CN110219610B - Shale gas horizontal well high-pressure pumping bridge plug device - Google Patents
Shale gas horizontal well high-pressure pumping bridge plug device Download PDFInfo
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- CN110219610B CN110219610B CN201910539246.9A CN201910539246A CN110219610B CN 110219610 B CN110219610 B CN 110219610B CN 201910539246 A CN201910539246 A CN 201910539246A CN 110219610 B CN110219610 B CN 110219610B
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- 238000005086 pumping Methods 0.000 title claims abstract description 102
- 239000012530 fluid Substances 0.000 claims abstract description 39
- 238000004806 packaging method and process Methods 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 5
- 239000004519 grease Substances 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- 239000010865 sewage Substances 0.000 claims description 5
- 230000002159 abnormal effect Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 35
- 238000006073 displacement reaction Methods 0.000 description 11
- 238000010276 construction Methods 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- 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
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/08—Introducing or running tools by fluid pressure, e.g. through-the-flow-line tool systems
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- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
- E21B33/134—Bridging plugs
-
- 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
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
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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)
- Reciprocating Pumps (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
The invention relates to a high-pressure pumping bridge plug device for a shale gas horizontal well, which comprises a shaft, a wellhead mechanism, a wellhead bridge plug packaging mechanism, a bridge plug pumping mechanism and a fracturing fluid pumping mechanism, wherein the wellhead mechanism and the wellhead bridge plug packaging mechanism are respectively connected with two ends of the shaft, and the bridge plug pumping mechanism and the fracturing fluid pumping mechanism are connected with the shaft through pipelines. Because the bridge plug pumping mechanism and the fracturing fluid pumping mechanism of the shale gas horizontal well high-pressure pumping bridge plug device are arranged separately, independent control of the bridge plug pumping mechanism and the fracturing fluid pumping mechanism can be realized, mutual interference is avoided, and the bridge plug pumping mechanism can be maintained during the operation of the shale gas horizontal well high-pressure pumping bridge plug device; and the pressure release assembly not only can ensure the normal starting of a wellhead mechanism and the like and avoid abnormal damage of the device, but also can ensure the working reliability of the wellhead mechanism and the like.
Description
Technical Field
The invention relates to the technical field of shale gas horizontal well engineering, in particular to a shale gas horizontal well high-pressure pumping bridge plug device.
Background
At present, natural gas resources are increasingly difficult to meet demands in large-scale industrial development, and shale gas is an important supplement to unconventional natural gas. The key to shale gas wells for industrial production is the adoption of horizontal wells, but because shale gas wells are mainly completed by adopting horizontal well casing perforation, the horizontal section is larger than 1000m, and therefore staged perforation fracturing is necessary. The shale gas horizontal well generally adopts a cable transmission and hydraulic pumping composite bridge plug and is matched with a perforation combined operation technology, so that staged fracturing construction of the horizontal well can be completed without using a drilling machine and a workover rig, and the shale gas horizontal well is a key technology for realizing reservoir transformation of the shale gas horizontal well. The technology not only greatly improves the operation efficiency, but also reduces the operation cost.
The existing equipment (liquid-supply sand mixing vehicle, low-pressure manifold, high-pressure manifold, well-feeding pipeline) and flow of the bridge plug for pumping the shale gas horizontal well at high pressure all adopt main pressure equipment and flow, and the following problems exist in the using process: (1) The slickwater fracturing fluid used for the shale gas horizontal well has weak sand carrying capacity, a high-low manifold structure is complex, a reducing structure is more, friction loss is large, propping agents remained in the construction process of the upper section exist in the high-low pressure flow, and the remained propping agents can cause blocked accidents of later-stage cables in the process of lifting out; (2) In the displacement process, the displacement liquid contains a large amount of propping agents, and the displacement process adopts a non-excessive displacement process, so that sand accumulation occurs in the shaft liquid, and production accidents such as blocking of a downhole tool string, pump release, bridge plug midway seat sealing and the like occur; (3) The pressure of the wellhead is large, the wellhead is always pressurized after staged fracturing, and is generally higher than 25MPa, and the wellhead flow control high-pressure element cannot be normally opened due to the absence of a wellhead pressure balance system; (4) The pumping bridge plug flow is carried out by means of a high-low pressure manifold flow of a main pressure area, and equipment correction cannot be carried out on a fracturing pump truck during pumping; (5) After the pumping is finished, in the process of taking out the cable from the well bottom, the fracturing pump truck is in a state of stopping for a long time, waiting for the fracturing pump truck to cause unnecessary non-production aging; (6) The requirement of synchronous construction of cross fracturing among multiple fracturing wells of a well factory cannot be met.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the high-pressure pumping bridge plug device for the shale gas horizontal well, which can be separated from main fracturing through an independent pumping system, thereby realizing a modularized construction scheme.
The technical scheme adopted for solving the technical problems is as follows: a shale gas horizontal well high-pressure pumping bridge plug device is constructed.
The high-pressure pumping bridge plug device for the shale gas horizontal well comprises a well shaft, a well head mechanism, a well head bridge plug packaging mechanism, a bridge plug pumping mechanism and a fracturing fluid pumping mechanism, wherein the well head mechanism and the well head bridge plug packaging mechanism are connected to the well shaft, and the bridge plug pumping mechanism and the fracturing fluid pumping mechanism are connected with the well shaft through pipelines.
In the high-pressure pumping bridge plug device for the shale gas horizontal well, the wellhead mechanism comprises an upper wellhead flange, a first wellhead gate, a second wellhead gate, a fracturing head and a third wellhead gate which are sequentially connected, and the upper wellhead flange is connected with the well shaft.
In the high-pressure pumping bridge plug device for the shale gas horizontal well, the wellhead bridge plug packaging mechanism comprises a bridge plug grease injection sealing piece, a bridge plug lubricator assembly and a wellhead blowout preventer which are sequentially connected, and the wellhead blowout preventer is connected with the third wellhead gate.
In the high-pressure pumping bridge plug device for the shale gas horizontal well, the bridge plug pumping mechanism comprises a fracturing fluid tank set, a fluid supply pump and a pumping bridge plug fracturing pump set, wherein the fracturing fluid tank set is connected with the fluid supply pump through a fluid supply pump water supply hose; the fluid supply pump is communicated with the pumping bridge plug fracturing pump set through a fracturing pump water supply hose, the pumping bridge plug fracturing pump set is connected with the fracturing head through a pumping bridge plug well inlet pipeline, and a first plug valve and a first check valve are sequentially arranged on the pumping bridge plug well inlet pipeline along the direction close to the fracturing head.
In the high-pressure pumping bridge plug device of the shale gas horizontal well, the fracturing liquid pumping mechanism comprises a fracturing main area pump set and a pressure relief assembly, the fracturing head is connected with a first connecting end of a first T-shaped tee through a main pressure area well-entering high-pressure pipeline, a second connecting end of the first T-shaped tee is connected with the pollution discharge assembly through a pressure relief flow high-pressure connecting pipeline, a third connecting end of the first T-shaped tee is connected with the fracturing main area pump set through a main pressure area discharge high-pressure pipeline, and a second check valve and a second plug valve are sequentially arranged on the main pressure area discharge high-pressure pipeline in a direction close to the fracturing main area pump set; and the pressure relief assembly comprises a third plug valve, a fourth plug valve, a depressurization manifold blowout plug valve, a blowout pipeline and a sewage disposal pond which are sequentially connected, and the third plug valve is connected with the pressure relief process high-pressure connecting pipeline.
In the high-pressure pumping bridge plug device of the shale gas horizontal well, the pressure relief assembly further comprises a pressure balance assembly, and the pressure balance assembly is connected to a pipeline between the fourth plug valve and the depressurization manifold blowout plug valve; the pressure balance assembly comprises a clean water tank and a pump truck connected with the clean water tank, a fifth plug valve is arranged at the water outlet end of the clean water tank, and the fifth plug valve is connected to a pipeline between the fourth plug valve and the pressure reducing manifold open-flow plug valve through a high-pressure discharge manifold.
In the high-pressure pumping bridge plug device of the shale gas horizontal well, the pressure relief assembly further comprises a pressure relief auxiliary assembly, the pressure auxiliary assembly comprises a sixth plug valve, a seventh plug valve and an eighth plug valve, and two ends of the eighth plug valve are respectively connected with pipelines at two ends of the third plug valve through a second T-shaped tee joint and a third T-shaped tee joint; the sixth plug valve is connected in series with the seventh plug valve, the seventh plug valve is connected to a pipeline between the second plug valve and the fracturing main zone pump set through a fourth T-shaped tee joint, and the sixth plug valve is connected to a pipeline between the second T-shaped tee joint and the fourth plug valve through a fifth T-shaped tee joint.
The high-pressure pumping bridge plug device for the shale gas horizontal well has the following beneficial effects:
1. the bridge plug pumping mechanism and the fracturing fluid pumping mechanism of the high-pressure pumping bridge plug device of the shale gas horizontal well are arranged separately, so that independent control of the bridge plug pumping mechanism and the fracturing fluid pumping mechanism can be realized, mutual interference is avoided, and the bridge plug pumping mechanism can be maintained during the working period of the high-pressure pumping bridge plug device of the shale gas horizontal well.
2. The shale gas horizontal well high-pressure pumping bridge plug device comprises a pressure relief assembly, so that normal starting of a wellhead mechanism, a wellhead bridge plug packaging mechanism, a bridge plug pumping mechanism, a fracturing fluid pumping mechanism and the like can be ensured, abnormal damage of the device is avoided, and working reliability of the wellhead mechanism, the wellhead bridge plug packaging mechanism, the bridge plug pumping mechanism, the fracturing fluid pumping mechanism and the like can be ensured.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic diagram of a shale gas horizontal well high pressure pumping bridge plug apparatus according to the present invention;
wherein, the reference numerals in fig. 1 are:
1. a wellbore; 2. a wellhead upper flange; 3. a first wellhead gate; 4. a second wellhead gate; 5. a fracturing head; 6. a third wellhead gate; 7. a bridge plug grease injection seal; 8. bridge plug lubricator assembly; 9. a wellhead blowout preventer; 10. a fracturing fluid tank set; 11. a liquid supply pump; 12. pumping bridge plug fracturing pump set; 13. a water supply hose of the liquid supply pump; 14. a fracturing pump water supply hose; 15. pumping bridge plugs into well pipelines; 16. a first plug valve; 17. a first check valve; 18. a first T-tee; 19. a sewage disposal pond; 20. a second check valve; 21. a second plug valve; 22. a third plug valve; 23. a fourth plug valve; 24. a depressurization manifold is used for discharging a plug valve; 25. a blow-out line; 26. a clean water tank; 27. a pump truck; 28. a fifth plug valve; 29. a fifth T-tee; 30. a sixth plug valve; 31. a seventh plug valve; 32. an eighth plug valve; 33. fracturing a main zone pump set; 34. a main pressure area is put into a well high-pressure pipeline; 35. a high-pressure connecting pipeline for the pressure relief process; 36. the main pressure area is discharged from the high-pressure pipeline; 37. a high pressure exhaust manifold; 38. a sixth T-tee; 39. a second T-tee; 40. a third T-tee; 41. and a fourth T-shaped tee.
Detailed Description
For a clearer understanding of technical features, objects and effects of the present invention, a detailed description of embodiments of the present invention will be made with reference to the accompanying drawings.
The high-pressure pumping bridge plug device for the shale gas horizontal well comprises a well shaft 1, a wellhead mechanism, a wellhead bridge plug packaging mechanism, a bridge plug pumping mechanism and a fracturing fluid pumping mechanism, wherein the wellhead mechanism and the wellhead bridge plug packaging mechanism are connected to the well shaft 1, and the bridge plug pumping mechanism and the fracturing fluid pumping mechanism are connected with the well shaft 1 through pipelines. Because the bridge plug pumping mechanism and the fracturing fluid pumping mechanism of the shale gas horizontal well high-pressure pumping bridge plug device are arranged separately, independent control of the bridge plug pumping mechanism and the fracturing fluid pumping mechanism can be realized, mutual interference is avoided, and the bridge plug pumping mechanism can be maintained during the operation of the shale gas horizontal well high-pressure pumping bridge plug device.
In the high-pressure pumping bridge plug device for the shale gas horizontal well, the wellhead mechanism comprises an upper wellhead flange 2, a first wellhead gate 3, a second wellhead gate 4, a fracturing head 5 and a third wellhead gate 6 which are sequentially connected, the upper wellhead flange 2 is connected with the well shaft 1, and the second wellhead gate 4 and the third wellhead gate 6 are opened when the high-pressure pumping bridge plug device is in operation.
In the high-pressure pumping bridge plug device for the shale gas horizontal well, the wellhead bridge plug packaging mechanism comprises a bridge plug grease injection sealing piece 7, a bridge plug lubricator assembly 8 and a wellhead blowout preventer 9 which are sequentially connected, and the wellhead blowout preventer 9 is connected with the third wellhead gate 6, so that the displacement, the pressure, the speed and the like of pumping construction are determined through sand adding conditions, displacement tests and the like, the pumping quantity meets the requirements, and impurities are not present.
In the high-pressure pumping bridge plug device for the shale gas horizontal well, the bridge plug pumping mechanism comprises a fracturing fluid tank set 10, a fluid supply pump 11 and a pumping bridge plug fracturing pump set 12, wherein the fracturing fluid tank set 10 is connected with the fluid supply pump 11 through a fluid supply pump water supply hose 13; the fluid supply pump 11 is communicated with the pumping bridge plug fracturing pump set 12 through a fracturing pump water supply hose 14, the pumping bridge plug fracturing pump set 12 is connected with the fracturing head 5 through a pumping bridge plug well feeding pipeline 15, and a first plug valve 16 and a first check valve 17 are sequentially arranged on the pumping bridge plug well feeding pipeline 15 along the direction approaching the fracturing head 5.
When the tool is in operation, the first plug valve 16 is opened, a cable bridge plug enters the shaft 1, and the cable is lowered in the vertical well section by the bridge plug and the self weight of the perforating gun until the tool cannot be freely lowered in the vertical well section, and the cable is lifted up to correct the depth; and then start the processThe working fluid in the fracturing fluid tank set 10 enters the pumping bridge plug fracturing pump set 12 after passing through the water supply pump water supply hose 13, then the working fluid entering the pumping bridge plug fracturing pump set 12 sequentially flows through the pumping bridge plug well inlet pipeline 15, the first plug valve 16 and the first check valve 17 after being pressurized, and flows into the well bore 1 through the fracturing head 5. Also, in this process, the pumping amount of the working fluid was 0.3m 3 /min～2m 3 About/min and pump is started to 0.4m at 30 DEG well deviation 3 The displacement per min, when the cable tension increases, the cable speed is slowly increased to 1000 m/h-2000 m/h; increasing displacement to 0.8m at 45 ° well deviation 3 Per min, and then increasing the displacement to 1.2m at 60 ° well inclination 3 Per min, increasing the displacement to 1.6m at 75 ° well deviation 3 The cable speed is 1000 m/h-2000 m/h per minute, 1.6m is used in the horizontal section 3 /min～1.8m 3 The displacement pumping cable composite bridge plug per min to the destination location. The operator of the pump truck is informed 100m in advance of reaching the predetermined depth, 10m in advance of the pump truck is informed to prepare for stopping the pump, and 5m in advance of stopping the pump and closing the first plug valve 16. After the bridge plug, the perforating and the lifting cable instrument string are completely entered into the bridge plug lubricator assembly 8, the third wellhead gate 6 is closed, the internal pressure of the bridge plug lubricator assembly 8 is removed, the bridge plug lubricator assembly 8 connected with the wellhead blowout preventer 9 is opened, the bridge plug grease injection sealing element 7 is removed, the perforating gun is detached, the perforating emissivity is checked, and the next operation is prepared.
In the high-pressure pumping bridge plug device of the shale gas horizontal well, the fracturing fluid pumping mechanism comprises a fracturing main area pump group 33 and a pressure relief assembly, the fracturing head 5 is connected with a first connecting end of a first T-shaped tee 18 through a main pressure area well-entering high-pressure pipeline 34, a second connecting end of the first T-shaped tee 18 is connected with the pollution discharge assembly through a pressure relief flow high-pressure connecting pipeline 35, a third connecting end of the first T-shaped tee 18 is connected with the fracturing main area pump group 33 through a main pressure area discharging high-pressure pipeline 36, and a second check valve 20 and a second plug valve 21 are sequentially arranged on the main pressure area discharging high-pressure pipeline 36 along the direction close to the fracturing main area pump group 33; and the pressure release assembly comprises a third plug valve 22, a fourth plug valve 23, a pressure reducing manifold open-flow plug valve 24, an open-flow pipeline 25 and a sewage disposal pond 19 which are sequentially connected, and the third plug valve 22 is connected with the pressure release process high-pressure connecting pipeline 35.
In the high-pressure pumping bridge plug device of the shale gas horizontal well, the pressure relief assembly further comprises a pressure balance assembly, and the pressure balance assembly is connected to a pipeline between the fourth plug valve 23 and the depressurization manifold blowout plug valve 24; the pressure balance assembly comprises a clean water tank 26 and a pump truck 27 connected with the clean water tank 26, a fifth plug valve 28 is arranged at the water outlet end of the clean water tank 26, and the fifth plug valve 28 is connected to a pipeline between the fourth plug valve 23 and the depressurization manifold blowout plug valve 24 through a high-pressure discharge manifold 37.
When the high-pressure discharge manifold 37 is specifically connected, the high-pressure discharge manifold 37 is connected to a pipeline between the fourth plug valve 23 and the pressure reducing manifold discharge plug valve 24 through a sixth T-shaped tee 38, when the high-pressure discharge manifold 37 is connected, a first connecting end of the sixth T-shaped tee 38 is connected with the high-pressure discharge manifold 37, a second connecting end of the sixth T-shaped tee 38 is connected with the fourth plug valve 23, and a third connecting end of the sixth T-shaped tee 38 is connected with the pressure reducing manifold discharge plug valve 24.
In the high-pressure pumping bridge plug device for the shale gas horizontal well, the pressure relief assembly further comprises a pressure relief auxiliary assembly, the pressure auxiliary assembly comprises a sixth plug valve 30, a seventh plug valve 31 and an eighth plug valve 32, and two ends of the eighth plug valve 32 are respectively connected to pipelines at two ends of the third plug valve 22 through a second T-shaped tee 39 and a third T-shaped tee 40; the sixth plug valve 30 and the seventh plug valve 31 are connected in series, and the seventh plug valve 31 is connected to a pipeline between the second plug valve 21 and the fracturing main pump set 33 through a fourth T-shaped tee 41, and the sixth plug valve 30 is connected to a pipeline between the second T-shaped tee 39 and the fourth plug valve 23 through a fifth T-shaped tee 29.
During operation, the sixth plug valve 30 and the seventh plug valve 31 are opened, so that the fracturing fluid flowing out of the fracturing main area pump set 33 flows into the sewage disposal tank 19 after sequentially passing through the fourth T-shaped tee 41, the seventh plug valve 31, the sixth plug valve 30, the fifth T-shaped tee 29, the fourth plug valve 23, the depressurization manifold blowout plug valve 24 and the blowout pipeline 25, thereby achieving the purpose of pressure relief, and enabling the pressure in the pipeline to be 0, so that equipment maintenance is facilitated. Moreover, when the third plug valve 22 and the sixth plug valve 30 cannot be normally opened due to excessive pressure in the pipe, the fifth plug valve 28 and the fourth plug valve 23 are opened, the depressurization manifold blowout plug valve 24 is closed, and the pump truck 27 is started, so that the clean water in the clean water tank 26 can flow through the fifth plug valve 28, the fourth plug valve 23 and the fifth tee 29 in sequence after being pressurized, so as to reduce the pressure difference at two ends of the sixth plug valve 30 or the third plug valve 22, ensure the normal opening of the sixth plug valve 30 or the third plug valve 22, avoid the damage of the device, and ensure the working reliability of the high-pressure pumping bridge plug device of the shale gas horizontal well.
The embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the claims, which are to be protected by the present invention.
Claims (3)
1. The utility model provides a shale gas horizontal well high pressure pump send bridging plug device which characterized in that: the well head mechanism and the well head bridge plug packaging mechanism are connected to the well shaft, and the bridge plug pumping mechanism and the fracturing fluid pumping mechanism are connected with the well shaft through pipelines;
the wellhead mechanism comprises an upper wellhead flange, a first wellhead gate, a second wellhead gate, a fracturing head and a third wellhead gate which are sequentially connected, and the upper wellhead flange is connected with the shaft;
the wellhead bridge plug packaging mechanism comprises a bridge plug grease injection sealing piece, a bridge plug lubricator assembly and a wellhead blowout preventer which are sequentially connected, and the wellhead blowout preventer is connected with the third wellhead gate;
the bridge plug pumping mechanism comprises a fracturing fluid tank set, a liquid supply pump and a pumping bridge plug fracturing pump set, wherein the fracturing fluid tank set is connected with the liquid supply pump through a liquid supply pump water supply hose; the fluid supply pump is communicated with the pumping bridge plug fracturing pump set through a fracturing pump water supply hose, the pumping bridge plug fracturing pump set is connected with the fracturing head through a pumping bridge plug well pipe, and a first plug valve and a first check valve are sequentially arranged on the pumping bridge plug well pipe along the direction close to the fracturing head;
the fracturing fluid pumping mechanism comprises a fracturing main area pump set and a pressure relief assembly, the fracturing head is connected with a first connecting end of a first T-shaped tee through a main pressure area well-entering high-pressure pipeline, a second connecting end of the first T-shaped tee is connected with the pressure relief assembly through a pressure relief flow high-pressure connecting pipeline, a third connecting end of the first T-shaped tee is connected with the fracturing main area pump set through a main pressure area discharging high-pressure pipeline, and a second check valve and a second plug valve are sequentially arranged on the main pressure area discharging high-pressure pipeline in a direction close to the fracturing main area pump set; and the pressure relief assembly comprises a third plug valve, a fourth plug valve, a depressurization manifold blowout plug valve, a blowout pipeline and a sewage disposal pond which are sequentially connected, and the third plug valve is connected with the pressure relief process high-pressure connecting pipeline.
2. The shale gas horizontal well high pressure pumping bridge plug device of claim 1, wherein: the pressure release assembly further comprises a pressure balance assembly, and the pressure balance assembly is connected to a pipeline between the fourth plug valve and the depressurization manifold blowout plug valve; the pressure balance assembly comprises a clean water tank and a pump truck connected with the clean water tank, a fifth plug valve is arranged at the water outlet end of the clean water tank, and the fifth plug valve is connected to a pipeline between the fourth plug valve and the pressure reducing manifold open-flow plug valve through a high-pressure discharge manifold.
3. The shale gas horizontal well high pressure pumping bridge plug device of claim 1, wherein: the pressure relief assembly further comprises a pressure relief auxiliary assembly, the pressure relief auxiliary assembly comprises a sixth plug valve, a seventh plug valve and an eighth plug valve, and two ends of the eighth plug valve are respectively connected with pipelines at two ends of the third plug valve through a second T-shaped tee joint and a third T-shaped tee joint; the sixth plug valve is connected in series with the seventh plug valve, the seventh plug valve is connected to a pipeline between the second plug valve and the fracturing main zone pump set through a fourth T-shaped tee joint, and the sixth plug valve is connected to a pipeline between the second T-shaped tee joint and the fourth plug valve through a fifth T-shaped tee joint.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910539246.9A CN110219610B (en) | 2019-06-20 | 2019-06-20 | Shale gas horizontal well high-pressure pumping bridge plug device |
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| CN201910539246.9A CN110219610B (en) | 2019-06-20 | 2019-06-20 | Shale gas horizontal well high-pressure pumping bridge plug device |
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| CN110219610A CN110219610A (en) | 2019-09-10 |
| CN110219610B true CN110219610B (en) | 2024-02-13 |
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| CN111535789A (en) * | 2020-04-14 | 2020-08-14 | 中国石油天然气集团有限公司 | Method for calculating bridge-injection combined pumping speed control curve of oil-gas well horizontal segment pump |
| CN115012863B (en) * | 2022-06-02 | 2024-05-17 | 中国石油化工股份有限公司 | Method for replacing wellhead of high-pressure gas well without killing well |
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