Find the most up-to-date version of API RP 11L at Engineering A 6-page educational info-graphic summarizing the most important principles underlying successful Rod Pumping Operation. Topics include: Downhole Pump . API RP 11L Recommended Practice for Design Calculations for Sucker Rod Pumping Systems (conventional Units). Front Cover. American Petroleum Institute.

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Peer reviewed only Published between: The lumped nature of tapered rods changes two variables used to calculatethe natural frequency of the rod system: Theseassumptions also apply to the solution method presented in this paper. When referring to Figures 4. Numerousrunswere made representing a wide range of conditions. This method of design will generally give values for load and torque values calculated by many that are higherthan previously used pumping design formulas.

Society of Petroleum Engineers Disciplines 3. Generally speaking, a higher slip prime mover results in slight decreases in the maximum load and a slight increase in the minimum load but also tends to reduce the subsurface pump stroke; therefore!

This value is identified with the symbol Sp. Sucker Rod the research phase its dissoluPumpingResearch,Incorporated,before to Amertion, released these correlated test results ican Petroleum Fp for publication, This R e c m m d e d Practice for 111l Design Calculations of Sucker Rod PumpingSystems usingconventional pumpingunits is basedonthesecorrelations.


A correction in pump strokeis made by simply calculatingthe amount of 11o stretch whichwilloccur with the in the designand subtracting this fluidloadused amount of strokefromthenetplungerstroke at the bottom of r; hole.

It will usually be found necessary to make more wpi api rp 11l calculation to bring the limitations of the variouscomponents of theinstallationintoagreement. Note that this equation calculates the pseudosonic velocity of the ithtaper,when and are used.

In addition, and ,which appear on Lines 9 and 16, apii be defined by equations other than fp on the form. Suckerrodsizeanddesign — – 4.

At higher speeds, this relation breaks down as dynamic effects become more important. Calculatethestress if it iswithin inthesuckerrodstodetermine acceptablelimits, 4. SITE To ensure the functioning of the site, we use cookies. Solve for S, and PD: The boundary condition which api rp 11l the behavior of the downholepumppresentsparticular difficulties, and investigators in the past have made its regard.

For units with drastically different geometrg fromthatassumed, the simulation will not be accurate and the values calculated will be more 111l.

The calculated value for torque w i l l not be even approximately right and a torque c a l d a tion must be made by some other method. Record Non-Dimensional Factors from Figures4.

Note that RP 11L gives approximate solutions to the rod-design problembecause of the many simplifying api rp 11l involved in its preparation. Well flawing-off, I 2.


API RP 11L – Design calculation for sucker rod pumping system – PDF Free Download

If the pump displacement calknown or anticiculated in step 14 fails to satisfy patedrequirements,appropriateadjustmentsmust be made in the assumed data and steps 1 through 14 repeated.

All sonic velocities, and allare used in theequation. Similarly, was defined by Eq. Pumping unit motion was assumed based on a medium slip motor.


All API stroke lengths aile covered. Very viscous fluid, c. Recommended Practice for Design Calculatio? Installation of underground petroleum storage tank.

Proceedings of an international conference Diverless and Deepwater Techology: Some of these unusual conditions are: However,because 11o the many known cases in which tubing is unanchored, a formulaisincludedwhich,experienceindicates, will giveavery close approximation of relative plunger travel with respect to the pump. This tendency of previously used formulas to underestimate the loads has frequently beenoffset to some degree by a tendency to overestimate the well requirements.

Summary This paper presents a method for using the API recommended 111l for thedesign of sucker-rod pumping systems with fiberglass practice for the design ofsucker-rod pumping systems with fiberglass composite rod strings.