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Concentric constant-flow integrated water distributor and using method thereof

A technology of water distributor and constant flow, which is applied in the direction of mining fluid, earthwork drilling, surveying, etc., and can solve the problem that there is no automatic adjustment, the qualification rate of layered water injection cannot be kept at a high level for a long time, and the amount of layered water cannot meet the injection requirements and other issues to achieve the effect of extending the validity period and improving the effect

Pending Publication Date: 2020-01-14
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the continuous advancement of reservoir development, new requirements are constantly put forward for the separate injection process to improve the oilfield development effect. The most important thing is to keep the pass rate of separate injection at a high level. Nozzle, after adjusting the opening of the nozzle in the process of manual measurement and adjustment, it does not have an automatic adjustment function. Therefore, when the ground water injection pressure fluctuates and the opening of the nozzle remains unchanged, the layered flow rate changes to varying degrees. As a result, the volume of stratified water cannot meet the allocation requirements, and the pass rate of stratified water injection cannot remain at a high level for a long time

Method used

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  • Concentric constant-flow integrated water distributor and using method thereof

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Effect test

Embodiment 1

[0038] This implementation provides a concentric constant flow integrated water distributor, including an upper joint 1, an upper sleeve 3, an intermediate connecting cylinder 9, a lower joint 13 and a constant current mechanism, the upper joint 1, the upper sleeve 3, the intermediate connection The cylinder 9 and the lower joint 13 are connected sequentially from top to bottom and form a central channel inside. The upper joint 1 is provided with an upper sleeve attachment 2, the upper sleeve 3 is provided with a fixed shaft 4, and the middle connecting cylinder 9 is provided with upper pressure cap 5, intermediate joint 6, lower pressure cap 7 and lower support body 23 successively from top to bottom. An overflow hole is provided to form an overflow channel, and the intermediate connecting cylinder 9 is provided with a water injection port 24;

[0039] The constant current mechanism includes an overcurrent and constant pressure part and a regulating valve, the overcurrent and...

Embodiment 2

[0044] On the basis of Embodiment 1, this embodiment provides a concentric constant flow integrated water distributor, the regulating valve includes a valve cylinder 15, a valve stem 16, a valve cylinder 2 17, a valve seat 18, and a valve cylinder 3 19. Valve seat two 20, valve cylinder four 21 and pressure regulating spring 22, the upper end of the valve cylinder one 15 is pressed by the upper pressure cap 5, the lower end is connected to the valve cylinder two 17, and the lower end of the valve cylinder two 17 is connected Valve seat one 18, the lower end of valve seat one 18 is connected to valve cylinder three 19, the water outlet is arranged on valve cylinder three 19, the lower end of valve cylinder three 19 is connected to valve seat two 20, the lower end of valve seat two 20 is connected to valve cylinder four 21, The pressure regulating spring 22 is installed inside the valve cylinder 21;

[0045] Described valve rod 16 passes through valve cylinder one 15, valve cylind...

Embodiment 3

[0052] On the basis of Embodiment 1, this embodiment provides a concentric constant-flow integrated water distributor, the socket attachment is set inside the upper joint 1 , and the lower end is supported on the upper section of the upper sleeve 3 .

[0053] Realize the guidance and righting function of the integrated test and adjustment instrument in the process of measurement and adjustment.

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Abstract

The invention provides a concentric constant-flow integrated water distributor and a using method thereof. The water distributor comprises an upper joint, an upper sleeve, an intermediate connecting cylinder, a lower joint and a constant flow mechanism, wherein the upper Joint, the upper sleeve, the intermediate connecting cylinder and the lower joint are sequentially arranged from top to bottom and internally form a center channel, an upper connecting cylinder accessory is arranged in the upper joint, a fixing shaft is arranged in the upper sleeve, an upper pressing cap, a middle joint, a lower pressing cap and a lower supporting body are sequentially arranged in the intermediate connecting cylinder from top to bottom, the upper pressing cap, the middle joint, the lower pressing cap and the lower supporting body are provided with flow through holes to form a flow through channel, and a water filling port is formed in the intermediate connecting cylinder. According to the water distributor, a underground constant-flow water distribution mechanism is integrated, the mechanism has an automatic water volume adjusting function, when the ground water injection pressure is changed, the underground constant-flow water distribution mechanism automatically adjusts the opening degree of a water nozzle, and the layered flow change amount caused by pressure change is weakened, so that theeffective period of the layered water injection qualification rate is prolonged, and the water injection development effect is improved.

Description

technical field [0001] The invention belongs to the technical field of fine water injection in oil fields, and in particular relates to a concentric constant-flow integrated water distributor and a use method thereof. Background technique [0002] Aiming at the problems of directional wells and small water volume in Changqing Low Permeability Oilfield’s layered water injection, Changqing Oilfield has independently developed a bridge-type concentric layered water injection technology, which realizes the functions of concentric docking of separate injection wells, simultaneous measurement and adjustment, etc. Improve the success rate and test accuracy of directional well logging and adjustment. [0003] With the continuous advancement of reservoir development, new requirements are constantly put forward for the separate injection process to improve the oilfield development effect. The most important thing is to keep the pass rate of separate injection at a high level. Nozzle,...

Claims

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Application Information

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IPC IPC(8): E21B43/20E21B47/06
CPCE21B43/20E21B47/06
Inventor 杨玲智胡改星王子建刘延青于九政王守虎毕福伟靳福广
Owner PETROCHINA CO LTD