Abstract

Sucker rod computations in accordance with Ref. 1 are both tedious and time consuming. Each time a pumping parameter is changed, such as rod designation, pumping parameter is changed, such as rod designation, pumping speed, the calculation must be repeated. pumping speed, the calculation must be repeated. Three programs to handle these calculations have been written for the Hewlett Packard HP 87 XM micro-computer.

The first program is a dynamic analysis program for either an APT Class I or Class III pump.

The second program performs the detailed calculations in accordance with Ref. 1 and prints a form that is essentially the same as the form No. 11L-1 of Ref. 1.

The third program performs the "RP 11L calculation" for a number of rod designations printing out:

Total rod weight Pump displacement Peak polish rod load Minimum polish rod load Peak torque Polish rod horsepower Maximum stress Ratio of daily production to polish rod horsepower for each API rod number in the range of APT rod numbers being considered.

Introduction

We are all aware of the impact that computer technology has had over the past twenty years. In the past, the expense of large computers has put the benefits past, the expense of large computers has put the benefits from computers out of reach of many small companies throughout much of the country.

However, today's microcomputers, which offer both affordability and portability, have the potential to change this situation dramatically. These desktop computing systems provide a mechanism to put tremendous resources into the hands of small and large oil producers alike. producers alike. This paper presents three computer programs designed specifically for this purpose. They represent analysis tools for those involved in traditional pumping operations. This set of three programs are pumping operations. This set of three programs are designed to run on the Hewlett Packard 86/87 micro-computer system. They are:

* Kinematics - a pumping unit dynamic analysis program. It performs a dynamic analysis on either an APT Class I or Class III pumping unit, yielding displacement, velocity, and acceleration of the horsehead, torque factors, and an estimate of loads induced at the well head.

* RP/11L - an APT RP11L design calculation program. It performs all of the design calculations for a well installation per the standards described in the APT RP11L. It then prints a completed 11L-1 form.

* OPT/11L - an optimization program. It performs the same calculations as RP/11L but does so for a selected range of sucker rod sizes.

All of the programs are menu driven, making extensive use of programmable function keys for user input. Prompts are issued for all input.

SYSTEM CONFIGURATION

The following system is required to use three programs. programs. Computer: HP-86 or 87 with 64K memory (minimum). Mass Storage: Dual 3-1/2" or 5-1/4" floppies (HP-9121D or 82901M). Printer: HP-82905B required for hard copy output. Printer: HP-82905B required for hard copy output. ROMS: Plotter ROM (HP-00087-15002) required for graphics dump to 82905B printer. Also required ROM drawer (HP-82936A).

KINEMATICS

Kinematics performs a kinematic analysis of either a Class I or Class III pumping unit as described by APT STD 11E. The output includes the displacement, velocity, and acceleration of the pumping unit horsehead, the torque factors at crank increments of 10, and an estimate of loads and torques induced by the load at the well head.

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