CN107035336B - Self-control blanking plug - Google Patents
Self-control blanking plug Download PDFInfo
- Publication number
- CN107035336B CN107035336B CN201710267371.XA CN201710267371A CN107035336B CN 107035336 B CN107035336 B CN 107035336B CN 201710267371 A CN201710267371 A CN 201710267371A CN 107035336 B CN107035336 B CN 107035336B
- Authority
- CN
- China
- Prior art keywords
- sealing
- slip
- self
- central tube
- cone
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000007789 sealing Methods 0.000 claims abstract description 40
- 238000005086 pumping Methods 0.000 claims abstract description 14
- 239000010985 leather Substances 0.000 claims abstract description 10
- 230000002093 peripheral effect Effects 0.000 claims description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 3
- 238000006731 degradation reaction Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000006835 compression Effects 0.000 abstract description 2
- 238000007906 compression Methods 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 4
- 238000012856 packing Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/126—Packers; Plugs with fluid-pressure-operated elastic cup or skirt
- E21B33/1265—Packers; Plugs with fluid-pressure-operated elastic cup or skirt with mechanical slips
Landscapes
- 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)
- Closures For Containers (AREA)
- Pressure Vessels And Lids Thereof (AREA)
Abstract
The invention discloses a self-control blanking plug, comprising: the lower end of the central tube is fixedly provided with a guide cap, the upper end of the central tube is fixedly provided with a sealing rod, the outer side of the central tube is sequentially sleeved with an upper cone, a slip, a lower cone, a rubber cylinder assembly and a pumping leather cup which are mutually abutted from top to bottom, the pumping leather cup is abutted against the guide cap, and contact surfaces which push the slip outwards are formed between the upper cone and the slip and between the lower cone and the slip; the sealing sleeve is sleeved outside the sealing rod, one end of the sealing sleeve abuts against the upper cone, a degradable cap which prevents the sealing rod from extending upwards is fixed at the other end of the sealing sleeve, and a compressible air cavity is formed between the sealing sleeve and the sealing rod. The self-control tubular column blanking plug can be automatically set at an ideal position in a tubular column after being pumped by hydraulic pump, and is sealed and mechanically locked by adopting a compression rubber sleeve component, so that the sealing is reliable.
Description
Technical Field
The invention relates to the technical field of well control in oilfield development, in particular to a blanking plug in a tubular column.
Background
After fracturing operation of oil, gas and water wells, the stratum storage pressure energy is very large, and a production and operation pipe column needs to be lifted up by blowout prevention operation; the inner channel of the pipe column needs to be blocked before the production pipe column is started, in order to prevent the high-pressure fluid in the pipe from being sprayed out in the pipe starting process, a blocking device needs to be put into the pipe column before the pipe column is started, the pipe column is temporarily blocked, and the high-pressure liquid in the pipe starting process is prevented from flowing out.
At present, the pipe column blanking plugs have a plurality of structures, are used for running in by adopting cable operation and also used for pumping after being put into, have certain defects in use, control and sealing effect, and particularly have no positioning on high-pressure pipe columns and pipe column inner lower parts. And the existing blanking plug has a complex structure, sometimes needs a cable or a coiled tubing to be put in, and brings great inconvenience to construction operation.
Disclosure of Invention
The invention aims to provide a self-control blanking plug, which aims to solve the problems in the prior art.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a self-regulating blanking plug, the plug comprising: the lower end of the central tube is fixed with a guide cap, the upper end of the central tube is fixed with a sealing rod, an upper cone, a slip, a lower cone, a rubber cylinder assembly and a pumping leather cup which are mutually abutted are sequentially sleeved on the outer side of the central tube from top to bottom, the pumping leather cup is abutted against the guide cap, and contact surfaces which push the slip outwards are formed between the upper cone and the slip and between the lower cone and the slip; the sealing sleeve is sleeved outside the sealing rod, one end of the sealing sleeve abuts against the upper cone, a degradable cap which prevents the sealing rod from extending upwards is fixed at the other end of the sealing sleeve, and a compressible air cavity is formed between the sealing sleeve and the sealing rod.
Furthermore, a locking ring is arranged on the inner side of the upper cone, and a tooth-shaped structure meshed with the locking ring is arranged on the outer peripheral wall of the central tube.
Further, the outer diameter of the pumping packing cup is slightly larger than the inner diameter of the lowering pipe column.
Furthermore, the degradable cap is made of a material which can perform degradation reaction with chloride ions in water.
The self-control pipe column blanking plug can be automatically set at an ideal position in a pipe column after being pumped by hydraulic pump, and is sealed and mechanically locked by adopting a compression rubber cylinder assembly, so that the sealing is reliable.
Drawings
FIG. 1 is a schematic view of the self-controlling tubular string plug of the present invention;
wherein, 1 degradable cap, 2 seal cartridge, 3 sealing rod, 4 locking rings, 5 last cones, 6 slips, 7 center tubes, 7.1 tooth structure, 8 lower cones, 9 packing element, 10 pump packing leather cup, 11 lead cap, 12 air chambers.
Detailed Description
The present invention will now be more fully described with reference to the following examples. This invention may be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein.
Spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used herein for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
The self-controlled plugging device shown in fig. 1 comprises: the pipe comprises a central pipe 7, a guide cap 11 is fixed at the lower end of the central pipe 7, a sealing rod 3 is fixed at the upper end of the central pipe 7, an upper cone 5, a slip 6, a lower cone 8, a rubber cylinder assembly 9 and a pumping leather cup 10 which are mutually abutted are sequentially sleeved on the outer side of the central pipe 7 from top to bottom, the outer diameter of the pumping leather cup 10 is slightly larger than the inner diameter of a lowering pipe column, the pumping leather cup 10 is abutted on the guide cap 11, the rubber cylinder assembly 9 is composed of rubber cylinders in various forms, contact surfaces which outwards push the slip 6 are formed between the upper cone 5 and the slip 6 and between the lower cone 8 and the slip 6, a locking ring 4 is arranged on the inner side of the upper cone 5, and a tooth-shaped structure 7.1 which is meshed with the locking ring 4 is arranged on the outer peripheral wall of the central pipe 7.
Sealing sleeve 2 has been put to the 3 outside covers of sealing rod, and the one end top of sealing sleeve 2 leans on last cone 5, and its other end is fixed with degradable cap 1, and degradable cap 1 is for can taking place the material of degradation reaction with chlorine ion in aqueous, and degradable cap 1 is spacing to sealing rod 3 in the axial, hinders sealing rod 3 and upwards stretches out, forms the air chamber 12 that can compress between sealing sleeve 2 and the sealing rod 3.
The working principle is as follows:
after the self-control plugging device is thrown into the pipe column, a certain amount of liquid is pumped into the pipe column by the pump truck, and the self-control plugging device is pumped to a certain position at the lower part of the pipe column under the action of the cup packing force, then the pumping is stopped, and the valve is closed; under the action of pumping liquid, the strength of the degradable cap 1 is reduced after a certain time and the degradable cap 1 is slowly degraded, when the strength of the degradable cap 1 is insufficient, the sealing sleeve 2 descends along the sealing rod 3 to compress the air cavity 12, under the action of the downward axial thrust, the upper cone 5 pushes the slips 6 downwards and anchors the slips 6 on the inner wall of the pipe column; according to the principle of acting force and reacting force, the sealing rod 3 drives the guide cap 11 to move upwards, the rubber sleeve component 9 is extruded to seal the pipe column, and liquid on the pipe column is not communicated. The upper cone 5 moves downwards, the locking ring 4 is meshed with a tooth-shaped structure 7.1 on the outer peripheral wall of the central pipe 7, and the sealing state of the rubber cylinder assembly 9 and the anchoring state of the slips 6 are maintained.
The above description is only for the purpose of describing several preferred embodiments of the present application with reference to the accompanying drawings, but the present application is not limited thereto, and any improvements and/or modifications made by those skilled in the art without departing from the spirit of the present application are within the protection scope of the present application.
Claims (4)
1. An autonomous occluder, comprising: the lower end of the central tube is fixed with a guide cap, the upper end of the central tube is fixed with a sealing rod, an upper cone, a slip, a lower cone, a rubber cylinder assembly and a pumping leather cup which are mutually abutted are sequentially sleeved on the outer side of the central tube from top to bottom, the pumping leather cup is abutted against the guide cap, and contact surfaces which push the slip outwards are formed between the upper cone and the slip and between the lower cone and the slip; the sealing sleeve is sleeved outside the sealing rod, one end of the sealing sleeve abuts against the upper cone, a degradable cap which prevents the sealing rod from extending upwards is fixed at the other end of the sealing sleeve, and a compressible air cavity is formed between the sealing sleeve and the sealing rod.
2. The self-controlling plugging device according to claim 1, wherein a locking ring is provided inside the upper cone, and a tooth-shaped structure which is engaged with the locking ring is provided on the outer peripheral wall of the central tube.
3. The self-controlling packer of claim 1, wherein an outer diameter of the pumping cup is slightly larger than an inner diameter of the running string.
4. The self-controlling plugging device according to claim 1, wherein the degradable cap is made of a material capable of undergoing a degradation reaction with chloride ions in water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710267371.XA CN107035336B (en) | 2017-04-21 | 2017-04-21 | Self-control blanking plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710267371.XA CN107035336B (en) | 2017-04-21 | 2017-04-21 | Self-control blanking plug |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107035336A CN107035336A (en) | 2017-08-11 |
| CN107035336B true CN107035336B (en) | 2023-01-31 |
Family
ID=59535622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710267371.XA Active CN107035336B (en) | 2017-04-21 | 2017-04-21 | Self-control blanking plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107035336B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110965957B (en) * | 2018-09-30 | 2021-09-28 | 中国石油天然气股份有限公司 | Blocking tool in oil pipe |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2594461Y (en) * | 2003-01-20 | 2003-12-24 | 李志� | Concentric bridge integrated water make-up device |
| RU2266389C1 (en) * | 2004-05-05 | 2005-12-20 | ООО "НПП Нефтестройпроект" | Packer |
| US8113276B2 (en) * | 2008-10-27 | 2012-02-14 | Donald Roy Greenlee | Downhole apparatus with packer cup and slip |
| CN203050605U (en) * | 2012-12-31 | 2013-07-10 | 托普威尔石油技术股份公司 | Horizontal well section tubular column blanking plug |
| CN203808923U (en) * | 2014-03-27 | 2014-09-03 | 华源益海石油技术开发（北京）有限公司 | Suspension releasing packer for oil-gas water well |
| CN203925409U (en) * | 2014-06-25 | 2014-11-05 | 江苏力克石油机械有限公司 | Tubing plug |
| CN206681697U (en) * | 2017-04-21 | 2017-11-28 | 托普威尔石油技术股份公司 | A kind of automatic control blanking plug |
-
2017
- 2017-04-21 CN CN201710267371.XA patent/CN107035336B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN107035336A (en) | 2017-08-11 |
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