STP600 Plunger pump

Technical Specifications

Performance Data (4″ Plunger):

Applications

The STP600 Plunger Pump is deployed across a broad spectrum of oilfield operations:

• Cementing Operations – Pumping cement slurry for well completion, including self-dispensing of cement slurry, slurry pumping, displacing slurry, and pressure testing. The STP600 is the pump of choice for SGJ600-33 cementing trucks used in shale gas development.

• Acidizing Operations – Pumping acid solutions for well stimulation and formation treatment

• Fracturing Operations – High-pressure injection of fracturing fluids for reservoir stimulation

• Sand Control – Gravel packing and sand control operations

• Well Killing – High-pressure fluid injection for well control

• Well Washing – Cleanout and flushing operations

• Circulating Operations – Fluid circulation in drilling and workover operations

The STP600 is particularly valued by operators who need high-pressure, high-displacement pumping capability with proven triplex reliability for intermittent and continuous well service applications.

Product Types

SJ Petro offers the STP600 and related plunger pumps in a variety of configurations:

By Model Variant:

1. STP600 (Standard) – 600 bhp triplex plunger pump with 6″ stroke, 4.61:1 gear ratio, and 100,000 lb rod load capacity.

2. STP600S – Variant of the STP600 with specific fluid end configuration.

3. SJ-600 – Equivalent model designation.

By Plunger Size:

4. 3″ Plunger Configuration – Higher pressure, lower displacement – ideal for high-pressure cementing and acidizing

5. 3.5″ Plunger Configuration – Balanced pressure and displacement for general well service

6. 4″ Plunger Configuration – Higher displacement, moderate pressure – ideal for high-volume pumping

7. 4.5″ Plunger Configuration – Maximum displacement – ideal for sand control and well washing

By Mounting Configuration:

8. Standalone Pumps – Individual pump units for integration into custom skids or packages

9. Skid-Mounted Pump Packages – Complete pumping packages with engine, transmission, and controls on a single skid

10. Truck-Mounted Pump Packages – Integrated into truck-mounted cementing and well service units

By Drive Type:

11. Diesel-Driven Pumps – Powered by diesel engines with mechanical or hydraulic transmissions

12. Electric-Driven Pumps – Variable frequency motor drive for quiet, emissions-free operation

OEM & Customization Solutions

Every operation presents unique challenges, and SJ Petro’s engineering team delivers tailored solutions through comprehensive OEM and customization capabilities:

• Plunger Size Selection – Choose from 3″ to 4.5″ plunger diameters to achieve the precise pressure and flow rate combination for your operation

• Fluid End Material – Specify corrosion-resistant materials for aggressive fluid environments

• Fluid End Configuration – Customize suction and discharge connection interfaces to match your piping requirements

• Gearbox Positioning – The gearbox can be installed on either the left or right side of the pump, with the input shaft offering 16 different installation positions to suit various transmission system requirements

• Power System Integration – Select diesel engine or electric motor drive with your preferred specifications

• Skid Design – Custom skid dimensions, lifting points, and layout for offshore or onshore installation

• Certification – Arrange API, DNV, ABS, or other certifications for international or offshore operations

• Wear Part Customization – Customize plungers, packing, valves, and seats to match your specific operating conditions

Why Choose SJ Petro?

World-Leading Pump Manufacturer

SJ Petro is the world’s most famous manufacturing base for petroleum drilling and production equipment. Our plunger pumps are the power behind SGJ600-33 cementing trucks, which have been deployed in shale gas development with technology reaching internationally advanced levels.

Over 30 Years of Pumping Expertise

SJ Petro began developing cementing equipment in the 1980s. With more than 30 years of continuous engineering and manufacturing experience, we have mastered the design and production of series plunger pumps, mixing control systems, and complete cementing units.

Complete In-House Manufacturing

SJ Petro has established seven production lines for drawworks, gear boxes, cylinders, masts, high pressure manifolds, plunger pumps and post treatment, and three assembly lines for drilling rigs, workover rigs, and cementing and fracturing equipment. Annual production capacity includes over 5,000 plunger pumps.

Advanced Materials Technology

Through fundamental research on pump body materials and optimized structural design, SJ Petro has developed high-strength pump heads with 50% improved toughness and 100% improved hardenability. Pump body service life is twice that of comparable advanced products.

"Million-Stroke” Quality Assurance

Every SJ Petro plunger pump undergoes "million-stroke” type testing before release, validating durability and performance under real-world operating conditions.

API and ABS Certified Quality

SJ Petro holds API certifications and was the first to have a triplex pump ABS type certified after one million cycle tests at maximum rod load. We also maintain ISO9001 and HSE management system certifications.

Interchangeable Parts – Global Serviceability

SJ Petro’s plunger pumps feature wear parts that are interchangeable with major international brands, ensuring easy maintenance and global parts availability.

Compact Design – Maximum Power in Minimum Space

Despite its 600 bhp rating, the STP600 features a heavy-duty design in a small package—a critical advantage for offshore platforms and space-constrained locations.

One-Stop Solution Provider

Beyond manufacturing, we offer equipment inspection, testing, and major overhaul services. From initial design to field service and spare parts supply, SJ Petro delivers complete oil and gas exploration and production equipment solutions.

Frequently Asked Questions

Q: What is the STP600 plunger pump?

A: The STP600 is a 600 bhp horizontal triplex plunger pump with a 6-inch stroke, designed for intermittent well service applications including cementing, acidizing, fracturing, sand control, and well killing.

Q: What is the maximum input power of the STP600?

A: The STP600 is rated at 600 bhp (447 kW) maximum input power.

Q: What is the stroke length?

A: The STP600 has a stroke length of 152.4 mm (6 inches).

Q: What is the maximum rod load?

A: The STP600 has a maximum connecting rod load of 444.5 kN (100,000 lbs).

Q: What plunger sizes are available?

A: The STP600 is available with plunger diameters ranging from 3″ to 4.5″. Common sizes include 3-1/2″ and 4-1/2″.

Q: What is the gear ratio?

A: The STP600 has a gear ratio of 4.61:1.

Q: What is the weight and dimensions of the STP600?

A: The STP600 has a net weight of 2,286 kg and dimensions of 1,550 × 1,350 × 850 mm.

Q: What is the difference between the STP600 and STP600S?

A: The STP600S is a variant of the STP600 with specific fluid end configuration. Both share the same 600 bhp power rating and 6″ stroke.

Q: What fluids can the STP600 handle?

A: The STP600 is designed to pump cement slurries, acid solutions, fracturing fluids, sand-laden fluids, mud, and other oil well servicing fluids.

Q: Can the gearbox be positioned on either side of the pump?

A: Yes. The gearbox can be installed on either the left or right side of the pump, with the input shaft offering 16 different installation positions to suit various transmission system requirements.

Q: Are SJ Petro plunger pump wear parts interchangeable with other brands?

A: Yes. SJ Petro’s plunger pumps feature wear parts that are interchangeable with major international brands, ensuring easy maintenance and global parts availability.

Q: What quality testing do SJ Petro plunger pumps undergo?

A: Every SJ Petro plunger pump undergoes "million-stroke” type testing before release, validating durability and performance under real-world operating conditions. The TPD600 triplex pump was the first to be ABS type certified after one million cycle tests at maximum rod load.

Q: Are SJ Petro products API certified?

A: Yes. SJ Petro holds API certifications, ISO9001, and HSE management system certifications.

Q: Do you offer OEM or customized solutions?

A: Absolutely. We offer comprehensive customization including plunger size selection, fluid end material, fluid end configuration, gearbox positioning, power system integration, skid design, and certification.

Q: What is your manufacturing capacity and lead time?

A: We produce over 5,000 plunger pumps annually with comprehensive manufacturing capabilities. Lead times vary by configuration—contact our sales team for specific project timelines.

Q: Do you provide after-sales support and spare parts?

A: Yes. We offer comprehensive after-sales support including spare parts supply, equipment inspection, testing, and major overhaul services.

Q: Where have STP600 pumps been deployed?

A: STP600 pumps are the power behind SGJ600-33 cementing trucks deployed in shale gas development and are widely used in cementing, acidizing, and fracturing operations across China’s major oilfields and international markets.

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