B Type Pumping Unit / Beam Balanced Pumping Unit

The beam balanced pumping unit is designed to meet API (American Petroleum Institute) standards for pumping unit design requirements. In addition, all the individual components of the unit and the unit as a whole represent the best engineering design, production facilities, quality and field experience.

  •  Sanjack has been certified by ISO9001, API Q1, API11E, SO14001 and OHSAS18001.
  • Sanjack designs according to the principle of combining API standards, national standards and users’ views.

Beam balancing pumping unit is a kind of I – level lever system with beam balancing. The beam balancing device can be operated in either rotation direction. The four-bar lever system converts the rotational motion at the crank to the reciprocating motion at the horse’s head, which in turn converts to the downhole pump.

The design of the beam balancing pumping unit meets the requirements of API standards for pumping unit design. In addition, all the individual components of the unit and the unit as a whole represent the best engineering design, production facilities, quality and field experience. When properly installed, maintained and operated within their load and torque ratings, beam balancing units provide years of reliable service.

Beam Balanced Pumping Unit structure

1.Base 2.Samson Post 3. Center Bearing 4. Clamp Block 5.Carrier Bar 6.Wireline Assembly 7. Horsehead 8.Walking Beam 9. Counterbalance Adjustment Screw Assembly 10.Beam Weights 11.Brakeshoe w/Lever Assembly 12.Saddle Bearing Lube Line 13.Tail earing 14.Pitman 15.Tail Bearing Lube Line 16.Crank Pin Bearing Assembly 17.Crank Arm 18.Gear Reducer 19.Sheave 20.Motor Rails 21. Brake Lever

Beam Balanced Beam Pump Features:
• Simple structure, easy operation, convenient maintenance and long service life.
• Involute or double circular herringbone gear reducer runs smoothly and reliably.
• The whole unit is low weight. Easy to install and transport.

• The unit is suitable for shallow Wells with short strokes and low loads.
• Excellent balance effect and energy saving.

Model
Item B25D-67-36 B40D-89-48 B57D-76-48 B57D-109-54 B80D-133-54 B80D-119-64
Basic Parameters Rated Polish Rod Capacity (lbs) 6,700 8,900 7,600 10,900 13,300 11,900
Designat Stroke Length (in) 36 48 48 54 54 64
Max. Stroke Frequency (r/min) 20 20 20 20 20 20
Balanced Type Beam Balanced
Crank Direction Clockwise or Counterclockwise
Gear
Reducer
Rated Torque(in.lbs) 25,000 40,000 57,000 57,000 80,000 80,000
Model 25D 40D 57D 57D 80D 80D
Gear Type Double circular arc gear reducer or Involute gear reducer
Reducing Ratio 32.85 32.18 31.73 31.73 31.74 31.74
Center Range (in) 16.54 17.72 19.685 19.685 21.65 21.65
Center Height (in) 11.811 12.2 13.386 13.386 13.78 13.78
Oil Storage quantity(U.S. Gal) 8 9 12 12 16 16
Lubricant 20# Gear lubricant in winter,200# Gear lubricant in summer
Sheave Diameter(in) 20″ 20″ 25″ 25″ 25″ 25″
Sheave groove type 2B 3B 3B 3B 3B 3B
Balance Assembly Weight of Cranks (Lbs) 115×2 211×2 211×2 211×2 211×2 213×2
Wrist Pin bore
Positions (in)
stroke 1 12.01 17.72 17.72 17.72 17.72 18.11
stroke 2 12.01 17.72 17.72 17.72 17.72 18.11
stroke 3 7.99
stroke 4 7.99
Distance between equalizer and center bearing, in stroke 1 26.65 45.28 45.28 45.28 45.28 41.93
stroke 2 32.68 58.27 58.27 58.27 58.27 54.92
stroke 3 26.65
stroke 4 32.68
Wireline Type 16 6×37+IWR-1770 22 6×37+IWR-1770 22 6×37+IWR-1770 22 6×37+IWR-1770 22 6×37+IWR-1770 22 6×37+IWR-1770
Length, in 103 163.5 169.3 176 176 193
Other Overall Dimensions
L*W*H (in)
148×75×120 209×82×142 211×82×142 223×87×151 223×87×151 220×87×155

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