CN106323850A - Device and method for evaluating corrosion resistance of inner coating of drill pipe - Google Patents
Device and method for evaluating corrosion resistance of inner coating of drill pipe Download PDFInfo
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- CN106323850A CN106323850A CN201610671824.0A CN201610671824A CN106323850A CN 106323850 A CN106323850 A CN 106323850A CN 201610671824 A CN201610671824 A CN 201610671824A CN 106323850 A CN106323850 A CN 106323850A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/22—Investigating strength properties of solid materials by application of mechanical stress by applying steady torsional forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0021—Torsional
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0023—Bending
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- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a device and method for evaluating the corrosion resistance of an inner coating of a drill pipe. The device comprises a main heater, auxiliary heaters, a multi-stage electric stirrer, sample installation openings and stress loading devices, wherein the stress loading devices comprise the stretching stress loading device, the torsion stress loading device and the bending stress loading device. By applying the device and the method implemented on the basis of the device, the chemical medium corrosion and erosion resistance of the inner coating of the drill pipe under the action of stretching stress or bending stress or torsion stress can be evaluated; by regulating the temperature and the pressure and introducing corrosive gases such as H2S and CO2, the service environments of the inner coating of the drill pipe in different well sections under multiple working conditions can be simulated. Accordingly, the device and method have the important significance on selection and life prediction of the inner coating of the drill pipe on the oil field site.
Description
Technical field:
The invention belongs to oil well pipe corrosion evaluation technical field, particularly to a kind of drilling rod undercoating corrosion resisting property evaluated
Apparatus and method.
Background technology:
During oil gas well mining, in the working environment (drilling mud and stratum) of drilling rod often containing Korrosionsmedium (as
O2、H2S、CO2、Cl-And the catabolite etc. of drilling mud additives), drilling rod can be produced serious rotten by these Korrosionsmediums
Erosion.Simultaneously in drilling process, add when drilling rod still suffers from tensile, compressive, bending, torsion, oscillating load, rotating centrifugal and makes a trip
Under Dynamic Loads etc., working condition is the most severe.Under the common effect of above-mentioned various factors, often result in drilling rod corrosion failure.
Applying undercoating is to prevent drilling rod from sending out corrosion, improves one of effective safeguard procedures in service life of drilling rod.But,
Drilling rod undercoating is of a great variety, and quality is uneven, in use, and the undercoating case causing drilling rod to lose efficacy off quality
Example happens occasionally.To this end, scientific research technical staff micromechanism of damage internally coated to drilling rod, preventive measure etc. have carried out substantial amounts of grinding
Study carefully, also develop some assay devices evaluating undercoating military service performance simultaneously.
The testing equipment that can evaluate undercoating military service performance at present is few, mainly has: (1) Chinese patent
CN104913979A discloses " a kind of corrosion-inhibiting coating high temperature high voltage resistant evaluation experimental device and test method ", and this device is by adding
Hot systems, compression system, pressure-measuring system, high pressure valve and pipeline composition；Having main steps that to be detected of test method
Coating sample corrosion-resistanting test bucket in, seal, after then making temperature within the barrel and pressure reach rated condition, according still further to requirement of experiment
Time heat-insulation pressure keeping, until experiment terminate；Finally take out sample observation.(2) Chinese patent CN204269486U discloses
" a kind of pipeline coatings bend test device ", this device includes electro-hydraulic system, test-bed and three portions of bending mould
Point；This device bending controllable-rate, can be effectively ensured bending precision, measure the extreme flexion performance of pipeline coatings.(3) China is specially
Disclosing in profit CN204116209U " a kind of coating high-temp abrasion resistance tester ", this device includes knockout funnel and leaks with knockout
The pipeline that the outlet of bucket is connected, the lower section of pipe outlet is provided with the specimen mounting for placing sample, the back side of specimen mounting
Being provided with for placing specimen mounting, the specimen mounting back side has been provided with heating system；Which solves coating in hot environment
The test of anti-wear performance and evaluation problem.
The first assay device energy testing coating high temperature high voltage resistant corrosive nature；The second device can be tested pipeline coatings and exist
Extreme flexion performance under room temperature；The third analog is only capable of testing coating anti-wear performance under high temperature and room temperature.Above
Apparatus function is more single, and in the case of all can not simulating drilling rod stress, stretching, reverse or bend, drilling rod is internally coated
Resistant to chemical media corrosion and erosion corrosion performance.
Summary of the invention:
It is an object of the invention to for the problems referred to above, it is provided that a kind of device evaluating drilling rod undercoating corrosion resisting property and side
Method.
For reaching above-mentioned purpose, the present invention realizes by the following technical solutions:
A kind of device evaluating drilling rod undercoating corrosion resisting property, including container and the stress loading dress with airtight cavity
Putting, the bottom of this container is provided with primary heater, and circumference is provided with some secondary heaters, the top cover of this container is provided with
The air inlet pipe being connected in container and escape pipe, be provided with multi-stage motor agitator, multi-stage motor at the top cap central of this container
The multiple stirring vanes arranged from top to bottom on agitator stretch in container；
It is provided with multiple sample installing port in this container, at each sample installing port, is provided with a stress loading dress
Putting, wherein stress loading device includes tensile stress charger, distorting stress charger and bending stress charger, work
When making, sample is fixed at the sample installing port of correspondence by stress loading device.
The present invention is further improved by, and air inlet pipe is provided with the first valve, and escape pipe is provided with the second valve.
The present invention is further improved by, and the top cover of this container is additionally provided with Pressure gauge, pH meter and thermometer, respectively
Pressure, pH value and temperature in monitoring container.
The present invention is further improved by, and each sample installing port all includes the firm banking cooperated and fixes top
Seat.
The present invention is further improved by, and tensile stress charger includes drawn samples fixture, stretching clamp device
With stretching dielectric pin, wherein, the two ends of drawn samples are all installed on drawn samples by stretching clamp device and stretching dielectric pin
On fixture.
The present invention is further improved by, and distorting stress charger includes torsion sample fixture, reverses clamp device
With location dielectric pin；Wherein, one end of torsion sample is positioned at torsion sample fixture by location dielectric pin, and the other end is by turning round
Turn clamp device to be fixed on torsion sample fixture.
The present invention is further improved by, and also includes positioning swaging clamp and being opened in the low-angle on torsion sample fixture
Locating slot, by adjusting the distorting stress that swaging clamp position on low-angle locating slot, location applies to set to torsion sample.
The present invention is further improved by, and bending stress charger includes bending sample clamp, some bendings insulation
Pin, charger and insulation pressure head, wherein, the two ends of bending sample are movably connected in bending sample clamp by bending dielectric pin
On, charger is radially arranged along bending sample, and insulation pressure head is arranged on the external part of charger, by charger edge
Bending sample to move radially, it is achieved bending sample is applied bending stress.
A kind of method evaluating drilling rod undercoating corrosion resisting property, the method is resistance to based on above-mentioned a kind of evaluation drilling rod undercoating
The device of erosion performance, comprises the following steps:
The sample processed is installed to corresponding stress loading device by test requirements document, then will be equipped with adding of sample
Carry and put installation to corresponding sample installing port；Deoxygenation process is carried out by test requirements document after adding the testing liquid configured；Open
Dynamic primary heater and secondary heater, be warming up to predetermined temperature；Being passed through corrosive gas according to test requirements document, make-up gas makes to reach
Predetermined pressure；According to test needs, start multi-stage motor agitator, make fluid reach predetermined flow velocity；In process of the test, supervise in real time
Test pressure, pH value and test temperature in xylometer.
Relative to prior art, due to the fact that the above technical scheme of employing, it has the advantage that
1, the present invention relates to evaluate drilling rod undercoating apparatus and method of corrosion resisting property under chemistry-mechanics reciprocal action,
Can measure simultaneously drilling rod undercoating resistant to chemical media corrosive nature under different stretchings, bending or distorting stress effect and
Erosion property.
2, the present invention relates to evaluate drilling rod undercoating apparatus and method of corrosion resisting property under chemistry-mechanics reciprocal action,
By regulation temperature and pressure, and it is passed through H2S、CO2Deng corrosive gas, it is coated with in the drilling rod of various working difference well section can be simulated
Layer Service Environment, it is achieved that a kind of device multiple use.
3, the present invention is arranged main thermostat and secondary thermostat, it is ensured that test reaches to expect test temperature.Apply this dress
Put and set up the method on this device basic and evaluate the internally coated antiseptic property of drilling rod, internally coated to Oil Field drilling rod
Select and biometry is significant.
Accompanying drawing illustrates:
Fig. 1 is the overall structure schematic diagram of a kind of installation method evaluating drilling rod undercoating corrosion resisting property of the present invention；
Fig. 2 is the top view of sample installing port；
Fig. 3 is tensile stress charger schematic diagram；
Fig. 4 is distorting stress charger schematic diagram；Wherein, Fig. 4 (b) is the partial enlarged drawing of Fig. 4 (a)；
Fig. 5 is bending stress charger schematic diagram.
Drawing reference numeral illustrates:
1, primary heater, 2, secondary heater, 3, multi-stage motor agitator, 4, sample installing port, 5, thermometer, 6, pressure
Table, 7, pH meter, 8, air inlet pipe, 9, escape pipe, 10, mounting seat, 11, fixing footstock, 12, valve, 13, valve, 14, stretching should
Force loading device, 15, drawn samples fixture, 16, stretching clamp device, 17, stretching dielectric pin, 18, drawn samples, 19, reverse
Stress loading device, 20, torsion sample fixture, 21, reverse clamp device, 22, location dielectric pin, 23, torsion sample, 24, little
Angle locating slot, 25, location swaging clamp, 26, bending stress charger, 27, bending dielectric pin, 28, charger, 29, insulation
Pressure head, 30, bending sample.
Detailed description of the invention:
In order to the technical characteristic of the present invention, purpose and effect are more clearly understood from, in conjunction with accompanying drawing, this is described
Bright detailed description of the invention.
The structure of the present invention:
As depicted in figs. 1 and 2, the device evaluating drilling rod undercoating corrosion resisting property that the present invention proposes, including primary heater
1, secondary heater 2, multi-stage motor agitator 3, multiple sample installing port 4, thermometer 5, Pressure gauge 6, pH meter 7, air inlet pipe 8 and go out
Trachea 9.
As it is shown in figure 1, each sample installing port 5 includes a mounting seat 10 and a fixing footstock 11；In air inlet pipe 8
Valve 12 is installed, escape pipe 9 is provided with valve 13.Additionally, multi-stage motor agitator 3 is provided with Multi-stage stirring blade, really
Protect fluid and reach regulation flow velocity.
As it is shown on figure 3, tensile stress charger 14 includes drawn samples fixture 15, clamp device 16 and dielectric pin 17；
Drawn samples 18 is installed on drawn samples fixture.
As shown in Figure 4, distorting stress charger 19 includes torsion sample fixture 20, clamp device 21 and location dielectric pin
22；Torsion sample 23 is installed on torsion sample fixture 20.Charger top is provided with low-angle locating slot 24 and location swaging clamp
25。
As it is shown in figure 5, bending stress charger 26 includes dielectric pin 27, charger 28；Charger 28 uses absolutely
Edge pressure head 29, to avoid galvanic corrosion；Bending sample 30 is fixed by dielectric pin 27.
The method of evaluation drilling rod undercoating corrosion resisting property of the present invention, specifically comprises the following steps that
Being installed to corresponding stress loading device by test requirements document by the sample processed, installation test requires sample
Apply stretching, reverse or bending stress.Then the charger that will be equipped with sample is installed to corresponding sample installing port；Addition is joined
Deoxygenation process is carried out by test requirements document after the testing liquid put；Start heater, be warming up to predetermined temperature；According to test requirements document
It is passed through corrosive gas (H2S、CO2Deng), make-up gas makes to reach predetermined pressure；According to test needs, start motor stirrer,
Fluid is made to reach predetermined flow velocity.In process of the test, Pressure gauge, pH meter and thermometer real-time monitoring test pressure, pH value can be passed through
And test temperature.After test, take out sample, observe and coating is carried out performance test.
Claims (9)
1. the device evaluating drilling rod undercoating corrosion resisting property, it is characterised in that include the container with airtight cavity and answer
Force loading device, the bottom of this container is provided with primary heater (1), and circumference is provided with some secondary heaters (2), this container
The air inlet pipe (8) being provided with on top cover and be connected in container and escape pipe (9), be provided with multistage at the top cap central of this container
Motor stirrer (3), multiple stirring vanes that multi-stage motor agitator (3) is arranged from top to bottom stretch in container；
Being provided with multiple sample installing port (4) in this container, each sample installing port (4) place is provided with a stress loading dress
Putting, wherein stress loading device includes that tensile stress charger (14), distorting stress charger (19) and bending stress add
Carrying and put (26), during work, sample is fixed on sample installing port (4) place of correspondence by stress loading device.
A kind of device evaluating drilling rod undercoating corrosion resisting property the most according to claim 1, it is characterised in that air inlet pipe
(8) it is provided with the first valve (12) on, escape pipe (9) is provided with the second valve (13).
A kind of device evaluating drilling rod undercoating corrosion resisting property the most according to claim 1, it is characterised in that this container
It is additionally provided with Pressure gauge (6), pH meter (7) and thermometer (5) on top cover, is respectively used to monitor pressure, pH value and the temperature in container
Degree.
A kind of device evaluating drilling rod undercoating corrosion resisting property the most according to claim 1, it is characterised in that each sample
Installing port (4) all includes firm banking (10) and the fixing footstock (11) cooperated.
A kind of device evaluating drilling rod undercoating corrosion resisting property the most according to claim 1, it is characterised in that tensile stress
Charger (14) includes drawn samples fixture (15), stretching clamp device (16) and stretching dielectric pin (17), wherein, stretches sample
The two ends of product (18) are all installed on drawn samples fixture (15) by stretching clamp device (16) and stretching dielectric pin (17).
A kind of device evaluating drilling rod undercoating corrosion resisting property the most according to claim 1, it is characterised in that distorting stress
Charger (19) includes torsion sample fixture (20), reverses clamp device (12) and location dielectric pin (22)；Wherein, sample is reversed
One end of product (23) is positioned at torsion sample fixture (20) by location dielectric pin (22), and the other end is by reversing clamp device
(12) it is fixed on torsion sample fixture (20).
A kind of device evaluating drilling rod undercoating corrosion resisting property the most according to claim 6, it is characterised in that it is fixed also to include
Position swaging clamp (25) and the low-angle locating slot (24) being opened on torsion sample fixture (20), by adjusting location swaging clamp (25)
Position on low-angle locating slot (24) applies the distorting stress set to torsion sample (23).
A kind of device evaluating drilling rod undercoating corrosion resisting property the most according to claim 1, it is characterised in that bending stress
Charger (26) includes bending sample clamp, some bending dielectric pin (27), charger (28) and insulation pressure head (29), its
In, the two ends of bending sample (30) are movably connected on bending sample clamp by bending dielectric pin (27), charger (28)
Being radially arranged along bending sample (30), insulation pressure head (29) is arranged on the external part of charger (28), passes through charger
(28) move radially along bending sample (30), it is achieved bending sample (30) is applied bending stress.
9. the method evaluating drilling rod undercoating corrosion resisting property, it is characterised in that the method is appointed based in claim 1 to 8
One described a kind of device evaluating drilling rod undercoating corrosion resisting property, comprises the following steps:
Being installed to corresponding stress loading device by test requirements document the sample that processes, then will be equipped with adding of sample carries
Put installation to corresponding sample installing port (4)；Deoxygenation process is carried out by test requirements document after adding the testing liquid configured；Start
Primary heater (1) and secondary heater (2), be warming up to predetermined temperature；Being passed through corrosive gas according to test requirements document, make-up gas makes
Reach predetermined pressure；According to test needs, start multi-stage motor agitator (3), make fluid reach predetermined flow velocity；Process of the test
In, test pressure, pH value and the test temperature in monitoring container in real time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610671824.0A CN106323850A (en) | 2016-08-15 | 2016-08-15 | Device and method for evaluating corrosion resistance of inner coating of drill pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610671824.0A CN106323850A (en) | 2016-08-15 | 2016-08-15 | Device and method for evaluating corrosion resistance of inner coating of drill pipe |
Publications (1)
| Publication Number | Publication Date |
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| CN106323850A true CN106323850A (en) | 2017-01-11 |
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ID=57740961
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| CN201610671824.0A Pending CN106323850A (en) | 2016-08-15 | 2016-08-15 | Device and method for evaluating corrosion resistance of inner coating of drill pipe |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109975153A (en) * | 2019-04-16 | 2019-07-05 | 天津大学 | A kind of injecting type stress-erosion corrosion test device |
| CN110398415A (en) * | 2019-07-31 | 2019-11-01 | 南京航空航天大学 | A kind of bridge steel structure corrosion-inhibiting coating life-span prediction method |
| CN114608979A (en) * | 2022-03-22 | 2022-06-10 | 西南交通大学 | Bending-torsion composite high-temperature fretting fatigue test device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109975153A (en) * | 2019-04-16 | 2019-07-05 | 天津大学 | A kind of injecting type stress-erosion corrosion test device |
| CN110398415A (en) * | 2019-07-31 | 2019-11-01 | 南京航空航天大学 | A kind of bridge steel structure corrosion-inhibiting coating life-span prediction method |
| CN110398415B (en) * | 2019-07-31 | 2022-04-22 | 南京航空航天大学 | Method for predicting service life of anticorrosive coating of bridge steel structure |
| CN114608979A (en) * | 2022-03-22 | 2022-06-10 | 西南交通大学 | Bending-torsion composite high-temperature fretting fatigue test device |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination |