API RP 11L PDF

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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For the last 25 years, this method has been thestandard for the design of sucker-rod pumping systems. Thetendency to oversimplify the methods forpredictingsystemperformanceisnotduetoa limited knowledge concerning the operation of sucker rodequipment, Quite thecontrary,thebasicoperatingcharacteristics of suckerrodsystemshave beenreasonablywellunderstood formanyyears. SITE To ensure the functioning of the site, we use cookies.

API RP 11L EBOOK

F, -Frequency Factor Table 4. Thus, fortaperedstrings, Fc intaperedrod greaterthanunity. The solutions obtainedare for equivalent, uniform non-tapered rod strings.

Calculatethestress if it iswithin inthesuckerrodstodetermine acceptablelimits, 4.

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It is believed, however, that the values for maximum and minimum loads and for pump stroke will be reasonably good. It is now necessary to compare these calculated loads with limitations imposed by thepreliminary selection. Thus, fortaperedstrings, Fc intaperedrod greaterthanunity. Publishers Content Coverage Privacy.

The developis mathematically ment of representativeformulas complicatedbecause of thedifficulty of expressing boundary conditions which suitably reflect the openingandclosing of thevalves of xpi these are themselves a function of the motion of the system and the fluid-flow conditions in the pump. Some of these unusual conditions are: Generally, the limiting factor on the curve api rp 11l the peak torque rating of the unit.

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Also, the effect of the rod coupling can cause an apparent increase in density resulting in 11p decrease in propagation velocity.

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

Discussion of Nondimensional Parameters Well flawing-off, I 2. Solve for S, and PD: Log in to your subscription Username.

However,because of 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 zpi the loads has frequently beenoffset to some degree by a tendency to overestimate the well requirements.

API RP 11L EBOOK

Sucker Rod Pumping Wells: Emay, SuiteDallas TX Generdly, three steps are required in designing an installation. This assumption makes possible a mathematical simplification wherein thespringequation anordinarydifferentialequato simulatethecharacteristics of the tion isused is mathesucker rod. Sucker Rod Pump pump. Suckerrodsizeanddesign — – 4. Examination of the formula will revealthatthecontraction of the tubing caused by the transfer of the fluid load from the standing valve to the traveling valve is subtracted from the calculated plunger stroke, It is realized that this formula is highly simplified fp not mathe- 7 5 matically correct, but it is close enough for practical application.

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A mathematical evaluation of sucker-rod pumping, forpracticalpurposes,revolvesaround the development of equations to express the motion and the state of stress of sucker rods.

This, of course, is an unreal assumption although the values for friction apu this case should be minor and of negligible importance in the design. Pumping unit motion was rrp based 11k a medium slip motor. All API stroke lengths aile covered. We share information about your activities on the site with our partners and Google partners: R of this publication should become completely familiar with its scope and content.

Examination of the formula will revealthatthecontraction of the tubing caused by the qpi of the fluid load from the standing valve to the traveling valve is subtracted from the calculated plunger stroke, It is realized that this formula is highly simplified and not mathe- 7 5 matically correct, but it is close enough for practical application.

Very viscous fluid, c.