Long-stroke oil pumping unit with stack-up pull rods arranged on rear portion

Abstract

The invention discloses a long-stroke oil pumping unit with stack-up pull rods arranged on the rear portion. The long-stroke oil pumping unit comprises the triangular swing-frame-type pull rods; each triangular swing-frame-type pull is provided with a first pivot, a second pivot and a center pivot, and the first pivots and the second pivots can rotate by means of the method that the center pivots serve as the centers; each first pivot is movably installed on a rear arm of a walking beam, each second pivot is freely installed and connected with one end of a pulling rope, and each center pivot is movably connected to a tower frame through a top rod; the triangular swing-frame-type pull rods are installed on the rear arms of the walking beams, the stroke is effectively increased, the times of stroke is reduced, and the actual stroke length and the filling coefficient of an oil pump are increased; same electric energy is consumed by a motor, the oil pumping quantity of the oil pumping unit can be effectively increased, working efficiency of the oil pumping unit is improved, and the energy-saving and emission-reducing effects are achieved; and meanwhile the deep drawing stroke of the oil pumping unit is increased, so that the long-stroke oil pumping unit with the stack-up pull rods arranged on the rear portion is suitable for exploiting of different oil fields, and the universality of the oil pumping unit is increased.

Description

technical field [0001] The invention relates to the technical field of petroleum oil extraction machinery design, in particular to a post-stacked tie-rod long-stroke pumping unit. Background technique [0002] There are currently two types of pumping units in my country. The first type is beam pumping unit 13, and the second type is tower pumping unit. However, the current pumping units still have various problems and cannot meet various various environmental needs. The first type is the special-shaped beam pumping unit 13, also known as the double donkey head 11 pumping unit. The double donkey head 11 pumping unit can improve the balance of the oil pump during operation and reduce energy consumption, but its inertial load is too large As a result, the mechanical parts connected with the beam 13 are easily damaged, so they can only be used at a very low frequency; the starting torque of the front-mounted air-balanced pumping unit is reduced to a certain extent, the installed...

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Problems solved by technology

[0002] There are currently two types of pumping units in my country. The first type is beam pumping unit 13, and the second type is tower pumping unit. However, the current pumping units still have various problems and cannot meet various needs of various environments

The first type is the special-shaped beam pumping unit 13, also known as the double donkey head 11 pumping unit. The double donkey head 11 pumping unit can improve the balance of the oil pump during operation and reduce energy consumption, but its inertial load is too large As a result, the mechanical parts connected with the beam 13 are easily damaged, so they can only be used at a very low frequency; the starting torque of the front-mounted air-balanced pumping unit is reduced to a certain extent, the installed capacity is lower by a grade, and it is balanced when working. The conventional pumping unit is not easy to achieve the requirements of long stroke and low stroke frequency, so it cannot meet the requirements of heavy oil wells and deep pumping wells; the six-link 5-beam 13-type pumping unit is in the development and development stage, although It can overcome the shortcomings of the four-bar structure pumping unit, but the structure is relatively complicated and the stability is not high

The second category, such as the chain pumping unit, still has problems such as short chain life, large reversing impact load, and insufficient rigidity of the wire rope and easy deformation of the guide rail. The device level is restricted, prone to failure, low reliability, and difficult to maintain

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