CN203178168U - Oil well pipe column high-temperature corrosion erosion performance test device - Google Patents
Oil well pipe column high-temperature corrosion erosion performance test device Download PDFInfo
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- CN203178168U CN203178168U CN 201320092959 CN201320092959U CN203178168U CN 203178168 U CN203178168 U CN 203178168U CN 201320092959 CN201320092959 CN 201320092959 CN 201320092959 U CN201320092959 U CN 201320092959U CN 203178168 U CN203178168 U CN 203178168U
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- oil well
- sand
- autoclave
- high temperature
- well pipe
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Abstract
The utility model provides an oil well tubular column high temperature corrosion erosion performance test device, oil well tubular column high temperature corrosion erosion performance test device includes: an autoclave, the autoclave having a sand outlet and a liquid outlet; the inlet end of the screw feeder is connected with a sand outlet of the high-pressure kettle; the inlet end of the water pump is connected with the liquid outlet of the high-pressure kettle through a particle filtering device; the mixer is connected with the outlet end of the spiral feeder and the outlet end of the water pump, and a flowmeter is arranged on the outlet end of the water pump; a nozzle connected to the mixer and extending into the autoclave. The utility model discloses can the independent control particle erosion speed, particle flow and erosion angle for the experimental result is more accurate, and is more targeted.
Description
Technical field
The utility model relates to oilfield exploitation tool performance testing field, belongs to a kind of oil well pipe high temperature corrosion erosion property test unit, be used for to estimate oil well pipe at high temperature, oil well etching condition and contains anti-damage performance under the erosion of sand flow body at a high speed.
Background technology
The class wear phenomenon that destroys appearred in the surface when erosion referred to that material is subjected to little and loose fluidized particle and impacts.Oil well pipe is the essential equipment of oil exploitation, mainly comprises drilling rod, sleeve pipe, oil pipe, anti-sandpipe etc.Oil well subsurface environment very severe, exist high temperature, burn into erosion to the combined action of oil well pipe, high temperature and corrosive attack can be aggravated the erosion attack of oil well pipe, safe reliability and the serviceable life of oil well pipe have been had a strong impact on, cause enormous economic loss to the oil field exploitation, and cause security incident easily.Therefore, need a kind of test unit of testing oil well pipe resistance to high temperature corrosion erosion property of exploitation, and the test evaluation method, in order to further investigate the failure mechanism of oil well pipe under high temperature, corrosion and erosion effect, instruct optimal design and the reasonable material of oil well pipe.
Oil well pipe high temperature corrosion test is at present generally carried out in homemade high temperature and high pressure kettle, and it is tied principle substantially and is: with high temperature and high pressure kettle and N
2Gas cylinder, CO
2Gas cylinder and H
2The S gas cylinder links to each other.Utilize conduction oil or electrically heated rod that high temperature and high pressure kettle is heated.Feeding N2 removes the dissolved oxygen DO in the autoclave medium solution earlier, feeds CO again
2And H
2S, the CO of simulation oil well reality
2And H
2The S dividing potential drop is carried out static state or the dynamic corrosion test of oil well pipe material.
The device that can be used for carrying out the oil well pipe erosion test has many types, mainly contains rotary, centrifugal and jetting type.The rotary erosion test unit is to be used for the usual means of test material erosion corrosion performance at present, it utilizes sample filling the tank body high speed rotation of corrosivity slurry, realizes that by the relative motion between sample and the slurry slurry is to the erosion corrosion wearing and tearing of sample.The major defect that this device exists is that the slurry during work in the tank body produces eddy current, makes erosion angle and erosion speed uncontrollable.
Chinese patent CN 20092449 Y disclose a kind of centrifugal slurry erosion wear test unit, slurry enters tubular shaft by pulp-inlet pipe, motor drives the tubular shaft motion by shaft coupling, slurry rotates the effect of the centrifugal intertia force of generation at a high speed by tubular shaft, Horizontal Exit by tubular shaft throws away at a high speed, impact test piece, thus realize that slurry is to the erosion on test specimen surface.The shortcoming of this device is, various parameters such as the movement locus of particle, erosion angle, particle flow need be calculated according to test condition, and the easy sedimentation of the particle in the slurry, and slurry mixes inhomogeneous, cause the particle flow instability, thereby influence test findings.
Chinese patent CN 201716245 U disclose a kind of test specimen sheet erosion abrasion test device, this device is the jetting type erosion test device, water pump is delivered to the water in the water tank in the hybrid chamber of spray gun, produce negative pressure, particle in the storage sand launder is sucked hybrid chamber, mix the back with water and form high speed mulling liquid, through the nozzle ejection, the impact specimen surface, thus sample is produced the erosion effect.The major defect of this device is, the particle concentration of slurry is influenced by the effluxvelocity of slurry, and effluxvelocity increases, and particle concentration increases simultaneously, therefore will realize difficulty of the accurate control ratio of particle concentration.
Therefore, all there is the unmanageable problem of particle flow in above-mentioned which kind of mode.
The utility model content
The utility model provides a kind of test unit of oil well pipe high temperature corrosion erosion property, to solve in the existing test the unmanageable problem of particle flow.
For this reason, the utility model proposes a kind of oil well pipe high temperature corrosion erosion property test unit, described oil well pipe high temperature corrosion erosion property test unit comprises:
Autoclave, described autoclave has sand export and liquid outlet;
Screw feeder, the entrance point of described screw feeder is connected with the sand export of described autoclave;
Water pump, the entrance point of described water pump is connected with the liquid outlet of described autoclave by the particulate filter device;
Mixer connects the endpiece of described screw feeder and the endpiece of described water pump, and the endpiece of described water pump is provided with flowmeter;
Nozzle connects described mixer and extend in the described autoclave.
Further, described oil well pipe high temperature corrosion erosion property test unit also comprises: the back up pad that is arranged on specimen mounting in the described autoclave and is arranged on the support sample on the described specimen mounting.
Further, described particulate filter device comprises: be arranged on the sand grid in the described autoclave, described sand grid is positioned at the upstream of the entrance point of described water pump.
Further, described particulate filter device also comprises: line strainer, described line strainer are between the entrance point of described sand grid and described water pump, and the filtration bore of described line strainer is less than the filtration bore of described sand grid.
Further, described autoclave have the upper port that adds sand grains and be positioned at described upper port side-lower to upper cover, described specimen mounting is positioned under the described upper port and is positioned at the inboard of described upper cover.
Further, described mixer comprises: hybrid chamber, and described hybrid chamber has sand inlet, inlet and outlet, and described sand inlet connects the endpiece of described screw feeder, and described inlet connects the endpiece of described water pump, and described outlet connects described nozzle.
Further, described mixer also comprises: be arranged on the injection orifice in the described hybrid chamber, described inlet connects the endpiece of described water pump by described injection orifice.
Further, described hybrid chamber is cylindrical, and described hybrid chamber is horizontally disposed with, and described sand inlet vertically arranges, and described injection orifice is horizontally disposed with, and described sand inlet is between described outlet and described injection orifice.
Further, described oil well pipe high temperature corrosion erosion property test unit also comprises: the Y-type three way type that is arranged on the sand export place of described autoclave, first end of described Y-type three way type links to each other with the entrance point of described screw feeder, second end of described Y-type three way type is installed the valve as sand removing hole, and the 3rd end of described Y-type three way type is connected with the sand export of described autoclave.
Further, described back up pad adjustable angle is connected on the described specimen mounting.
The utility model realizes at first that by a particulate filter device is installed sand liquid separates in autoclave; Adopt the stable independently conveying erosion particle (sand grains) of screw feeder then, the quantity of erosion particle (sand grains) is to carry by screw feeder separately, can quantitatively control, the mode of this conveying erosion particle (sand grains) has avoided existing hydrocone type to suck particle (sand grains) and the unmanageable problem of particle (sand grains) flow that causes, thereby has solved the unmanageable problem of particle flow.
The utility model can be adjusted the setting angle of the back up pad that supports sample, realizes adjustment and the variation of erosion angle.
Description of drawings
Fig. 1 is the one-piece construction synoptic diagram of the oil well pipe high temperature corrosion erosion property test unit of the utility model embodiment;
Fig. 2 is the structural representation of the specimen mounting of the utility model embodiment;
Fig. 3 is the inner structure synoptic diagram of the mixer of the utility model embodiment.
The drawing reference numeral explanation:
1, cylindrical shell; 2, upper cover; 3, capping down; 4, short tube; 5, chuck; 6, suspension plate; 7, sand grid; 8, screw feeder; 9, motor; 10, line strainer; 11, water pump; 12, flowmeter; 13, mixer; 14, mixer injection orifice; 15, accelerating tube; 16, nozzle; 17, specimen mounting; 18, sample; 19, draft tube; 20, pressure transducer; 21, temperature sensor; 22, exhausr port; 23, liquid outlet; 24, Y-type three way type; 25, upper port (adding the sand mouth); 26, chuck inlet; 27, chuck liquid outlet; 28, water temperature machine; 29, digital indicator; 30, nitrogen gas cylinder; 31, tensimeter; 32, dioxide bottle 33, sulfuretted hydrogen gas cylinder 171, back up pad 130, hybrid chamber 133, sand inlet 135, inlet
Embodiment
Understand for technical characterictic of the present utility model, purpose and effect being had more clearly, now contrast description of drawings embodiment of the present utility model.
The utility model proposes a kind of oil well pipe high temperature corrosion erosion property test unit, as shown in Figure 1, described oil well pipe high temperature corrosion erosion property test unit comprises: autoclave, screw feeder 8, water pump 11, mixer 13 and nozzle 16.
Autoclave is by chuck 5, cylindrical shell 1, upper cover 2, capping 3 down, and parts such as short tube 4, upper port 25 (adding the sand mouth), liquid outlet 23, exhausr port 22 are formed.Autoclave and N
2Gas cylinder 30, CO
2Gas cylinder 32 and H
2 S gas cylinder 33 links to each other.Utilize conduction oil or electrically heated rod that autoclave is heated.Feeding N2 removes the dissolved oxygen DO in the autoclave medium solution earlier, feeds CO again
2And H
2S, the CO of simulation oil well reality
2And H
2The S dividing potential drop is carried out static state or the dynamic corrosion test of oil well pipe material.
Further, as Fig. 1 and Fig. 2, described oil well pipe high temperature corrosion erosion property test unit also comprises: the back up pad 171 that is arranged on specimen mounting 17 in the described autoclave and is arranged on the support sample 18 on the described specimen mounting.Further, as shown in Figure 2, being connected on the described specimen mounting of described back up pad 171 adjustable angle.Sample is installed on the specimen mounting, specimen mounting 17 (for example is suspended in the autoclave by suspension plate 6, be suspended on the short tube 4 in the autoclave), back up pad 171 is by being bolted on the specimen mounting 17, sample 18 is embedded on the back up pad 171, realize the adjusting of sample erosion angle by the back up pad 171 that different angles are installed, sample erosion angle of regulation range is 10 °～90 °.
Further, as shown in Figure 1, described particulate filter device comprises: be arranged on the sand grid 7 (sand grid 7 can be tubular) in the described autoclave, described sand grid 7 is positioned at the upstream of the entrance point of described water pump 11.Fluid in the autoclave just can enter water pump after sand grid filters the bulky grain particle seeing through under the swabbing action of water pump, can effectively prevent from causing measuring because of the siphonage of water pump the flow of particle.
Further, as shown in Figure 1, described particulate filter device also comprises: line strainer 10, described line strainer 10 are between the entrance point of described sand grid 7 and described water pump, and the filtration bore of described line strainer 10 is less than the filtration bore of described sand grid 7.Just, after sand grid filtered the larger particles particle, line strainer 10 filtered than the granule particle, thereby further reduces the particle that enters into water pump.
Further, as shown in Figure 1, described autoclave have the upper port 25 that adds sand grains and be positioned at described upper port side-lower to upper cover 2, described specimen mounting 17 is positioned under the described upper port 25 and is positioned at the inboard of described upper cover 2.Like this, can add particle earlier, sample is installed in the back, can accomplish that upper port 25 has a plurality of purposes.
Further, as shown in figures 1 and 3, described mixer 13 comprises: hybrid chamber 130, described hybrid chamber 130 has sand inlet 133, inlet 135 and outlet (among the figure not label), described sand inlet 133 connects the endpiece of described screw feeder 8, described inlet 135 connects the endpiece of described water pump 11, and described outlet connects described nozzle 16.Mixer 13 becomes sand grains (particle) and mixes the space that forms erosion liquid with the erosion liquid that filters out sand grains (particle).
Further, as shown in Figure 3, described mixer 13 comprises: be arranged on the injection orifice 14 in the described hybrid chamber 130, described inlet 135 connects the endpiece of described water pump 11 by described injection orifice 14.Injection orifice 14 plays the effect that increases expulsion pressure, so that the sand grains (particle) that screw feeder 8 is carried flows to nozzle 16 all, thereby the quantity of the particle of formation nozzle 16 ejections equals the quantity of the sand grains (particle) of screw feeder 8 conveyings.
Further, as shown in Figure 3, described hybrid chamber 130 is cylindrical, and described hybrid chamber 130 is horizontally disposed with, and described sand inlet 133 vertically arranges, and described injection orifice 14 is horizontally disposed with, and described sand inlet 133 is between described outlet and described inlet 135.After the fluid that flows out enters mixer 13, in mixer, form negative pressure from water pump.Simultaneously, the screw feeder particle that will be deposited in autoclave base is transported in the mixer.Particle forms even high speed slurry with after fluid fully mixes in mixer, accelerate through acceleration in the accelerating tube 15, enters nozzle 16.
Further, described oil well pipe high temperature corrosion erosion property test unit also comprises: the Y-type three way type 24 that is arranged on the sand export place of described autoclave, first end of described Y-type three way type 24 links to each other with the entrance point of described screw feeder 8, second end of described Y-type three way type is installed the valve as sand removing hole, and the 3rd end of described Y-type three way type is connected with the sand export of described autoclave.
In the utility model, by reactor well heater control test temperature, by fluid media (medium) character and H
2S and CO
2Branch pressure-controlled etching condition, by the setting angle of sample control erosion angle, by the rotating speed control particle flow of screw feeder, by the rotating speed control erosion speed of water pump.Its principle of work is, setting under the test parameters condition, fluid in the autoclave (liquid) sees through sand grid 7 and filters the bulky grain particle under the swabbing action of water pump 11, enter pipeline, filter the granule particle through line strainer 10, enter mixer 13 by water pump 11 superchargings again, fluid enters behind the mixer 13, forms negative pressure in mixer.Simultaneously, screw feeder 8 particle that will be deposited in autoclave base is transported in the mixer 13.Particle forms even high speed slurry with after fluid fully mixes in mixer, accelerate through accelerating tube 15 acceleration, enters nozzle 16, to sample 18 surfaces, carries out erosion test by nozzle ejection.The autoclave of test unit, sand block tube, screw feeder, Y-type three way type, specimen mounting, mixer and pipeline all adopt stainless steel material in the present embodiment.Water pump is corrosion-resistant High-temperature Magnetic Pump, and maximum pump discharge is 12.5m
3/ h.Nozzle is the boron carbide nozzle in the present embodiment, nozzle inside diameter 1cm.Mixer 13 (for example being a kind of threeway) adopts the threeway of inner liner abrasive resistant Ceramic Composite.The Ceramic Composite threeway is respectively corundum ceramic (Al from inside to outside
2O
3) layer, transition bed and steel pipe layer form, wherein the steel pipe floor adopts No. 10 carbon steel steel pipes processing.Sand-oil blender injection orifice 14 adopts stainless steel to process.The rotating speed of screw feeder and pump rotary speed adopt Frequency Converter Control.The autoclave well heater adopts the water temperature machine, and maximum temperature can arrive 150 ℃, outside the chuck 5 heated liquid is housed, and enters and discharge heated liquid by chuck inlet 26 and chuck liquid outlet 27.Water temperature machine 28 is connected with chuck 5.Data acquisition system (DAS) is a digital indicator 29, by the signal of unit sheet collecting temperature sensor 21 and pressure transducer 20, and with charactron displays temperature and force value.
The utility model also provides a kind of oil well pipe high temperature corrosion erosion method of testing, and this method may further comprise the steps:
Steps A: will test required liquid and sand grains and join in the autoclave and heat, and carry out deoxygenation and feed CO
2And H
2S forms fluid-mixing;
Step B: the sand grains of heating is filtered out from autoclave, be incorporated in the screw feeder, the fluid-mixing that filters out sand grains is input in the water pump;
Step C: carry the sand grains of heating by screw feeder to nozzle, carry the fluid-mixing that does not contain sand grains to nozzle by water pump;
Step D: use nozzle that sample is carried out erosion.
Further, step B comprises: twice filtration, filter out the sand grains of larger particles the first time, and filter out the sand grains than granule for the second time.
Further, step C comprises: between water pump and nozzle, mixer is set, the sand grains of carrying from screw feeder with enter described nozzle after the fluid-mixing that does not contain sand grains by the water pump conveying fully mixes mixer.
The detailed process of oil well pipe high temperature corrosion erosion method of testing is as follows in the present embodiment:
(1) from exemplar of anti-sandpipe cutting, be processed into sample 18, specimen size is 40mm * 80mm, and with the quality m of electronic balance weighing sample
0
(2) with pH=8, contain Cl
-, Ca
2+, Mg
2+Reservoir sand (being sand grains or particle) Deng water and the particle diameter of mineral particle is 0.01～1mm joins the autoclave from autoclave upper port 25;
(3) sample 18 is installed on the specimen mounting 17, regulating the erosion angle is predetermined value, specimen mounting is fixed on the suspension plate 6 again, and closes upper port 25;
(4) start water temperature machine 28, the setting test temperature is predetermined value;
(5) open N
2Gas cylinder valve feeds N by draft tube 19 in autoclave
2Remove the dissolved oxygen DO in the fluid, ventilate after 3 hours, close autoclave exhausr port 22;
(6) open H
2 S gas cylinder 33 valves and CO
2Gas cylinder 32 valves are regulated H
2S and CO
2Dividing potential drop reach predetermined value;
(7) open N again
2Gas cylinder valve reaches predetermined value by stagnation pressure in the tensimeter 31 adjusting autoclaves;
(8) start water pump 11, the control pump rotary speed is adjusted to predetermined value with fluid erosion speed;
(9) start screw feeder motor 8, control screw feeder rotating speed is adjusted to predetermined value with particle flow, carries out erosion test, picks up counting;
(10) reach presumptive test after the time when test, close variable-frequency motor 9, water pump 11 and water temperature machine, and close the valve of gas cylinder, open exhausr port 22 and autoclave upper port 25, discharge the high pressure gas reactor;
(11) treat sample 18 cooling after, sample is taken out, the contaminant removal that it is surperficial clean and dry up after weigh, measure the quality m after the sample erosion
1
(12) test result calculations
Measure the quality of sample erosion front and back, and test duration and particle flow, calculate the erosion corrosion rate of wear according to following formula:
In the following formula: E is sample erosive wear rate; m
0Be the quality before the sample erosion; m
1Be the quality after the sample erosion; Q is particle flow; T is the erosion test time.
The utility model can independently be controlled particle erosion speed, particle flow and erosion angle, makes experimental result more accurate, more targeted.
The above only is the schematic embodiment of the utility model, is not in order to limit scope of the present utility model.For each ingredient of the present utility model can make up under the condition of not conflicting mutually; any those skilled in the art; the equivalent variations of having done under the prerequisite that does not break away from design of the present utility model and principle and modification all should belong to the scope that the utility model is protected.
Claims (10)
1. an oil well pipe high temperature corrosion erosion property test unit is characterized in that, described oil well pipe high temperature corrosion erosion property test unit comprises:
Autoclave, described autoclave has sand export and liquid outlet;
Screw feeder, the entrance point of described screw feeder is connected with the sand export of described autoclave;
Water pump, the entrance point of described water pump is connected with the liquid outlet of described autoclave by the particulate filter device;
Mixer connects the endpiece of described screw feeder and the endpiece of described water pump, and the endpiece of described water pump is provided with flowmeter;
Nozzle connects described mixer and extend in the described autoclave.
2. oil well pipe high temperature corrosion erosion property test unit as claimed in claim 1, it is characterized in that described oil well pipe high temperature corrosion erosion property test unit also comprises: the back up pad that is arranged on the specimen mounting in the described autoclave and is arranged on the support sample on the described specimen mounting.
3. oil well pipe high temperature corrosion erosion property test unit as claimed in claim 1, it is characterized in that described particulate filter device comprises: be arranged on the sand grid in the described autoclave, described sand grid is positioned at the upstream of the entrance point of described water pump.
4. oil well pipe high temperature corrosion erosion property test unit as claimed in claim 3, it is characterized in that, described particulate filter device also comprises: line strainer, described line strainer is between the entrance point of described sand grid and described water pump, and the filtration bore of described line strainer is less than the filtration bore of described sand grid.
5. oil well pipe high temperature corrosion erosion property test unit as claimed in claim 2, it is characterized in that, described autoclave have the upper port that adds sand grains and be positioned at described upper port side-lower to upper cover, described specimen mounting is positioned under the described upper port and is positioned at the inboard of described upper cover.
6. oil well pipe high temperature corrosion erosion property test unit as claimed in claim 1, it is characterized in that, described mixer comprises: hybrid chamber, described hybrid chamber has sand inlet, inlet and outlet, described sand inlet connects the endpiece of described screw feeder, described inlet connects the endpiece of described water pump, and described outlet connects described nozzle.
7. oil well pipe high temperature corrosion erosion property test unit as claimed in claim 6 is characterized in that described mixer also comprises: be arranged on the injection orifice in the described hybrid chamber, described inlet connects the endpiece of described water pump by described injection orifice.
8. oil well pipe high temperature corrosion erosion property test unit as claimed in claim 7 is characterized in that described hybrid chamber is cylindrical, described hybrid chamber is horizontally disposed with, described sand inlet vertically arranges, and described injection orifice is horizontally disposed with, and described sand inlet is between described outlet and described injection orifice.
9. oil well pipe high temperature corrosion erosion property test unit as claimed in claim 1, it is characterized in that, described oil well pipe high temperature corrosion erosion property test unit also comprises: the Y-type three way type that is arranged on the sand export place of described autoclave, first end of described Y-type three way type links to each other with the entrance point of described screw feeder, second end of described Y-type three way type is installed the valve as sand removing hole, and the 3rd end of described Y-type three way type is connected with the sand export of described autoclave.
10. oil well pipe high temperature corrosion erosion property test unit as claimed in claim 2 is characterized in that, being connected on the described specimen mounting of described back up pad adjustable angle.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320092959 CN203178168U (en) | 2013-02-28 | 2013-02-28 | Oil well pipe column high-temperature corrosion erosion performance test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320092959 CN203178168U (en) | 2013-02-28 | 2013-02-28 | Oil well pipe column high-temperature corrosion erosion performance test device |
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| Publication Number | Publication Date |
|---|---|
| CN203178168U true CN203178168U (en) | 2013-09-04 |
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ID=49074848
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|---|---|---|---|
| CN 201320092959 Expired - Fee Related CN203178168U (en) | 2013-02-28 | 2013-02-28 | Oil well pipe column high-temperature corrosion erosion performance test device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103149144A (en) * | 2013-02-28 | 2013-06-12 | 中国石油天然气股份有限公司 | Oil well pipe column high-temperature corrosion erosion performance test device and test method |
| CN103940686A (en) * | 2014-05-06 | 2014-07-23 | 上海发电设备成套设计研究院 | Liquid bump testing assembly capable of generating high-speed liquid drops by utilizing jet flow and testing method thereof |
| CN107091773A (en) * | 2017-07-04 | 2017-08-25 | 安徽威龙再制造科技股份有限公司 | A kind of injecting type slurry erosion wear experimental rig and its test method |
| CN107101903A (en) * | 2017-06-02 | 2017-08-29 | 常州大学 | HTHP multiphase flow injecting type erosion-corrosion experiment device |
| CN107228806A (en) * | 2017-07-06 | 2017-10-03 | 广西大学 | A kind of experimental provision for being used to simulate high-temperature molten salt erosion-corrosion environment |
| CN107715720A (en) * | 2017-11-23 | 2018-02-23 | 河北农业大学 | Venturi mixer |
-
2013
- 2013-02-28 CN CN 201320092959 patent/CN203178168U/en not_active Expired - Fee Related
Cited By (8)
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