

Soft Nitrile (SN)Medium Nitrile (MN)High Nitrile (HN)

Rotor

Series-matched geometry · custom lengths

Designed to match the stator geometry of each series. Available in Standard, Long (extended), or Paddled configurations, with optional double-coated (chromed) surfaces for enhanced wear resistance.

Standard (S)Long / extended (L)Paddled (P)Chromed option

Tag-bar

Solid or slotted · direct-thread or welded

The bottom anchoring/stop component. Available in solid or slotted type, standard or extended length for long or paddled rotors, and with different stopping devices (bar or plate).

Solid / slottedStandard / extendedThread / weldedBar / plate stop

Elastomer Characteristics

Three formulations — match the fluid.

Most PCP elastomers are nitrile (NBR). The right formulation depends on produced fluid chemistry, temperature, and solids loading. All ELSI NBR elastomers are sulfur-cured — which means prolonged H₂S exposure above stated limits will cause post-vulcanization hardening.

Soft Medium Nitrile

Hardness: 55–60 Shore A
Max temp: 60°C / 140°F max
Fluid: ≤ 15 API

Low-hardness medium-nitrile with excellent tear and elongation. Resilient under abrasives — handles large solids with minimal damage. Higher rotor-fit interference preserves volumetric efficiency even after significant stator wear.

Best for: Abrasive heavy-oil applications with large solids

Medium Nitrile

Hardness: 65–70 Shore A
Max temp: 80°C / 176°F max
Fluid: 20–25 API

General-purpose, abrasive-resistant medium nitrile with excellent mechanical properties. Very good water resistance, handles moderate aromatic content in the produced fluid.

Best for: Workhorse elastomer for most PCP deployments

High Nitrile

Hardness: 70–75 Shore A
Max temp: 100°C / 212°F max
Fluid: 35–40 API

Augmented high-nitrile with significant enhancements to mechanical properties, oil and chemical resistance. Best combination of oil + water resistance. Superior stator-tube bonding even after high-temperature and aggressive fluid exposure.

Best for: High-temp, aggressive-chemistry, lighter-oil wells

Under the hood

Total torque = hydraulic + friction + resistive.

Pump test reports (PTR) capture volumetric efficiency vs. differential pressure. Understanding the three torque components is what lets engineers optimize the system — not just the pump.

Hydraulic Torque

∝ displacement × ΔP

Torque required to overcome hydraulic load and lift fluid. Proportional to pump displacement and differential pressure; independent of rotational speed.

Friction Torque

Rotor ↔ Stator friction

Torque required to overcome mechanical friction between rotor and stator — driven by interference fit and elastomer hardness.

Resistive Torque

∝ viscosity × RPM × rod length

Torque generated in the rotating rod string by friction against lifted fluid. Proportional to fluid viscosity, rotational speed, rod diameter, and string length.

PCP Catalogue

Full series & model reference.

Click any series to expand models, nominal capacity, rotor options, and elastomer availability. Full technical specs (connections, drift diameters, tubing requirements) available on request.

Open full catalogue

2.38"

2-3/8 Series

3 models · Stator OD 2.38" (60.3 mm) · Lifts 900–2,400 m (3,000–7,900 ft)

Slim-hole applications with small tubing.

Series-wide technical specs

Standard Stator Connection: 2-3/8 NUE PIN × 2-3/8 NUE PIN; OD 2.88" (73.0 mm)
Standard Rotor Connection: 3/4" (19.1) API PIN
Min. Tubing for Rotor: 2-3/8 EUE (drift + orbit)
Min. Tubing for 3/4" Coil: 2-7/8 EUE (73.0 EUE)
Lift Range: 900–2,400 m (3,000–7,900 ft)

Model	m³/day (100 rpm)	bbl/day (100 rpm)	CSA (in² / mm²)	Rotor	Elastomer
2 XS	2	13	0.42 / 271	S, L, P	MN, HN
4 XS	4	25	0.42 / 271	S, L, P	MN, HN
7 XS	7	44	0.46 / 297	S, L, P	MN, HN

CSA = Cavity Inflow Cross-Sectional Area. Full specs including rotor drift diameters available on request.

3.13"

3-1/8 Series

3 models · Stator OD 3.13" (79.4 mm) · Lifts 1,200–3,600 m (3,900–11,800 ft)

Standard slim-tubing series with versatile connections.

Series-wide technical specs

Standard Stator Connection: 2-7/8 EUE PIN × 2-7/8 EUE PIN; OD 3.46" (87.9 mm)
Optional Stator Connection: 2-3/8 EUE BOX WEX × 2-3/8 EUE BOX WTB; OD 3.13" (79.4 mm)
Standard Rotor Connection: 7/8" (22.2) API PIN
Min. Tubing for Rotor: 2-3/8 EUE drift · 2-7/8 EUE orbit
Min. Tubing for 3/4" Coil: 2-7/8 EUE (73.0 EUE)
Lift Range: 1,200–3,600 m (3,900–11,800 ft)

Model	m³/day (100 rpm)	bbl/day (100 rpm)	CSA (in² / mm²)	Rotor	Elastomer
4	4	25	0.76 / 490	S, L, P	MN, HN
5 CH	5	31	0.96 / 619	P	SN
7	7	44	0.84 / 542	S, L, P	MN, HN

CSA = Cavity Inflow Cross-Sectional Area. Full specs including rotor drift diameters available on request.

3.50"

3-1/2 Series

8 models · Stator OD 3.50" (88.9 mm) · Lifts 600–3,000 m (2,000–9,800 ft)

Mid-range capacity with 8 models for diverse well conditions.

Series-wide technical specs

Standard Stator Connection: 2-7/8 EUE BOX WHC × 2-7/8 EUE BOX; OD 3.67" (93.2 mm)
Optional Stator Connection: 3-1/2 NUE PIN × 3-1/2 NUE PIN; OD 4.18" (106.2 mm)
Standard Rotor Connection: 7/8" (22.2) API PIN
Min. Tubing for Rotor: 2-3/8 EUE drift · 2-7/8 EUE orbit
Min. Tubing for 3/4" Coil: 3-1/2 EUE (88.9 EUE)
Lift Range: 600–3,000 m (2,000–9,800 ft)

Model	m³/day (100 rpm)	bbl/day (100 rpm)	CSA (in² / mm²)	Rotor	Elastomer
10	10	63	1.11 / 716	S, L, P	SN, MN, HN
13	13	82	1.25 / 806	S, L, P	MN, HN
15	15	94	1.32 / 852	S, L, P	SN, MN, HN
20	20	126	1.32 / 852	S, L, P	SN, MN, HN
30	30	189	1.32 / 852	S, L, P	MN, HN
41	41	258	1.32 / 852	S, L	MN, HN
55	55	346	1.32 / 852	S, L	MN, HN
70	70	440	1.32 / 852	S, L	MN, HN

CSA = Cavity Inflow Cross-Sectional Area. Full specs including rotor drift diameters available on request.

3.75"

3-3/4 Series

10 models · Stator OD 3.75" (95.3 mm) · Lifts 600–3,600 m (2,000–11,800 ft)

Highest-variety series — from low-flow to 755 bbl/day.

Series-wide technical specs

Standard Stator Connection: 3-1/2 EUE PIN × 3-1/2 EUE PIN; OD 4.18" (106.2 mm)
Optional Stator Connection: 2-7/8 EUE BOX WEX × 2-7/8 EUE BOX WTB; OD 3.75" (95.3 mm)
Standard Rotor Connection: 1" (25.4) / 1-1/8" (28.6) API PIN
Min. Tubing for Rotor: 2-7/8 EUE drift · 3-1/2 EUE orbit
Min. Tubing for 3/4" Coil: 3-1/2 EUE (88.9 EUE)
Lift Range: 600–3,600 m (2,000–11,800 ft)

Model	m³/day (100 rpm)	bbl/day (100 rpm)	CSA (in² / mm²)	Rotor	Elastomer
8 CH	8	50	1.42 / 916	P	SN
18 CH	18	113	1.69 / 1,090	P	SN
28	28	176	1.71 / 1,103	S, L, P	SN, MN, HN
36	36	226	1.49 / 961	S, L	MN, HN
43	43	270	1.61 / 1,039	S, L, P	SN, MN, HN
54	54	340	1.71 / 1,103	S, L, P	SN, MN, HN
68	68	428	1.68 / 1,084	S, L, P	MN, HN
85	85	535	1.73 / 1,116	S, L, P	MN, HN
102	102	642	1.71 / 1,103	S, L	MN, HN
120	120	755	1.71 / 1,103	S, L	SN, MN, HN

CSA = Cavity Inflow Cross-Sectional Area. Full specs including rotor drift diameters available on request.

4.13"

4-1/8 Series

12 models · Stator OD 4.13" (104.8 mm) · Lifts 400–3,200 m (1,300–10,500 ft)

High-capacity series for large-tubing installations — up to 1,195 bbl/day.

Series-wide technical specs

Standard Stator Connection: 3-1/2 EUE BOX WHC × 3-1/2 EUE BOX; OD 4.5" (114.3 mm)
Optional Stator Connection: 4 NUE PIN × 4 NUE PIN; OD 4.75" (120.7 mm)
Standard Rotor Connection: 1" (25.4) / 1-1/8" (28.6) API PIN
Min. Tubing for Rotor: 2-7/8 EUE drift · 3-1/2 EUE orbit
Min. Tubing for 3/4" Coil: 4-1/2 EUE or Special Coil Joint
Lift Range: 400–3,200 m (1,300–10,500 ft)

Model	m³/day (100 rpm)	bbl/day (100 rpm)	CSA (in² / mm²)	Rotor	Elastomer
23 CH	23	145	2.08 / 1,342	P	SN
31	31	195	2.10 / 1,355	S, L, P	SN, MN, HN
42	42	264	2.09 / 1,348	S, L	MN, HN
50	50	315	2.09 / 1,348	S, L	MN, HN
61	61	384	2.09 / 1,348	S, L	MN, HN
72	72	453	2.09 / 1,348	S, L	MN, HN
87	87	547	2.09 / 1,348	S, L	MN, HN
105	105	660	2.08 / 1,342	S, L	MN, HN
122	122	767	2.07 / 1,335	S, L	MN, HN
145	145	912	2.07 / 1,335	S, L	MN, HN
167	167	1,050	2.07 / 1,335	S, L	MN, HN
190	190	1,195	2.24 / 1,445	S, L	MN, HN

CSA = Cavity Inflow Cross-Sectional Area. Full specs including rotor drift diameters available on request.

4.75"

4-3/4 Series

5 models · Stator OD 4.75" (120.7 mm) · Lifts 400–3,000 m (1,300–9,800 ft)

Very high flow — for extremely high-productivity wells.

Series-wide technical specs

Standard Stator Connection: 4-1/2 EUE PIN × 4-1/2 EUE PIN; OD 5.56" (141.2 mm)
Optional Stator Connection: 3-1/2 EUE BOX WEX × 3-1/2 EUE BOX WTB; OD 4.75" (120.7 mm)
Standard Rotor Connection: 1" (25.4) / 1-1/8" (28.6) API PIN
Min. Tubing for Rotor: 3-1/2 EUE drift · 4-1/2 EUE orbit
Min. Tubing for 3/4" Coil: 4-1/2 EUE (114.3 EUE)
Lift Range: 400–3,000 m (1,300–9,800 ft)

Model	m³/day (100 rpm)	bbl/day (100 rpm)	CSA (in² / mm²)	Rotor	Elastomer
35 CH	35	220	2.81 / 1,813	P	SN
47	47	296	3.12 / 2,013	S, L, P	SN, MN, HN
88	88	554	3.27 / 2,110	S, L	MN, HN
165	165	1,038	3.27 / 2,110	S, L, P	SN, MN, HN
280	280	1,761	3.27 / 2,110	S, L	MN, HN

CSA = Cavity Inflow Cross-Sectional Area. Full specs including rotor drift diameters available on request.

5.00"

5 Series

3 models · Stator OD 5.00" (127.0 mm) · Lifts 500–3,000 m (1,600–9,800 ft)

Large-bore series with STC connections for high-rate applications.

Series-wide technical specs

Standard Stator Connection: 5 STC PIN × 5 STC PIN; OD 5.56" (141.2 mm)
Optional Stator Connection: 3-1/2 EUE BOX WEX × 3-1/2 EUE BOX WTB; OD 5.00" (127.0 mm)
Standard Rotor Connection: 1-1/8" (28.6) API PIN
Min. Tubing for Rotor: 3-1/2 EUE drift · 4-1/2 EUE orbit
Min. Tubing for 3/4" Coil: 4-1/2 EUE (114.3 EUE)
Lift Range: 500–3,000 m (1,600–9,800 ft)

Model	m³/day (100 rpm)	bbl/day (100 rpm)	CSA (in² / mm²)	Rotor	Elastomer
64	64	403	3.47 / 2,239	S, L, P	MN, HN
118	118	742	3.47 / 2,239	S, L	MN, HN
215	215	1,352	3.47 / 2,239	S, L	MN, HN

CSA = Cavity Inflow Cross-Sectional Area. Full specs including rotor drift diameters available on request.

5.00"

5 (LG) Series

3 models · Stator OD 5.00" (127.0 mm) · Lifts 800–3,000 m (2,600–9,800 ft)

Long-geometry variant of the 5 Series with extended stator profiles.

Series-wide technical specs

Standard Stator Connection: 5 STC PIN × 5 STC PIN; OD 5.56" (141.2 mm)
Optional Stator Connection: 4-1/2 EUE BOX WHC × 4-1/2 EUE BOX WHC; OD 5.13" (130.2 mm)
Standard Rotor Connection: 1-1/8" (28.6) API PIN
Min. Tubing for Rotor: 4-1/2 EUE (drift + orbit)
Min. Tubing for 3/4" Coil: 4-1/2 EUE (114.3 EUE)
Lift Range: 800–3,000 m (2,600–9,800 ft)

Model	m³/day (100 rpm)	bbl/day (100 rpm)	CSA (in² / mm²)	Rotor	Elastomer
101	101	635	3.60 / 2,323	S, L	MN, HN
130	130	818	3.60 / 2,323	S, L	MN, HN
150	150	944	3.60 / 2,323	S, L	MN, HN

CSA = Cavity Inflow Cross-Sectional Area. Full specs including rotor drift diameters available on request.

Field Notes

Production optimization — the rule of thumb.

In any PCP optimization, an RPM increase should be followed by a proportional flow rate increase. If it isn't — pump efficiency is falling and something needs to change.

Step 1 · Gather

What to collect in the field

Acoustic fluid-level devices can have ±5 joints (±50 m) of error — measure carefully and cross-check.

Polished-rod RPM
Polished-rod torque
Amperage (→ HP)
Fluid level (≥ 50 m submergence)
Water cut
GOR / GLR
Flow rate
Pump-intake pressure

Step 2 · Diagnose

If RPM↑ but efficiency↓ — likely causes

Low dynamic level — not enough fluid at pump intake
Reservoir pressure below bubble point — free gas at intake
RPM too high to allow cavity fillage (viscous or non-Newtonian fluids)
Obstructed pump intake
Increased pressure losses in the string

Step 3 · Prescribe

Corrective actions

Reduce RPM to maintain at least 4–5 bar pump-intake pressure
Lower the pump as far as possible to increase submergence
Add a gas separator or tail joints to flow gas up the annulus
Monitor for shortened run life, higher HP draw, and rod-tubing wear

Shortened run lifeHigher HP drawIncreased rod-tubing wear← symptoms if left uncorrected

Need help sizing a PCP for your well?

Our engineering team can match series, elastomer, and rotor configuration to your fluid chemistry, depth, and target rate.

Talk to our team Use the pump selector