CN110130868A - A kind of shale gas desanding separation system and method - Google Patents
A kind of shale gas desanding separation system and method Download PDFInfo
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- CN110130868A CN110130868A CN201910418431.2A CN201910418431A CN110130868A CN 110130868 A CN110130868 A CN 110130868A CN 201910418431 A CN201910418431 A CN 201910418431A CN 110130868 A CN110130868 A CN 110130868A
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- 238000000926 separation method Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title abstract description 11
- 239000004576 sand Substances 0.000 claims abstract description 42
- 239000013049 sediment Substances 0.000 claims abstract description 41
- 239000007791 liquid phase Substances 0.000 claims abstract description 40
- 239000012071 phase Substances 0.000 claims abstract description 24
- 238000005259 measurement Methods 0.000 claims abstract description 23
- 230000001105 regulatory effect Effects 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 238000012423 maintenance Methods 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 238000000151 deposition Methods 0.000 claims description 11
- 230000008878 coupling Effects 0.000 claims description 9
- 238000010168 coupling process Methods 0.000 claims description 9
- 238000005859 coupling reaction Methods 0.000 claims description 9
- 238000007689 inspection Methods 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 7
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 claims description 3
- 230000008021 deposition Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 230000035939 shock Effects 0.000 claims description 3
- 239000003638 chemical reducing agent Substances 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims description 2
- 230000008719 thickening Effects 0.000 claims description 2
- 239000007789 gas Substances 0.000 abstract description 43
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 238000001914 filtration Methods 0.000 abstract description 7
- 238000004062 sedimentation Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 239000007792 gaseous phase Substances 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 2
- 230000008676 import Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 241000191291 Abies alba Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a kind of shale gas desanding separation system and methods, system includes desanding filter element and separate measurement unit, the desanding filter element mainly includes the expanding pipeline section of desanding and desanding branch pipe, inlet and outlet shut-off valve, conical filter element, differential pressure alarm, and gas-liquid separation is measured after realizing desanding；The separate measurement unit mainly includes separator, unstripped gas entrance shut-off valve, gaseous phase outlet shut-off valve, gas phase flow rate meter, blowoff line and desanding branch pipe, liquid-phase outlet emergency shutdown valve, liquid phase flowmeter, liquid phase regulating valve and its front and back Shuttoff Valve, meets gas-liquid separation metering and further desanding requirement.The present invention passes through being applied in combination for two units, has actually carried out the three-levels desanding process such as sand sedimentation, filtering, separation, and while simplifying desanding device, desanding effect and efficiency are greatly improved；Setting depending on pipe more can effectively monitor desanding settling section effect, while be separated during normal sediment outflow, realize that sediment outflow does not stop production, optimize and simplify operation.
Description
Technical field
The present invention relates to a kind of shale gas well head desanding and isolated system and methods.
Background technique
Shale gas is played an important role in global energy structure as huge potential unconventional gas resource.I
State's shale gas is resourceful, has started to carry out the trial of shale gas field face engineering development, surface gathering and transferring technique, which is also at, explores rank
Section, it is also necessary to advanced optimize to realize that large-scale low-cost is developed.In the shale gas ground surface works carried out at present, well head collection is defeated
Technique mainly includes desanding and separate measurement.
Shale gas needs desanding, is to cause instead to arrange sand production rate since shale gas exploitation needs sand fracturing to improve yield
Greatly, solid phase impurity will denude pipeline, equipment, instrument, can also block valve, pipeline, or even influence normal production.Usually close
Desander filter is set after the level-one throttle valve of well head christmas tree, well head output gas is filtered, is entered back into down after filtering
Processing equipment is swum, in order to avoid follow-up equipment is impacted.But it is arranged in desander in current craft lectotype to realize efficient desanding
Inner member (silk screen filter basket), the inner member due to underground impurity is more easily be blocked, maintenance and the operation and maintenance frequency it is high and
It is more troublesome, equipment investment and personnel's maintenance cost are higher.
Separation and metering are usually required after shale gas desanding.The anti-displacement of shale gas is larger, and gathering and transportation technology usually recommends gas
The defeated mode of movement of liquid point, avoids collecting pipe liquid holdup excessive, therefore, need to isolate gas phase and liquid using two phase separator
Phase.Since current shale gas is generally in early development, in conjunction with pilot production requirement, consider that flow is respectively set in gas phase and liquid phase
Meter, for collecting gas well extraction situation.Current design is able to satisfy requirement, and reliability is poor in operation, is easy because of upstream desanding
Effect is bad and carries impurity, and then blocks liquid outlet pipe, needs stop production to overhaul or setting bypass/spare separator.
Summary of the invention
The shortcomings that in order to overcome the prior art, the present invention provides a kind of shale gas desanding separation system and method, for
The characteristics of shale gas well, design provide the stronger shale gas desanding isolation technics of more succinct and reliable operation, are protecting
Under the premise of demonstrate,proving economy, desanding again while realizing the effective desanding of desanding section and online sediment outflow and separate measurement, and it is big
Reduce repair and maintenance workload greatly.
The technical scheme adopted by the invention is that: a kind of shale gas desanding separation system, including desanding filter element and point
From metering units；The desanding filter element includes the expanding pipeline section of desanding and desanding branch pipe, in the upstream and downstream of the expanding pipeline section of desanding
Inlet and outlet shut-off valve is respectively set, conical filter element is set in desanding expanding pipeline section downstream, is set before and after conical filter element
Set differential pressure alarm；The separate measurement unit includes separator, is set respectively on separator inlet pipeline and gas phase export pipeline
Posting port shut-off valve and gaseous phase outlet shut-off valve, are arranged gas phase flow rate meter in separator gas phase, and blowdown is arranged in separator liquid phase
Pipeline and desanding branch pipe, set gradually on blowoff line liquid-phase outlet emergency shutdown valve, liquid phase flowmeter, liquid phase regulating valve and
Its front and back Shuttoff Valve, is arranged in parallel before Shuttoff Valve and after liquid phase regulating valve after Shuttoff Valve before liquid phase regulating valve
Overhaul blowdown valve；The outlet shut-off valve of the desanding filter element is connect with the entrance shut-off valve of the separate measurement unit；?
It is respectively provided with view pipe on the desanding branch pipe of desanding filter element and separate measurement unit, regards pipe upper end as desanding shut-off valve, lower end is
Desanding mouth.
The invention also discloses a kind of shale gas desanding separation methods, including following content:
One, the operation of desanding filter element:
(1) when normal operating, entrance shut-off valve, outlet shut-off valve, desanding shut-off valve is opened, the valve of desanding rinse mouth is closed
Door, desanding mouth are isolated by blind flange, when regarding pipe display sand amount and depositing to close to desanding shut-off valve, into sediment outflow operation；
(2) when sediment outflow operates, it is simply turned off desanding shut-off valve, keeps entrance shut-off valve and outlet shut-off valve to open, opening is removed
Sand mouth sediment outflow.When depositing gravel inconvenience discharge, water source is connected by desanding rinse mouth quick coupling and helps sediment outflow of washing by water；Desanding
After, enabling state；
(3) inspection operation is carried out when differential pressure warning note pressure difference is excessive: being closed entrance shut-off valve, outlet shut-off valve, is removed
Sand shut-off valve takes out the cleaning blocking of conical filter element；
Two, the operation of separate measurement unit:
(1) when normal operating, entrance shut-off valve, outlet shut-off valve, desanding shut-off valve is opened, the valve of desanding rinse mouth is closed
Door, desanding mouth are isolated by blind flange；Drain is carried out by the aperture that liquid level regulating controller adjusts liquid phase regulating valve, after separation
Liquid phase pass through gas phase flow rate meter respectively and liquid phase flowmeter is measured；It is closed when showing that sand amount is deposited to close to desanding depending on pipe
When disconnected valve, operated into sediment outflow；
(2) when sediment outflow operates, it is simply turned off desanding shut-off valve, keeps the normal valve position of other valves, opens desanding mouth sediment outflow,
When depositing gravel inconvenience discharge, water source is connected by desanding rinse mouth quick coupling and helps sediment outflow of washing by water；It is extensive after desanding
Multiple normal operating state；
(3) it when inspection operation, closes before and after entrance shut-off valve, outlet shut-off valve, desanding shut-off valve and liquid phase flowmeter
Valve, opens maintenance blowdown valve, and local checking maintenance work is carried out after blowdown.
Compared with prior art, the positive effect of the present invention is:
(1) simplify optimization system: the desanding filter element main structure is only expanding pipeline section, and no inner member will not block up
Plug without particular/special requirement in material, and is vessels not under pressure, can not be by pressure vessel normal constraint, no setting is required safety valve；Outlet
Removable conical filter element is added, desanding is assisted early period, can permanently be removed after the decline of later period sand amount；Desanding filter element and point
From unit, creatively setting view is managed, intuitive judgment sand amount and sediment outflow situation.
(2) desanding efficiency is high: due to being applied in combination for two units, actually having carried out the three-levels such as sand sedimentation, filtering, separation
Desanding process, desanding effect and efficiency greatly improve；Separated during normal sediment outflow, sediment outflow does not stop production；
(3) convenient for operation and management: desanding filter element and separate measurement unit are provided with gravel sedimentation, view pipe and punching
Wash mouth；Depending on pipe can intuitive judgment gravel settle situation, and realize online sediment outflow, flexible operation；Difference gauge can remotely monitor long-pending sand
It is safeguarded in time after situation.
(4) save the cost: after system optimization simplifies, can be improved the reliability of desander, reduce platform desander quantity, drop
Low facility cost；Checking maintenance workload reduces, and largely saves manpower.
(5) guarantee production capacity: online sediment outflow and maintenance work, guarantee system can be worked normally in sediment outflow, be provided for downstream
Stable gas source, and then guarantee system production capacity, while avoiding closing well and the existing risk that drives a well again after the completion of overhauling；
Detailed description of the invention
Examples of the present invention will be described by way of reference to the accompanying drawings, in which:
Fig. 1 is Y-shaped individual well desanding filter structure；
Fig. 2 is T-shape individual well desanding filter structure；
Fig. 3 is integrated gas-liquid separation desanding device.
Specific embodiment
A kind of shale gas desanding separation system, including desanding filter element and separate measurement unit, the desanding filtering are single
It is first main including the expanding pipeline section of desanding, conical filter element, desanding rinse mouth, view pipe, desanding mouth, inlet and outlet shut-off valve etc., it is full
Sufficient desanding filtering requirement.The separate measurement unit mainly includes separator body, desanding rinse mouth, view pipe, desanding mouth, gas phase
Flowmeter, liquid phase flowmeter, inlet and outlet shut-off valve, liquid phase quick action emergency valve, meet gas-liquid separation metering and further desanding is wanted
It asks.The outlet shut-off valve of the desanding filter element is connect by short tube with the entrance shut-off valve of separate measurement unit, and realization removes
Gas-liquid separation is measured after sand.
Hereinafter, being described in detail as follows respectively to two units:
The desanding filter element is as depicted in figs. 1 and 2, it is shown that desanding branch pipe and supervisor's asynchronous structure of angle,
Two kinds of setting angles are related with in-site installation condition, and preferred Y-shaped structure in the case that installation space allows more meets fluid stream
Dynamic characteristic.Desanding filter element specifically includes that the expanding pipeline section 2 of entrance shut-off valve 1, desanding, conical filter element 3, outlet shutdown
Valve 4, desanding shut-off valve 5, view pipe 6, desanding mouth 7, desanding rinse mouth 8, differential pressure alarm 9.Desanding expansion tube both ends concentric reducer is top
It flushes, both ends length of pipe section is more than or equal to 150mm, welds between each pipeline/part, and each valve and conical filter element flange connect
It connects.
In the desanding filter element, the expanding pipeline section 2 of desanding is in the nature expanding pipeline section, identical as upstream and downstream material, horizontal
Straight tube installation, and expanding length and Assurance of Size gas phase residence time are greater than the gravel sedimentation time；Gravel enters with shale gas to be removed
After the expanding pipeline section 2 of sand, flow velocity decline, gravel density is greater than water and is much larger than gas phase, expanding in desanding according to density variation gravel
It is quickly settled in pipeline section 2, and with flowing into desanding branch pipe.By still carrying a small amount of sand in the gas phase of sedimentation
Gravel, expanding 2 downstream of pipeline section of desanding set conical filter element 3, further stop the gravel for entering downstream.Conical filter element 3 is adopted
It is connected with dismountable flange, while front and back setting differential pressure alarms 9, it is how many according to gravel and gravel size determines whether that taper is arranged
Aperture mesh number on filter element 3 and conical filter element, also it is contemplated that early period is arranged, later period gravel is cancelled when reducing.It removes
Sand branch pipe can select Y-shaped or the installation of T-shape structure according to actual installation position, and the length of desanding branch pipe inner product sand section combines
Depending on sand content and operation；Artificial desanding is needed when product sand is close to desanding shut-off valve 5, product sand segment length and size are according to containing sand
Depending on amount, while configuring the reply gravel accumulation of desanding rinse mouth 8 and being difficult to the case where being discharged.
Separate measurement unit is as shown in Figure 3, comprising: entrance shut-off valve 21, separator protecting against shock thickening plate 22, gas phase flow rate
Meter 23, gaseous phase outlet shut-off valve 24, desanding shut-off valve 25, view pipe 26, desanding mouth 27, desanding rinse mouth 28, liquid-phase outlet are urgent
Shuttoff Valve 31, liquid phase regulating valve 32, liquid level regulating controller 33, liquid before shut-off valve 29, liquid phase flowmeter 30, liquid phase regulating valve
Shuttoff Valve 34, maintenance blowdown valve 35, separator 36, maintenance water filling port 37, emptying safety valve 38 after phase regulating valve.Each pipeline/
It is welded between part, each valve flanges connection.
Separate measurement unit meets the configuration and size requirement of typical separators first, while increasing entrance and exit folding
Plate extends disjoint paths, can reduce separator length, and increase separator protecting against shock in the corresponding chamber wall of inlet induction and thicken
Plate 22 effectively improves separator service life.Gas phase flow rate meter 23 and liquid phase flowmeter 30 is respectively set in gas phase and liquid phase, meets
The requirement of shale gas metrology and measurement.Liquid phase sets two-way blowdown respectively, meets normal production status and maintenance operating condition.This unit is special
It is consistent with the setting of above-mentioned desanding filter element to joined desanding branch pipe, desanding working principle and concrete operations, accumulates sand amount herein
Much smaller than upstream desanding fillter section, therefore desanding frequency declines.
The method except sand separation is carried out using above-mentioned desanding separation system, desanding filter element and separate measurement unit can lead to
It is too short to connect use in succession, consider that single shale gas platform well mouth number is more, can there are two or multiple desanding filter elements with point
Switching is combined from metering units to use.Individual unit operating method is specific as follows:
Concrete operations are as follows in desanding filter element:
(1) when normal operating, entrance shut-off valve 1, outlet shut-off valve 4, desanding shut-off valve 5 is opened, desanding rinse mouth 8 is closed
Valve, desanding mouth 7 pass through blind flange be isolated.Operator periodically passes through view pipe 6 and observes product sand section situation, and sand amount is deposited to connecing
When nearly desanding shut-off valve 5, operated into sediment outflow.
(2) when sediment outflow operates, it is simply turned off desanding shut-off valve 5, keeps entrance shut-off valve 1 and outlet shut-off valve 4 to open, opens
7 sediment outflow of desanding mouth.When depositing gravel inconvenience discharge, water source is connected by 8 quick coupling of desanding rinse mouth and helps sediment outflow of washing by water；
After desanding, it is re-closing off the valve of desanding rinse mouth 8 and the blind plate of desanding mouth 7, it is heavy that opening desanding shut-off valve 5 continues to collect
The gravel of drop.
(3) when inspection operation, when 9 prompt pressure difference of differential pressure alarm is excessive, conical filter element is blocked, and closes entrance at this time
Shut-off valve 1, outlet shut-off valve 4, desanding shut-off valve 5 take out conical filter element 3, cleaning blocking.When later period sand content is minimum,
Conical filter element 3 can permanently be taken away.
Concrete operations are as follows in separate measurement unit:
(1) when normal operating, entrance shut-off valve 21, outlet shut-off valve 24, desanding shut-off valve 25 is opened, desanding is closed and rinses
The valve of mouth 28, desanding mouth 27, which passes through blind flange, is isolated；The aperture of liquid phase regulating valve 32 is adjusted by liquid level regulating controller 33
Carry out drain.Liquid phase after separation passes through gas phase flow rate meter 23 respectively and liquid phase flowmeter 30 is measured.Operator is fixed
Phase observes product sand section situation by view pipe 26, when sand amount is deposited to close to desanding shut-off valve 25, operates into sediment outflow.
(2) when sediment outflow operates, it is simply turned off desanding shut-off valve 25, keeps the normal valve position of other valves, opens desanding mouth 27
Sediment outflow.When depositing gravel inconvenience discharge, water source is connected by 28 quick coupling of desanding rinse mouth and helps sediment outflow of washing by water；Desanding is complete
Bi Hou is re-closing off 27 blind plate of desanding rinse mouth valve 28 and desanding mouth, opens desanding shut-off valve 25.
(3) when inspection operation, entrance shut-off valve 21, outlet shut-off valve 24, desanding shut-off valve 25 and liquid phase flow are closed
Meter front and back valve 31 and 34, opens maintenance blowdown valve 35, and the laggard luggage of blowdown sets checking maintenance work.
The working principle of the desanding filter element is as follows:
(1) it when normal operating, imports and exports shut-off valve and desanding shut-off valve is kept it turning on, desanding rinse mouth and desanding mouth
It is physically isolated.Gravel is separated in product sand section deposition, the gravel that portion gas carries by conical filter, and operator periodically passes through
Product sand section situation is observed depending on pipe, when containing sand close to desanding shut-off valve, is operated into sediment outflow.
(2) when sediment outflow operates, on-line operation does not influence normal desanding filtering, desanding shut-off valve is simply turned off at this time, by removing
Sand mouth sediment outflow connects water source by desanding rinse mouth quick coupling when depositing gravel inconvenience discharge, opens rinse mouth valve side
Help bath sediment outflow；After desanding, it is re-closing off desanding rinse mouth valve and desanding mouth blind plate, opens desanding shut-off valve.
(3) when inspection operation, usually when conical filter element is blocked, differential pressure transmitter warning note can close at this time
Inlet and outlet shut-off valve, desanding shut-off valve to be closed, can be taken off conical filter element, cleaning blocks, meanwhile, when later period sand content is minimum,
Conical filter element can permanently be taken away, reduce crushing.
The working principle of the separate measurement unit is as follows:
(1) it when normal operating, imports and exports shut-off valve and desanding shut-off valve is kept it turning on, desanding rinse mouth and desanding mouth
It is physically isolated；Regulating valve is set on liquid phase pipeline, aperture is adjusted according to Liquid level, liquid, while the liquid phase after separation is discharged
It is measured respectively；The gravel of discharge is in long-pending sand section deposition, and operator periodically passes through view pipe and observes product sand section situation, when containing sand
When close to desanding shut-off valve, operated into sediment outflow.
(2) when sediment outflow operates, on-line operation does not influence normal desanding filtering, desanding shut-off valve is simply turned off at this time, by removing
Sand mouth sediment outflow connects water source by desanding rinse mouth quick coupling when depositing gravel inconvenience discharge, opens rinse mouth valve side
Help bath sediment outflow；After desanding, it is re-closing off desanding rinse mouth valve and desanding mouth blind plate, opens desanding shut-off valve.
(3) when inspection operation, import shut-off valve, gaseous phase outlet shut-off valve, desanding shut-off valve and liquid phase flowmeter are closed
Front and back valve, opens maintenance blowdown valve, and the laggard luggage of blowdown sets checking maintenance work.
Claims (10)
1. a kind of shale gas desanding separation system, it is characterised in that: including desanding filter element and separate measurement unit；It is described to remove
Sand filter element includes the expanding pipeline section of desanding and desanding branch pipe, and inlet and outlet shutdown is respectively set in the upstream and downstream of the expanding pipeline section of desanding
Valve is arranged conical filter element in the expanding pipeline section downstream of desanding, differential pressure is arranged before and after conical filter element and alarms；The separation
Metering units include separator, and entrance shut-off valve is respectively set on separator inlet pipeline and gas phase export pipeline and gas phase goes out
Mouth shut-off valve, is arranged gas phase flow rate meter in separator gas phase, blowoff line and desanding branch pipe is arranged in separator liquid phase, in blowdown
Liquid-phase outlet emergency shutdown valve, liquid phase flowmeter, liquid phase regulating valve and its front and back Shuttoff Valve are set gradually on pipeline, in liquid phase
It is arranged in parallel maintenance blowdown valve before regulating valve before Shuttoff Valve and after liquid phase regulating valve after Shuttoff Valve；The desanding
The outlet shut-off valve of filter unit is connect with the entrance shut-off valve of the separate measurement unit；In desanding filter element and separate measurement
It is respectively provided with view pipe on the desanding branch pipe of unit, regards pipe upper end as desanding shut-off valve, lower end is desanding mouth.
2. a kind of shale gas desanding separation system according to claim 1, it is characterised in that: the expanding pipeline section of desanding and up and down
It is identical to swim material, is horizontally mounted, both ends concentric reducer is that top flushes, and both ends connect length of pipe section with upstream and downstream more than or equal to 150mm.
3. a kind of shale gas desanding separation system according to claim 1, it is characterised in that: the desanding branch pipe relative to
The expanding pipeline section right angle setting of desanding forms T-shaped structure.
4. a kind of shale gas desanding separation system according to claim 1, it is characterised in that: the desanding branch pipe relative to
The expanding pipeline section inclination installation of desanding, forms Y-shaped structure.
5. a kind of shale gas desanding separation system according to claim 1, it is characterised in that: the conical filter element is adopted
It is connected with dismountable flange.
6. a kind of shale gas desanding separation system according to claim 1, it is characterised in that: be arranged on desanding branch pipe and remove
Sand rinse mouth connects water source by quick coupling.
7. a kind of shale gas desanding separation system according to claim 1, it is characterised in that: rushed in separator inlet fluid
Part setting protecting against shock thickening plate is hit, is respectively provided with folded plate in the bottom of separator inlet and outlet.
8. a kind of shale gas desanding separation method, it is characterised in that: including following content:
One, the operation of desanding filter element:
(1) when normal operating, entrance shut-off valve, outlet shut-off valve, desanding shut-off valve is opened, the valve of desanding rinse mouth is closed,
Desanding mouth is isolated by blind flange, when regarding pipe and showing that sand amount is deposited to close to desanding shut-off valve, into sediment outflow operation；
(2) when sediment outflow operates, it is simply turned off desanding shut-off valve, keeps entrance shut-off valve and outlet shut-off valve to open, opens desanding mouth
Sediment outflow.When depositing gravel inconvenience discharge, water source is connected by desanding rinse mouth quick coupling and helps sediment outflow of washing by water；Desanding finishes
Afterwards, enabling state；
(3) inspection operation is carried out when differential pressure warning note pressure difference is excessive: closing entrance shut-off valve, outlet shut-off valve, desanding pass
Disconnected valve takes out the cleaning blocking of conical filter element；
Two, the operation of separate measurement unit:
(1) when normal operating, entrance shut-off valve, outlet shut-off valve, desanding shut-off valve is opened, the valve of desanding rinse mouth is closed,
Desanding mouth is isolated by blind flange；Drain is carried out by the aperture that liquid level regulating controller adjusts liquid phase regulating valve, after separation
Liquid phase passes through gas phase flow rate meter respectively and liquid phase flowmeter is measured；It is turned off when showing that sand amount is deposited to close to desanding depending on pipe
When valve, operated into sediment outflow；
(2) when sediment outflow operates, it is simply turned off desanding shut-off valve, keeps the normal valve position of other valves, desanding mouth sediment outflow is opened, works as sand
When gravel deposition inconvenience discharge, water source is connected by desanding rinse mouth quick coupling and helps sediment outflow of washing by water；After desanding, restore just
Normal mode of operation；
(3) when inspection operation, entrance shut-off valve, outlet shut-off valve, desanding shut-off valve and liquid phase flowmeter front and back valve are closed,
Maintenance blowdown valve is opened, local checking maintenance work is carried out after blowdown.
9. a kind of shale gas desanding separation method according to claim 8, it is characterised in that: according to single shale gas platform
Well head number combines switching with separate measurement unit using two or more desanding filter elements and uses.
10. a kind of shale gas desanding separation method according to claim 8, it is characterised in that: when later period sand content is minimum
When, the conical filter element of installation early period can be removed.
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| CN201910418431.2A CN110130868A (en) | 2019-05-20 | 2019-05-20 | A kind of shale gas desanding separation system and method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111663931A (en) * | 2020-06-16 | 2020-09-15 | 中国地质大学（武汉） | Portable three-phase separation device for drainage port of coal-bed gas well and measurement method |
| CN111852436A (en) * | 2020-07-29 | 2020-10-30 | 北京大漠石油工程技术有限公司 | Detachable rotational flow desanding system for high-pressure gas well mouth |
| CN114165178A (en) * | 2021-11-01 | 2022-03-11 | 中石化四机石油机械有限公司 | Integrated treatment device for reverse drainage of desander |
| CN114737931A (en) * | 2022-03-23 | 2022-07-12 | 四川宏华石油设备有限公司 | Natural gas desanding system and desanding method by utilizing pressure and flow velocity regulation |
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| CN111663931A (en) * | 2020-06-16 | 2020-09-15 | 中国地质大学（武汉） | Portable three-phase separation device for drainage port of coal-bed gas well and measurement method |
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