CN101446306B - Test device for underground hydraulic element - Google Patents
Test device for underground hydraulic element Download PDFInfo
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- CN101446306B CN101446306B CN2008102275450A CN200810227545A CN101446306B CN 101446306 B CN101446306 B CN 101446306B CN 2008102275450 A CN2008102275450 A CN 2008102275450A CN 200810227545 A CN200810227545 A CN 200810227545A CN 101446306 B CN101446306 B CN 101446306B
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- pressure
- hydraulic
- test
- hydraulic element
- fuel tank
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Abstract
The invention discloses a test device for an underground hydraulic element, and the test device comprises a control part and a test bench. The test bench comprises an oil tank, a hydraulic system and a test block, wherein, the pressure of the oil tank is equivalent to the pressure of the external environment, an outlet of the hydraulic system is connected with the test block, the hydraulic system is equipped with an overflow valve, an overflow port of the overflow valve is connected with the oil tank, the test block is used for installing a hydraulic element to be tested, and the test block can bear the high pressure and be provided with a pressure sensor; the control part is used for receiving an output signal of the pressure sensor. The test device can not only well achieve the purpose of simulation test, but also avoid the use of the special anti-pressure design and a bulky pressure-resistant shell body, thereby greatly reducing the design and the fabricating costs, leading the operation and the replacement of components to be rapid and convenient and improving the test efficiency.
Description
Technical field
The present invention relates to a kind of testing apparatus, relate to a kind of test device for underground hydraulic element specifically.
Background technique
Because hydraulics weight is light, volume is little, motional inertia is little, reaction velocity is fast, handle convenient, the easy automation that realizes machinery of control, after adopting electric liquid to jointly control, not only can realize more high-precision automatic control, and can realize remote control, so hydraulic transmission has obtained utilization widely.Increasing in recent years downhole instrument is such as formation testing, side-wall coring, all adopted hydraulic system to finish the function of its various complexity in down-hole with instruments such as brills.But hydraulic system mainly relies on elements such as control motor, pump, valve to realize its every function, and downhole instrument operating mode more complicated, environment are more abominable, than higher, the reliability of these elements, stability have determined the performance of whole hydraulic system to the various performance requirements of hydraulic element.For reliability and the stability that guarantees the hydraulic element underground work, structural feature and principle according to the underground hydraulic pressure system, research, design underground hydraulic element high temperature and pressure test device, detection or screening hydraulic element make its every performance index reach requirement and have very important significance.
As shown in Figure 1, be the structural representation of underground hydraulic element high temperature and pressure test device in the prior art.The outside of this testing apparatus is a pressure hull 11, and the inside of pressure hull 11 is full of hydraulic oil.Pressure hull 11 is provided with end cap 12, suppresses mouth 15; End cap 12 can be opened, and suppresses the hyperbaric environment that mouth 15 is used for suppressing and setting up to pressure hull 11 inside the hydraulic system outside.Be provided with pressure-bearing joint 13 at end cap 12, elastic cable paper 14 enters the inside of pressure hull 11 by pressure-bearing joint 13, and is immersed in power supplies such as hydraulic power motor in the hydraulic oil and solenoid valve for pressure hull 11 inside.Delivery side of pump is connected with experiment piece 16, and tested hydraulic element are installed in experiment piece 16 inside.
The underground hydraulic pressure system external world is the slurry environment of High Temperature High Pressure, and along with the variation of well depth, mud column pressure and temperature are also along with variation, so high temperature and high pressure environment under the complete simulation well, then must design tens and even hundreds of MPa and have the high-pressure bottle (for example pressure hull 11 among Fig. 1) that adds temperature function, and temperature and pressure are all adjustable, like this, cause very bulky complex of testing apparatus.It is convenient to change element in addition in order to test, also must heavy end cap 12, the pressure-bearing joint 13 of design, and the test system in the high temperature and high pressure containers also must be consistent with the underground hydraulic pressure system principle then.Like this, though existing testing apparatus has been simulated the high temperature and high pressure environment of down-hole fully, bring a series of problem:
1, the very huge heaviness of testing apparatus structure and complexity;
2, realize the sealing of end cap 12 and guarantee very difficulty of its compressive strength;
3, must have design, the manufacturing that relevant qualification just can be carried out this type of testing apparatus, its appropriate litigation fees costliness will be up to tens times and even tens times of ordinary test device;
4, the use of testing apparatus must be by the examining of relevant government department, and put on record;
Abnormally dangerous when 5, using, operation is difficulty quite, after must cooling off during test, and the end cap 11 of the pressurized container of dismantling, and then dismounting, change hydraulic element, it is slower to heat, and greatly reduces efficient.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of test device for underground hydraulic element, can avoid using the pressure hull of special resistance to compression design and use heaviness, and can reach the purpose of test.
In order to address the above problem, the invention provides a kind of test device for underground hydraulic element, comprise control section and test stand; Described test stand comprises fuel tank, hydraulic system and experiment piece, and the pressure of described fuel tank equates that with ambient pressure environment the outlet of described hydraulic system is connected with described experiment piece; Described hydraulic system is equipped with relief valve, and the flow-off of described relief valve links to each other with described fuel tank; Described experiment piece is used to install tested hydraulic element, and described experiment piece is provided with pressure transducer; Described control section is used to receive the output signal of described pressure transducer; Described fuel tank internal is provided with heater, and the control end of described heater is arranged on described control section.
Preferably, described hydraulic system comprises: drive motor, oil hydraulic pump, relief valve and solenoid valve, described drive motor is used for providing power to described oil hydraulic pump, described hydraulic pressure delivery side of pump links to each other with described experiment piece, and the outlet pressure size of described hydraulic system realizes by regulating described relief valve.
Preferably, described fuel tank is provided with temperature transducer, and described temperature transducer is used for the temperature of test process is carried out real-time data capture, and gives described control section with the temperature data uploading that collects.
Preferably, described control section is provided with PC, and described PC is equipped with testing software; Described testing software is used to monitor the operating mode of described hydraulic element, tested hydraulic element is controlled automatically, and the data in the process of the test are gathered.
Preferably, the output signal of described pressure transducer is delivered to described PC.
Preferably, described fuel tank is provided with temperature transducer, and described temperature transducer is used for the temperature of test process is carried out real-time data capture, and gives described PC with the temperature data uploading that collects.
The present invention does not need the pressure of mud column under the simulation well, and only needs analog system pressure and down-hole hot environment to test the underground hydraulic element service behaviour, promptly reaches the purpose of test.Adopt the present invention, can avoid using the pressure hull of special resistance to compression design and use heaviness, make design and manufacturing expense reduce greatly, operation and replacing components and parts are quick and convenient, have improved testing efficiency.And adopt the fluid passage of little pipeline (being no more than 25mm) and small aperture, avoided working pressure container or pressure piping.
Description of drawings
Fig. 1 is the structural representation of underground hydraulic element high temperature and pressure test device in the prior art;
Fig. 2 is the application scenarios schematic representation of the underground hydraulic pressure system when deduce pressure compensates among the present invention;
Fig. 3 is the structural representation of test device for underground hydraulic element among the present invention.
Embodiment
Underground hydraulic element testing apparatus of the present invention does not need mud column pressure under the simulation well, can reach the simulation test purpose and only need set up identical system pressure and hot environment.
Because the downhole instrument external world is subjected to the effect of mud column pressure, in order to eliminate with the influence of the variation mud column pressure of well depth to hydraulic system, need mud column pressure is compensated automatically, realize pressure balance by working pressure compensator (claiming pressure equaliser usually).Types such as that pressure compensator now commonly used has is bladder, metallic film type, bellow type and spring piston formula, though the structure difference, function all is the same with purpose.
If do not adopt Pressure Compensation Technology on the one hand to being sealed with very high requirement, small mud seepage all might cause the destruction of components and parts even whole system, and along with the variation of well depth, each element will progressively bear the variation that is pressed onto external pressure by interior, and this makes system structure design will become complicated; On the other hand, drive the mode that drives executive component after equipment and the control system again for traditional electric liquid with the pressure hull parcel, its heavy pressure-resistance structure design also directly has influence on system ontology weight, and then has influence on a series of problems such as energy source and power, working efficiency, system maintainability and reliability.Therefore, concerning the underground hydraulic pressure system, adopt Pressure Compensation Technology, not only can make system avoid the pressure hull of special resistance to compression design and use heaviness, and can solve of the influence of extraneous slurry environment well hydraulic system.
As shown in Figure 2, be the application scenarios schematic representation of the underground hydraulic pressure system when deduce pressure compensates among the present invention, below in conjunction with Pressure Compensation Technology feasibility of the present invention is proved.
Hydraulic system is when underground work, and fuel tank 22 outsides are High Temperature High Pressure slurry environment, and hydraulic element are immersed in 22 li of fuel tanks.One end of fuel tank 22 has pressure compensator 21, the pressure P of mud liquid
MudExpression, the internal pressure P of fuel tank 22
Fuel tankExpression.Do the time spent when pressure compensator 21 is subjected to mud column pressure, pressure compensator 21 will be under the effect of pressure reduction moves or is out of shape to low voltage terminal, and the pressure reduction up to two ends equates, i.e. p
Mud=p
Fuel tank(elastic force or the pre-compression force of ignoring spring).Although well depth is changing like this, the total and outside mud column pressure of fuel tank 22 pressure inside is realized transient equiliblium, and the suffered inside and outside differential pressure of fuel tank 22 housings is approximately zero, so just can realize the compensation to different well depth mud column pressures.
Under the effect of pressure compensator 21, the internal pressure of fuel tank 22 equals the pressure of mud column, and the inlet port pressure of oil hydraulic pump 23 return pressure of system just equates (p with outside mud column pressure like this
Pump intake=p
Fuel tank), so the external and internal pressure of oil circuit is a balance.For oil feed line, its internal pressure is the pressure (p that working pressure that the outlet pressure of oil hydraulic pump 23 equals system adds outside mud column
Pump discharge=p
System+ p
Fuel tank), that is to say that fuel supply line is subjected to outside mud column pressure also to obtain automatic compensation.Adopt auto-compensating underground hydraulic pressure power source to eliminate the influence of mud column pressure like this, the stable and higher working efficiency of system pressure when guaranteeing the instrument operation to hydraulic system.
In addition, the underground hydraulic pressure system element has adopted the immersion oil mode to design, and promptly tested hydraulic element are immersed in 22 li of fuel tanks, now several components and parts in the hydraulic system is analyzed its working principle:
1, oil hydraulic pump 23
Oil hydraulic pump 23 inlet pressures: p
Pump intake=p
Fuel tank
Oil hydraulic pump 23 outlet pressures: p
Pump discharge=p
System+ p
Fuel tank
So oil hydraulic pump 23 output powers: P
Pump output=q Δ p=qp
System, q is the flow of oil hydraulic pump 23 in the formula, Δ p is the inlet outlet pressure differential of oil hydraulic pump 23;
2, the drive motor of oil hydraulic pump 23
Drive motor output power: P
Motor output=P
The pump input, i.e. P
Motor output=q Δ p, q is the flow of oil hydraulic pump 23 in the formula, Δ p is the inlet outlet pressure differential of oil hydraulic pump 23;
3, normally closed solenoid valve 24
A) normally closed solenoid valve 24 is in the moment of unlatching:
Normally closed solenoid valve 24 inlet pressures: p
Inlet=p
System+ p
Fuel tank
Normally closed solenoid valve 24 outlet pressures: p
Outlet=p
Fuel tank
So, the pressure differential deltap p=p of normally closed solenoid valve 24 between the moment of opening enters the mouth and exports
System
B) normally closed solenoid valve 24 is in open mode in the course of the work, is equivalent to a path, so, normally closed solenoid valve 24 inlet pressures: p
Inlet=p
System+ p
Fuel tank
Normally closed solenoid valve 24 outlet pressures: p
Outlet=p
System+ p
Fuel tank
So normally closed solenoid valve 24 in opening process, enter the mouth and export between pressure differential deltap p=0
C) when normally closed solenoid valve 24 is closed
Normally closed solenoid valve 24 inlet pressures: p
Inlet=p
System+ p
Fuel tank
Normally closed solenoid valve 24 outlet pressures: p
Outlet=p
Load+ p
Fuel tank
So, the pressure differential deltap p=p between turn-off transient normally closed solenoid valve 24 inlets and outlet
System-p
Load(and load and mud column pressure are irrelevant).
From above analysis as can be known, these several hydraulic element service behaviours and mud column pressure are irrelevant, and promptly hydraulic element are not subjected to the influence of mud column pressure when underground work.
Through researching and analysing, the underground hydraulic pressure system is under the effect of pressure compensator 21, and the service behaviour of other hydraulic element equally is not subjected to the influence of mud column pressure yet, and is promptly consistent with service behaviour under the ground environment.
Because the underground hydraulic pressure system is under the effect of pressure compensator 21, the service behaviour of hydraulic element is not subjected to the influence of mud column pressure, so test device for underground hydraulic element does not need the environment of mud column high pressure under the simulation well, and as long as hot environment and system pressure can reach the purpose of simulation test under the simulation well.
As shown in Figure 3, be the structural representation of test device for underground hydraulic element among the present invention, test device for underground hydraulic element comprises Laboratory Furniture and control section on the whole.
Laboratory Furniture is used to tested hydraulic element are installed, and comprises experiment piece 31 and hydraulic system, and experiment piece 31 can bear high pressure, be installed in when hydraulic element are tested in this experiment piece 31, and in the hydraulic oil that is immersed in.Hydraulic system comprises drive motor, solenoid valve 24 and the relief valve of oil hydraulic pump 23, oil hydraulic pump 23, and the outlet of oil hydraulic pump 23 links to each other with experiment piece 31, and hydraulic system is equipped with relief valve, and the flow-off of relief valve links to each other with fuel tank 33.Oil hydraulic pump 23 can provide the pressure that needs for tested hydraulic element.This experiment piece 31 is provided with the sensor of gathering the hydraulic element pressure data, and sensor carries out real-time data capture to the pressure of tested hydraulic element in the test process, and the pressure data that collects is uploaded to PC in real time.
Further, for the hot environment under the simulation well, be provided with heater 32 and temperature transducer in fuel tank 33, the control end of heater 32 is arranged on the control cabinet 35, and sensor and heater 32 are installed in the fuel tank 33.Temperature transducer carries out real-time data capture to the temperature in the test process, and gives PC with the temperature data uploading that collects.
In the present embodiment, adopt the fluid passage of little pipeline (being no more than 25mm) and small aperture, can avoid the design of working pressure container or pressure piping, design, manufacturing expense are reduced greatly, operation and replacing components and parts are quick and convenient, improve testing efficiency greatly.
Control section comprises the PC of control cabinet 35 and test usefulness, and PC is equipped with testing software.Testing software is used to monitor the operating mode of hydraulic element, and simultaneously, testing software controls automatically to hydraulic element, and to the data in real time record of the generation in the process of the test.The suffered pressure of hydraulic element is realized by regulating relief valve.
When tested hydraulic element installation, just can carry out by operation control cabinet 35 and PC the hydraulic pressure components and parts are carried out the down-hole simulation test, and test for data is gathered.
The present invention does not need to reproduce the down-hole slurry column pressure, and only need simulate the residing down-hole of tested hydraulic element hot environment, tests the underground hydraulic element service behaviour.By facts have proved, this testing apparatus has great practical value and economic value, can reduce the difficulty and the expense of design, manufacturing greatly, improve the Security and the ease for operation of test simultaneously, not only economy but also reached the purpose of test had solved the difficult problem that the hydraulic pressure components and parts detect in scientific research and the industrialization process.In the scientific research of reality, industrialization, can use with succeeding, and the performance important effect.
Claims (6)
1. a test device for underground hydraulic element is characterized in that, comprises control section and test stand; Described test stand comprises fuel tank, hydraulic system and experiment piece, and the pressure of described fuel tank equates that with ambient pressure environment the outlet of described hydraulic system is connected with described experiment piece; Described hydraulic system is equipped with relief valve, and the flow-off of described relief valve links to each other with described fuel tank; Described experiment piece is used to install tested hydraulic element, and described experiment piece is provided with pressure transducer; Described control section is used to receive the output signal of described pressure transducer; Described fuel tank internal is provided with heater, and the control end of described heater is arranged on described control section.
2. test device for underground hydraulic element as claimed in claim 1, it is characterized in that, described hydraulic system comprises: drive motor, oil hydraulic pump, relief valve and solenoid valve, described drive motor is used for providing power to described oil hydraulic pump, described hydraulic pressure delivery side of pump links to each other with described experiment piece, and the outlet pressure size of described hydraulic system realizes by regulating described relief valve.
3. test device for underground hydraulic element as claimed in claim 1, it is characterized in that, described fuel tank is provided with temperature transducer, and described temperature transducer is used for the temperature of test process is carried out real-time data capture, and gives described control section with the temperature data uploading that collects.
4. test device for underground hydraulic element as claimed in claim 1 is characterized in that described control section is provided with PC, and described PC is equipped with testing software; Described testing software is used to monitor the operating mode of described hydraulic element, tested hydraulic element is controlled automatically, and the data in the process of the test are gathered.
5. test device for underground hydraulic element as claimed in claim 4 is characterized in that the output signal of described pressure transducer is delivered to described PC.
6. test device for underground hydraulic element as claimed in claim 4, it is characterized in that, described fuel tank is provided with temperature transducer, and described temperature transducer is used for the temperature of test process is carried out real-time data capture, and gives described PC with the temperature data uploading that collects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102275450A CN101446306B (en) | 2008-11-27 | 2008-11-27 | Test device for underground hydraulic element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102275450A CN101446306B (en) | 2008-11-27 | 2008-11-27 | Test device for underground hydraulic element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101446306A CN101446306A (en) | 2009-06-03 |
| CN101446306B true CN101446306B (en) | 2010-11-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008102275450A Expired - Fee Related CN101446306B (en) | 2008-11-27 | 2008-11-27 | Test device for underground hydraulic element |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545874B (en) * | 2016-01-20 | 2018-06-05 | 中国石油大学(北京) | A kind of split type high undersea hydrostatic pressures load actuator with hydraulic control |
| CN113309974B (en) * | 2021-07-29 | 2021-10-29 | 山东柏源技术有限公司 | Oil supply oil tank structure based on oil field fluid pressure system |
| CN113758693A (en) * | 2021-08-13 | 2021-12-07 | 中国海洋石油集团有限公司 | Experimental device for testing key components of rotary borehole wall coring apparatus |
| CN114321101B (en) * | 2021-11-27 | 2023-11-07 | 宜昌测试技术研究所 | Integrated underwater hydraulic power source |
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2008
- 2008-11-27 CN CN2008102275450A patent/CN101446306B/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| JP特开平6-3241A 1994.01.11 |
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|---|---|
| CN101446306A (en) | 2009-06-03 |
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