B Type Pumping Unit / Beam Balanced Pumping Unit

Beam Balanced pumping units have been designed to International Standard requirements for pumping unit design. In addition, all individual components of the unit and the unit as a whole represent the very best engineering design, production facilities, quality, and field experience.

  • Sanjack has passed ISO9001, SO14001 and OHSAS18001 certificate.
  • Sanjack adopt the principle of combining International Standard, National Standard and User’s view to design.
  • Full support on your customised requirement
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The Beam Balanced pumping unit is a Class I lever system having beam counterbalance.

The Beam Balanced unit may be operated in either direction of rotation.

The four-bar lever system converts rotational motion at the crank to reciprocating motion at the horsehead and in turn to the downhole pump.

beam balanced pumping unit

Beam Balanced pumping units have been designed to International standard requirements for pumping unit design.

In addition, all individual components of the unit and the unit as a whole represent the very best engineering design, production facilities, quality, and field experience.

The Beam Balanced unit will give many years of dependable service when properly installed, maintained, and operated within its load and torque ratings.

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

Features:

  • The structure is simple. The operation and maintenance are convenient and the service life is long.
  • The involute or double arc herringbone gear reducer runs smoothly and reliably.
  • The quality of the whole unit is small. The installation and transportation are convenient.
  • This unit is suitable for the shallow wells with short stroke and small load.
  • Good 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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