Intelligent underground layered well test injection allocator and flow automatic control and test system

An intelligent well and dispenser technology, applied in wellbore/well components, measurement, and production of fluids, etc., can solve the problem that the layered dynamic data cannot be monitored in real time, the complex artificial running and tripping work, waste of manpower, material resources and other problems. Time and other issues, to achieve the effect of saving manpower, smooth and scientific water injection, and reducing workload

Pending Publication Date: 2019-02-22
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing technology needs to install different instruments at different stages, and at each stage, the instruments must be manually lifted and lowered for downhole operations to achieve testing and control, which wastes manpower, material resources and time; in addition, the layered dynamic data cannot be monitored in real time, so As a result, manual and complex loading and unloading work at each stage is caused, with heavy workload, long process and high cost

Method used

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  • Intelligent underground layered well test injection allocator and flow automatic control and test system
  • Intelligent underground layered well test injection allocator and flow automatic control and test system
  • Intelligent underground layered well test injection allocator and flow automatic control and test system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] An intelligent downhole layered well test dispenser includes a work cylinder 31, an overflow pipe 2 sleeved in the work cylinder 31, and an upper joint 1 and a lower joint 3 respectively connected to the two ends of the work cylinder 31, The working barrel 31, the overflow pipe 2, the upper joint 1 and the lower joint 3 form an annular sealed cavity; the annular sealed cavity is provided with a flow meter 9, a self-control water nozzle 6, a well test test nipple 5, a control storage The module 8 and the battery unit 7, the water inlet 29 of the self-control water nozzle 6 is connected to the overflow pipe 2, and one end of the water outlet 30 of the self-control water nozzle 6 extends into the upper joint 1 and is connected externally with the upper joint 1 through the upper joint 1, and the water inlet 29 A flow meter 9 is set between the water outlet 30; the upper joint 1 is connected with a well test sub-joint 5; the lower joint 3 is connected with a battery unit 7 an...

Embodiment 2

[0041] On the basis of Embodiment 1, the self-control water nozzle 6 also includes a flow control valve, a connecting rod 26, and a flow control cavity between the water inlet 29 and the water outlet 30. The flow control valve is composed of a valve sleeve 23 and a valve The valve sleeve 23 of the flow control valve in the flow control cavity is fixed on the inner wall of the flow control cavity, the valve core 24 of the flow control valve is connected to one end of the connecting rod 26, and the other end of the connecting rod 26 One end has a ball screw assembly 25 and a driving motor 22, and the connecting rod 26 is coaxially connected with the driving motor 22 through the ball screw assembly 25. When the driving motor 22 stretches out the connecting rod 26 through the ball screw assembly 25, the control The flow control valve in the flow chamber is opened, and the water inlet 29 and the water outlet 30 are connected; when the drive motor 22 retracts the connecting rod 26 th...

Embodiment 3

[0047] On the basis of Embodiment 2, the ball screw assembly 25 includes a ball screw pair and a rail groove 36 for radially fixing and axially sliding nuts of the ball screw pair, when the ball screw pair When the lead screw rotates, the nut of the ball screw pair slides axially along the guide rail groove 36; one end of the nut extends to form an inner cavity for the lead screw to fully penetrate into the nut, and the nut One end of the extension is connected with the connecting rod 26, and the other end of the nut is connected with the lead screw; the lead screw is connected with the drive motor 22 by coaxial transmission, and the guide rail groove 36 is parallel to the motor shaft of the drive motor 22, so The guide rail groove 36 and the drive motor 22 are relatively fixed.

[0048] In this example, if image 3 , Figure 4 As shown, the ball screw assembly 25 is a set that converts the rotational power of the motor into a fine linear motion that advances and retracts al...

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Abstract

The invention provides an intelligent underground layered well test injection allocator and a flow automatic control and test system, belonging to the technical field of water flooding development ofan oil field; a water inlet of a self-control water nozzle is connected with an overflowing pipe; one end of a water outlet of the self-control water nozzle extends in an upper joint and is connectedwith the outside of the upper joint by the upper joint; a flowmeter is arranged between the water inlet and the water outlet; a well test short joint capable of monitoring and obtaining the external pressure of the upper joint and calculating and obtaining the needed flow of the water nozzle is connected with the upper joint; a control storage module for obtaining the data of the well test short joint and controlling the aperture of the self-control water nozzle and a cell unit are connected with a lower joint; and the control storage module is respectively and electrically connected with thecell unit, the flowmeter, the well test short joint and the self-control water nozzle.

Description

technical field [0001] The invention relates to the technical field of oilfield water injection development, in particular to an intelligent downhole layered well testing injector and an automatic flow control and testing system. Background technique [0002] Most domestic oilfields adopt water injection development, and it is considered that water injection development is the most economical and effective technical means. At present, most oilfields adopt mechanical layered water injection techniques such as bridge eccentric and bridge concentric. This method is highly dependent on personnel, and the whole process requires long-term manual operations. The flow control of layers is mostly based on water injection dynamics and empirical analysis. The stratified flow index is given, and the stratified flow control is completed through manual work. [0003] At present, the operation of water injection wells generally requires three stages of testing, regulation, and water injec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/20E21B47/00
CPCE21B43/20E21B47/00
Inventor 杨玲智陆红军姚斌姬振宁于九政毕福伟胡改星王子建刘延青
Owner PETROCHINA CO LTD
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