CN202153205U - Corrosion test facility under oil pipe joint real object circulating stress - Google Patents
Corrosion test facility under oil pipe joint real object circulating stress Download PDFInfo
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- CN202153205U CN202153205U CN2011202501872U CN201120250187U CN202153205U CN 202153205 U CN202153205 U CN 202153205U CN 2011202501872 U CN2011202501872 U CN 2011202501872U CN 201120250187 U CN201120250187 U CN 201120250187U CN 202153205 U CN202153205 U CN 202153205U
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Abstract
The utility model relates to a corrosion test facility under oil pipe joint real object circulating stress. A sample is a cylindrical barrel body, a joint to be detected is positioned in the middle of the sample, sealing thread joints for connecting are arranged at two ends of the barrel body, the two ends of the barrel body are connected with converting joints by threads, the other ends of converting joints are provided with coarse thread structures, and are connected with circulating stress loading equipment by threads, one end of a pressure boosting channel in an upper converting joint penetrates through a sealing thread joint and then is communicated with the interior of the sample, the other end of the pressure boosting channel in the upper converting joint is communicated with a tee joint and is connected with an air pressure pump and a pressure releasing pipe respectively by the tee joint, one end of a corrosion medium channel in a lower converting joint penetrates through the sealing thread joint and then is communicated with the interior of the sample, and the other end of the corrosion medium channel in the lower converting joint is connected with a high pressure sluice valve. By using the facility, the strength and the sealing completeness of an underground pipe column joint can be simulated under the conditions of corrosion mediums, vibration and bend, repeated well opening and closing, and the like, so that the applied safety and reliability of a special thread joint for a high temperature, high pressure and high gas rate well can be enhanced under the conditions of impingement corrosion, vacuolar corrosion, wearing and vibrating corrosion, and the like.
Description
Technical field
The utility model relates to a kind ofly can detect appraisal well lower tubular column joint corrosion test facility under the tubing sub of the corrosion under the conditions such as chatter, bending, switch well pulsating stress in kind.
Background technology
The fail-safe test detection method of at present casing adapter being used in the down-hole mainly contains: conventional material standard sample corrosion resistance test comprises detection methods such as stress corrosion, high temperature pressure corrosion, galvanic corrosion; Strength of joint and sealing integrity evaluation, the joint integrality physical object simulating test method under the conditions such as the pressure/external pressure that included, stretching/compression, bending and temperature.The practical applications practice is found, detects the tubing sub that meets the demands through above-mentioned test method and variety of issue in application, still occurs.Analysis shows; Down-hole string joint military service operating mode is very complicated; It is not only the problem of material or structure; Structure and the military service behavior of material common factor butt junction in work condition environment have very big influence, and shaking like erosion corrosion, cavitation damage (during the acid fracturing initial stage open flow), mill, (shoulder is under chatter, bending and the machining tolerance effect, produces the slit in corrosion; Corrosive medium get into to produce, and the tubing string transverse vibration of certain well body structure is more serious when big), the influence of butt junction intensity such as bend cycles stress and hermetic seal integrality can't estimate with conventional material corrosion test method or existing joint performance evaluation method.
The utility model content
The purpose of the utility model provides the tubing sub evaluation test facility in kind under a kind of simulation loop load and the dielectric corrosion condition, impacts tube column strength and hermetic seal integrality under chatter and the corrosive medium condition with appraisal well lower tubular column joint at multiple switching well, high-voltage high-speed.
The corrosion test facility is made up of pressure supercharging passage, X-over, sample, corrosive medium passage and sealing thread joint under the described tubing sub of the utility model pulsating stress in kind;
Sample is a cylindrical tube, intends the joint that detects evaluation and is positioned in the middle of the sample, and the sealing thread joint is used for connecting in the cylindrical shell two ends, is threaded with X-over; The other end of X-over is the coarse thread structure, is threaded with the pulsating stress loading equipemtn; Pressure supercharging passage one end in the last X-over passes the sealing thread joint and is communicated with sample is interior, and the other end connects a threeway, is connected with relief tube with air lift pump respectively through threeway; Corrosive medium passage one end in the following X-over passes the sealing thread joint and is communicated with sample is interior, and the other end connects a high pressure sluice valve.
Process of the test: the sealing thread joint is used in the processing connection at the sample two ends, is connected with X-over, and connects each valve, threeway, pipeline equal pressure pipeline; High pressure sluice valve adds about 3/4 place of corrosive medium to sample length overall from the bottom, closes then, adds gas boosting through upper pressure supercharging passage.Purpose is to avoid corrosive medium corrosion pressure generating equipment.When needing pressure release or changing the internal corrosion medium, utilize the relief tube pressure release, avoid corrosive medium to turn back in the air lift pump.Utilize coarse thread that sample is applied cyclic loading,, also can apply the fluctuation transverse force, the chatter of simulation tubing string at the sample middle part like stretching/compression cycle stress.Test is discharged corrosive medium through high pressure sluice valve after accomplishing, and recycles with container.It is inner to clean body through high pressure sluice valve, makes things convenient for follow-up test.
Corrosion test facility under the described tubing sub of the utility model pulsating stress in kind; Can the corrosion of simulation well lower tubular column joint under the pulsating stress condition; The corrosion mechanism that occurs in the research engineering reality; The HTHP high gas rate well is used the special thread joint, and impingment corrosion, cavitation damage (during the acid fracturing initial stage open flow), mill shake, and (shoulder is under chatter, bending and the machining tolerance effect, produces the slit in corrosion; Corrosive medium get into to produce, and the tubing string transverse vibration of certain well body structure is more serious when big) do corrosion-resistant experimental evaluation.
Description of drawings
Corrosion test facility structure synoptic diagram under Fig. 1 tubing sub pulsating stress in kind
Wherein: 1 pressure supercharging passage, 2 coarse thread structures, 3 sealing thread joints, 4 corrosive medium passages, 5 samples, 6 X-overs
Embodiment
The corrosion test facility is made up of pressure supercharging passage 1, X-over 6, sample 5, corrosive medium passage 4 and sealing thread joint 3 under the described tubing sub of the utility model pulsating stress in kind;
Sample is a cylindrical tube, intends the joint that detects evaluation and is positioned in the middle of the sample, and the sealing thread joint is used for connecting in the cylindrical shell two ends, is threaded with X-over; The other end of X-over is a coarse thread structure 2, is threaded with the pulsating stress loading equipemtn; Pressure supercharging passage one end in the last X-over passes the sealing thread joint and is communicated with sample is interior, and the other end connects a threeway, is connected with relief tube with air lift pump respectively through threeway; Corrosive medium passage one end in the following X-over passes the sealing thread joint and is communicated with sample is interior, and the other end connects a high pressure sluice valve.
Claims (1)
1. corrosion test facility under the tubing sub pulsating stress in kind is made up of pressure supercharging passage, X-over, sample, corrosive medium passage and sealing thread joint; It is characterized in that:
Sample is a cylindrical tube, intends the joint that detects evaluation and is positioned in the middle of the sample, and the sealing thread joint is used for connecting in the cylindrical shell two ends, is threaded with X-over; The other end of X-over is the coarse thread structure, is threaded with the pulsating stress loading equipemtn; Pressure supercharging passage one end in the last X-over passes the sealing thread joint and is communicated with sample is interior, and the other end connects a threeway, is connected with relief tube with air lift pump respectively through threeway; Corrosive medium passage one end in the following X-over passes the sealing thread joint and is communicated with sample is interior, and the other end connects a high pressure sluice valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202501872U CN202153205U (en) | 2011-07-15 | 2011-07-15 | Corrosion test facility under oil pipe joint real object circulating stress |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202501872U CN202153205U (en) | 2011-07-15 | 2011-07-15 | Corrosion test facility under oil pipe joint real object circulating stress |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202153205U true CN202153205U (en) | 2012-02-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202501872U Expired - Lifetime CN202153205U (en) | 2011-07-15 | 2011-07-15 | Corrosion test facility under oil pipe joint real object circulating stress |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202153205U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102680176A (en) * | 2012-05-24 | 2012-09-19 | 中国石油天然气集团公司 | Real stress corrosion testing machine for tubes |
| CN104697713A (en) * | 2015-02-15 | 2015-06-10 | 宝鸡石油钢管有限责任公司 | Testing device and testing method for testing sealing property of special screwed joint |
| CN105973793A (en) * | 2016-05-30 | 2016-09-28 | 中国科学院金属研究所 | Downhole stress corrosion testing method and device |
| CN109490109A (en) * | 2018-02-06 | 2019-03-19 | 中国科学院金属研究所 | A kind of tubulose sample high-temperature high pressure water corrosion fatigue test apparatus |
| CN110470533A (en) * | 2019-07-18 | 2019-11-19 | 常州大学 | Union elbow failure analysis experimental rig under a kind of soil environment |
-
2011
- 2011-07-15 CN CN2011202501872U patent/CN202153205U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102680176A (en) * | 2012-05-24 | 2012-09-19 | 中国石油天然气集团公司 | Real stress corrosion testing machine for tubes |
| CN102680176B (en) * | 2012-05-24 | 2015-10-14 | 中国石油天然气集团公司 | A kind of tubing stress corrosion (cracking) test machine in kind |
| CN104697713A (en) * | 2015-02-15 | 2015-06-10 | 宝鸡石油钢管有限责任公司 | Testing device and testing method for testing sealing property of special screwed joint |
| CN104697713B (en) * | 2015-02-15 | 2017-09-15 | 宝鸡石油钢管有限责任公司 | A kind of experimental rig and test method for testing Special threading connector sealing |
| CN105973793A (en) * | 2016-05-30 | 2016-09-28 | 中国科学院金属研究所 | Downhole stress corrosion testing method and device |
| CN105973793B (en) * | 2016-05-30 | 2019-01-18 | 中国科学院金属研究所 | A kind of underground stress corrosion test method and device |
| CN109490109A (en) * | 2018-02-06 | 2019-03-19 | 中国科学院金属研究所 | A kind of tubulose sample high-temperature high pressure water corrosion fatigue test apparatus |
| CN109490109B (en) * | 2018-02-06 | 2021-07-23 | 中国科学院金属研究所 | High-temperature and high-pressure water corrosion fatigue test device for tubular sample |
| CN110470533A (en) * | 2019-07-18 | 2019-11-19 | 常州大学 | Union elbow failure analysis experimental rig under a kind of soil environment |
| CN110470533B (en) * | 2019-07-18 | 2022-02-08 | 常州大学 | Analysis test device for destruction of elbow joint under soil environment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120229 |
|
| CX01 | Expiry of patent term |