CN101598625A - A kind of detected gas accumulator that is used for the gases at high pressure leak hunting method - Google Patents
A kind of detected gas accumulator that is used for the gases at high pressure leak hunting method Download PDFInfo
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- CN101598625A CN101598625A CNA200910086710XA CN200910086710A CN101598625A CN 101598625 A CN101598625 A CN 101598625A CN A200910086710X A CNA200910086710X A CN A200910086710XA CN 200910086710 A CN200910086710 A CN 200910086710A CN 101598625 A CN101598625 A CN 101598625A
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- 238000000034 method Methods 0.000 title claims abstract description 33
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- 239000012530 fluid Substances 0.000 claims abstract description 56
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 56
- 230000008676 import Effects 0.000 claims abstract description 40
- 238000012360 testing method Methods 0.000 claims abstract description 28
- 238000007599 discharging Methods 0.000 claims abstract description 17
- 238000007789 sealing Methods 0.000 claims description 112
- 238000001514 detection method Methods 0.000 description 54
- 239000001307 helium Substances 0.000 description 18
- 229910052734 helium Inorganic materials 0.000 description 18
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 16
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- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
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- 238000010586 diagram Methods 0.000 description 2
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- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000012113 quantitative test Methods 0.000 description 2
- 239000000700 radioactive tracer Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000008400 supply water Substances 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
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Abstract
The invention provides a kind of detected gas accumulator that is used for the gases at high pressure leak hunting method, comprise a power section and a pressurized container, power section comprises a water pump; There are low pressure detected gas inlet port and high pressure detected gas escape hole in the pressurized container upper end, low pressure detected gas inlet port is connected with source of the gas by draft tube, high pressure detected gas escape hole is connected with testing tool by high-pressure exhaust pipe, a high pressure liquid import and a leakage fluid dram are established in the pressurized container lower end, the high pressure liquid import connects the outlet of water pump high pressure liquid by feed tube, connects discharging tube on the leakage fluid dram.On each connecting line, establish corresponding control valve member, enter and discharge this pressurized container with the control high pressure liquid, and low-pressure gas enters pressurized container and gases at high pressure are discharged from pressurized container.Accumulator provided by the invention can be at the scene supercharging detected gas fast, and simple in structure, easy to use, for whether checkout equipment pipeline connecting portion under the in-site modeling awp state leaks the guarantee that provides certain.
Description
Technical field
The invention belongs to high-voltage tube string sealing detection range, especially industrial gas oil tubing string and string of casing sealing detection range provide a kind of can increasing detected gas to high pressure or UHV (ultra-high voltage) fast to detect the detected gas accumulator that uses in the gas leak detection method of tubing string and string of casing sealing.
Background technology
Pressure duct is after pipe couples together or repairs, often need the sealing detection is carried out in its connection or reparation position, for example need to finish the conveying of oil gas in the petroleum industry with oil pipe and sleeve pipe and aid thereof, tubing string and string of casing are exactly oil pipe and sleeve pipe and the aid that links together, they constitute the passage that oil gas flows, and this pipe string is collectively referred to as tubing string or string of casing.In order to guarantee that the oil gas in oil well and the gas well flows out oil well or gas well according to the channel security of designing requirement, tubing string and string of casing just all need good sealing.
The way that guarantees the sealing of tubing string or string of casing in the prior art is: in the laboratory the pin thread and the box of every oil pipe or sleeve pipe or aid, be connected with male joint with the mother of standard respectively, set up confined space, in oil pipe or sleeve pipe confined space, inject a certain amount of high pressure detected gas then, water submergence oil pipe or sleeve pipe or aid again, oil pipe or sleeve pipe or aid do not emit bubble within a certain period of time, and the sealing of oil pipe or sleeve pipe or aid screw thread is described.Detect qualified after, again oil pipe or sleeve pipe or aid are unloaded from joint, be transported to the working-yard respectively and use.In the working-yard, oil field, oil pipe or sleeve pipe or aid are joined together to form the tubing string string by root.Above-mentioned detection method can not be used at the scene, just play for the connecting thread on oil pipe or the sleeve pipe in the check of setting the sealing after whether can satisfying connection under the high pressure, promptly check screw thread whether qualified, and the sealing of the actual tubing string junction screw thread that couples together in scene is not tested, breadboard detection conclusion can only illustrate that connecting thread can meet the requirements of seal degree, but can not guarantee that but the sealing situation of reality that the scene is lowered to the screw thread of oil pipe in the oil gas well or sleeve pipe or aid is good.
Why can not carry out the scene leak detection to the equipment connecting portion in the prior art, its major reason is not have a kind of pressure generating equipment that can generate the high pressure detected gas fast, efficiently, at an easy rate.
Summary of the invention
The objective of the invention is to improve the described problem of prior art, a kind of on-the-spot needs that satisfy are provided, can carry out the detected gas accumulator that uses in the sealing gases at high pressure leak hunting method efficiently for the devices such as pipe string that couple together at the scene.
The object of the present invention is achieved like this:
The detected gas accumulator that is used for the gases at high pressure leak hunting method provided by the invention, it comprises a power section and a pressurized container.
Described power section comprises a water pump;
Described pressurized container, there are low pressure detected gas inlet port and high pressure detected gas escape hole in its upper end, low pressure detected gas inlet port is connected with source of the gas by draft tube, high pressure detected gas escape hole is connected with testing tool by high-pressure exhaust pipe, the pressurized container lower end is provided with a high pressure liquid import and a leakage fluid dram, this high pressure liquid import exports by the high pressure liquid that feed tube connects described water pump, connects discharging tube on the leakage fluid dram.On each connecting line, be provided with the control corresponding valve member, enter and discharge this pressurized container with the control high pressure liquid, and low-pressure gas enter pressurized container and gases at high pressure are discharged from pressurized container.
The process that generates the high pressure detected gas by this accumulator is: at first inject detected gas in the pressurized container of accumulator; Start high-pressure hydraulic pump then, high pressure liquid stream is entered the pressurized container from the high pressure liquid import of pressurized container, compression detected gas wherein is to detecting required set pressure; The high pressure detected gas that produces is transported to for example such testing tool by pipeline, and described testing tool comprises card envelope instrument and detected set air-casing.Card envelope instrument is arranged on the inside of tubing string to be detected or string of casing or auxiliary pipe, is positioned the both sides of the connecting thread button part that may leak to be checked, in order to set up the interior confined space that can charge into detected gas or to claim plenum space; Described detected set air-casing is arranged on tubing string or string of casing or aid outside, is positioned the connecting thread button position that may leak, and it is covered in wherein, and foundation can detect the outside confined space of leakage or claim to detect the space; High-pressure exhaust pipe on plenum space and the described pressurized container links, and makes the high pressure detected gas enter.The detector of itself and detected gas is linked detecting on the space by being provided with pipeline.Whether there is detected gas to be leaked to by the detector detection and detects the space by tested connecting portion, thereby determine detected part and under the design detected pressures, whether have leakage, simultaneously, change the degree that quantitative test connecting thread button leaks according to the concentration of trace elements in the gas leakage.After the leak detection at a detection position is finished, described testing tool is unloaded from this detection position, promptly open the leakage fluid dram discharge opeing of pressurized container, discharging liquid is wherein closed the discharge opeing operation valve then, allows the high pressure detected gas turn back to pressurized container from plenum space automatically, step-down is a low-pressure gas, close the pressurized container exhausr port, open the bleed-off valve on the blowdown piping that the pressurized container exhausr port is provided with to the high pressure line between the plenum space, discharge the inner unnecessary low pressure detected gas of plenum space; Remove the card envelope of card envelope instrument again, described card envelope instrument is taken out from detecting the position.Unload the gas collection cover simultaneously.After the leak detection that one of pipe string detects the position is finished, will block envelope instrument and detected set air-casing again and move on to another leak detection position, testing tool is arranged on constitutes described plenum space and detection sky on this leak detection position.
Described card envelope instrument comprises that two is inflatable and the tube passage both sides at described detection position are closed the card sealing that constitutes described plenum space by feeding fluid.Further, described card envelope instrument can be to be converted to axial thrust by the pressure that injects fluid, and then is converted to the card sealing that radial force makes it to expand.
During the described card envelope instrument of use by the card sealing that injects fluid and expand, in the described leak hunting method, increase a step of setting up plenum space, be about to card envelope instrument and be arranged in the tubing string, two cover card sealings are positioned to detect the both sides at position, then, in the card sealing, inject fluid, make packing element wherein be radially expanded,, form airtight plenum space until being adjacent to tube wall.After the leak detection at a detection of pipe string position is finished, the fluid in the card sealing is emitted, to unload described card envelope instrument.Move on to after another detects position will blocking the envelope instrument, will in the card sealing, charge into fluid earlier, set up plenum space, in it, charge into the detected gas of set pressure again at the leak detection position.
Use card envelope instrument, the fluid that feeds in its card sealing can liquid, preferred water.To be with setting-out to inject the card sealing by water pump.In the card sealing, import water under high pressure if utilize the described water pump that high pressure liquid is provided in pressurized container, then can on described feed tube, pick out a high pressure liquid branch road and be used for being connected, on this high pressure liquid branch road operation valve is set with the import of the card sealing of testing tool; On this high pressure liquid branch road, be provided with the branch road that discharges water, on this discharges water branch road, draw-off valve be set.Should pick out a high-pressure liquid line from the high pressure liquid import of described pressurized container, make its import that is connected to the card sealing, on this high-pressure liquid line, operation valve is set.
When improving to pressurized container input water under high pressure that wherein detected gas pressure is to design pressure, simultaneously by described high-pressure liquid tube water-filling in the card sealing, be adjacent to tube wall until card sealing packing element, form plenum space, stop to supply water to the card sealing by described operation valve.
The fluid that feeds in the card sealing also can be a gas, by air pump with in the gas input card sealing.If utilize the detected gas in the described pressurized container to make the card sealing in the card sealing expand, then can on described gas outlet, set up a branch road, be used for being connected with the import of testing tool card sealing, on this branch road operation valve is set; On this branch road, also be provided with an emptying branch road, on this emptying branch road, be provided with atmospheric valve.
When the air pressure of detected gas in the described pressurized container reaches the required pressure of card sealing card envelope, this detected gas is fed the card sealing, the pressure in the card sealing reaches and is adjacent to tube wall, forms till the plenum space.
Using described card envelope instrument and using detected gas is a preferable scheme as the card envelope fluid in the card sealing, like this can be so that equipment is simple, easy to operate.In this scheme, a pressure release bypass is set on the described branch road of increase, blowdown valve is set on it.In the operation, the high-pressure exhaust pipe of high pressure detected gas on pressurized container is by the gases at high pressure output pipe, to the card envelope fluid inlet end of card envelope instrument.When reaching card sealing Ka Fengguanlu, the air pressure of importing gas forms the required pressure of plenum space, card sealing card is established and is finished, plenum space is set up, cut off this branch road by the control valve member on the connecting line, at this moment, if the pressure of the detected gas in the pressurized container is the set pressure of detected gas, then with the high pressure detected gas in the pressurized container by of the plenum space conveying that by card sealing form of gases at high pressure vent pipe to card envelope instrument.If the pressure of the detected gas in the pressurized container is lower than the set pressure of detected gas, then needing then needs to switch on the pump, highly pressurised liquid is carried in continuation in pressurized container, improve the wherein pressure of detected gas, and the air pressure in plenum space reaches the set pressure of leak detection.After a leak detection position leak detection is finished,, will block sealing and take off by dischargeing the gas in the card sealing.The preferred helium of described detected gas.After detect finishing, can by connect pipeline between described card sealing and the pressurized container will block in the sealing with plenum space in detected gas send back in the pressurized container.Particularly, can be earlier the liquid in the pressurized container be discharged, reduce the pressurized container internal pressure by operation valve, like this, plenum space or will successively flow back in the pressurized container together with the detected gas in the card sealing.
Should put the detected gas of plenum space during operation earlier,, discharge the gas in the card sealing again up to the pressure and the atmospheric pressure balance of plenum space.
Be respectively arranged with retaining valve on inlet in described pressurized container and the air intake opening.
Specifically, described pressurized container can be one can bear the closed shell of high pressure or UHV (ultra-high voltage), preferred body, and it is made by good mechanical property, high-quality steel with higher load performance.Use described body to make described pressurized container, one port of this body constitutes described low pressure detected gas inlet port and high pressure detected gas escape hole, the another port constitutes a described high pressure liquid import and a leakage fluid dram, descending in a last and described high pressure liquid import and a leakage fluid dram in order to ensure described low pressure detected gas inlet port and high pressure detected gas escape hole, then described body is for having the oblique placement in certain inclination angle with surface level.The preferred 10-60 in described angle of inclination °.
When described pressurized container was body, a port of this body constituted described low pressure detected gas inlet port and high pressure detected gas escape hole, connects described draft tube and high-pressure exhaust pipe by a threeway on this port; The another port of this body constitutes a described high pressure liquid import and a leakage fluid dram, connects described feed tube and discharging tube by a threeway; Described body is for having the oblique placement in certain inclination angle with surface level, and described low pressure detected gas inlet port and high pressure detected gas escape hole position are higher than a described high pressure liquid import and a leakage fluid dram.
Described pressurized container is that the structure of non-body also can be to have two ports, and the superposed porting of the first is about to high-pressure exhaust and low-pressure gas import and merges into a gas port.This gas port is divided into two interfaces after connecting a high voltage bearing threeway, connects high-pressure exhaust pipe and low-pressure inlet pipe respectively.On low-pressure inlet pipe, establish the retaining valve and the operation valve that end to the source of the gas direction from pressurized container; On high-pressure exhaust pipe, establish control valve member and blowdown valve; If card envelope instrument is to block envelope with detected gas, then add a threeway on the high-pressure exhaust pipe behind the operation valve again, the card envelope fluid inlet end on an interface Connection Card of all the other of this threeway envelope instrument; It two is the leakage fluid drams that advance that are positioned at the bottom, is about to high pressure liquid import and leakage fluid dram and merges into a liquid mouth.This liquid mouth is divided into two interfaces after connecting a high voltage bearing threeway, connects described feed tube and discharging tube respectively.Retaining valve and the operation valve that ends to the water pump direction from pressurized container is set on feed tube, on discharging tube, establishes the control valve member; If card envelope instrument is that water blocks envelope, then on feed tube, add a threeway again, interface of all the other of threeway is established operation valve and blowdown valve by pipeline Connection Card sealing fluid inlet end on it.
One wire rope is fixed on the card envelope instrument, so that instrument is proposed and put into pipe string to be measured inside; The detected set air-casing is used to cover on the detected part outside, collects from detecting the detected gas that reveal at the position.
Described power section comprises engine or the motor that power is provided, and can also comprise the hydraulic pump and the pneumatic pump that may need in the use.
Equipment in this leak hunting method can also comprise control desk.Each control element of control desk boundling, each operation valve in the connection leak test plant and the power switch element of power section.
Detecting instrument is the high sensitivity instrument that can detect the detected gas concentration change delicately.
The detected gas accumulator that is used for the gases at high pressure leak hunting method provided by the invention, producing highly pressurised liquid by high-pressure hydraulic pump is input in the pressurized container of accumulator, highly pressurised liquid forms the detected gas in the liquid piston extruding pressurized container, make its pressure can be elevated to desired high pressure rapidly, the high pressure detected gas is transported in the plenum space between testing tool and the position to be checked by high pressure line, thereby just can make things convenient for, measure reliably tested position whether leakage is arranged.Carry high pressure liquid stream to improve the air pressure of detected gas by high-pressure hydraulic pump to accumulator in this method, as long as select suitable water pump, just the pressure of gas in the accumulator can be elevated to setting value, and, can improve the pressure of detected gas in the accumulator fast and efficiently by such step-up method.Use this method, each detection time can finish in 1-2 minute.And existing other detection technique each detection time is no less than 10 minutes, and does not reach very high gas detection pressure.
The present invention will be further described below by drawings and Examples.
Description of drawings
Fig. 1 is the structural representation of used accumulator and propulsion system in the leak hunting method of gases at high pressure efficiently provided by the invention;
Fig. 2 be include as described in Figure 1 accumulator, propulsion system and source of the gas and the structural representation of an embodiment of testing tool;
Fig. 3 is the structural representation of a kind of embodiment of used card envelope instrument in the leak hunting method of gases at high pressure efficiently provided by the invention;
The pipeline structure synoptic diagram of accumulator when Fig. 4 passes through to constitute plenum space in as shown in Figure 3 the card sealing for utilizing detected gas in the leak hunting method provided by the invention;
Fig. 5 is the pipeline structure synoptic diagram of accumulator for utilizing the high-pressure hydraulic pump that produces the high pressure detected gas to charge into liquid formation plenum space in the leak hunting method provided by the invention in the card sealing.
Embodiment
The detected gas accumulator that is used for the gases at high pressure leak hunting method provided by the invention comprises a power section and an accumulator
Power section, it comprises a water pump, water pump uses engine to be suitable for site work in the open air by engine or motor-driven;
Described testing tool comprises card envelope instrument and detected set air-casing.
Accumulator comprises a pressurized container, and high pressure detected gas escape hole and low pressure detected gas inlet port are arranged on it, and high pressure detected gas escape hole is connected with testing tool by high-pressure exhaust pipe, and low pressure detected gas inlet port is connected with source of the gas by draft tube; The pressurized container lower end is provided with a highly pressurised liquid import and a leakage fluid dram, and this high pressure liquid import exports by the high pressure liquid that feed tube connects the power section water pump, and leakage fluid dram connects discharging tube.Be provided with the control corresponding valve member on each connecting line, high pressure liquid enters and discharges this pressurized container and low-pressure gas enters pressurized container and gases at high pressure enter testing tool from the pressurized container discharge to control; If card envelope instrument is to block envelope with detected gas, then threeway of the company of inserting behind the operation valve on the high-pressure exhaust pipe increases an interface by threeway, comes the card envelope import on the Connection Card envelope instrument; If card envelope instrument is to block envelope with liquid, then threeway of the company of inserting on feed tube, an interface Connection Card sealing liquid fluid line of increase is established operation valve and blowdown valve on it;
Card envelope instrument is arranged on the inside of tubing string to be detected or string of casing or auxiliary pipe, is positioned the both sides of the connecting thread button part that may leak to be checked, in order to set up the interior confined space that can charge into detected gas or to claim plenum space; Described detected set air-casing is arranged on tubing string or string of casing or aid outside, is positioned the connecting thread button position that may leak, and it is covered in wherein, and foundation can detect the outside confined space of leakage or claim to detect the space.High-pressure exhaust pipe on the pressurized container of plenum space and accumulator links, and makes the high pressure detected gas enter.Detecting the space links by pipeline and detecting instrument.
Concrete equipment as shown in Figure 1, the accumulator in this equipment comprises a pressurized container 1, it is a body, is made by the high-quality steel, good mechanical property has higher load performance.Use described body to make described pressurized container, one port of this body constitutes described low pressure detected gas inlet port and high pressure detected gas escape hole, the another port constitutes a described high pressure liquid import and a leakage fluid dram, descending in a last and described high pressure liquid import and a leakage fluid dram in order to ensure described low pressure detected gas inlet port and high pressure detected gas escape hole, then described body is and surface level has the oblique placement in certain inclination angle.The preferred 10-60 in described angle of inclination °.
Concrete, as shown in Figure 1, comprise on this pressurized container 1 that an air inlet/outlet 11 and a high pressure liquid advance leakage fluid dram 12, this high pressure liquid is advanced an interface that connects a three-way piece 120 on the leakage fluid dram 12, all the other two interfaces, one of them is a high pressure liquid inlet 121, connect feed tube L1, it is provided with the retaining valve F1 that ends to the water pump direction from pressurized container and also passes through the high pressure liquid outlet that pipeline L1 connects water pump 2, second interface is liquid return hole 122, connect discharging tube L2, connect operation valve D1 on it and also be connected with the liquid return hole of water tank 21 by discharging tube L2.An interface that connects a threeway 13 on the air inlet/outlet 11 on the pressurized container 1; Two other interface of this threeway, one is detected gas air intake opening 14, establish draft tube L3 on it and connect the helium source of the gas, in the instantiation air feed gas cylinder 6 (referring to Fig. 2), on this air intake opening, be provided with the retaining valve F2 that ends to the source of the gas direction from pressurized container, on draft tube L3, be provided with air intake control valve D5; Another interface in the threeway 13 is a gases at high pressure escape hole 15, connects high-pressure exhaust pipe L4, and it connects a testing tool 3 (referring to Fig. 2) by high-pressure exhaust pipe L4, is provided with an emptying branch road L5 on this pipeline.On high-pressure exhaust pipe L4, be provided with operation valve D4, on emptying branch road L5, be provided with emptying operation valve D3 (referring to Fig. 2);
In leak test plant as shown in Figure 2, this testing tool 3 comprises card envelope instrument 31 and detected set air-casing 32, the inside that described card envelope instrument 31 is arranged on tubing string or string of casing 4 or aid is positioned at the both sides of the part a that waits to hunt leak, described detected set air-casing 32 is arranged on tubing string or string of casing 4 or aid outside, to treat that the leak detection part covers in wherein, promptly constitute two seal cavities in the inside and outside both sides of waiting to hunt leak partly, in interior plenum space 41 and detection space 42 outside, and the adapter L4 on the gases at high pressure escape hole 15 on this plenum space 41 and the pressurized container 1 is communicated with, make the detected gas of high pressure enter into plenum space 41, detected set air-casing 32 is used for collecting from screw thread reveals and enters the detected gas that detects space 42, passes through pipeline 51 joint detection gas detecting instruments 5 by interface 321 on detection space 42.
Gases at high pressure escape hole 15 connecting line L4 on the pressurized container 1, and penetrate hermetically between 31 to two cards of card envelope instrument sealing, gases at high pressure passage thus enter in the plenum space 41.The two-port of detected set air-casing 32 is close to the both sides that outer wall is arranged on threaded joints, thus, on oil pipe or sleeve pipe 4, constitute inside and outside two seal cavities, that is: plenum space 41 and one detect space 42, be provided with interface 321 on gas collection cover 32, it connects the interface 51 of a leak locator or mass spectrometer 5.
When using above-mentioned accumulator to hunt leak, open operation valve D5, from gas cylinder 6, emit detected gas--helium, inject detected gas by pipeline L3 in the pressurized container 1 of described accumulator; Start high-pressure hydraulic pump 2, high pressure liquid stream is entered the pressurized container 1 from the accumulator bottom by pipeline L1 and retaining valve F1, compression detected gas wherein is to detecting required set pressure; In this simultaneously, on connecting portion to be checked on equipment or the pipeline, set up described plenum space and detection space; The description that this step is specifically seen below.
Open the gases at high pressure escape hole on the pressurized container, that is: opening controlling valve D4, the described plenum space 41 of the high pressure detected gas in the pressurized container 1 being sent into card envelope instrument 31 forms high pressure, when plenum space 41 pressure reach the design detected pressures, stops to supply gas; Leave standstill certain hour, whether the detecting instrument detection that transference detects the space connection has detected gas to enter into detection space 42 from plenum space 41 by detected part a, under the design detected pressures whether leakage is arranged thereby determine detected part a.
After the leak detection of a detection of pipe string position a is finished, open the operation valve D1 discharge opeing on the leakage fluid dram of pressurized container, discharging liquid wherein, close discharge opeing operation valve D1 then, allow the high pressure detected gas turn back to pressurized container from plenum space automatically, step-down is a low-pressure gas, closes the pressurized container exhausr port and promptly closes operation valve D4 on the high pressure gas pipeline, open the bleed-off valve D4 that is provided with to the high pressure line between the plenum space from the pressurized container exhausr port, drain its inner unnecessary low pressure detected gas; Remove the card envelope of testing tool, described testing tool is taken out from detecting the position.
After the leak detection at a detection of pipe string position is finished, to block envelope testing tool card envelope instrument and detected set air-casing again and move on to another leak detection position, to block the envelope instrument and be arranged on described plenum space of formation and detection space on this leak detection position, repeat said method then.
Described card envelope instrument can be to be converted to axial thrust by the pressure that injects fluid, and then is converted to the card sealing that radial force makes it to expand.On two card sealings, be provided with fluid inlet, during use, in the card sealing, feed gas or liquid, make this card sealing expand, thereby in tubing string, wait to hunt leak both sides, position shutoff pipe, form plenum space.And the pipeline that feeds detected gas in plenum space passes one of them card sealing and plenum space UNICOM.
During the described card envelope instrument of use by the card sealing that injects fluid and expand, in the described leak hunting method, increase a step of setting up plenum space, be about to card envelope instrument and be arranged in the tubing string, two cover card sealings are positioned to detect the both sides at position, then, in the card sealing, inject fluid, packing element in the card sealing is expanded,, form airtight plenum space until being adjacent to tube wall.
Described card envelope instrument can be as shown in Figure 3, comprises that two cover card sealings 33 and newel 310, two cover card sealings 33 are sleeved on the rigid central post 310, are symmetrical distribution.Two packing elements 332 that every cover card sealing 33 is stacked up and down by a rigidity sliding sleeve 331, one group and elasticity control loop 333 are preferably formed.Elasticity control loop 333 outside in the two cover card sealings 33, sliding sleeve 331 is clipped in the middle packing element 332 interior.
Be installed with plug 335 at the two ends of newel 310, sheathed locating sleeve 336 on newel between the two cover card sealings 33, this plug and locating sleeve and newel are fixing can not to slide.Make elasticity control loop 333, sliding sleeve 331 and packing elements 332 in the two secondary card sealings 33 be limited in the zone on the newel 310 by plug 335 and locating sleeve 336, sliding sleeve 331, packing element 332 can have certain axial displacement along newel 310.
The card of this card sealing envelope principle is: when fluid enters from fluid intake e in the described cavity b, hydrodynamic pressure promotes sliding sleeve and endwisely slips, thereby extruding packing element 332 is radially expanded, and can realize that card seals.After fluid is discharged from fluid intake e, when control loop 333 loses the state of axial force at sliding sleeve 331, provide enough auxiliary packing elements 332 of elastic force axially to reset, the card envelope is removed.If the elasticity control loop is not set, packing element 332 also can be realized radially resetting by self elasticity.
If the fluid that feeds in the card sealing is a water, then will be with setting-out to inject the card sealing by a water pump.
If the fluid that feeds in the card sealing is a water, then will be with setting-out to inject the card sealing by a water pump.Topping up body in the card sealing sliding sleeve cavity of card envelope instrument, promptly connect high-pressure liquid tube in the import setting of a card envelope instrument, the other end of high-pressure liquid tube connects water pump, and this water pump can be the water pump that water under high pressure is provided to pressurized container, also can be other water pump; Before step 3, open this water pump, to card sealing internal-filling liquid, be adjacent to tube wall until the card sealing, form plenum space.
In the card sealing, import water under high pressure if utilize the water pump 2 that water under high pressure is provided in increasing container, then its device as shown in Figure 5, on the fluid pipeline of the high pressure liquid entrance sleeve L1 of pressurized container 1 or high-pressure hydraulic pump, pick out an arm L1a, establish operation valve D6 on this arm, operation valve D6 back connects two arms by threeway, wherein arm is connected to the import that the seat envelope import c of card sealing in the testing tool as shown in Figure 3 promptly blocks sealing, another root pipe is a relief tube, establishes a draw-off valve D7 on it.Improve wherein to pressurized container input water under high pressure that detected gas pressure by arm L1a water-filling in the card sealing, is adjacent to tube wall until the card sealing in design pressure carrying out step 2, form plenum space, stop to supply water to the card sealing by operation valve.Provide the step of water under high pressure constant to pressurized container.After testing is finished, open draw-off valve D7, the water in the card sealing is discharged, the card sealing can be pulled down.Use above-mentioned card envelope instrument, current are by the road: to arm L1a, the import c to the card envelope instrument plug 335 is again to setting interior import e of sliding sleeve and sliding sleeve cavity b from the high pressure liquid entrance sleeve L1 of pressurized container.Mobile compression packing element by sliding sleeve expands.When carrying out step 2 design pressure, water-filling in the card sealing is adjacent to tube wall until card sealing packing element, forms plenum space.The water pump that remains in operation again reaches design pressure until pressurized container;
After the leak detection at a detection of pipe string position is finished, open draw-off valve D7, the water in the card sealing is emitted, to unload described card envelope instrument.At this moment, will block the envelope instrument and move on to after another detects position, will in the card sealing, charge into fluid earlier, set up plenum space, in it, charge into the detected gas of set pressure again at the leak detection position.
The fluid that feeds in the card sealing also can be a gas, by an air pump with in the gas input card sealing.
If utilize the detected gas in the pressurized container to make the packing element in the card sealing expand, then its device as shown in Figure 4, on the basis of earlier figures 1, on high-pressure exhaust pipe L4, connect a threeway, three connect a high pressure gas exhaust outlet L4 ' by this, a threeway is set on this arm L4 ' again picks out two pipeline sections, first high pressure gas vent pipe, be connected to and block envelope instrument seat of honour envelope import c as shown in Figure 3, it two is relief tubes, establish operation valve D8 on this arm L4 ', connect blowdown valve D9 on the relief tube.During use, in described leak hunting method, between step 2 and step 3, increase a step of setting up plenum space 41, be about to card envelope instrument and be arranged in the tubing string, two cover card sealings are positioned to detect the both sides at position, and the high pressure gas vent pipe that arm L4 ' connects connects the import c on the plug 335.In step 2, when the air pressure of detected gas in the pressurized container reaches the required pressure of card sealing card envelope, this detected gas is fed the card sealing, sliding sleeve is endwisely slipped, the extruding packing element expands, and is adjacent to tube wall until reaching packing element, forms till the airtight plenum space.Closed control valve D8 then, continue completing steps 2 more as described above, in pressurized container, inject liquid by high-pressure hydraulic pump 2, reach the required set pressure of leak detection up to wherein air pressure, the detected gas under plenum space input set pressure as described above just then, also can be after plenum space is set up on one side by high-pressure hydraulic pump to the detected gas supercharging in the pressurized container, on one side import detected gas to plenum space, reach set pressure up to the pressure of plenum space.After testing is finished, can open blowdown valve D9, with the gas emptying in the card sealing.
In this preferred version, after a leak detection position leak detection is finished,, will block sealing and take off by dischargeing the gas in the card sealing.The detected gas of plenum space be should put during operation earlier,, gas or liquid in the card sealing discharged again up to the pressure and the atmospheric pressure balance of plenum space.
When being hunted leak in another position if desired, should block sealing and be arranged on this place, repeat above-mentioned steps, if the air pressure in the pressurized container is set pressure, then wherein gas charges in the card sealing sliding sleeve cavity, set up plenum space at the detection position, in plenum space, charge into detected gas again and hunt leak.If air pressure is lower in the pressurized container, then need to switch on the pump, make that the air pressure in the pressurized container reaches the pressure that needs.
Using described card envelope instrument and using detected gas is a preferable scheme as the card envelope fluid in the card sealing.
Described detected gas can be helium, argon gas and other inert gases, preferred helium.Be the saving cost, the mixed gas of available helium and nitrogen, concentrations of helium is not less than 5%, and helium is a tracer gas.Be complementary with it, detect the concentrations of helium that detects in the space by detecting instrument and whether surpass normal concentrations of helium in the air, the decidable detected part has or not leakage according to this, and according to the variable quantity of concentrations of helium, the degree that quantitative test is leaked.
When adopting above-mentioned preferred version, dismounting card sealing better method is by the draining valve on the pressurized container is opened, the detected gas that air pressure in the pressurized container is reduced in the relief card sealing is back in the pressurized container, and this is significant for for example using valuable tracer gas such as helium.Particularly, can be earlier by the liquid in the operation valve D1 discharging pressurized container 1, reduce the pressurized container internal pressure, open operation valve D8 and D4 again, like this, plenum space or will flow back in the pressurized container together with the detected gas in the card sealing.
Above-mentioned each operation valve can be a solenoid electric valve, also can be pneumatic control valve, if solenoid electric valve, each solenoid electric valve connects control circuit, if pneumatic control valve, each pneumatic control valve also will connect pneumatic pipeline, and pneumatic pump is set the control source of the gas is provided.In as the equipment of Fig. 1, also comprise a control desk 7, which is provided with circuit board and connect each electromagnetism or pneumatic control valve, by the operating key 1,2,3,4,5 of the control panel on the operating console, can correspondingly control corresponding electromagnetism or pneumatic control valve, implement following leak hunting method.
These gases at high pressure can use according to the purposes associated line, and it is one of purposes that the present invention is used for leak detection, can also be used for other purposes, for example is used for the pressure testing of pressure vessel etc.
This is gases at high pressure leak hunting method following (with reference to Fig. 2) efficiently:
In order to guarantee that air water does not mix, in step 1, the admission pressure of pressurized container or air inflow also are to need control, and the size of this air inflow or admission pressure is that the external diameter of the volume according to pressurized container, the size of detected pressures, the internal diameter that detects oil pipe (sleeve pipe), card envelope instrument waits and measures.Total requirement is a water breakthrough not in the card envelope instrument when detecting, water breakthrough whether when seeing card envelope instrument deblocking, and throughput is advisable with water breakthrough not.
These gases at high pressure can use according to the purposes associated line, and it is one of purposes that the present invention is used for leak detection, can also be used for other purposes, for example is used for the pressure testing of pressure vessel etc.
After the leak detection at a detection of pipe string position is finished, the gas in plenum space and the card sealing sliding sleeve internal cavity is emitted.If the gas in plenum space and the card sealing sliding sleeve cavity is sent back in the pressurized container, way is: the control valve member D1 on the opening water discharge pipe L2 at first, discharge a part of water in the pressurized container, open the control valve member D4 on the high-pressure exhaust pipe again, can make the gas in the plenum space get back in the pressurized container 1, open operation valve D8 again, can make that the detected gas among the cavity b is got back in the pressurized container 1.
Gas and liquid do not mix when making high pressure liquid for the supercharging of the detected gas in the pressurized container, in addition, for guaranteeing that the high pressure detected gas of emitting does not contain liquid and boosts efficient more, quick, the preferred withstand voltage body of pressurized container, tilt to place, and the inclination angle of surface level is preferably between 10-60 °, and the high pressure liquid inlet is arranged on the below of pressurized container, and the gases at high pressure exhausr port is positioned at the top of pressurized container.Tilting purpose is after high pressure liquid enters pressurized container, realizes gas-water separation by action of gravity, and high pressure liquid enters and forms liquid piston in the pressurized container, promotes the detected gas compression.
When described pressurized container when being two or more, as shown in Figure 5, feeding detected gas on each described pressurized container 1, output reaches the detected gas of set point pressure, described liquid enter and discharge each import and export equal correspondence and be connected in parallel, at this moment, in described pressurized container, squeezing into highly pressurised liquid after a period of time, stop to need to leave standstill a period of time behind the pumping liquid, make the liquid in each described pressurized container reach balance, connecting portion carries out the sealing detection on equipment or pipeline then, and/or, continue pumping liquid, continue to improve the pressure of the detected gas in the described container.In the embodiment shown in fig. 5, be that two ports of pressurized container 1 that body is made couple together respectively, pick out two house stewards, one connects threeway 13, take over road L3 and L4 as described above, another house steward connects threeway 120, takes over road L1 and L2 more as described above.
The described time that stops is 20-30 second; Or, reach unanimity with the pressure on each tensimeter and be advisable by observing the tensimeter that is provided with on each described container.
Claims (10)
1. detected gas accumulator that is used for the gases at high pressure leak hunting method is characterized in that: comprise a power section and a pressurized container,
Described power section comprises a water pump;
Described pressurized container, there are low pressure detected gas inlet port and high pressure detected gas escape hole in its upper end, low pressure detected gas inlet port is connected with source of the gas by draft tube, high pressure detected gas escape hole is connected with testing tool by high-pressure exhaust pipe, the pressurized container lower end is provided with a high pressure liquid import and a leakage fluid dram, this high pressure liquid import exports by the high pressure liquid that feed tube connects described water pump, connects discharging tube on the leakage fluid dram; On each connecting line, be provided with the control corresponding valve member, enter and discharge this pressurized container with the control high pressure liquid, and low-pressure gas enter pressurized container and gases at high pressure are discharged from pressurized container.
2. the detected gas accumulator that is used for the gases at high pressure leak hunting method according to claim 1, it is characterized in that: described pressurized container is a body, one port of this body constitutes described low pressure detected gas inlet port and high pressure detected gas escape hole, connects described draft tube and high-pressure exhaust pipe by a threeway on this port; The another port of this body constitutes a described high pressure liquid import and a leakage fluid dram, connects described feed tube and discharging tube by a threeway; Described body is for having the oblique placement in certain inclination angle with surface level, and described low pressure detected gas inlet port and high pressure detected gas escape hole position are higher than a described high pressure liquid import and a leakage fluid dram.
3. the detected gas accumulator that is used for the gases at high pressure leak hunting method according to claim 1 is characterized in that: two mouths are set on the described pressurized container:
The one, superposed porting is about to described high-pressure exhaust and low-pressure admission mouth and merges into a gas port, is divided into two interfaces after this gas port connects a threeway, connects described high-pressure exhaust pipe and described draft tube respectively; On high-pressure exhaust pipe, establish the control valve member;
The 2nd, be positioned at the leakage fluid dram that advances of bottom, be about to high pressure liquid inlet and leakage fluid dram and merge into a liquid mouth, after connecting a threeway, this liquid mouth is divided into two interfaces, connect described feed tube and discharging tube respectively; On discharging tube, establish the control valve member.
4. the detected gas accumulator that is used for the gases at high pressure leak hunting method according to claim 2 is characterized in that: the angle of described body and surface level is 10-60 °.
5. according to claim 1 or the 2 or 3 described detected gas accumulators that are used for the gases at high pressure leak hunting method, it is characterized in that: described draft tube is provided with retaining valve, and its circulating direction is for being conducting from the source of the gas to the pressurized container.
6. according to claim 1 or the 2 or 3 described detected gas accumulators that are used for the gases at high pressure leak hunting method, it is characterized in that: described feed tube is provided with retaining valve, and its circulating direction is for being conducting from the high pressure liquid of described water pump outlet to described pressurized container.
7. according to claim 1,2, the 3 or 4 described detected gas accumulators that are used for the gases at high pressure leak hunting method, it is characterized in that: on described feed tube, pick out a high pressure liquid branch road and be used for being connected, on this high pressure liquid branch road operation valve is set with the import of the card sealing of testing tool; On this high pressure liquid branch road, be provided with the branch road that discharges water, on this discharges water branch road, draw-off valve be set.
8. according to claim 1,2, the 3 or 4 described detected gas accumulators that are used for the gases at high pressure leak hunting method, it is characterized in that: on described gas outlet, set up a branch road, be used for being connected, on this branch road operation valve be set with the import of testing tool card sealing; On this branch road, also be provided with an emptying branch road, on this emptying branch road, be provided with atmospheric valve.
9. the detected gas accumulator that is used for the gases at high pressure leak hunting method according to claim 1, it is characterized in that: described pressurized container is two or more, described low pressure detected gas inlet port on each described pressurized container, high pressure detected gas escape hole, high pressure liquid import and leakage fluid dram are in parallel respectively, and the difference correspondence connects described draft tube, high-pressure exhaust pipe, feed tube and discharging tube on each house steward in parallel.
10. the detected gas accumulator that is used for the gases at high pressure leak hunting method according to claim 2, it is characterized in that: described body comprises two or more, two ports of each described body are in parallel respectively, and connect described draft tube and high-pressure exhaust pipe by described threeway on one after this parallel connection total the adapter; The total adapter upward of after the parallel connection another connects described feed tube and described discharging tube by described threeway.
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| CN200910086710XA CN101598625B (en) | 2009-06-19 | 2009-06-19 | Tracer gas accumulator applied in high pressure gas leak detection method |
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| CN200910086710XA CN101598625B (en) | 2009-06-19 | 2009-06-19 | Tracer gas accumulator applied in high pressure gas leak detection method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103234711A (en) * | 2013-04-15 | 2013-08-07 | 株洲南车时代电气股份有限公司 | Device and method for examining sealing performance of rubber hoses |
| CN107940241A (en) * | 2017-11-10 | 2018-04-20 | 中国石油天然气股份有限公司 | A kind of collection petroleum pipeline frozen block point position diagnostic system based on transient model |
| CN111473368A (en) * | 2019-01-24 | 2020-07-31 | 圣炉(深圳)贸易有限公司 | Safety device for gas stove |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201532287U (en) * | 2009-06-19 | 2010-07-21 | 安东石油技术（集团）有限公司 | Supercharging device for tracer gas in high-pressure gas leak detection method |
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2009
- 2009-06-19 CN CN200910086710XA patent/CN101598625B/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103234711A (en) * | 2013-04-15 | 2013-08-07 | 株洲南车时代电气股份有限公司 | Device and method for examining sealing performance of rubber hoses |
| CN103234711B (en) * | 2013-04-15 | 2015-12-23 | 株洲南车时代电气股份有限公司 | A kind of rubber hose sealing property verifying attachment and the method for inspection |
| CN107940241A (en) * | 2017-11-10 | 2018-04-20 | 中国石油天然气股份有限公司 | A kind of collection petroleum pipeline frozen block point position diagnostic system based on transient model |
| CN111473368A (en) * | 2019-01-24 | 2020-07-31 | 圣炉(深圳)贸易有限公司 | Safety device for gas stove |
| CN111473368B (en) * | 2019-01-24 | 2022-06-07 | 圣炉(深圳)贸易有限公司 | Safety device for gas stove |
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| CN101598625B (en) | 2011-10-19 |
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Assignee: SICHUAN ANTON OIL & GAS ENGINEERING TECHNOLOGY SERVICE CO.,LTD. Assignor: Anton Oilfield Services (Group) Ltd. Contract record no.: 2011990001089 Denomination of invention: Tracer gas accumulator applied in high pressure gas leak detection method Granted publication date: 20111019 License type: Exclusive License Open date: 20091209 Record date: 20111213 |
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Application publication date: 20091209 Assignee: SICHUAN ANTON OIL & GAS ENGINEERING TECHNOLOGY SERVICE CO.,LTD. Assignor: Anton Oilfield Services (Group) Ltd. Contract record no.: 2018990000003 Denomination of invention: Tracer gas accumulator applied in high pressure gas leak detection method Granted publication date: 20111019 License type: Common License Record date: 20180108 |
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Effective date of registration: 20191015 Address after: 841600 the Xinjiang Uygur Autonomous Region Bayinguoleng Mongolia Autonomous Prefecture Luntai County Hongqiao petroleum service area Patentee after: XINJIANG TONG'AO OIL FIELD TECHNOLOGY SERVICE Co.,Ltd. Address before: 100102, No. 8 Tsui Xi Road, East Lake, Beijing, Chaoyang District Patentee before: ANTON OILFIELD SERVICES (GROUP) Ltd. |
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Address after: 841600 Hongqiao petroleum service area, Luntai County, Bayingolin Mongolian Autonomous Prefecture, Xinjiang Uygur Autonomous Region Patentee after: Tongao Testing Co.,Ltd. Address before: 841600 Hongqiao petroleum service area, Luntai County, Bayingolin Mongolian Autonomous Prefecture, Xinjiang Uygur Autonomous Region Patentee before: XINJIANG TONG'AO OIL FIELD TECHNOLOGY SERVICE Co.,Ltd. |
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Address after: 841600 National Highway 314 Chengdong Development Zone Tongao company, Luntai County, Bayingolin Mongol Autonomous Prefecture, Xinjiang Uygur Autonomous Region Patentee after: Tongao Testing Group Co.,Ltd. Address before: 841600 Hongqiao petroleum service area, Luntai County, Bayingolin Mongolian Autonomous Prefecture, Xinjiang Uygur Autonomous Region Patentee before: Tongao Testing Co.,Ltd. |
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