CN205786247U - A kind of down-hole stress corrosion test device - Google Patents
A kind of down-hole stress corrosion test device Download PDFInfo
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- CN205786247U CN205786247U CN201620513451.XU CN201620513451U CN205786247U CN 205786247 U CN205786247 U CN 205786247U CN 201620513451 U CN201620513451 U CN 201620513451U CN 205786247 U CN205786247 U CN 205786247U
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- corrosion test
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Abstract
This utility model relates to a kind of down-hole stress corrosion test device; there is stress corrosion test cell; protection shell and jointing; wherein stress corrosion test cell is many groups; it is arranged in the cavity of protection shell; jointing one end is arranged on protection shell threads, and compresses the protection shell corrosion test unit group that intracavity is installed on an empty stomach, and the jointing other end is connected with downhole hardware.This utility model apparatus structure is simple, dismounting and easy to operate, is not affecting in the case of Oil/gas Well normally produces, it is achieved the stress corrosion test of subsurface environment, the studied material of actual response, in the stress corrosion status information of subsurface environment, provides foundation for plant maintenance and selection.
Description
Technical field
This utility model relates to a kind of downhole corrosion measuring technology, a kind of down-hole stress corrosion test dress
Put.
Background technology
Oil-gas field development production status environment generally has " high temperature, high pressure, high CO2, high H2S, high Cl-, high salinity "
Feature, the operation technique that the working conditions of these complicated harshnesses are the most special causes oil gas tubing string generation stress corrosion to be lost efficacy.Closely
Year is along with CO2The development of technology of reservoir sweep, stress corrosion failure phenomenon is on the rise, and brings heavy losses to national economy.To oil
Pipe and underground equipment metal material carry out the stress corrosion test in Service Environment, can be to metal material at specific operation environment
In practicality be evaluated and predict its service life, instruct selection and plant maintenance.
At present, the method that research stress corrosion both at home and abroad generally uses is at laboratory normal temperature and pressure Imitating operating mode medium
Carry out constant strain method, constant load method and slow strain rate tension method (SSRT) stress etching experiment of static state.These method of testings
Only simulate corrosive concentration condition, relatively big with real working condition deviation, the Sensitivity of Stress Corrosion of metal material can only be made
Qualitative evaluation.Additionally, environmental stress corrosion device under also minority simulates High Temperature High Pressure, as CN102706750A discloses one
High Temperature High Pressure constant load stress corrosion experiment method and device, the most now metal material is under certain stress state, is in high temperature
Constant load stress etching experiment under high pressure vapor or aqueous etching medium effect, but it can not multiphase flow in simulated condition environment
The impact washed away；CN105021455A discloses a kind of metal material stress etching experiment under actual working conditions of simulating and fills
Put, and carry out, in device inner rotation, the impact that material is washed away by simulation medium by test specimen.But the method is laboratory mould after all
Plan method, departing from true down-hole high temperature, high pressure, the working condition of multiphase flow erosion comprehensive function, test result and true feelings
There is gap in condition.
Utility model content
Deviate relatively for down-hole stress corrosion test only simulation corrosive concentration condition and real working condition in prior art
Big wait deficiency, the technical problems to be solved in the utility model be to provide a kind of simple in construction, can the studied material of actual response
Device is surveyed in down-hole stress corrosion in the stress corrosion status information of subsurface environment.
For solving above-mentioned technical problem, the technical solution adopted in the utility model is:
This utility model one down-hole stress corrosion test device, has a stress corrosion test cell, protection shell and
Jointing, wherein stress corrosion test cell is many groups, is arranged in the cavity of protection shell, and jointing one end is arranged on
On protection shell threads, and compress the protection shell corrosion test unit group that intracavity is installed on an empty stomach, the jointing other end
It is connected with downhole hardware.
The protection shell whole body has strip pod apertures, and downhole corrosion medium enters into stress corrosion by pod apertures and tests
Unit.
Stress corrosion test cell includes stress corrosion test piece, cylinder, the first top cap, the second top cap and loads jackscrew,
Cylinder is that rustless steel is columnar structured, and the whole body has multiple rows of medium water conservancy diversion aperture, and stress corrosion test piece is placed through in cylinder, two ends
Fixed by individual top cap；Loading jackscrew to be entered in cylinder by the screwed hole of cylinder lateral wall, counter stress corrosion coupon loads.
The silk crown end loading jackscrew is provided with groove, and cylinder upper screwed hole is provided around graduation mark, and groove is joined with graduation mark
Close and read ess-strain amount information.
First top cap, that the second top cap is boss is cylindric, is provided with for clamping stress corrosion examination in the middle of boss top end face
The draw-in groove of sheet.
This utility model has the advantages that and advantage:
1. this utility model apparatus structure is simple, dismounts and easy to operate, is not affecting the situation that Oil/gas Well normally produces
Under, it is achieved the stress corrosion of subsurface environment test, the studied material of actual response in the stress corrosion status information of subsurface environment,
Foundation is provided for plant maintenance and selection.
Accompanying drawing explanation
Fig. 1 is this utility model apparatus structure schematic diagram；
Fig. 2 is the stress corrosion test cell structure chart of this utility model device；
Fig. 3 is the stress corrosion test cell structural representation of this utility model device；
The in-site installation schematic diagram of Fig. 4 this utility model device.
Wherein, 1 is stress corrosion test cell, and 2 is protection shell, and 3 is jointing, and 4 is stress corrosion test piece, and 5 are
Cylinder, 6 is top cap, and 7 for loading jackscrew, and 8 is sucker rod, and 9 is oil pipe, and 10 is oil well casing, and 11 test for down-hole stress corrosion
Device.
Detailed description of the invention
Below in conjunction with Figure of description, this utility model is further elaborated.
As it is shown in figure 1, this utility model one down-hole stress corrosion test device, there is stress corrosion test cell 1, protect
Protecting shell 2 and jointing 3, wherein stress corrosion test cell 1 is many groups, is arranged in the cavity of protection shell 2, connects
Joint 3 is arranged on protection shell 2 threads, and compresses the protection shell 2 corrosion test unit group that intracavity is installed on an empty stomach.
In the present embodiment, a set of stress corrosion test device 11 installs 3 groups of identical stress corrosion test cells 1 of structure,
Between group end to end, by jointing 3 protection shell 2 tail end compress；Protection shell 2 whole body has strip pod apertures, well
Lower corrosive medium enters into stress corrosion test cell 1 by pod apertures.
The long tube that protection shell 2 is made for corrosion resistant alloy material, long tube one end is taper, and the long tube whole body has bar shaped water conservancy diversion
Hole.
The externally threaded joint of two ends band that jointing 3 is made for corrosion resistant alloy material, outside jointing 3 one end is with protection
Shell 2 connects, and compresses the interior stress corrosion test cell 1 placed of protection shell 2 cavity；Jointing 3 other end and sucker rod 8
Or other downhole devices connect, stress corrosion test cell 1 is sent into down-hole and carries out stress corrosion (cracking) test.
As shown in Figure 2,3, stress corrosion test cell 1 is capsule-like structure, including stress corrosion test piece 4, cylinder 5,
One top cap 6a, the second top cap 6b and load jackscrew 7, stress corrosion test piece 4 is elongated metal test piece, test piece material with ground
The material studying carefully equipment is identical, and each capsule shape stress corrosion test cell 1 comprises 2 top caps.The preferred rustless steel of described cylinder or
It is columnar structured that corrosion resistant alloy steel is made, and the whole body has multiple rows of medium water conservancy diversion aperture.One is opened in the sidewall centre position of cylinder 5
Locate and load the penetrating type screwed hole that jackscrew 7 matches, load jackscrew 7 for fixing and load operation.Carve around threaded apertures
There is graduation mark, be used for reading test piece deflection.
For avoiding and metallic test test piece generation galvanic corrosion, preferably top emits and uses ceramic material to make.
It is that boss is cylindric that top emits 6, is machined with the draw-in groove suitable with the width x thickness size of test piece, uses in the middle of boss top end face
In clamping stress corrosion test piece 4.
The cheese head screw of band six square nut that described loading jackscrew 7 is made for ceramic material, loads jackscrew 7 and is screwed in cylinder 5
Screwed hole on, by tighten loading jackscrew 7 counter stress corrosion coupon 4 load.
Protection shell 2, jointing 3 and the preferred corrosion resistant alloy material of cylinder 5 are made；For avoiding sending out with metallic test test piece
Raw galvanic corrosion, the first top cap 6a, the second top cap 6b and the loading preferred insulating ceramic materials of jackscrew 7 are made.
A graduation mark is carved on the six square nut tops loading jackscrew 7, coordinates with the graduation mark on cylinder and can read metal examination
The deflection of sheet.Loading jackscrew and twist the tightest, the stress of loading is the biggest, and the strain of test piece is the biggest.
A set of stress corrosion test device can install many group stress corrosion test cells 1 additional, installs stress corrosion test cell additional
Quantity and often group stress section load ess-strain amount can determine according to testing requirement.
Down-hole stress corrosion test device mounting means in oil well as shown in Figure 4, pacify by stress corrosion test device 11
It is loaded in oil pipe 9, it is possible to be arranged in the annular space between oil pipe 9 and oil well casing 10.Down-hole stress corrosion test device
11 are fixed on sucker rod 8 bottom, and deliver to down-hole during with sucker rod operation.
This utility model uses following methods to carry out down-hole stress corrosion test, and step is:
Step one, prepares before test:
1) investigate the stress condition of field apparatus, equipment material, calculate load deflection amount；
2) prepare test piece, process strip stress corrosion test piece 4 according to installation dimension parameter, ground, clean, weigh after
Standby；
Step 2, the installation of down-hole stress corrosion test device:
3) through cylinder 5 and fixing by top cap 6 by ready stress corrosion test piece 4 respectively；
Turn loading jackscrew 7 and carry out loading stress to stress corrosion test piece 4, be loaded into pre-by often organizing stress test unit 1
If dependent variable；
4) stress test unit 1 is sequentially loaded in protection shell 2 cavity, loads onto jointing 3 and tighten；
Step 3, down-hole stress corrosion (cracking) test:
5) a whole set of down-hole stress corrosion test device 11 is connected to sucker rod 8 bottom by jointing 3 or other are gone into the well
On device, deliver to down-hole therewith, carry out stress corrosion (cracking) test；
6), after the test period terminates, take out stress corrosion test device, take off stress corrosion test piece；
Step 4, A+E:
7) if test piece fracture, cleaning fracture, fracture apperance observation and Analysis on action mechanism are carried out；
8) if test piece is not ruptured, first carry out strip erosion profile and corrosion product analysis, then clean corrosion
Product, calculating corrosion rate of weighing；
9) after, test piece is installed on stretching-machine and Apparatus for Bending at low-temp and stretches and bend, test out metal material power
Learn performance loss rate；
10) data are carried out finishing analysis, material is made an appraisal in subsurface environment Sensitivity of Stress Corrosion.
This utility model provides a kind of device for oil gas field down-hole stress corrosion test, is not affecting normal production
In the case of, it is possible to complete subsurface environment state to the stress corrosion (cracking) test under different ess-strains of the equipment metal material,
Obtain the subsurface environment stress corrosion information to metal testing plate, to instruct equipment selection and maintenance.
Claims (5)
1. a down-hole stress corrosion test device, it is held to levy and is: have stress corrosion test cell, protection shell and company
Joint, wherein stress corrosion test cell is many groups, is arranged in the cavity of protection shell, and jointing one end is arranged on guarantor
Protect on shell threads, and compress the corrosion test unit group that protection shell on an empty stomach intracavity is installed, the jointing other end with
Downhole hardware connects.
2. the down-hole stress corrosion test device as described in claim 1, it is held to levy and is: protect the shell whole body to have strip
Pod apertures, downhole corrosion medium enters into stress corrosion test cell by pod apertures.
3. device is tested in the down-hole stress corrosion as described in claim 1, and it is held to levy and is: stress corrosion test cell includes should
Power corrosion coupon, cylinder, the first top cap, the second top cap and loading jackscrew, cylinder is that rustless steel is columnar structured, and the whole body has
Multiple rows of medium water conservancy diversion aperture, stress corrosion test piece is placed through in cylinder, and two ends are fixed by individual top cap；Load jackscrew by cylinder lateral wall
Screwed hole enter in cylinder, counter stress corrosion coupon loads.
4. device is tested in the down-hole stress corrosion as described in claim 3, and it is held to levy and is: the silk crown end loading jackscrew is provided with
Groove, cylinder upper screwed hole is provided around graduation mark, and groove coordinates reading ess-strain amount information with graduation mark.
5. device is tested in the down-hole stress corrosion as described in claim 3, and it is held to levy and is: the first top cap, the second top cap are
Boss is cylindric, is provided with the draw-in groove for clamping stress corrosion test piece in the middle of boss top end face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620513451.XU CN205786247U (en) | 2016-05-30 | 2016-05-30 | A kind of down-hole stress corrosion test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620513451.XU CN205786247U (en) | 2016-05-30 | 2016-05-30 | A kind of down-hole stress corrosion test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205786247U true CN205786247U (en) | 2016-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620513451.XU Expired - Fee Related CN205786247U (en) | 2016-05-30 | 2016-05-30 | A kind of down-hole stress corrosion test device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2016
- 2016-05-30 CN CN201620513451.XU patent/CN205786247U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161207 Termination date: 20190530 |
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| CF01 | Termination of patent right due to non-payment of annual fee |