CN112302587A - Internal debugging fixed-pressure matching tool - Google Patents
Internal debugging fixed-pressure matching tool Download PDFInfo
- Publication number
- CN112302587A CN112302587A CN202011326203.1A CN202011326203A CN112302587A CN 112302587 A CN112302587 A CN 112302587A CN 202011326203 A CN202011326203 A CN 202011326203A CN 112302587 A CN112302587 A CN 112302587A
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- China
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- piston
- main body
- central pipe
- central tube
- upper central
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- 239000007788 liquid Substances 0.000 claims abstract description 38
- 238000004519 manufacturing process Methods 0.000 claims abstract description 22
- 125000006850 spacer group Chemical group 0.000 claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 7
- 239000010959 steel Substances 0.000 claims abstract description 7
- 239000003921 oil Substances 0.000 description 12
- 239000010410 layer Substances 0.000 description 11
- 239000012530 fluid Substances 0.000 description 6
- 238000007789 sealing Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 101100008049 Caenorhabditis elegans cut-5 gene Proteins 0.000 description 1
- 101100293261 Mus musculus Naa15 gene Proteins 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Images
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
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
-
- 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/063—Valve or closure with destructible element, e.g. frangible disc
-
- 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
- E21B43/14—Obtaining from a multiple-zone 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)
- Earth Drilling (AREA)
Abstract
The invention relates to an internal debugging fixed-pressure matching production matching tool, which comprises an upper joint, an adjusting nut, an upper central pipe, a main body, a lower central pipe, a spacer bush, a spring, a piston, a core bush and a lower joint, wherein the upper joint is fixedly connected with the upper central pipe; the lower end of the upper central tube is provided with a backing ring, and the spring is sleeved at the lower end of the lower central tube and is arranged between the backing ring and the piston; the upper central pipe is provided with a liquid inlet hole A, a shear ring is arranged between the upper central pipe and the main body, and the shear ring main body seals the liquid inlet hole A; a clamp spring is arranged on the shear ring; the lower end of the main body is provided with a liquid inlet hole C, and the lower joint is provided with a liquid inlet hole B; an oil drainage hole is formed in the front end of the piston, and a steel ball is arranged in the oil drainage hole; the device can set the opening pressure of the tool aiming at different stratum pressures, control the liquid production amount, control the production of the high-water-content and high-yield liquid layer by adopting the corresponding higher opening pressure, amplify the production pressure difference of the thin differential layer and improve the liquid supply capacity of the thin differential layer.
Description
Technical Field
The invention relates to the field of oilfield development, in particular to an internal debugging fixed pressure production allocation matching tool.
Background
As oil field development enters a high-water-content stage, contradictions between oil layers are increasingly prominent. The production allocation technology is one of the important means for stabilizing oil and lowering water. At present, only water plugging measures of a high permeable layer and a high water-bearing layer are applied to layered oil extraction, but the liquid production amount is increased along with the annual deterioration of the production effect, and interlayer interference is generated on the low permeable layer. Therefore, the existing production allocation tool can not ensure the layered constant pressure control and can not meet the requirement of reasonable exploitation of the oil well.
Disclosure of Invention
In order to make up for the defects of the prior art, the invention aims to provide an internal debugging fixed pressure matching production matching tool, which sets the opening pressure of the tool aiming at different laminate pressures, controls the liquid production amount, controls the production of a high water content and high liquid yield layer by adopting a corresponding higher opening pressure, amplifies the production pressure difference of a thin differential layer and improves the liquid supply capacity of the thin differential layer.
The invention aims to realize the technical scheme that the internal debugging fixed-pressure production allocation matching tool comprises an upper joint, an adjusting nut, an upper central pipe, a main body, a lower central pipe, a spacer bush, a spring, a piston, a core bush and a lower joint; the upper end and the lower end of the main body are respectively in threaded connection with the upper joint and the lower joint, the adjusting nut, the upper central tube, the lower central tube, the spacer bush, the spring, the piston and the core bush are all arranged in the main body, the lower end of the adjusting nut is in threaded connection with the upper central tube, and the lower end of the upper central tube is in threaded connection with the lower central tube; the lower end of the lower central tube is in threaded connection with the core sleeve and the lower joint; the upper end of the piston is sleeved with the lower central tube and is in sliding connection with the lower central tube, and the lower end of the piston is sleeved with the core sleeve and is in sliding connection with the core sleeve; the technical key points are as follows: the lower end of the upper central tube is provided with a backing ring, and the spring is sleeved at the lower end of the lower central tube and is arranged between the backing ring and the piston; the upper end and the lower end of the spacer sleeve are respectively sleeved with the lower end of the upper central pipe and the front end of the piston and are in sliding connection;
the upper central pipe is provided with a liquid inlet hole A, a shear ring is arranged between the upper central pipe and the main body, the inner hole of the main body is provided with steps, and the upper end of the main body is provided with an outer hole; the inner hole of the shear ring is matched with the upper central pipe and is fixed on the upper central pipe through shear nails; the shear ring main body seals the liquid inlet hole A; a clamp spring is arranged on the shear ring; the lower end of the main body is provided with a liquid inlet hole C, and the lower joint is provided with a liquid inlet hole B; an oil drainage hole is formed in the front end of the piston, and a steel ball is arranged in the oil drainage hole;
the piston lower extreme is equipped with the arc surface, lower clutch upper end hole has the inclined plane, the arc surface of piston lower extreme and lower clutch upper end inclined plane chamfer line contact form hard seal.
The invention has the beneficial effects that:
(1) the liquid yield can be controlled by setting the opening pressure of the tool aiming at different stratum pressures, the high-water-content and high-yield liquid layers are produced by adopting corresponding higher opening pressure, the production pressure difference of the thin differential layer is amplified, and the liquid supply capacity of the thin differential layer is improved.
(2) The opening pressure can be adjusted according to different floor pressures without disassembly and assembly; when the well is lowered, the internal shear ring 5 closes the liquid inlet hole A to realize environment-friendly construction.
Drawings
Fig. 1 is a schematic structural diagram of the internal debugging fixed-pressure match production kit;
FIG. 2 is a schematic view of the connection structure of the shear ring and the upper center tube;
FIG. 3 is a schematic view of a partial structure of the internal debugging fixed-pressure match production kit;
fig. 4 is a schematic view of a connection structure of the piston and the lower joint.
Specific names of the structures in fig. 1-4 are: the oil drain pipe comprises an upper joint 1, an adjusting screw cap 2, an upper central pipe 3, a main body 4, a step 4-1, an outer hole 4-2, a shear ring 5, a clamp spring groove 5-1, a clamp spring 6, a shear pin 7, a lower central pipe 8, a backing ring 9, a spacer sleeve 10, a spring 11, a steel ball 12, a piston 13, an arc surface 13-1, a core sleeve 14, a lower joint 15, an inclined surface 15-1, a liquid inlet hole A16, a liquid inlet hole B17, a liquid inlet hole C18 and an oil drain hole 19.
Detailed Description
Referring to fig. 1-4, the specific structure of this embodiment is that an internal debugging fixed-pressure matching production kit includes an upper joint 1, an adjusting nut 2, an upper center tube 3, a main body 4, a lower center tube 8, a spacer sleeve 10, a spring 11, a piston 13, a core sleeve 14, and a lower joint 15; the upper end and the lower end of the main body 4 are internally and externally threaded with the upper joint 1 and the lower joint 15 respectively, the adjusting screw cap 2, the upper central tube 3, the lower central tube 8, the spacer bush 10, the spring 11, the piston 13 and the core bush 14 are arranged in the main body 4, the lower end of the adjusting screw cap 2 is internally and internally threaded with the upper central tube 3, and the lower end of the upper central tube 3 is internally and externally threaded with the upper end of the lower central tube 8; the external thread at the lower end of the lower central tube 8 is connected with the internal threads of the core sleeve 14 and the lower joint 15; the upper end of the piston 13 is sleeved with the lower central tube 8 and is in sliding connection, and the lower end of the piston 13 is sleeved with the core sleeve 14 and is in sliding connection;
the lower end of the upper central tube 3 is provided with a backing ring 9, and the spring 11 is sleeved at the lower end of the lower central tube 08 and is arranged between the backing ring 9 and the piston 13; the main body of the spacer bush 10 is sleeved with a spring, and the upper end and the lower end of the spacer bush 10 are respectively sleeved with the lower end of the upper central tube 3 and the front end of the piston 13 and are connected in a sliding manner;
the upper central pipe 3 is provided with a liquid inlet hole A16, a shear ring 5 is arranged between the upper central pipe 3 and the main body 4, the inner hole of the main body 4 is provided with a step 4-1, and the upper end of the main body 4 is provided with an outer hole 4-2; the inner hole of the shear ring 5 is matched with the upper central pipe 3 and is fixed on the upper central pipe 3 through a shear pin 7; the main body of the shear ring 5 seals a liquid inlet A16; a clamp spring groove 5-1 is formed in the shear ring 5, and a clamp spring 6 is arranged in the clamp spring groove 5-1; the lower end of the main body 4 is provided with a liquid inlet hole C18, and the lower joint 15 is provided with a liquid inlet hole B17; an oil drainage hole 19 is formed in the front end of the piston 13, and a steel ball 12 is arranged in the oil drainage hole 19;
the lower end of the piston 13 is provided with an arc surface 13-1, an inner hole at the upper end of the lower joint 15 is provided with an inclined surface 15-1, and the arc surface 13-1 at the lower end of the piston 13 is in chamfer line contact with the inclined surface 15-1 at the upper end of the lower joint to form hard seal.
The invention has the structural characteristics that:
the main body 4 internal thread top connection 1 and the lower connection 15 external thread connection of the internal debugging fixed-pressure matching production kit, the external thread of the lower central tube 8, the lower connection 15 and the internal thread connection of the core sleeve 14, and the internal hole matching of the piston 13. The steel ball 12 is arranged in the inner hole of the piston 13, and the spring 11 is sleeved on the lower end surface of the lower central tube 8 and is in surface contact with the piston 13. The inner hole of the spacer sleeve 10 is matched with the piston 13, and the backing ring 9 is arranged on the upper part of the spring 11. Go up center tube 3 and 3 threaded connection of center tube down, cut 5 holes of ring and the cooperation of last center tube 3 and pass through shear pin 7 to be fixed on last center tube, jump ring 6 inlays on shear ring 5. The external thread of the adjusting screw cap 2 is matched with the internal thread of the upper central tube 3.
The working principle of the invention is as follows:
1. when the tool goes down the well, external well fluid cannot enter the tool from the fluid inlet hole B, C because the shear ring 5 closes the fluid inlet hole A16 on the upper central pipe 3, and the tool plays a blowout prevention role.
2. After the tool is lowered to the designed depth, the shearing nail 7 is pressed and sheared in the oil pipe when the packer is released. The shear ring 5 moves upwards under the pushing of pressure, the inlaid snap spring 6 is clamped on the step 4-1 in the main body 4, and the shear ring 5 is prevented from moving downwards to close the liquid inlet hole A16. And the adjusting nut 2 is rotated on the ground to adjust the pre-tightening force of the spring 11 according to the pressure of the strata in different layers.
3. The upper central pipe 3 is driven by rotating the adjusting nut 2 to compress the spring 11 on site, the pretightening force of the spring is adjusted, and the gasket is not required to be additionally installed or reduced in a tool workshop, so that the pressure can be adjusted, and the purpose of layered production allocation is realized.
4. The spacer 10 is used for coating the spring 11 and then injecting lubricating oil into the spring 11, so that the spring 11 can be protected from corrosion of well fluid. After the spring 11 is compressed, the upper oil drain hole 19 of the piston 13 can drain the lubricating oil from the upper end, and the inner steel ball 12 is equivalent to a one-way valve to prevent external well fluid from entering.
5. The piston 13 and the lower joint 15 realize linear sealing, namely hard sealing, so that the sealing effect is prevented from being influenced by the fact that soft sealing elements are damaged by well fluid temperature and reciprocating motion of O-shaped rubber sealing rings, GREEN rings and the like.
6. The liquid inlet channel formed by the intersection of the liquid inlet hole B17 and the liquid inlet hole C18 pushes the piston 13 to move upwards, so that sand setting accumulation can be prevented, and the blockage of the liquid inlet channel is avoided. After the well liquid enters from the hole liquid inlet holes B and C, pressure acts on the piston 13, and when the pressure is larger than the pretightening force of the spring 11, the well liquid ascends the piston 13 and enters the inside of the tool to achieve the purpose of production allocation.
7. The outer hole 4-2 at the upper end of the main body 4 plays a role in exhausting when the shear ring 5 moves upwards, and can balance the pressure difference between the inside and the outside and ensure that the shear ring 5 cannot move upwards in advance.
Claims (1)
1. The internal debugging fixed-pressure production matching tool comprises an upper joint, an adjusting nut, an upper central pipe, a main body, a lower central pipe, a spacer bush, a spring, a piston, a core bush and a lower joint; the lower end of the adjusting screw cap is in threaded connection with the upper central tube, and the lower end of the upper central tube is in threaded connection with the lower central tube; the lower end of the lower central tube is in threaded connection with the core sleeve and the lower joint; the upper end of the piston is sleeved with the lower central tube and is in sliding connection with the lower central tube, and the lower end of the piston is sleeved with the core sleeve and is in sliding connection with the core sleeve; the method is characterized in that: the lower end of the upper central tube is provided with a backing ring, and the spring is sleeved at the lower end of the lower central tube and is arranged between the backing ring and the piston; the upper end and the lower end of the spacer sleeve are respectively sleeved with the lower end of the upper central pipe and the front end of the piston and are in sliding connection;
the upper central pipe is provided with a liquid inlet hole A, a shear ring is arranged between the upper central pipe and the main body, the inner hole of the main body is provided with steps, and the upper end of the main body is provided with an outer hole; the inner hole of the shear ring is matched with the upper central pipe and is fixed on the upper central pipe through shear nails; the shear ring main body seals the liquid inlet hole A; a clamp spring is arranged on the shear ring; the lower end of the main body is provided with a liquid inlet hole C, and the lower joint is provided with a liquid inlet hole B; an oil drainage hole is formed in the front end of the piston, and a steel ball is arranged in the oil drainage hole;
the piston lower extreme is equipped with the arc surface, lower clutch upper end hole has the inclined plane, the arc surface of piston lower extreme and lower clutch upper end inclined plane chamfer line contact form hard seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011326203.1A CN112302587A (en) | 2020-11-24 | 2020-11-24 | Internal debugging fixed-pressure matching tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011326203.1A CN112302587A (en) | 2020-11-24 | 2020-11-24 | Internal debugging fixed-pressure matching tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112302587A true CN112302587A (en) | 2021-02-02 |
Family
ID=74335485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011326203.1A Pending CN112302587A (en) | 2020-11-24 | 2020-11-24 | Internal debugging fixed-pressure matching tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112302587A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4526229A (en) * | 1983-02-14 | 1985-07-02 | Gulf Oil Corporation | Hydraulic packer assembly |
| CN2849158Y (en) * | 2005-12-27 | 2006-12-20 | 大庆油田有限责任公司 | Water blocking downhole production allocator |
| CN201176866Y (en) * | 2008-04-17 | 2009-01-07 | 大庆油田有限责任公司 | Fixed pressure production mandrel |
| CN203640704U (en) * | 2014-01-04 | 2014-06-11 | 大庆红祥寓科技有限公司 | Production allocation machine |
| CN204041000U (en) * | 2014-07-31 | 2014-12-24 | 杭州海勒科技有限公司 | A kind of oil field kelly bar plash proof valve |
| CN108894760A (en) * | 2018-09-03 | 2018-11-27 | 中国石油集团川庆钻探工程有限公司 | Valve pipe combined type underground throttle for gas well production and use method thereof |
| CN213869831U (en) * | 2020-11-24 | 2021-08-03 | 辽宁新华仪器有限公司 | Internal debugging fixed-pressure matching tool |
-
2020
- 2020-11-24 CN CN202011326203.1A patent/CN112302587A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4526229A (en) * | 1983-02-14 | 1985-07-02 | Gulf Oil Corporation | Hydraulic packer assembly |
| CN2849158Y (en) * | 2005-12-27 | 2006-12-20 | 大庆油田有限责任公司 | Water blocking downhole production allocator |
| CN201176866Y (en) * | 2008-04-17 | 2009-01-07 | 大庆油田有限责任公司 | Fixed pressure production mandrel |
| CN203640704U (en) * | 2014-01-04 | 2014-06-11 | 大庆红祥寓科技有限公司 | Production allocation machine |
| CN204041000U (en) * | 2014-07-31 | 2014-12-24 | 杭州海勒科技有限公司 | A kind of oil field kelly bar plash proof valve |
| CN108894760A (en) * | 2018-09-03 | 2018-11-27 | 中国石油集团川庆钻探工程有限公司 | Valve pipe combined type underground throttle for gas well production and use method thereof |
| CN213869831U (en) * | 2020-11-24 | 2021-08-03 | 辽宁新华仪器有限公司 | Internal debugging fixed-pressure matching tool |
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