CN112096347A - Anticorrosive anode tool in sleeve - Google Patents
Anticorrosive anode tool in sleeve Download PDFInfo
- Publication number
- CN112096347A CN112096347A CN202011036612.8A CN202011036612A CN112096347A CN 112096347 A CN112096347 A CN 112096347A CN 202011036612 A CN202011036612 A CN 202011036612A CN 112096347 A CN112096347 A CN 112096347A
- Authority
- CN
- China
- Prior art keywords
- base pipe
- casing
- anode
- sleeve
- pipe nipple
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910052751 metal Inorganic materials 0.000 claims abstract description 23
- 239000002184 metal Substances 0.000 claims abstract description 23
- 239000000956 alloy Substances 0.000 claims abstract description 15
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 12
- 210000002445 nipple Anatomy 0.000 claims abstract 8
- 230000007797 corrosion Effects 0.000 claims description 21
- 238000005260 corrosion Methods 0.000 claims description 21
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 239000011651 chromium Substances 0.000 claims description 3
- 229910052749 magnesium Inorganic materials 0.000 claims description 3
- 239000011777 magnesium Substances 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- 239000011701 zinc Substances 0.000 claims description 3
- 239000002699 waste material Substances 0.000 claims description 2
- 238000005536 corrosion prevention Methods 0.000 abstract description 4
- 238000006056 electrooxidation reaction Methods 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000012530 fluid Substances 0.000 description 4
- 239000003112 inhibitor Substances 0.000 description 4
- 230000018109 developmental process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000001012 protector Effects 0.000 description 3
- 244000005700 microbiome Species 0.000 description 2
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/02—Equipment or details not covered by groups E21B15/00 - E21B40/00 in situ inhibition of corrosion in boreholes or wells
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
- C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
- C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
- C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
- C23F13/16—Electrodes characterised by the combination of the structure and the material
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
- C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
- C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
- C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
- C23F13/18—Means for supporting electrodes
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1078—Stabilisers or centralisers for casing, tubing or drill pipes
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Geochemistry & Mineralogy (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Prevention Of Electric Corrosion (AREA)
Abstract
The invention relates to an anticorrosive anode tool in a casing, which mainly comprises a base pipe short joint, a metal outer sleeve, a centering device and anode alloy. The base pipe nipple joint is connected with the oil casing, the anode alloy is fixed on the base pipe nipple joint, the anode alloy set up in the base pipe nipple joint with between the metal coat, the device of rightting is fixed the anode alloy top, the device of righting place in the base pipe nipple joint with between the metal coat. The invention is mainly applied to the corrosion prevention and corrosion prevention of the casing in the exploitation and development of the oil and gas field, can effectively prevent the casing from generating electrochemical corrosion, has the characteristics of prolonging the circulating investment, prolonging the service life of the casing, and being low in cost and easy to maintain, and has simple structure and easy installation, thereby being suitable for various well conditions.
Description
Technical Field
The invention relates to an in-casing corrosion-resistant anode tool, in particular to a long-acting in-casing corrosion-resistant anode tool for preventing casing corrosion in oil-gas field development.
Background
In the field of petrochemical oil extraction, the corrosion problem of metal pipe fittings is particularly prominent, and the corrosion of the metal pipe fittings has serious influence on the development and production of various oil and gas fields. The underground equipment and the tubular column of the oil-water well are basically made of metal, and are soaked in underground water or well fluid, because the underground water or the well fluid has high mineralization degree and high ion content and belongs to electrolyte solution, the electrochemical corrosion of the metal caused by the galvanic cell action on the metal surface is a main source of the corrosion of the oil-water well, wherein the most representative is the corrosion of a sleeve, and particularly once the sleeve is corroded and damaged, the daily normal production is seriously influenced, and sometimes even the exploitation cannot be carried out. The tubular column accounts for 60-75% of the total investment in oil field production, the operation period of underground pipes, rods, pumps and the like is shortened due to corrosion, the corrosion is the main reason of damage and abandonment of the casing, and huge economic loss is caused for development and production of oil and gas fields.
Aiming at the serious corrosion problem of the oil-water well pipe fittings, the protection measure usually adopted at present is to inject a corrosion inhibitor into the oil-water well. However, the underground water or well fluid has complex composition and contains various microorganisms, so that the corrosion inhibitor is neutralized and diluted along with the increase of time to lose the corrosion prevention and corrosion prevention effects, and the microorganisms in the underground water or well fluid continuously generate antibodies to evolve according to different environments, so that the corrosion inhibitor cannot achieve the effect of long-acting protection of the casing. Moreover, the corrosion inhibitor has higher cost, and is applied to the exploitation and production of large-scale oil and gas fields, so that the economic investment of developers is undoubtedly increased.
Disclosure of Invention
In order to solve the defects in the prior production technology, the invention provides an anticorrosion anode tool in a sleeve.
Through the novel optimized structural design, the invention has the characteristics of good effect of preventing the electrochemical corrosion of the sleeve, prolonged service life of the sleeve, low cost, easy maintenance and centralization and eccentric wear prevention.
The technical scheme of the invention is that the invention provides a sleeve anticorrosion anode tool, which comprises: the base pipe short section comprises a main body and end parts positioned at two ends of the main body; the metal outer sleeve is arranged outside the short section of the base pipe; the sleeve is used for connecting one end of the base pipe short section with one end of the metal outer sleeve; the lower joint is used for connecting the other end of the base pipe short section with the other end of the metal outer sleeve; the anode alloy is arranged between the base pipe short section and the metal outer sleeve; and the righting device is arranged between the base pipe short section and the sleeve.
Preferably, the anode alloy is an alloy material formed of magnesium, zinc, aluminum, and chromium.
Preferably, the anode alloy is fixed to the body of the base pipe sub.
Preferably, the centering device mainly comprises a centering block, a spring and a pressing sleeve.
Preferably, the centralising apparatus is located between the base pipe sub and the sleeve.
Preferably, the maximum outer diameter of the centralising apparatus is greater than the inner diameter of the base pipe sub.
Preferably, a plurality of waste holes are uniformly arranged on the metal outer sleeve at equal intervals.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Detailed Description
The structure and operation of the present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, a novel and preferred corrosion-resistant anode tool in a casing is characterized by comprising a base pipe short section 1, wherein the base pipe short section 1 comprises a main body and end parts positioned at two ends of the main body; the metal outer sleeve 2 is arranged outside the base pipe short section 1; the sleeve 3 is used for connecting one end of the base pipe short section 1 with one end of the metal outer sleeve 2; the lower joint 4 is used for connecting the other end of the base pipe short section 1 with the other end of the metal outer sleeve 2; the anode alloy 5 is arranged between the base pipe short section 1 and the metal outer sleeve 2; and the righting device 6 is arranged between the base pipe short section 1 and the sleeve 3.
As a preferable mode of the present invention, the anode alloy (5) is an alloy material formed of magnesium, zinc, aluminum and chromium.
When the oil casing pipe anode protector is used, the natural potential formed by the sacrificial anode can protect oil and casings 50 meters up and down, so when the oil casing pipe anode protector is installed for oil casing pipe protection, one oil casing pipe anode protector is installed every 90-100 meters of oil pipes, the sacrificial anode and the oil pipes are connected together by using the oil pipe coupling, and the oil pipes are put into a well along with the oil pipes.
The above description is only for the purpose of illustrating preferred embodiments of the present invention and is not intended to limit the scope of the present invention, so that all equivalent structural changes made by using the contents of the specification and drawings should be considered as within the scope of the present invention.
Claims (6)
1. An in-casing corrosion-resistant anode tool, comprising: the base pipe short section (1) comprises a main body and end parts positioned at two ends of the main body; the metal outer sleeve (2), the said metal outer sleeve (2) is set up outside the short section (1) of the said parent tube; the sleeve (3) is used for connecting one end of the base pipe nipple (1) and one end of the metal outer sleeve (2); the lower joint (4) is used for connecting the other end of the base pipe nipple (1) and the other end of the metal outer sleeve (2); the anode alloy (5) is arranged between the base pipe nipple (1) and the metal outer sleeve (2); a centralizing device (6), wherein the centralizing device (6) is arranged between the base pipe short section (1) and the sleeve (3).
2. The in-casing corrosion-resistant anode tool according to claim 1, wherein: the anode alloy (5) is an alloy material formed by magnesium, zinc, aluminum and chromium.
3. The in-casing corrosion-resistant anode tool according to claim 1 or 2, wherein: the anode alloy (5) is fixed on the body of the base pipe nipple (1).
4. The in-casing corrosion-resistant anode tool according to claim 1, wherein: the centralizing device (6) is arranged between the base pipe short section (1) and the sleeve (3).
5. The in-casing corrosion-resistant anode tool according to claim 1, wherein: and a plurality of rows of waste holes are uniformly formed in the metal outer sleeve (2).
6. The in-casing corrosion-resistant anode tool according to claim 1 or 4, wherein: the maximum outer diameter of the centralizing device (6) is larger than the inner diameter of the base pipe short section (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011036612.8A CN112096347A (en) | 2020-09-27 | 2020-09-27 | Anticorrosive anode tool in sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011036612.8A CN112096347A (en) | 2020-09-27 | 2020-09-27 | Anticorrosive anode tool in sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112096347A true CN112096347A (en) | 2020-12-18 |
Family
ID=73782720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011036612.8A Pending CN112096347A (en) | 2020-09-27 | 2020-09-27 | Anticorrosive anode tool in sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112096347A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114134507A (en) * | 2021-11-29 | 2022-03-04 | 牡丹江市新翔石油机械有限责任公司 | Magnesium alloy, sacrificial anode device and oil casing pipe potential corrosion prevention device thereof |
-
2020
- 2020-09-27 CN CN202011036612.8A patent/CN112096347A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114134507A (en) * | 2021-11-29 | 2022-03-04 | 牡丹江市新翔石油机械有限责任公司 | Magnesium alloy, sacrificial anode device and oil casing pipe potential corrosion prevention device thereof |
| CN114134507B (en) * | 2021-11-29 | 2022-08-02 | 牡丹江市新翔石油机械有限责任公司 | Magnesium alloy, sacrificial anode device and oil casing pipe potential corrosion prevention device thereof |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination |