Stroke adjustable energy-saving hydraulic pumping unit

Abstract

The invention relates to an energy-saving hydraulic oil pumping unit with adjustable stroke used in oil field, comprising frame, gear group, hydraulic transmission mechanism, rack, head sheave, suspended-weight rope and oil pumping bar. Two frames are set at two sides of hydraulic transmission mechanism symmetrically. A gear group and two head sheaves are set on each frame. Two gear groups are mated with racks set at two ends of hydraulic transmission mechanism respectively. The gear group draws the oil pumping bar through the suspended-weight rope and the head sheave. Thereinto, the hydraulic transmission mechanism comprises communicating vessel, piston and hydraulic pump. A hydraulic pump is fixed in the communicating vessel and two pistons are set in cavities at two ends of communicating vessel respectively. Driving liquid is poured between two pistons in cavities of communicating vessel. The invention is provided with simple structure, scientific and reasonable design, adjustable stroke and punching time, convenient maintenance, dismounting and use, safe operation, high liquid production volume, little energy consumption and low operating cost. It is also provided with higher innovation.

Description

technical field [0001] The invention relates to a pumping unit used in an oil field, in particular to an energy-saving hydraulic pumping unit with adjustable stroke. Background technique [0002] The method of extracting oil from the formation is mainly divided into two categories: one is to use the energy of the formation itself to lift crude oil, which is called the self-spraying oil recovery method; the other is to artificially use mechanical equipment due to the lack of energy of the formation itself. Adding energy to the liquid in the well to lift crude oil to the ground is called artificial lift oil recovery or mechanical oil recovery. Pumping unit (commonly known as knocking machine) is a necessary mechanical equipment in mechanical oil recovery. The oil deeply hidden in the ground (or seabed) is pumped out through the oil pumping pipe by means of a pumping unit, so each crude oil production well needs at least one pumping unit. The working principle of the pumping u...

AI Technical Summary

Problems solved by technology

At present, the pumping units used in oil extraction operations mainly include two types of beam pumping units and linear pumping units. The beam pumping units are the most widely used, and they mainly have the following defects in the working process: 1. The stroke is not adjustable , the oil pumping rate is low; 2. The entire equipment needs to be installed with tons of sliders and cranks, and the transportation and installation costs are high; 3. The installation and maintenance of the entire equipment is cumbersome, time-consuming and laborious; 4. Poor safety; 5. Low oil production efficiency

There are also a few oil fields that use linear pumping units. The disadvantages are that the motor power is too large, the energy consumption is high, and the operating cost is high.

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