Buy API 11BR: RECOMMENDED PRACTICE FOR THE CARE AND HANDLING OF SUCKER RODS from SAI Global. Find the most up-to-date version of API RP 11BR at Engineering Generally, API standards are reviewed and revised, reaffirmed, or withdrawn at  API RP 11BR, Recommended Practice for Care and Handling of Sucker.
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Adjustments to the predictions should be made for future troubleshooting and any further design changes.
API RP 11BR Revisions on Sucker Rod Makeup
An SPE paper by Powers  considers the factors that enter into the decision about when to replace the entire rod 111br after sustaining the calculated number of failures. In a noncorrosive environment, the endurance limit of steel is primarily determined by the maximum stress, the range of stresses, and the number of stress reversals.
E due to arc P This cable was a continuous strand that required special pulling equipment. Ideally, a rod string should appi a continuous taper from top to bottom. These rods have been effectively used to produce approximately BFPD from a depth of approximately 14, ft.
Other use of this presentation is prohibited without the expressed written permission of the author s. Proper running, handling, and makeup procedures should be followed to secure maximum service ai a rod string. Fiber-reinforced plastic FRP sucker rods may be used instead of metal under certain conditions.
Sucker-rod strings are lifting a great deal of weight every cycle.
Without applying new or additional thread lubricant, repeat steps 2, 3, 4, and 5 for 10 complete cycles. Usually, wells of the same type in a field can be grouped together and the necessary calculations do not have to be apl for each well. Sufficient sinker bars or a special pull-down pai had to be used to keep any compressive force from acting on the strand. Thus, they could be used in a aapi sulfide H 2 S environment in which the strength of Grade C rods is exceeded. The development of the wave equation for sucker-rod lift by S.
As with any specialty equipment, good field testing and records for several years in which good handling and operating practices were followed are required to prove the benefit for any of these non-API rods. However, this rod type may be more notch-sensitive and may require better handling and corrosion protection than normal API-type rods.
These rods have a special heat treatment that should put the surface in a compressive set. Currently, most operators and rod manufacturers have proprietary rod-string design programs that include these data.
The disadvantages include the need for a special wheeled pulling rig, and the two different pulling units are required to service apj well if the tubing has to be pulled. Despite having high strength and a small cross-sectional area, it was expensive and ran into field support problems similar to those of flexible strands and CORODs.
Maximum tension 40 ksi Edward L.
11b of the earliest means used for designing tapered sucker-rod strings is in the Sucker Rod Handbook. They also are standardized in size and performance by API Spec. The high-strength group is generally harder and higher strength than Grade D and may be more susceptible to hydrogen embrittlement and notch effects that may then decrease run life.
Inspect the pin and coupling threads for visual damage without removing thread lubricant.
Zaba  detailed the next refinement of sucker-rod loading, which was the organization of the Sucker Rod Pumping Research Inc. Apply the appropriate CD value for the rod size and grade.
The proper design will decrease the stress on the rods above the bottom section. If any of the strands furnished the weight that was required to help open the traveling valve, the strands immediately above the sinker bars failed in short order because of the compressive forces.
11bg Flashcards Grammar checker. Approximately 40 years ago, a top steel manufacturer experimented with the use pai plastic-coated wire cable instead of sucker rods.
RP 11BR Archives – Production Technology
Buoyancy of the rod string is not taken into account. These variables include, but are not limited to: The accuracy in determining the applied torque value is cost 11bt. Regardless of what method or program is used to predict loads, once the equipment is installed and the well has stable production and fluid levels, it is recommended that a dynamometer survey be run with a load-capable dynamometer attached to the polished rod. The Case Study – Brandon L.
API RP 11BR Revisions on Sucker Rod Makeup
However, they both show the same trends of cost versus torque accuracy. The tensile strength is generally greater thanpsi, while the yield strength is generally greater thanpsi; therefore, these rods could not be classified as API Grade D.
Worksheet for ali 8. The sucker-rod string is often highly stressed and usually fails zpi of the repeated load reversals. Recommendations are presented for derating based on the class of the inspected rod, according to the inspection-criteria classes in API RP 11BR. Non-API sucker rods generally fall into two groups: The advantage of this rod is its ability to pull the entire rod string in one piece with a special pulling unit.
An allowable load or stress curve should be developed to discern during the design of a rod wpi if it is overloaded, and adjustments should be made to prevent this. Worksheet 36 – Thermal Processes Review. This method correlates strain guage readings in the laboratory versus the applied torsional load during makeup and the appi movement of the coupling to provide the required connection preload stress.