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Method and device for reversely cyclically producing and lifting pump core of hydraulic jet pump

A hydraulic injection and reverse circulation technology, applied in jet pumps, wellbore/well valve devices, pumps, etc., can solve problems such as increased production costs, troublesome site management and operations, and increased operating costs

Active Publication Date: 2014-07-02
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such problems include (1) the complex structure of the downhole tubing string, which increases the workload of the operation, increases the operating cost, and increases the production cost; Small casing and casing-changing wells are not suitable, so the adaptability is narrow; (3) During positive and negative circulation production, it is necessary to change the direction of the power fluid on the outer runner working cylinder, which brings troubles to site management and operation

Method used

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  • Method and device for reversely cyclically producing and lifting pump core of hydraulic jet pump
  • Method and device for reversely cyclically producing and lifting pump core of hydraulic jet pump
  • Method and device for reversely cyclically producing and lifting pump core of hydraulic jet pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A pump core device of a reverse circulation production and reverse circulation hydraulic jet pump, which is characterized in that it contains a pump core and a work cylinder;

[0046] 2. The structure of the pump core and working cylinder:

[0047] (1) Pump core:

[0048] There is a fishing head body 1 from top to bottom: the upper 1 / 3 of the fishing head body 1 is a solid rod with an outer diameter of 20mm, the top is a fishing head, and the section of the middle 1 / 3 part is a 52mmx52mm quadrilateral, and the four sides face the center Drill four holes obliquely, the lower 1 / 3 is cylindrical with a diameter of 52mm, the inner part is a long hole with a diameter of 30mm and communicates with the four oblique holes in the middle and upper part, and the lower end of the inner hole is an internal thread;

[0049] Pump rubber cylinder 3: It is made of oil-resistant rubber, and the maximum outer diameter is 60mm. It is a tapered rubber cylinder with a central through hole, ...

Embodiment 2

[0076] A method of reverse circulation production and reverse circulation hydraulic jet pump pump core, using reverse circulation, that is, the power fluid is injected from the casing, and the formation fluid is returned to the ground from the oil pipe to be transported out; the ground water injection pipe network is used as the power fluid, After flowing through the nozzle, it forms a high-speed jet with the formation fluid, passes through the diffusion zone of the throat pipe, and then enters the upper oil pipe of the pump.

[0077] Including the steps of running the pipe string in the casing, lowering the pump core, reverse circulation production and reverse circulation pump core;

[0078] Step A. Run the pipe string in the casing: the pipe string structure is from bottom to top: 2 7 / 8 "Oil pipe plus dead plug, liquid inlet screen, 2 7 / 8 "Oil pipe, check valve, packer, safety joint, work cylinder for reverse circulation (washing) pump core during reverse circulation,...

Embodiment 3

[0084] A reverse circulation production and reverse circulation hydraulic jet pump pump core method, including the steps of running a pipe string in the casing, lowering the pump core, reverse circulation production and reverse circulation pump core;

[0085] Taking a reverse circulation production and reverse circulation method for the pump core of a hydraulic jet pump as an example, the present invention is further described in detail:

[0086] E.g:

[0087] (1) Geological requirements for a well:

[0088] ①The production section of this well is long (141.01m), and the fluid volume is lower than that of adjacent wells. The well’s daily fluid production: 18.7m3, and daily oil production: 6.2t. One adjacent well: daily liquid production: 61.4m3, daily oil production: 32.1t, another adjacent well: daily liquid production: 42m3, daily oil production: 8.5t.

[0089] ② It is recommended to implement acid washing to remove plugging of the well. A section of acidified sand has 12...

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Abstract

The invention discloses a method and a device for reversely cyclically producing and lifting a pump core of a hydraulic jet pump and belongs to the technical field of oil recovery in the oil field. The method is characterized by adopting reverse circulation, that is, pumping into hydraulic liquid from a casing pipe and returning to be output on the ground from an oil pipe together with stratum liquid; adopting a ground water injection net as power liquid, enabling the power liquid to flow through a nozzle and form high-speed jet flow together with the stratum liquid, and enabling the high-speed jet flow to pass a venturi pipe diffusion zone and enter an on-pump oil pipe. The method for reversely cyclically producing and lifting the pump core of the hydraulic jet pump effectively solves the problems that sand flow forms on the stratum, annular spaces of the oil pipes and the casing pipes are large, flow velocity is slow to cause sand deposition, jamming of a packer by wax precipitation and oil pipe blockage of highly-deviated wells and horizontal wells and finally cause overhauling of the wells, risk in overhauling and abandonment of the wells is reduced, and application range of the hydraulic jet pump is enlarged. The method has no demand for any extra tools to lift and lay down the pump core, only needs to repeat procedures above, and the pump core can be backwashed out immediately by vertically moving in a working barrel.

Description

technical field [0001] The invention discloses a reverse circulation production and reverse circulation pump core method and device of a hydraulic jet pump, belonging to the technical field of oil field production. Background technique [0002] At present, with the continuous development of oil fields, the number of highly deviated and horizontal wells increases, and the conventional rod production technology is no longer suitable. To meet the needs of development and production, only rodless oil production techniques can be used, such as electric submersible pumps, submersible screw pumps, hydraulic jet pumps, hydraulic piston pumps, etc. However, due to the short inspection period of the submersible screw pump and the frequent lifting of the pump core by the hydraulic piston pump, these two types of pumps are rarely used, and most of the highly inclined and horizontal wells in oil fields are produced by electric submersible pumps or hydraulic jet pumps. However, due to re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04F5/10F04F5/44E21B17/02E21B33/03E21B34/02
Inventor 徐国安刘树高周俊杰刘树新王存博狄鹏
Owner PETROCHINA CO LTD
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