E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 17/00 (2006.01) E21B 43/12 (2006.01)
Patent
CA 2331933
The hydraulic load equalizer concerns to petroleum engineering. It could be used in the mechanical pumping system. The hydraulic load equalizer consists in a reduction of loading of the sucker rods. The failures of the sucker rod string are due to the weight of welt-pumped fluids on the piston of the bottom- reciprocating pump. The reduction of the failures of sucker rods results in their increase of work services. The sucker rods in a reciprocating pumping system are the most important elements between the bottom reciprocating pump and superficial mechanical pumping unit. The sucker rods are submitted to many efforts in the pumping process that act into failures. They have many connections and are actually the weakest part of this artificial lifting system. The weight on the sucker rods develops of the following basic forces. 1) static load from weight of sucker rods and fluids on it. The friction forces of sucker rods on the inner surface of the pipelines and the friction force between the piston and surrounding casing cylinder of reciprocating pump. 2) A force of inertia of driving weights; 3) various dynamic loads. The sucker rods could be broken due to metallic fatigue. They have a small square cross-area instead of the pipelines. During the pumping process the production pipelines work in a considerable safe range of load. Moreover a sealing bottom packer fixes the production pipeline with the casing pipeline. The hydraulic load equalizer is connected with the production pipelines thus, it helps to sucker rods to decrease the stress forces.
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