CN204457610U - A kind of underground water-injection ball seat - Google Patents
A kind of underground water-injection ball seat Download PDFInfo
- Publication number
- CN204457610U CN204457610U CN201520100464.XU CN201520100464U CN204457610U CN 204457610 U CN204457610 U CN 204457610U CN 201520100464 U CN201520100464 U CN 201520100464U CN 204457610 U CN204457610 U CN 204457610U
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- CN
- China
- Prior art keywords
- ball seat
- top connection
- pressure cap
- piston
- steel ball
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- Expired - Fee Related
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Abstract
The utility model provides a kind of underground water-injection ball seat, mainly comprise top connection, lower contact, steel ball, sealed ball seat, pressure cap, top connection there is 3-8 notch cuttype centre bore, and between adjacent two notch cuttype centre bores, there is taper seat transition, top connection is connected with lower contact by the external screw thread of its lower end, a pressure cap is fixed with in top connection lower end, pressure cap is hollow cylinder, the sealed ball seat of an annular is set in the upper end of pressure cap, sealed ball seat is located at the bottom of getting out of a predicament or an embarrassing situation of top connection centre bore, steel ball lower end is provided with piston, piston upper end is provided with the arc groove cooperatively interacted with steel ball, piston is provided with O-ring seal, the utility model structure is simple, adopt notch cuttype centre bore, be applied to high angle hole, water injection of horizontal well operation, good sealing effect, the generation of overflow can be prevented simultaneously.
Description
Technical field:
The utility model relates to a kind of underground work device, particularly relates to a kind of underground water-injection ball seat.
Background technology:
Oil is a kind of thickness, dark brown liquid.There is petroleum storage upper crustal some areas.Main component is the mixture of various alkane, cycloalkane, aromatic hydrocarbon.The one-tenth oil machine reason of oil has biogenic deposit to become oil and petrochemical industry oil two kinds of theories, and the former more widely accepts, think oil be ancient times ocean or lake in biology formed through very long evolution, belong to biogenic deposit and become oily, non-renewable; The latter thinks that oil is generated by the carbon of itself in the earth's crust, has nothing to do with biology, renewable.Oil is mainly used as fuel oil and gasoline, is also the raw material of many chemical industries as solution, chemical fertilizer, pesticide and plastics etc." oil " this Chinese draws together first time name by big science man in Northern Song Dynasty Shen.
Stone oil properties is different because of the place of production, and density is 0.8-1.0g/cm3, and range of viscosities is very wide, freezing point difference very large (30 ~-60 degrees Celsius), boiling spread be normal temperature to more than 500 degrees Celsius, dissolve in multiple organic solvent, water insoluble, but emulsion can be formed with water.The composition of the oil in but different oil fields and appearance can be distinguished very large.Oil is mainly used as fuel oil and gasoline, and fuel oil and gasoline are at compositions in 2012 one of most important secondary energy sources in the world.Oil is also the raw material of many chemical industries as solvent, chemical fertilizer, pesticide and plastics etc.The oil 88% of exploitation in 2012 is used as fuel, other 12% as the raw material of chemical industry.In fact, oil is a kind of non-renewable raw material.
The down-hole ball seat that oil extraction in oil field uses in producing, in straight well, application has the features such as good airproof performance, resistance to pressure reduction are high, Sealing period is long, has become one of the important tool of set packer, the various sliding sleeve of switch.Find in application at the scene, institute's throwing steel ball arrives ball seat at horizontal segment because Action of Gravity Field is very difficult, cause the sealing failure between steel ball and ball seat, can not build the pressure successfully in oil pipe, cause downhole tool cisco unity malfunction, so that be difficult to the application requirement meeting horizontal well, bring tremendous influence to oil field Development and Production.When oil-water well snubbing serving, for preventing oil pipe overflow, oil field adopts tubing plug to seal oil pipe, major defect is: tubing plug is anchored on tube inner wall by anchor body, very serious to tube inner wall infringement, tubing plug can only more than shutoff downhole tool oil pipe, cannot the tubing string of shutoff downhole tool one lower part.
Utility model content:
In order to solve the problem, it is simple that the utility model provides a kind of structure, has the technical scheme that excellent sealing effect can prevent overflow simultaneously:
A kind of underground water-injection ball seat, mainly comprise top connection, lower contact, steel ball, sealed ball seat, pressure cap, top connection there is 3-8 notch cuttype centre bore, and between adjacent two notch cuttype centre bores, there is taper seat transition, top connection is connected with lower contact by the external screw thread of its lower end, a pressure cap is fixed with in top connection lower end, pressure cap is hollow cylinder, the sealed ball seat of an annular is set in the upper end of pressure cap, sealed ball seat is located at the bottom of getting out of a predicament or an embarrassing situation of top connection centre bore, steel ball lower end is provided with piston, piston upper end is provided with the arc groove cooperatively interacted with steel ball, piston is provided with O-ring seal.
As preferably, piston is in falling " T " font, and steel ball is arranged on the arc groove of piston upper end.
As preferably, also comprise the shear pin be arranged on sealing ring, sealing ring is stuck in the centre bore of lower contact by shear pin.
As preferably, the gradient of taper seat is 15 degree of-20 degree.
The beneficial effects of the utility model are:
(1) the utility model adopts notch cuttype centre bore, in high angle hole, horizontal well in application, steel ball can raise finally setting on sealed ball seat step by step, can seal well between steel ball and ball seat, overcome existing ball seat in high angle hole, horizontal well, because steel ball Action of Gravity Field successfully can not arrive ball seat, poorly sealed deficiency.
(2) sealing ring of the present utility model is stuck in the centre bore of lower contact by shear pin, can prevent the generation of overflow.
Accompanying drawing illustrates:
Fig. 1 is structural representation of the present utility model.
Detailed description of the invention:
For making goal of the invention of the present utility model, technical scheme and advantage clearly, below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.
As shown in Figure 1, a kind of underground water-injection ball seat, mainly comprises top connection 1, lower contact 2, steel ball 3, sealed ball seat 4, pressure cap 5, top connection 1 has 3-8 notch cuttype centre bore, and have taper seat transition between adjacent two notch cuttype centre bores, the gradient of taper seat is 15 degree of-20 degree.Top connection 1 by the external screw thread of its lower end with under connect 2 and be connected, a pressure cap 5 is fixed with in top connection 1 lower end, pressure cap 5 is hollow cylinder, the sealed ball seat 4 of an annular is set in the upper end of pressure cap 5, sealed ball seat 4 is located at the bottom of getting out of a predicament or an embarrassing situation of top connection 1 centre bore, steel ball 3 lower end is provided with piston 6, piston 6 upper end is provided with the arc groove cooperatively interacted with steel ball 3, piston 6 lower end is provided with O-ring seal 7, piston 6 is in falling " T " font, steel ball 3 is arranged on the arc groove of piston 6 upper end, it is made to be separated with sealed ball seat 4, also comprise the shear pin 8 be arranged on sealing ring 7, sealing ring 7 is stuck in the centre bore of lower contact 2 by shear pin 8.
When oil-water well operation lower tubular column, top connection 1 is connected with tubing string, seal the centre bore of lower contact 2 with the piston 6 of O-ring seal 7 in the process of going into the well, the generation of overflow can be prevented, when under tubing string behind precalculated position, put into steel ball 3 from ground, then pump into liquid-driving steel ball 3 to huge discharge in well and roll in oil pipe and move ahead.When steel ball 3 arrives near the Cascade ball seat position being used for horizontal well, top connection 1 is entered inner under the promotion of liquid in pipe, and by two-stage staged step, progressively be lifted height until arrive sealed ball seat 4, realization sealing builds the pressure, overcome existing ball seat in high angle hole, horizontal well, because steel ball Action of Gravity Field successfully can not arrive ball seat, poorly sealed deficiency.
Above-described embodiment is preferred embodiment of the present utility model; it is not the restriction to technical solutions of the utility model; as long as without the technical scheme that creative work can realize on the basis of above-described embodiment, all should be considered as falling within the scope of the rights protection of the utility model patent.
Claims (4)
1. a underground water-injection ball seat, mainly comprise top connection (1), lower contact (2), steel ball (3), sealed ball seat (4), pressure cap (5), it is characterized in that: described top connection (1) has 3-8 notch cuttype centre bore, and between adjacent two notch cuttype centre bores, there is taper seat transition, described top connection (1) is connected with described lower contact (2) by the external screw thread of its lower end, a described pressure cap (5) is fixed with in described top connection (1) lower end, described pressure cap (5) is hollow cylinder, the described sealed ball seat (4) of an annular is set in the upper end of described pressure cap (5), described sealed ball seat (4) is located at the bottom of getting out of a predicament or an embarrassing situation of described top connection (1) centre bore, described steel ball (3) lower end is provided with piston (6), described piston (6) upper end is provided with the arc groove cooperatively interacted with described steel ball (3), described piston (6) lower end is provided with O-ring seal (7).
2. a kind of underground water-injection ball seat according to claim 1, is characterized in that: described piston (6) is in falling " T " font, and described steel ball (3) is arranged on the arc groove of described piston (6) upper end.
3. a kind of underground water-injection ball seat according to claim 1, it is characterized in that: also comprise the shear pin (8) be arranged on described sealing ring (7), described sealing ring (7) is stuck in the centre bore of described lower contact (2) by described shear pin (8).
4. a kind of underground water-injection ball seat according to claim 1, is characterized in that: the gradient of described taper seat is 15 degree of-20 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520100464.XU CN204457610U (en) | 2015-02-09 | 2015-02-09 | A kind of underground water-injection ball seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520100464.XU CN204457610U (en) | 2015-02-09 | 2015-02-09 | A kind of underground water-injection ball seat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204457610U true CN204457610U (en) | 2015-07-08 |
Family
ID=53664512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520100464.XU Expired - Fee Related CN204457610U (en) | 2015-02-09 | 2015-02-09 | A kind of underground water-injection ball seat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204457610U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109469461A (en) * | 2018-12-06 | 2019-03-15 | 中国石油天然气股份有限公司 | Horizontal well subsection huff and puff sand control device |
-
2015
- 2015-02-09 CN CN201520100464.XU patent/CN204457610U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109469461A (en) * | 2018-12-06 | 2019-03-15 | 中国石油天然气股份有限公司 | Horizontal well subsection huff and puff sand control device |
| CN109469461B (en) * | 2018-12-06 | 2023-09-26 | 中国石油天然气股份有限公司 | Sand control device is hugged and disbursed in horizontal well segmentation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150708 Termination date: 20160209 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |