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Subsection releasing downhole tool with thermodynamics partition boards

A downhole tool and thermodynamic technology, applied in the direction of cleaning equipment, wellbore/well parts, earthwork drilling and production, etc., can solve the problems of oil well wax deposition, scaling, corrosion, complicated operation, poor effect, etc., and extend the pump inspection cycle , Guarantee the effect of the medicine and prolong the effect of the action time

Active Publication Date: 2015-10-07
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the existing problems of incomplete cleaning, complicated operation, short action time and poor effect of cleaning oil wells when removing wax deposits, scaling, and corrosion in oil wells.

Method used

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  • Subsection releasing downhole tool with thermodynamics partition boards
  • Subsection releasing downhole tool with thermodynamics partition boards
  • Subsection releasing downhole tool with thermodynamics partition boards

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Such as figure 1 As shown, the present invention provides a segmented release downhole tool with a thermodynamic partition, which includes a working outer cylinder 1, and a plurality of thermodynamic partitions 2 are arranged at equidistant intervals from top to bottom in the working outer cylinder 1, and the thermodynamic partitions 2 is in sealing contact with the inner wall of the working outer cylinder 1 in the radial direction, and a solid chemical block 3 placed on the upper surface of the lower thermodynamic partition 2 is provided between adjacent thermodynamic partitions 2 .

[0035] After the thermodynamic partition 2 reacts with water for a certain period of time to release heat and dissolve the thermodynamic partition 2, the solid chemical block 3 loses the support of the thermodynamic partition 2, and under the action of gravity, the solid chemical block 3 falls into the bottom of the well and contacts the liquid. The slow release works its chemistry.

[0...

Embodiment 2

[0039] On the basis of Example 1, it should be noted that, as figure 2 As shown, the thermodynamic separator 2 is composed of a double-layer porous skeleton plate 6 and a thermodynamic erosion support 5 inside the double-layer porous skeleton plate 6 .

[0040] The thermodynamic erosion support 5 is used to support the solid chemical block 3 on the double-layer porous skeleton plate 6. After the thermodynamic separator 2 reacts with water for a certain period of time to release heat and dissolve the double-layer porous skeleton plate 6, the thermodynamic erosion support 5 contacts with water And dissolve, the solid chemical block 3 loses the supporting effect of the thermodynamic corrosion support 5, and under the action of gravity, the solid chemical block 3 falls into the bottom of the well and contacts with the liquid, and releases slowly to exert its chemical effect.

Embodiment 3

[0042] On the basis of Example 2, such as figure 2 As shown, the double-layer porous skeleton board 6 is composed of an upper porous skeleton board 601 and a lower porous skeleton board 602, the upper porous skeleton board 601 and the lower porous skeleton board 602 are connected by physical pressing or adhesive, and the upper porous skeleton board The plate 601 is composed of a network structure formed by vertically and horizontally intersecting support plates 4, the lower porous skeleton plate 602 is composed of a plurality of support plates 4 that are inclined and placed parallel to each other, and the solid chemical block 3 is placed on the upper porous skeleton plate 601. surface. Such as image 3 As shown, the thermodynamic erosion support 5 is composed of a plurality of support frames 501 and connectors 502 arranged at equal intervals, one end of each support frame 501 is fixedly connected to the connector 502, and the other end is fixed to the inner wall of the worki...

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Abstract

The invention provides a subsection releasing downhole tool with thermodynamics partition boards. The subsection releasing downhole tool with the thermodynamics partition boards comprises an outer working barrel, solid state chemistry blocks and the thermodynamics partition boards. The multiple thermodynamics partition boards are arranged inside the outer working barrel from top to bottom at equal intervals. The thermodynamics partition boards are in sealed contact with the inner wall of the outer working barrel in the radial direction. Each solid state chemistry block is arranged between every two thermodynamics partition boards and is arranged on the upper surface of the lower thermodynamics partition board. According to the subsection releasing downhole tool with the thermodynamics partition boards, the number of the solid state chemistry blocks can be confirmed through the oil well liquid amount and the agent adding concentration, by controlling the dissolution rate of the thermodynamics partition boards, the solid state chemistry blocks are dissolute and released in a sectional mode, the acting time of an agent is prolonged, the agent effect is guaranteed, the oil well malfunction caused by the reasons such as the corrosion, scaling and waxing is controlled, and the oil well pump detecting cycle is prolonged.

Description

technical field [0001] The invention belongs to the technical field of oil recovery in oil fields, and in particular relates to a segmented release downhole tool with a thermodynamic partition. Background technique [0002] Problems such as wax deposition, scaling, corrosion, pump sticking, corrosion and breakage of pipes and rods in oil wells are common, and have become important factors affecting the stable production of oil fields. At present, for problems such as wax deposition, scaling, and corrosion in oil wells, the oil casing ring is air-dropped with chemicals and downhole supporting tools. [0003] In general, it is difficult to add chemicals in the oil casing annulus on time and according to the amount. Some oil wells implement isolation production or control casing pressure production, and it is difficult to add drugs to reach the effective part of the downhole, which affects the use effect of the drugs. [0004] The downhole tools are mainly drip dosing devices ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B37/06
Inventor 李琼玮张鑫柱程碧海朱方辉董晓焕刘伟李明星奚运涛孙雨来付彩利
Owner PETROCHINA CO LTD
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