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Oil extraction method of weight adding under pump and oil well pump with weight adding under pump

An oil pump and weighted rod technology, which is applied in the direction of pump, production of fluid, earthwork drilling, etc., can solve the problems of leakage, wear and tear of the oil pipe on the pump, and poor performance, so as to prolong the service life, reduce mutual wear, and reduce eccentric wear. Effect

Inactive Publication Date: 2013-07-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the heavy weight on the pump, the weighted rod wears the oil pipe on the pump seriously, and leakage occurs, and the effect is not good

Method used

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  • Oil extraction method of weight adding under pump and oil well pump with weight adding under pump
  • Oil extraction method of weight adding under pump and oil well pump with weight adding under pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] An under-pump weighted oil well pump used for an under-pump weighted oil production method includes a pump barrel assembly, a plunger assembly and an auxiliary mechanism under the pump. The plunger assembly is provided with a liquid outlet valve and a liquid inlet valve. The upper plunger 10 and The lower plunger 16 is connected with the connecting rod 12 through the lower plunger joint 11, and the weighting rod 18 is connected under the plunger assembly. The weighted rod 18 is connected with the lower plunger 16 of the plunger assembly through a weighted rod joint 26 . Connect the auxiliary mechanism under the pump under the pump barrel assembly. The auxiliary mechanism under the pump includes the tail pipe joint 19, the tail pipe 20, the screen pipe 21 and the plug 22 connected in sequence. The connection between the tail pipe joint 19 and the pump barrel assembly The lower pump barrel 17 is connected. The liquid inlet valve includes a pump external offset liquid inl...

Embodiment 2

[0023] The under-pump weighted oil well pump used for an under-pump weighted oil production method includes a pump barrel assembly, a plunger assembly and an auxiliary mechanism under the pump. The plunger assembly is provided with a liquid outlet valve and a liquid inlet valve, and the weight rod 18 is connected to Under the plunger assembly, connect the pump down auxiliary mechanism under the pump barrel assembly. The weighted rod 18 is connected with the connecting rod 23 of the plunger assembly through a weighted rod joint 26 . The auxiliary mechanism under the pump includes a tailpipe 20 and a plug 22 to connect the tailpipe 20 with the lower joint 15 of the pump. The liquid outlet valve includes an upper joint 6 on the plunger, an upper sealing seat 24 on the plunger and a lower sealing seat 25 on the plunger. The upper sealing seat 24 of the plunger is connected sequentially; the lower sealing seat 25 of the plunger is fixed on the lower part of the connecting rod 23, ...

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Abstract

The invention discloses an oil extraction method of weight adding under a pump and an oil well pump with weight adding under the pump, used in pumping units and oil pumped wells in the petroleum industry. In the oil extraction method of weight adding under the pump, a weight adding bar is connected under an oil well pump plunger assembly to reduce the bend and the deformation of a pumping rod string. The oil well pump with weight adding under the pump comprises a pump cylinder assembly, the plunger assembly and an auxiliary mechanism under the pump. The plunger assembly is provided with a liquid outlet valve and a liquid inlet pump, an upper plunger and a lower plunger are connected with a connection bar through a plunger lower joint to connect the weight adding bar under the plunger assembly. The method uses the liquid inlet valve with an offset structure outside the pump while adding weight under the pump, thereby lightening the eccentric wear of pipes and bars and reducing the stroke loss. Due to the weight adding bar arranged under the pump, the pumping rod is kept in the straightening state all the time under the action of gravity, thereby lightening the mutual abrasion of the pipes and the bars. The weight adding under the pump can reduce the elastic bending and deformation of the pumping bar string, thereby reducing the stroke loss and enhancing the filling factor of the oil well pump.

Description

technical field [0001] The invention relates to the oil extraction technology of the petroleum industry, in particular to an under-pump heavy oil extraction method and an under-pump heavy oil well pump, which are used in pumping unit oil production wells. Background technique [0002] At present, the tubular pumps of rod well pumps used in oil wells of pumping units can be divided into two categories. The oil well pumps designed and manufactured in accordance with the oil well pump standards are called conventional oil well pumps. Heavy oil pumps are called special oil well pumps. The advantages of these two types of pumps are different, but the disadvantages are similar. It is mainly manifested in three aspects: one is that the resistance of the descending plunger is too large, which increases the deformation of the rod column and the partial wear of the pipe rod; the other is that the plunger descends slowly and has a certain damping phenomenon, which affects the filling ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/00F04B47/00
Inventor 吴吉林杨峰王庆王德山刘小波吴国斌杨晓莹董瑞邱建彬肖会曹立平
Owner CHINA PETROLEUM & CHEM CORP
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