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Bilayer separate injection process pipe column device for nonmetal continuous oil pipe

A process pipe string, non-metal technology, applied in drilling pipe, casing, production fluid, etc., can solve the problems of unguaranteed water injection volume, high risk of sticking and blocking in deployment, and large workload of layered water injection well deployment, etc. To achieve the effect of reduced labor intensity of personnel, good work reliability, and small workload

Active Publication Date: 2015-03-04
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problems in the prior art that the deployment workload of layered water injection wells is large, the deployment encounters a high risk of getting stuck, and the water injection volume cannot be guaranteed after deployment.

Method used

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  • Bilayer separate injection process pipe column device for nonmetal continuous oil pipe
  • Bilayer separate injection process pipe column device for nonmetal continuous oil pipe
  • Bilayer separate injection process pipe column device for nonmetal continuous oil pipe

Examples

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Effect test

Embodiment 1

[0025] In order to solve the problems in the prior art that the allocation workload of layered water injection wells is large, the risk of being stuck in allocation is high, and the water injection volume after allocation cannot be guaranteed, this embodiment provides a method such as figure 1 , 2 The non-metallic coiled tubing two-layer separate injection process string device shown includes a non-metallic coiled tubing 1, an injection volume adjustment device 2, a first water injection channel 3 and a Two water injection channels 4, the first water injection channel 3 and the second water injection channel 4 are provided with an injection volume adjustment device 2 at the beginning, and are connected to the injection volume adjustment device 2 through conversion joints. The injection rate regulating device 2 is composed of a wellhead flowmeter and a regulating needle valve. The non-metallic coiled tubing 1, the first water injection channel 3 and the second water injection c...

Embodiment 2

[0029] On the basis of embodiment 1, on-site installation and work process of the present invention are introduced:

[0030] Such as image 3 As shown, the non-metallic coiled tubing 1 is connected with the tubing hanger 15, the casing protection packer 8, and the reservoir packer 9 through a metal conversion joint, and the first water injection channel 3 and the second water injection channel 4 inside it are connected from The casing protection packer 8 and the interior of the reservoir packer 9 pass through. The non-metallic coiled tubing 1 is in contact with the casing head 13 through the tubing hanger 15 connected thereto, and is pressed against each other by the gravity of the pipe string to form a sealed annular space between the non-metallic coiled tubing 1 and the casing 14 . The first water injection channel 3 and the second water injection channel 4 are connected to the injection volume adjustment and metering device 2 through a conversion joint, and the injection v...

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Abstract

The invention belongs to the technical field of oil production technology in petroleum and natural gas industries, and particularly relates to a bilayer separate injection process pipe column device for a nonmetal continuous oil pipe. The bilayer separate injection process pipe column device comprises the nonmetal continuous oil pipe and injection quantity adjusting devices, a first water injection passage and a second water injection passage which are symmetric according to the center of the nonmetal continuous oil pipe are arranged in the nonmetal continuous oil pipe, the injection quantity adjusting devices are arranged at the starting ends of the first water injection passage and the second water injection passage respectively, and the first water injection passage and the second water injection passage are both connected with the injection quantity adjusting devices through adapters. By the bilayer separate injection process pipe column device, an original process of using a water distributor for layered water injection is replaced, so that anticorrosion and antiscaling effects are realized. Flow adjusting is performed on the ground, so that sundry downhole testing and adjusting work is omitted, downhole accidents occurring in the testing and adjusting work are eliminated, and effective injection quantity is guaranteed for each layer.

Description

technical field [0001] The invention belongs to the technical field of oil recovery technology in the petroleum and natural gas industry, and in particular relates to a non-metal coiled tubing two-layer separate injection process string device. Background technique [0002] In order to make up for the drop in formation pressure and energy loss caused by oilfield development and production, methods such as water (gas) injection are needed to replenish underground energy to achieve energy balance and maintain formation pressure. In order to maintain a good pressure level in each production layer, it is necessary to inject different amounts of water into each small layer with different permeability and pressure to achieve a balanced oil displacement efficiency and recovery degree. The most widely used in heterogeneous multi-reservoir production is layered water injection technology, and a variety of water injection technology and special supporting tools have been formed. In p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/14E21B43/20E21B17/00
CPCE21B17/00E21B43/14E21B43/20
Inventor 胡美艳杨海恩唐凡张荣杨棠英张涛
Owner PETROCHINA CO LTD
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