B Type Pumping Unit / Beam Balanced Pumping Unit

Beam Balanced pumping units have been designed to API (American Petroleum Institute) 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, API Q1, API11E, SO14001 and OHSAS18001 certificate.
  • Sanjack adopt the principle of combining API Standard, National Standard and User’s view to design.
  • Full support on your customised requirement

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 API 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
ItemB25D-67-36B40D-89-48B57D-76-48B57D-109-54B80D-133-54B80D-119-64
Basic ParametersRated Polish Rod Capacity (lbs)6,7008,9007,60010,90013,30011,900
Designat Stroke Length (in)364848545464
Max. Stroke Frequency (r/min)202020202020
Balanced TypeBeam Balanced
Crank DirectionClockwise or Counterclockwise
Gear
Reducer
Rated Torque(in.lbs)25,00040,00057,00057,00080,00080,000
Model25D40D57D57D80D80D
Gear TypeDouble circular arc gear reducer or Involute gear reducer
Reducing Ratio32.8532.1831.7331.7331.7431.74
Center Range (in)16.5417.7219.68519.68521.6521.65
Center Height (in)11.81112.213.38613.38613.7813.78
Oil Storage quantity(U.S. Gal)8912121616
Lubricant20# Gear lubricant in winter,200# Gear lubricant in summer
Sheave Diameter(in)20″20″25″25″25″25″
Sheave groove type2B3B3B3B3B3B
Balance AssemblyWeight of Cranks (Lbs)115×2211×2211×2211×2211×2213×2
Wrist Pin bore
Positions (in)
stroke 112.0117.7217.7217.7217.7218.11
stroke 212.0117.7217.7217.7217.7218.11
stroke 37.99
stroke 47.99
Distance between equalizer and center bearing, instroke 126.6545.2845.2845.2845.2841.93
stroke 232.6858.2758.2758.2758.2754.92
stroke 326.65
stroke 432.68
WirelineType16 6×37+IWR-177022 6×37+IWR-177022 6×37+IWR-177022 6×37+IWR-177022 6×37+IWR-177022 6×37+IWR-1770
Length, in103163.5169.3176176193
OtherOverall Dimensions
L*W*H (in)
148×75×120209×82×142211×82×142223×87×151223×87×151220×87×155

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