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Hydraulic oil pumping unit for inclined well

A hydraulic and oil pumping technology, which is applied in wellbore/well components, liquid displacement machinery, production fluid, etc., can solve the problems of reduced oil well production timeliness, affecting oil well production efficiency, and rarely used, etc., to achieve extended pump inspection Cycle, simple structure, and the effect of reducing the number of times and time

Inactive Publication Date: 2007-12-19
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Frequent pump inspection operations greatly reduce the production timeliness of the oil well, which directly affects the production efficiency of the oil well
Although there are some hydraulic piston pumps in the oil field, their efficiency is low, the highest is only 25%. Because of many technical and economic problems, they are rarely used at present.

Method used

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  • Hydraulic oil pumping unit for inclined well

Examples

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Effect test

Embodiment Construction

[0008] The power pump 2 is a manual variable hydraulic pump, which is connected with the motor 3 through a coupling. The power pump 2 communicates with the oil tank 1 through pipelines, valves and heat exchangers. The outlet of the power pump 2 is connected to the inlet P of the electro-hydraulic reversing valve 8 through the No. 2 pipeline 6. A check valve is installed on the No. 2 pipeline 6 . No. 1 energy converter 18 and No. 2 energy converter 19 adopt ZL01278477 patent technology. The outlet A of the electro-hydraulic reversing valve 8 is connected with the lower port of the No. 2 energy converter 19 through the No. 4 pipeline 12 and connected with the upper port of the No. 1 energy converter 18 through the No. 6 pipeline 14 . The inlet B of the electro-hydraulic reversing valve 8 is connected to the upper port of the No. 2 energy converter 19 through the No. 5 pipeline 13 , and is connected with the lower port of the No. 1 energy converter 18 through the No. 7 pipeline 1...

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Abstract

The hydraulic oil pumping unit for inclined well as one hydraulic power set features that the driving pump is connected to the electro-hydraulic changeover valve and has outlet connected with energy converter to constitute hydraulic power system, the energy converter is connected with the well and the small oil pipe to constitute hydraulically driven converting pipeline, the approach switch is connected to the pressure relay and the electro-hydraulic conversion valve to constitute the pressure controlled automatic changeover device, and the liquid compensating valve connected with the oil-water separator, the energy accumulator and the pressure stabilizer constitute the automatic driving liquid compensating system. The present invention can protect oil pipe against damage, prolong the pump overhaul period, raise oil producing efficiency, lower cost, etc. and is especially suitable for inclined oil well with greater inclination.

Description

technical field [0001] The invention relates to a hydraulic power device for oil exploitation. Background technique [0002] At present, the equipment for underground oil exploitation in oil fields is mainly based on the rod pump. This rod pump device is driven by the surface beam pumping unit through the sucker rod to reciprocate the downhole pump to lift the liquid produced in the formation to the ground. This pumping method is used in a vertical wellbore, and the eccentric wear between the sucker rod and the tubing is not obvious. If it is used in an inclined wellbore, the eccentric wear between the sucker rod and the tubing will follow the wellbore The slope increases and aggravates. According to data statistics, the sucker rod breakage accident caused by eccentric wear has reached more than 30% of the oil well pump inspection workload. The eccentric wear of the sucker rod in this kind of inclined well, on the one hand, increases the workload of the pump inspection ope...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B47/04F04B9/10E21B43/00
Inventor 陈成才马洪宇吕志典
Owner PETROCHINA CO LTD
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