Development Of Friction Type Pumping Unit

Pumping unit is common equipment in the production of oil field,low frequency,high stroke friction-pumping unit is the hot spot in the field of pumping uint because of a simple structure,high efficiency and energy-saving advantages.In this paper,the new energy-saving pumping units and their level of technology in domestic and international oilfield were analyzed,a design of the friction-pumping unit was proposed,a type selection and design of WCYTT12-6-5.4-Z type friction-pumping unit was studied.The major works done are as follows:According to specific requirements of present pumping units of our country,the work principle of fixing scheme of energy-saving friction-pumping unit were proposed.And the basic parameters of friction-pumping unit were determined. The type-selection design and strength check of the main components of WCYJT12-6-5.4-Z friction-puming unit,including friction roller,guide roller,tower frame,balance box,moving to make way institutions,etc.,were done.The3-D models of the main components were established by Soliworks software.the finite element analysis and calculation of tower were done by ALGOR software.The motion and dynamic mechanical analyses of friction-pumping unit were done.The variation and mathematical expression of suspended displacement, velocity,acceleration velocity of pumping unit during the working process were obtained.And the variation of suspend point load during up and down stroke was calculated. According to the control requirements of friction-pumping unit,the control system of friction-pumiping unit based on the programmable logic controllers and inverter was determined.lt can achieve automation and intelligent control.last we analysis performance advantage and prospect of friction-puming unit.Theorectical anslysis shows that,WCYJT12-6-5.4-Z friction-pumping unit is a simple structure,safe and reliable, maintence convenient,new energy-saving pumping unit,which stroke length and speed can be flexibly adjusted. This has important theoreticaland practical value for the development of domestic oilfield.