CN104533381A - Gas-liquid separation device for drilling polishing bridge plug flowback process of natural gas well - Google Patents
Gas-liquid separation device for drilling polishing bridge plug flowback process of natural gas well Download PDFInfo
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- CN104533381A CN104533381A CN201410848548.1A CN201410848548A CN104533381A CN 104533381 A CN104533381 A CN 104533381A CN 201410848548 A CN201410848548 A CN 201410848548A CN 104533381 A CN104533381 A CN 104533381A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B43/40—Separation associated with re-injection of separated materials
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- Mining & Mineral Resources (AREA)
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- Environmental & Geological Engineering (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention provides a gas-liquid separation device for the drilling polishing bridge plug flowback process of a natural gas well. The gas-liquid separation device comprises a cylinder and a screen pipe, wherein the two ends of the cylinder are closed, and the screen pipe is arranged in the cylinder in the axial direction of the cylinder. The two ends of the screen pipe extend out of the cylinder. One end of the screen pipe is connected with a coupling. The coupling is used for being connected with a liquid discharge pipe. The other end of the screen pipe is provided with a ball valve. The cylindrical wall of the cylinder is provided with a plurality of liquid discharge holes. The pipe wall of the screen pipe is provided with a plurality of small holes. The central lines of the small holes in the radial direction of the pipe wall are parallel to the central lines of the liquid discharge holes in the radial direction of the cylindrical wall. Flowback gas and flowback liquid are separated under the action of gravity, the action of choke flow of the ball valve and the filtering action of the small holes of the screen pipe when returning, the liquid is scattered in the cylinder in a rain flower form and flows into a recovery tank through the liquid discharge holes in the cylinder, and the gas drifts away accordingly; the problems that the flowback gas and the flowback liquid are hard to separate and combustible gas can not be detected easily are solved, and the gas-liquid separation device guarantees the field operation safety and conforms to the environmental protection regulations.
Description
Technical field
The invention belongs to gas field underground work site plant technical field, is one of auxiliary equipment in gas well fracturing, gas testing operation process, is specifically related to a kind of boring for the natural gas well and grinds the gas-liquid separation device that bridging plug returns drainage journey.
Background technology
In the transformation of evaluation well compact reservoir, usually adopt slim-hole 3-1/2 " sleeve pipe drilling type composite bridge plug separate stratum fracfturing technology, the effect of bridging plug is Oil/gas Well sealing, there is working procedure few, cycle is short, card envelope position feature accurately, be divided into permanent type bridging plug and detachable bridge plug two kinds: (1) permanent type bridging plug is formed at the initial stage eighties, because its working procedure is few, cycle is short, card envelope position is accurate, so be just widely applied in Oil/gas Well sealing once appearance, substantially the technology of cementing plug sealing before instead of, become Pressure Curve in Oil Testing Well shutoff and try layer, the main sealing technique of formation testing is returned on carrying out.The special layers positions such as the dried layer, water layer, gas-bearing formation and the abnormal pressure that occur in middle-shallow layer formation testing construction, for convenience of follow-up formation testing, plugged and abandoned layer position, usually adopts such bridging plug to carry out sealing, terminates well simultaneously also adopt permanent type bridging plug to shunt in a well for part short-term without the formation testing of development plan.In addition, this bridging plug also for the layer of the examination shutoff of deep gas well, for the successful implementation above returning the technologies such as test, fracturing reform provides safeguard.(2) detachable bridge plug produces along with the appearance of permanent type bridging plug, be formed at the eighties, as a kind of oil field down-hole plugging instrument, be widely used in oil field prospecting and exploitation shutoff lower well section when oil-water well separate stratum fracfturing, separate layer acid treatment, formation testing by layer construction.It solve preferably set, salvage, unsealing operation is complicated, uses the problem that success rate is low.Functionally part can substitute+packer of giving up, permanent type bridging plug and note grey shutoff, is a kind of safe and reliable, with low cost, multiple functional down-hole plugging instrument.In middle-shallow layer formation testing construction, for packing abnormal pressure, high yield, span, the special layers position such as large or inclined shaft, realization is returned formation testing, the success rate of two sealed packer construction is lower, for convenience of follow-up formation testing, improve formation testing one-time success rate, usually adopt such bridging plug to carry out sealing.
Before gas well is gone into operation, need to bore rapidly to grind off bridging plug, and at brill mill bridging plug, in gas lift liquid drainage process, according to environmental requirement, allly return discharge opeing and do not allow to land, must collect and enter recycling can, returning drainage journey end, if there is natural gas to return out, gas detecting instrument not easily detects natural gas, can not return out by Timeliness coverage natural gas, natural gas together can enter recycling can with liquid, there is larger potential safety hazard, therefore, it is difficult that brill mill bridging plug in the urgent need to address returns the gas-liquid separation of drainage journey end, the problem not easily detected, research makes a kind of being applicable to and bores the gas-liquid separation device that mill composite bridge plug returns row's recovery process.
Summary of the invention
The object of this invention is to provide a kind of boring for the natural gas well and grind the gas-liquid separation device that bridging plug returns drainage journey, solve brill mill bridging plug and return the problem that the gas-liquid separation of drainage journey end is difficult, not easily detect.
For this reason, the invention provides a kind of boring for the natural gas well and grind the gas-liquid separation device that bridging plug returns drainage journey, comprise in the cylinder of closed at both ends and cylinder along Cylindorical rod to the screen casing arranged, the outside of cylinder is extended at the two ends of screen casing respectively, one end of screen casing is connected with box cupling, this box cupling is used for being connected with tapping line, the other end mounting ball valve of screen casing;
The barrel of described cylinder is provided with multiple outage;
The tube wall of described screen casing is provided with multiple aperture, and aperture is along the center line of tube wall radial direction and outage along the centerline parallel of barrel radial direction.
Described outage equidistantly arranges along the barrel of cylinder, and aperture equidistantly arranges along the tube wall of screen casing.
Described outage has three.
The diameter of described aperture is 4mm ~ 8mm.
The diameter of described aperture is 6.18mm.
Also comprise the bracing or strutting arrangement be fixedly connected with the barrel of cylinder, described bracing or strutting arrangement comprises the V-type support bottom the barrel two ends being fixedly connected on cylinder respectively, and the horizontal stand be fixedly connected with the bottom of V-type support.
Described horizontal stand forms with the horizontal steel plate of the centerline axis parallel of cylinder, the vertical steel plate that is fixedly connected on the two ends of horizontal steel plate vertical with horizontal steel plate by two;
Described horizontal steel plate and vertical steel plate are in same plane, and the upper surface of vertical steel plate is fixedly connected with V-type support.
Beneficial effect of the present invention: this is used for the natural gas well and bores the gas-liquid separation device that mill bridging plug returns drainage journey and be placed on recycling can, return exhaust liquid when returning exhaust liquid and returning out to be separated under Action of Gravity Field, ball valve choked flow and the aperture filtration of screen casing, liquid distributes in cylinder with the form of rain flower, and flow into recycling can by the outage on cylinder, in the process of distributing, gas also flies away out thereupon, solves and returns discharge opeing gas-liquid separation difficulty, not easily detect the problem of fuel gas.Return out if any natural gas, just be easy to detect fuel gas at the other gas detecting instrument that uses of gas-liquid separation device returning drainage journey for natural gas well brill mill bridging plug, flow process can be switched immediately after finding fuel gas, control downstream pressure, make to return discharging liquid and enter two phase separator, carry out gas-liquid separation, gas enters combustion cell burning, liquid enters recycling can and collects, and guarantees field work safe.
Below with reference to accompanying drawing, the present invention is described in further details.
Accompanying drawing explanation
Fig. 1 bores for the natural gas well elevation that mill bridging plug returns the gas-liquid separation device of drainage journey.
Fig. 2 bores for the natural gas well upward view that mill bridging plug returns the gas-liquid separation device of drainage journey.
Fig. 3 bores for the natural gas well lateral view that mill bridging plug returns the gas-liquid separation device of drainage journey.
Fig. 4 is the schematic diagram of bracing or strutting arrangement.
Fig. 5 bores for the natural gas well scheme of installation that mill bridging plug returns the gas-liquid separation device of drainage journey.
Description of reference numerals: 1, cylinder; 2, screen casing; 3, box cupling; 4, ball valve; 5, outage; 6, aperture; 7, bracing or strutting arrangement; 8, V-type support; 9, horizontal stand; 901, horizontal steel plate; 902, vertical steel plate; 10, well head; 11, surface safety valve (SSV); 12, desander; 13, choke manifold; 14, two phase separator; 15, three phase separator; 16, recycling can; 17, combustion cell; 18, the first valve; 19, the second valve; 20, the 3rd valve; 21, the 4th valve; 22, the 5th valve; 23, the 6th valve; 24, the 7th valve; 25, the 8th valve; 26, the 9th valve; 27, the tenth valve.
Detailed description of the invention
Further the gas-liquid separation device that this returns drainage journey for natural gas well brill mill bridging plug is described in detail below with reference to accompanying drawing.
embodiment 1:
The invention provides a kind of boring for the natural gas well and grind the gas-liquid separation device that bridging plug returns drainage journey, as shown in Figure 1, Figure 2 and Figure 3, comprise the screen casing 2 axially arranged along cylinder 1 in the cylinder 1 of closed at both ends and cylinder 1, the outside of cylinder 1 is extended at the two ends of screen casing 2 respectively, one end of screen casing 2 is connected with box cupling 3, this box cupling 3 for being connected with tapping line, the other end mounting ball valve 4 of screen casing 2; The barrel of described cylinder 1 is provided with multiple outage 5; The tube wall of described screen casing 2 is provided with multiple aperture 6, and aperture 6 is along the center line of tube wall radial direction and outage 5 along the centerline parallel of barrel radial direction.
First gas detecting instrument is used, preferred U.S. English Cisco M40 four-in-one gas detecting instrument, whether the gas-liquid separation device side that detection returns drainage journey for natural gas well brill mill bridging plug has fuel gas, as without fuel gas, then select to bore mill bridging plug and return drainage journey, i.e. well head 10 → surface safety valve (SSV) 11 → desander 12 → choke manifold 13 → gas-liquid separation device → recycling can 16, concrete, as shown in Figure 5, open the first valve 18 and the second valve 19, other valve closings, mixture in oil pipe exports from well head 10, desander 12 is arrived by surface safety valve (SSV) 11, arranging desander 12 protects plant equipment to exempt from wearing and tearing, reduce weight at pipeline, deposition in groove, and reduce because foreign particle is accumulated in clearing times required in digester in a large number, natural gas arranges desander 12 in producing can prevent formation sand production blocking pipeline or appliance arrangement, desander 12 is by after the Impurity removal of Large stone that contains in mixture, mixture is by choke manifold 13, directly enter and bore for the natural gas well gas-liquid separation device that mill bridging plug returns drainage journey, this is used for the natural gas well and bores the gas-liquid separation device that mill bridging plug returns drainage journey and be placed on recycling can 16, when returning exhaust liquid and returning out, return exhaust liquid and enter screen casing 2, return exhaust liquid at Action of Gravity Field simultaneously, ball valve 4 choked flow is separated with under the lattice gear effect of the aperture 6 on screen casing 2 tube wall, liquid distributes in cylinder 1 with the form of rain flower, and flow into recycling can 16 from the outage 5 cylinder 1, in the process of distributing, gas also flies away out thereupon, achieve gas-liquid separation, and reduce the difficulty detecting natural gas, also ensure that the safety of operation simultaneously, and meet environmental regulations.
As gas detecting instrument detects that boring mill bridging plug for the natural gas well returns that the gas-liquid separation device of drainage journey is other fuel gas, namely returning in exhaust liquid has natural gas to return out, then select discharge opeing flow process, namely well head 10 → surface safety valve (SSV) 11 → desander 12 → choke manifold 13 → two phase separator 14 → natural gas to combustion cell 17 burn/liquid collection is to recycling can 16, concrete, as shown in Figure 5, open the 7th valve 24, 8th valve 25, 9th valve 26 and the tenth valve 27, other valve closings, mixture in oil pipe exports from well head 10, desander 12 is arrived by surface safety valve (SSV) 11, arranging desander 12 protects plant equipment to exempt from wearing and tearing, reduce weight at pipeline, deposition in groove, and reduce because foreign particle is accumulated in clearing times required in digester in a large number, natural gas arranges desander 12 in producing can prevent formation sand production blocking pipeline or appliance arrangement, desander 12 is by after the Impurity removal of Large stone that contains in mixture, mixture is by choke manifold 13, enter two phase separator 14, by two phase separator 14, liquids and gases are separated, isolated natural gas enters combustion cell 17 and burns, liquid enters recycling can 16 and collects, guarantee discharge opeing safety.
In the production test stage in discharge opeing flow process latter stage, select testing process, namely well head 10 → surface safety valve (SSV) 11 → desander 12 → choke manifold 13 → three phase separator 15 → natural gas to combustion cell 17 burn/liquid collection is to recycling can 16, concrete, as shown in Figure 5, open the second valve 19, 3rd valve 20, 4th valve 21, 5th valve 22 and the 6th valve 23, other valve closings, mixture in oil pipe exports from well head 10, desander 12 is arrived by surface safety valve (SSV) 11, arranging desander 12 protects plant equipment to exempt from wearing and tearing, reduce weight at pipeline, deposition in groove, and reduce because foreign particle is accumulated in clearing times required in digester in a large number, natural gas arranges desander 12 in producing can prevent formation sand production blocking pipeline or appliance arrangement, desander 12 is by after the Impurity removal of Large stone that contains in mixture, mixture is by choke manifold 13, enter three phase separator 15, by three phase separator 15, liquids and gases are separated, isolated natural gas enters combustion cell 17 and burns, liquid enters recycling can 16 and collects, guarantee discharge opeing safety.
It should be noted that, when bridging plug chip blocking screen casing, cleaning de-plugging can be carried out to it, residue in collecting pipe at ball valve 4 connecting line of screen casing end.
embodiment 2:
On the basis of embodiment 1, further, in order to make to return exhaust liquid discharged by aperture 6 and outage 5 time, can uniform force, described outage 5 equidistantly arranges along the barrel of cylinder 1, and aperture 6 equidistantly arranges along the tube wall of screen casing 2, and the spacing of aperture 6 is 100mm.
embodiment 3:
On the basis of embodiment 2, it should be noted that, described outage 5 has three, and preferably outage 5 is elliptical shape, concrete, and oval major axis is 250mm, and minor axis is 220mm.
embodiment 4:
On the basis of embodiment 2, further, the diameter of described aperture 6 is 4mm ~ 8mm.
embodiment 5:
On the basis of embodiment 4, concrete, the diameter of described aperture 6 is 6.18mm.
embodiment 6:
On the basis of embodiment 1, as shown in Figure 3 and Figure 4, also comprise the bracing or strutting arrangement 7 be fixedly connected with the barrel of cylinder 1, described bracing or strutting arrangement 7 comprises the V-type support 8 bottom the barrel two ends being fixedly connected on cylinder 1 respectively, and the horizontal stand 9 be fixedly connected with the bottom of V-type support 8.It is pointed out that bracing or strutting arrangement 7 grinds bridging plug and returns the gas-liquid separation device of drainage journey by being welded to connect with boring for the natural gas well, during use, supportive device is placed on recycling can 16, make to return and be vented liquid from the process that outage 5 is discharged, distribute more thorough.
embodiment 7:
On the basis of embodiment 6, concrete, described horizontal stand 9 forms with the horizontal steel plate 901 of the centerline axis parallel of cylinder 1, the vertical steel plate 902 that is fixedly connected on the two ends of horizontal steel plate 901 vertical with horizontal steel plate 901 by two; Described horizontal steel plate 901 is in same plane with vertical steel plate 902, and the upper surface of vertical steel plate 902 is fixedly connected with V-type support 8.
Provided by the inventionly bore for the natural gas well gas-liquid separation device that mill bridging plug returns drainage journey and be placed on recycling can, return exhaust liquid when returning exhaust liquid and returning out to be separated under Action of Gravity Field, ball valve choked flow and the aperture filtration of screen casing, liquid distributes in cylinder with the form of rain flower, and flow into recycling can by the outage on cylinder, in the process of distributing, gas also flies away out thereupon, solves and returns discharge opeing gas-liquid separation difficulty, not easily detect the problem of fuel gas.Return out if any natural gas, just be easy to detect fuel gas at the other gas detecting instrument that uses of gas-liquid separation device returning drainage journey for natural gas well brill mill bridging plug, flow process can be switched immediately after finding fuel gas, control downstream pressure, make to return discharging liquid and enter two phase separator, carry out gas-liquid separation, gas enters combustion cell burning, liquid enters recycling can and collects, and guarantees field work safe, and meets environmental regulations.
More than exemplifying is only illustrate of the present invention, does not form the restriction to protection scope of the present invention, everyly all belongs within protection scope of the present invention with the same or analogous design of the present invention.The parts that the present embodiment does not describe in detail and structure belong to the well-known components of the industry and common structure or conventional means, do not describe one by one here.
Claims (7)
1. one kind is bored for the natural gas well gas-liquid separation device that mill bridging plug returns drainage journey, it is characterized in that: comprise the screen casing (2) axially arranged along cylinder (1) in the cylinder (1) of closed at both ends and cylinder (1), the outside of cylinder (1) is extended at the two ends of screen casing (2) respectively, one end of screen casing (2) is connected with box cupling (3), this box cupling (3) for being connected with tapping line, screen casing (2) other end mounting ball valve (4);
The barrel of described cylinder (1) is provided with multiple outage (5);
The tube wall of described screen casing (2) is provided with multiple aperture (6), and aperture (6) is along the center line of tube wall radial direction and outage (5) along the centerline parallel of barrel radial direction.
2. a kind of boring for the natural gas well grinds the gas-liquid separation device that bridging plug returns drainage journey as claimed in claim 1, it is characterized in that: described outage (5) equidistantly arranges along the barrel of cylinder (1), and aperture (6) equidistantly arranges along the tube wall of screen casing (2).
3. a kind of boring for the natural gas well grinds the gas-liquid separation device that bridging plug returns drainage journey as claimed in claim 2, it is characterized in that: described outage (5) has three.
4. a kind of boring for the natural gas well grinds the gas-liquid separation device that bridging plug returns drainage journey as claimed in claim 2, it is characterized in that: the diameter of described aperture (6) is 4mm ~ 8mm.
5. a kind of boring for the natural gas well grinds the gas-liquid separation device that bridging plug returns drainage journey as claimed in claim 4, it is characterized in that: the diameter of described aperture (6) is 6.18mm.
6. a kind of boring for the natural gas well grinds the gas-liquid separation device that bridging plug returns drainage journey as claimed in claim 1, it is characterized in that: also comprise the bracing or strutting arrangement (7) be fixedly connected with the barrel of cylinder (1), described bracing or strutting arrangement (7) comprises the V-type support (8) bottom the barrel two ends being fixedly connected on cylinder (1) respectively, and the horizontal stand (9) be fixedly connected with the bottom of V-type support (8).
7. a kind ofly as claimed in claim 2 bore mill bridging plug for the natural gas well and return the gas-liquid separating device of drainage journey, it is characterized in that: described horizontal stand (9) forms with the horizontal steel plate (901) of the centerline axis parallel of cylinder (1), the vertical steel plate (902) that is fixedly connected on the two ends of horizontal steel plate (901) vertical with horizontal steel plate (901) by two;
Described horizontal steel plate (901) and vertical steel plate (902) are in same plane, and the upper surface of vertical steel plate (902) is fixedly connected with V-type support (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410848548.1A CN104533381B (en) | 2014-12-31 | 2014-12-31 | Gas-liquid separation device for drilling polishing bridge plug flowback process of natural gas well |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410848548.1A CN104533381B (en) | 2014-12-31 | 2014-12-31 | Gas-liquid separation device for drilling polishing bridge plug flowback process of natural gas well |
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| CN104533381A true CN104533381A (en) | 2015-04-22 |
| CN104533381B CN104533381B (en) | 2017-05-10 |
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| GB2055634A (en) * | 1979-08-16 | 1981-03-11 | Ishikawajima Harima Heavy Ind | Gas-liquid separators |
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| CN201361490Y (en) * | 2008-11-07 | 2009-12-16 | 西安长庆科技工程有限责任公司 | Combined filtration and separation device |
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| CN203061007U (en) * | 2012-12-06 | 2013-07-17 | 无锡压缩机股份有限公司 | Diesel oil separator |
| CN203090696U (en) * | 2013-01-17 | 2013-07-31 | 山东华鲁恒升化工股份有限公司 | Mechanical gravity type oil-water separator |
| CN203484002U (en) * | 2013-09-24 | 2014-03-19 | 中联煤层气有限责任公司 | Coalescent filter and filter element |
| CN203549818U (en) * | 2013-11-16 | 2014-04-16 | 中国石油化工股份有限公司 | Combustion cylinder with gas-liquid separation function |
| CN204419156U (en) * | 2014-12-31 | 2015-06-24 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of boring for the natural gas well grinds the gas-liquid separation device that bridging plug returns drainage journey |
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2014
- 2014-12-31 CN CN201410848548.1A patent/CN104533381B/en active Active
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| GB2055634A (en) * | 1979-08-16 | 1981-03-11 | Ishikawajima Harima Heavy Ind | Gas-liquid separators |
| US6322616B1 (en) * | 2000-02-24 | 2001-11-27 | Sdh, Inc. | Gas separator for an oil well production line |
| RU2307245C1 (en) * | 2005-12-05 | 2007-09-27 | Открытое акционерное общество "Акционерная нефтяная компания "Башнефть" | Stabilizing reservoir for separation plant |
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| CN203090696U (en) * | 2013-01-17 | 2013-07-31 | 山东华鲁恒升化工股份有限公司 | Mechanical gravity type oil-water separator |
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| CN104533381B (en) | 2017-05-10 |
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Effective date of registration: 20211029 Address after: 100007 Oil Mansion, 9 North Avenue, Dongcheng District, Beijing, Dongzhimen Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CHINA NATIONAL PETROLEUM CORPORATION CHUANQING DRILLING ENGINEERING Co. Address before: 710018 room 1207, Changqing building, Changqing Xing Long Yuan District, Xi'an, Shaanxi Patentee before: CHINA NATIONAL PETROLEUM CORPORATION CHUANQING DRILLING ENGINEERING COMPANY LIMITED CHANGQING DOWNHOLE TECHNOLOGY Co. Patentee before: CHINA NATIONAL PETROLEUM CORPORATION CHUANQING DRILLING ENGINEERING Co. |
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