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Oil-water well underground chemical agent controlling and releasing device and control method

A technology of controlled release and control method, which is applied in the field of controlled release devices for downhole chemicals in oil and water wells, can solve the problems of high one-time input, frequent chemical injection, reliability impact, etc. high coefficient effect

Active Publication Date: 2021-02-23
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the main problems of the above-mentioned technologies are as follows: 1. Manual injection or wellhead injection is often caused by the production of the wellbore with the production fluid just after the chemical agent is injected into the wellbore.
2. Manual filling is labor-intensive, and the daily filling of chemical agents is frequent (generally 10-30 days / time), and is affected by special weather such as rain and snow, making management difficult
The amount of supporting equipment is large, and the one-time investment is high, and the effect is affected by the reliability of ground equipment and electrical components
4. For oil-water wells with high gasoline ratio and high annular pressure, special high-pressure filling pumps and high-pressure pipelines are used for filling, which poses safety risks

Method used

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  • Oil-water well underground chemical agent controlling and releasing device and control method
  • Oil-water well underground chemical agent controlling and releasing device and control method
  • Oil-water well underground chemical agent controlling and releasing device and control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] refer to figure 1 , an oil and water well downhole drug control release device, at least including a first drug storage sub-joint 8 and a second drug storage sub-joint 9, the first drug storage sub-joint 8 and the second drug storage sub-joint 9 are both along the middle of the length direction A through hole is opened, one end of the first drug storage short joint 8 is connected to one end of the second drug storage short joint 9, and the connection between one end of the first drug storage short joint 8 and one end of the second drug storage short joint 9 A soluble partition 7 is also arranged between the end faces, and the through-hole cavity inside the first drug storage nipple 8 above the soluble partition 7 is the drug storage chamber 2 .

[0039] In the above-mentioned embodiment, when lowering the controlled drug release device, the required drug is first added to the drug storage cavity 2 in the first drug storage joint 8 located above, and then the entire firs...

Embodiment 2

[0041] refer to figure 1 , Further, an energy storage mechanism is provided above the soluble partition 7, and a fixed limit ring 5 is provided above the energy storage mechanism.

[0042] Further, the energy storage mechanism is a ring structure, and the outer diameter of the energy storage mechanism of the ring structure is equal to the diameter of the through hole in the middle of the first medicine storage short joint 8 and the second medicine storage joint 9, and the fixed limit The ring 5 is a conical ring, its conical surface is set towards the direction of the energy storage mechanism, and the outer diameter of the conical ring is 3-5mm larger than the diameter of the through hole in the middle of the first drug storage sub-joint 8 and the second drug storage sub-joint 9 .

[0043] In the above-mentioned embodiment above the soluble partition 7, the lower end of the first drug storage nipple 8 is provided with an energy storage mechanism in contact with the top of the ...

Embodiment 3

[0046] Further, refer to figure 1 and figure 2 , the first drug storage sub-section 8 and the second drug storage sub-section 9 are both circular cylindrical structures, and one end of the first drug storage sub-section 8 and the second drug storage sub-section 9 is provided with internal threads The first connecting head 4 of the first drug storage joint 8 and the other end of the second drug storage short joint 9 are provided with a second connecting head 3 which is an external thread, and the first connecting head 4 and the second connecting head 3 are both It communicates with the through hole in the middle of the first drug storage short joint 8 and the second drug storage short joint 9, the second connection head 3 of the first drug storage short joint 8 and the first connection head of the second drug storage short joint 9 4 threaded connections.

[0047] In the above-mentioned embodiment, the first drug storage sub-section 8 and the second drug storage sub-joint 9 a...

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Abstract

The invention relates to the technical field of oil exploitation, in particular to an oil-water well underground chemical agent controlling and releasing device and a control method. Through holes areformed in the middles of a first chemical agent storage short section and a second chemical agent storage short section in the length direction, one end of the first chemical agent storage short section is connected to one end of the second chemical agent storage short section, a soluble partition plate is further arranged between the end faces of the joint of one end of the first chemical agentstorage short section and one end of the second chemical agent storage short section, and a through hole cavity, above the soluble partition plate, in the first chemical agent storage short section isa chemical agent storage cavity. According to the oil-water well underground chemical agent controlling and releasing device and the control method, the first chemical agent storage short section andthe second chemical agent storage short section can be made by adopting oil pipes, the lengths of the first chemical agent storage short section and the second chemical agent storage short section can be adjusted or the first chemical agent storage short section and the second chemical agent storage short section are lengthened in a threaded connection mode according to the using amount of the chemical agent, and chemical agent feeding at the corresponding underground positions is achieved, the underground chemical agent controlling and releasing device can achieve one-time chemical agent feeding, chemical agent feeding is convenient and controllable, manual feeding is small, and the safety coefficient is high.

Description

technical field [0001] The invention relates to the technical field of petroleum exploitation, in particular to an oil-water well downhole drug control release device and a control method. Background technique [0002] In oil field development, oil-water wells are the most important production facilities in the water injection production development model. Due to the original colloid, wax, CO2, H2S bacteria and other corrosive components in the production medium, as well as high salinity formation water, etc., Under the downhole pressure and temperature environment, it is very easy to cause corrosion damage to the carbon steel tubing and casing, or to form scaling and wax clogging in the tubing and casing, causing the oil and water wells to stop production, increasing the workload of maintenance operations, and affecting the normal operation of the oil and water wells Production. [0003] In order to solve the above problems, injecting chemical agents (corrosion inhibitors,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B37/06E21B41/02E21B23/00
CPCE21B37/06E21B41/02E21B23/00
Inventor 李琼玮郭钢孙雨来谷成义姜毅苑慧莹杨立华李慧刘宁杨会丽
Owner PETROCHINA CO LTD
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