Oilfield Pumping Unit – API 11E Beam, Beamless & Reversing Types

Belt pumping unit

RIGRS supplies oilfield pumping units for artificial-lift applications, including conventional API 11E beam pumping units, beamless long-stroke units, motor-reversing units and hydraulic pumping systems.
>Pumping unit selection should be based on polished rod load, stroke length, stroke frequency, well depth, production rate, available power and site conditions.
For replacement or new-project requirements, buyers can send the existing unit model, well data or project specification for technical review.
Email: info@rigrs.com
WhatsApp: +86 18615995257

How to Select the Right Pumping Unit

Advantages of RIGRS Pumping Units

1. Long stroke and low stroke: Long stroke increases the filling coefficient of the pump, thereby improving system efficiency. Low stroke can effectively reduce fatigue and wear of downhole equipment, extend the maintenance-free period of oil wells, and reduce operating costs.

2. Pure mechanical transmission, smooth switching process: relying on heavy-duty wide belts with large load and long life to transmit power, its elastic buffering effect can reduce the switching impact and make the underground equipment run stably.

3. Low torque requirement: Since the arm is in the range of 0.31-0.43 meters, the torque requirement is greatly reducing. Equipped with a small power motor and a small torque reducer, it can save energy by 10-40% compared with conventional walking beam machines.

4. The structural design has been optimizing: the disc brake system ensures safe operation; the overall displacement repair; the folding structure provides convenience in installation and transportation; the moving parts of the whole machine are equipping with safety shields and guardrails, making operation and maintenance safe and convenient.

5. It uses gravity symmetrical balance, which is a pure mechanical balance, and the balance adjustment is convenient and simple.

6. Strong reliability, no need for frequent maintenance: It uses wear-resistant bearings, long-life belts and heavy-duty chains to ensure the high reliability of the whole machine. At the same time, it also has a complete lubrication system, a reliable brake system and overall sealing characteristics, so that the machine does not require frequent maintenance.

7. The oil production control system is perfect, which can not only pump liquid with a large pump, but also realize deep pumping with a small pump.

Beam pumping unit

Beam pumping unit is a commonly using equipment in oil production. It adopts mechanical balance and its technical parameters strictly follow industry standards and API specifications. The pumping unit produced by the company is quite mature in technology and can be well appling in various climate environments and different application scenarios. It can also be specially designed and produced according to the specific needs of customers.

The product has the following characteristics

1. The overall structural design is scientific and reasonable, the working state is stable during operation, the noise generating is small, the operation is simple and convenient, and the maintenance is relatively easy.

2. The donkey head has various designs, and any of the three forms of flipping, hanging or side rotation can be selected according to the actual situation.

3. The brake system adopts an external holding structure and is equipping with a safety device. It is flexible and easy to operate, the braking effect is rapid, and it has high safety and reliability.
4. The frame design is unique. The frame of the small machine adopts a tower structure, which has strong stability and is very conducive to on-site installation. While the frame of the large machine adopts a movable retractable structure, which is convenient for packaging and transportation.
5. The crank counterweight uses gear racks for transmission, and the adjustment process is easy and convenient, and the adjustment accuracy is high.

Motor reversing pumping unit

The intelligent rotary motor reversing pumping unit is a new generation of oil production machinery developing after in-depth analysis of the advantages and disadvantages of traditional pumping units in oil field applications, while integrating the strengths of the current ROTAFL EX belt pumping unit.

The product has the following characteristics

1. It has the characteristics of quietness and energy saving.

It uses a low-speed, high-torque permanent magnet motor. Which has a large torque density, excellent anti-demagnetization ability, high efficiency power factor, and strong overload capacity. At a distance of 1 meter from the pumping unit, the noise is less than 51dB, and at a distance of 10 meters, the noise is less than 45dB. The noise of the whole machine meets the Class I standard stipulated in the national standard GB3096-2008. And is particularly suitable for oil well mining near residential areas and business districts.

2. The structure of its new permanent magnet motor is unique.

It not only retains the characteristics of conventional permanent magnet motors in simple and convenient production and high reliability in use. But also has the advantages of compact structure of outer rotor motors, low motor failure rate, and convenient maintenance.

3. It has a dual brake protection mechanism with high safety.

It adopts a dual brake system that combines a built-in normally closed brake device (9t) of the motor with an external normally closed hydraulic disc brake device (12t). If an unexpected situation occurs during operation, the brake system of the pumping unit will start immediately, stopping the entire oil production system, thereby protecting the entire oil production system from damage.

4. The structure of the whole machine is relatively simple, with fewer vulnerable parts, small maintenance workload, and relatively low maintenance costs. The pumping unit only needs to be inspected and maintained once a year, which greatly reduces the labor intensity of workers and reduces maintenance costs.

5. According to the actual working conditions of different oil wells, the up and down strokes and strokes can be adjusted without stopping the pumping unit. And the strokes and strokes are steplessly adjustable, which can achieve multiple operating modes such as fast up and slow down, slow up and fast down, and the same speed up and down.

6. During the pumping process, 90% of the process is uniform motion, and the reversing is uniform acceleration and deceleration, which effectively reduces the impact load on the rod and pump and extends the pump inspection cycle.

Hydraulic pumping unit

The hydraulic pumping unit system pioneered the use of double cylinders to control the double-well circulation control circuit. The two cylinders operate alternately up and down, which can recover the energy of the hydraulic cylinder’s downward movement, and the energy-saving effect is quite significant. After many on-site industrial tests, it can fully meet the needs of oil and gas production in oil fields, and the operation is stable and reliable.

Hydraulic pumping units are very suitable for use in areas where large vehicles cannot pass, such as coalbed methane and tropical rainforests, due to their small footprint, light weight, and flexible transportation. The hydraulic pumping unit system can also use the gas unit to directly drive the hydraulic system according to the actual conditions on site, thus reducing the need to install power cables.

Its advantages are as follows

1. A pump group and a double cylinder are using to control the control circuit of the double wells.

The double cylinders work alternately up and down, which can make full use of electrical energy and gravitational potential energy. When the hydraulic cylinder goes up, it is driven by hydraulic oil to work, and when the hydraulic cylinder goes down, it is pulling down by the sucker rod. The gravitational potential energy generating by the sucker rod going down will be converting into hydraulic energy, thereby greatly reducing the supporting power. The supporting power of the double well group is about 80% of the supporting power of a single well with the same load, which has significant economic and social benefits.

2. The hydraulic control unit adopts a modular combination method.

Different modules can be combining together to achieve a station to control two wells, four wells, six wells, eight wells or ten wells at the same time, which is especially suitable for blocks with relatively concentrating well locations.

3. The whole machine realizes the automatic control of electromechanical and hydraulic integration.

The hydraulic system adopts electro-hydraulic proportional variable technology, which can control the speed of the hydraulic cylinder running up and down, and the stroke can be adjusting steplessly. There is no energy loss caused by throttling speed regulation in the system, and the optimal matching of load, running speed and driving power is achieving. The operation and change of direction are stable and reliable, and it can switch between single well and double well.

4. With different electrical control modules, it is convenient to adjust the operating parameters on site or remotely, and the operating status can be remotely monitoring and data collecting.

5. Different strokes and strokes can be obtaining by inputting different parameters from the controller, and the adjustment of strokes and strokes is very convenient.

6. It can realize large load, large stroke and low stroke operation, which can maximize the production capacity of oil wells. The suspension point can be selecting between 30-400 (KN), and the suspension point stroke can be selecting between 1.8-10 (m).

7. The hydraulic pumping unit has a compact structure, small size, light weight, and small footprint. It is particularly suitable for small well spacing, tidal flats, offshore platforms, and mountainous wells. It does not require an installation platform, which can greatly save the overall cost.

8. The hydraulic pumping unit has no moving parts on the periphery of the hydraulic pump station and hydraulic cylinder, and does not require well site safety protection, and the operation is safe and reliable. The hydraulic station can be noise-reduced, and the noise is very low when the whole machine is running, which is particularly suitable for installation and operation in residential areas and well sites around cities.

High-Load and Long-Stroke Applications

High-load or deep-well applications should not be selecting from horsepower alone.
>The following should be reviewing together:
Maximum polished rod load
Required stroke
Sucker-rod string load
Pumping speed
Well depth
Production target
Reducer capacity
Available drive power
For long-stroke applications, beamless or other long-stroke configurations may be considering where appropriate.

RIGRS Pumping Unit – FAQ

Q1: Is API 11E applicable to all oilfield pumping units?

A: No. API Spec 11E specifically covers beam pumping units and their design and rating requirements. Beamless, hydraulic and motor-reversing units may follow different design criteria or project specifications depending on the equipment type.

Q2: What data is needed to select an API 11E beam pumping unit?

A: Provide maximum polished rod load, required stroke length, stroke frequency, reducer requirement, motor power, voltage, frequency and site conditions.

Q3: Which pumping unit is suitable for a deep well?

A: Deep-well selection depends on polished rod load, sucker-rod string load, required stroke and production target. High-load beam units or long-stroke beamless units may be considered after reviewing the actual well data.

Q4: When should a beamless pumping unit be considered?

A: A beamless unit can be considered when long stroke, compact structure, reduced installation height or a different mechanical layout is requiring.

Q5: What is the difference between a beam pumping unit and a motor-reversing unit?

A: A beam pumping unit uses a mechanical walking-beam system to produce reciprocating motion. A motor-reversing unit uses controlled motor reversal to move the polished rod without a conventional walking beam.

Q6: Can a pumping unit be customizing for 50 Hz power?

A: Yes. Motor and control-system configuration can be reviewing according to the site voltage and frequency. Provide the actual electrical specification before quotation.

Q7: What information is needed for a replacement pumping unit?

A: Send the existing model, polished rod load, stroke, pumping speed, foundation dimensions, motor data and available nameplate or drawings.

Q8: Can spare parts be supplied with the pumping unit?

A: Yes. A recommended spare-parts package can be quoted according to the selected unit type and maintenance plan.