STIPumpCard™ is powerful and user-friendly software for simulating the dynamic behavior of pumpjacks for a wide range of wells. STIPumpCard can simulate both vertical and deviated wells and predict the load at the plunger from a surface card as well as side forces in deviated wells and wells with long horizontal sections. STIPumpCard has been validated with data from instrumented wells and can accurately model wells over 10,000 ft in length as well as phenomena such as fluid pound, gas interference, gas locking, Stribeck friction, and fluid inertia.

In addition to being accurate and reliable, under a wide range of conditions, STIPumpCard has some unique features not found in other industry software such as allowing a user to specify different upstroke and downstroke rates and simulation of both static and dynamic friction.

STIPumpCard produces a number of plots, including dynamometer cards, fatigue life, axial loading, speed reducer torque and rod side forces. STIPumpCard also predicts other parameters such as the minimum required motor power and required speed reducer torque rating.

STIPumpCard supports six types of units; Conventional, Mark II, Air Balanced, Reverse Mark (Torque Master), Hydraulic, and Rotaflex as well as a pure sinusoidal motion at the surface. To facilitate the design process, STIPumpCard has the capability of calculating the optimal taper lengths to minimize Goodman stress, for conventional steel rods or high strength steel rods.

STIPumpCard contains conversions and calculators to aid in the calculation of input parameters, which include:

  • Unit conversion
  • Density conversion
  • Pump intake pressure calculator
  • Stroke rate calculator
  • Free gas calculator
  • Damping factor estimator
  • Pump volumetric efficiency (slippage)
  • Buckling predictor
  • Fluid Compressibility calculator