An underground hydraulic oil pumping system

Abstract

The invention provides an underground hydrodynamic oil pumping system. The underground hydrodynamic oil pumping system comprises a power system, an instruction system and a steering system which are arranged inside an oil pipe, wherein the power system is connected with an oil-well pump, a power liquid channel and a power-lacking liquid and well fluid mixing channel are arranged inside the oil pipe, the power system, the instruction system and the steering system are in such structures that pistons are arranged inside cylinders, a plurality of holes are formed in the cylinders of the instruction system and the steering system, concave blocks are arranged on the pistons correspondingly, and the direction of a power liquid is changed by the aid of corresponding position relations of the holes and the pistons. The underground hydrodynamic oil pumping system has the advantages that the whole system is achieved by the aid of the power liquid completely, and the soft steering is achieved, so that friction and energy losses caused by mechanical steering are eliminated, and the service life is long; all pipelines in the steering system are located inside the liquid, and pressures inside and outside the pipelines are balanced, so that deformations caused by changing of inside and outside pressure differences are avoided, and energy losses are reduced; thus, according to the technical scheme, the energy can be used for lifting to the maximum extent, and the system efficiency can be improved to over 50%.

Description

technical field [0001] The invention relates to a petroleum mining machine, in particular to a downhole rodless hydraulic power pumping system. Background technique [0002] There are two types of oil pumping in oil fields: rod extraction and rodless extraction. The most common type of extraction with rods is the pumping unit, which is the most common and the most efficient pumping method at present, but the energy utilization rate of existing equipment is only about 35%. ; In the case that some ground conditions are not available, the rodless oil production method will be selected, but there are also situations where the energy utilization rate is not high. The present invention mainly relates to the field of rodless oil recovery. In this technical field, how to improve the utilization rate of energy is the key point. The reversing system is the key point of the technology. The use of spacers has complex mechanical mechanisms, inconvenient maintenance, and most of them are...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the problems existing in the complex mechanical reversing system in the existing rodless hydraulic oil pumping system, and provide a device that relies on instructions, can achieve more precise control, has small energy loss, enhanced power, and at the same time has a simple structure and is easy to maintain. The downhole hydraulic power pumping system introduced the idea of ​​command and steering for the first time in this field

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