CN208220721U - A kind of float-ball type anti-backflow float collar - Google Patents
A kind of float-ball type anti-backflow float collar Download PDFInfo
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- CN208220721U CN208220721U CN201820651288.2U CN201820651288U CN208220721U CN 208220721 U CN208220721 U CN 208220721U CN 201820651288 U CN201820651288 U CN 201820651288U CN 208220721 U CN208220721 U CN 208220721U
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- shell
- bracket
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- float collar
- ball
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Abstract
The utility model discloses a kind of float-ball type anti-backflow float collar, including float collar shell, shell；The shell is detachably connected float collar shell, flotation chamber of the composition for nylon ball free movement in shell, float collar shell；Nylon ball and cage are equipped in the float collar shell, it is set in cage there are three bracket, the groove between bracket forms diversion trench, and the spacing between the bracket is less than the diameter of nylon ball, and the arc-shaped fillet in surface that the bracket on cage is contacted with nylon ball, arc fillet is in rounding off on the surface of bracket.By the structure by the edge designs of the cage inner support of support nylon ball at arcuation fillet, effective reduce is worn when nylon ball moves under the impact of fluid with caused by bracket edge friction；By the inner surface recesses portion of block ring be designed to the consistent groove of nylon ball surface curvature, enable groove and nylon spherical at face contact, so that significant sealing affection improves.
Description
Technical field
The utility model relates to casing and cementing technical field, in particular to a kind of float-ball type anti-backflow float collar.
Background technique
In Cementing operation, the anti-down float collar that returns is a kind of essential casing hardware, wherein float-ball type float collar
Because structure is simple, reliable performance, it is used widely in SHENGLI PETROLEUM AREA, specifically is used to control the lower line position of fluid well cementing material
It sets, to ensure well cementing material length in pipe and prevent from flowing backwards, while also there is the rubber plug bruising in well cementation, control artificial bottom of a well
The effect of depth and the height of casing string lower feet cement plug, to guarantee the sealing quality of production string bottom, but for a long time
The environmental work in well, the defect performance of structure is obvious in existing float collar, and what internal structure generated washes away friction or corrosion, thus
Lead to float collar seal failure, situations such as fluid returns occurs.
Summary of the invention
The purpose of this utility model is aiming at defect of the existing technology, and it is simple to provide a kind of structure, sealing effect
Stable float-ball type anti-backflow float collar.
The technical solution of the utility model is: a kind of float-ball type anti-backflow float collar, including float collar shell, shell；
The shell is detachably connected float collar shell；
It is equipped with nylon ball and cage in the float collar shell, is evenly distributed on the same cross section of the cage there are three bracket,
The free end of the bracket forms the gap for accepting nylon ball, the groove type between the nylon ball, float collar shell and bracket
At diversion trench, the gap between the bracket is less than the diameter of nylon ball, and the surface that the bracket on cage is contacted with nylon ball is in
Arc fillet, arc fillet is in rounding off on the surface of bracket；
Block ring is equipped in the shell, block ring is the cavity of cone, and the cavity of the cone is divided into big circular cone
Portion, concave part, roundlet tapering, the concave part is the groove equipped with spherical surface, and the spheric curvature of groove and nylon ball surface are bent
Rate is consistent, and the block ring, float collar shell and bracket form the flotation chamber for nylon ball free movement.
Big conus portion in the block ring, concave part, roundlet tapering surface rounding off.
The arc-shaped fillet in the surface contacted on the bracket with nylon ball, the arc fillet are the fan-shaped fillet of protrusion.
The arc-shaped fillet in the surface contacted on the bracket with nylon ball, curved circular angle spherical groove, the groove
Curvature is consistent with nylon ball surface curvature.
The shell is made of ceramal.
The choked flow ring surface is coated with one layer of high temperature resistance to erosion hard films.
Compared with prior art, having the advantage that
1. being modified as the structure of arcuation fillet, by the bracket edge design by the cage of support nylon ball to reduce nylon
It is worn when ball moves under the impact of fluid and caused by the bracket edge of cage rubs.
2. restrictive ring seal face and one layer of high temperature resistance to erosion hard films of smearing at the bracket of cage, enhance its antiscour
Ability, and reduce flow resistance, secondly by shell improvements at by cermet material, even if under the complex environment of underground,
With stronger heat resisting and pressure resisting flushing resistance, to realize effectively sealing.
3. by the inner surface recesses portion of block ring be designed to the consistent groove of nylon ball surface curvature, enable groove
With nylon spherical at face contact, compared to not having reeded line contact sealing effect more preferable before.
4. by setting up roundlet tapering in block ring so that the nylon ball that uses of long-term operation because downhole environment washes away and
After corrosion, once generating deformation, and when concave part is not able to satisfy sealing effect, sphere can be by pasting with roundlet tapering inner surface
Sealing is closed, multi-sealed mechanism is played.
Detailed description of the invention
Fig. 1 is the first embodiment structure schematic diagram of the utility model；
Fig. 2 is the structural schematic diagram of cage；
Fig. 3 is block ring structural schematic diagram；
Fig. 4 is second of embodiment structure schematic diagram of the utility model；
In figure: 1. nylon balls, 2. block rings, 3. shells, 4. float collar shells, 5. cages, 6. brackets, 7. diversion trenches, 8. recessed
Groove portion, 9. big conus portions, 10. roundlet taperings.
Specific embodiment
Here is that the present invention will be further described in conjunction with the accompanying drawings and embodiments.
Embodiment one
- Fig. 3 referring to Fig.1, the present embodiment provides a kind of float-ball type anti-backflow float collar, including float collar shell 4, shell 3, float collars
Shell 4 is detachably connected shell 3, and the flotation chamber for 1 free movement of nylon ball is formed in shell 3, float collar shell 4, is set in shell 3
It is equipped with block ring 2, is conical cavity in block ring 2, conical cavity is divided into big conus portion 9, concave part 8, roundlet tapering
10；It is equipped with cage 5, nylon ball 1 in float collar shell 4, when nylon ball 1 is bonded with the surface of block ring 2, is capable of forming effective
It seals, is uniformly arranged on the same cross section of 5 inner surface of cage there are three bracket 6, the free end of bracket 6 is formed for accepting nylon
The gap of ball 1.The surface contacted on bracket 6 with nylon ball 1 is in raised arc fillet, the surface of bracket 6 and the arc of protrusion
Fillet smooth transition, it is diversion trench 7 that 6 two sides of bracket, which are located at the concave surface formed on cage,.In well cementing operation, by pumping to underground
The desired amount of fluid well cementing material is injected, after fluid well cementing material enters in shell 3, then is flowed in float collar shell 4, fluid well cementation
Material pushes down on nylon ball 1 and shifts at cage 5, and nylon ball 1 is done irregularly by 6 support of bracket in cage 5 or in cage 5
Movement, fluid well cementing material continue to flow downward by diversion trench 7, into well in complete perfusion work.
When fluid well cementing material is flow backwards, the fluid well cementing material of refluence pushes nylon ball 1 to block ring 2, nylon
Ball 1 forms sealing contact surface when being bonded with the concave part 8 on block ring 2, to prevent to flow backwards.
This embodiment example is made using shell 3 of ceramal, and to be coated with one layer of high temperature resistance to erosion hard on block ring 2 surface
Plasma membrane, so that intensity is bigger in structure, the effective performance for improving whole heatproof, pressure resistance, resistance to erosion, thus complicated in well
It is more stable in environment work.
Embodiment two
Referring to Fig. 4, the present embodiment two is basically the same as the first embodiment, the difference is that: it is connect on bracket 6 with nylon ball 1
The arc-shaped fillet in the surface of touching, which is spherical groove, and groove curvature is consistent with 1 surface curvature of nylon ball, this
On the one hand sample design makes the bracket 6 for possessing the groove of round and smooth spherical surface, on the other hand better support nylon ball reduces bracket
The friction on 6 surfaces and 1 surface of nylon ball, makes nylon ball 1 be not susceptible to deformation.
The utility model is modified as the structure of arcuation fillet by the bracket edge design by the cage of support nylon ball, with
It reduces when nylon ball moves under the impact of fluid and is worn caused by the bracket edge friction of cage.Restrictive ring seal face and
One layer of high temperature resistance to erosion hard films are smeared at the bracket of cage, enhance its erosion resistibility, and reduce flow resistance, secondly will
Shell improvements are at by cermet material, even if under the complex environment of underground, it may have stronger heat resisting and pressure resisting abrasion resistance
Can, to realize effectively sealing.By the inner surface recesses portion of block ring be designed to the consistent groove of nylon ball surface curvature, make
Groove can be with nylon spherical at face contact, compared to not having reeded line contact sealing effect more preferable before.Pass through block ring
Roundlet tapering is inside set up, so that the nylon ball that uses of long-term operation is because downhole environment washes away and after corroding, once deformation is generated, and
When concave part is not able to satisfy sealing effect, sphere can by with roundlet tapering inner surface gluing, sealing, play multi-sealed machine
System.
The utility model is not limited to above-mentioned embodiment, within the knowledge of those skilled in the art,
The present invention can also be realized without departing from the purpose of the present invention. Make a variety of changes, and the content after variation still falls within the utility model
Protection scope.
Claims (6)
1. a kind of float-ball type anti-backflow float collar, it is characterised in that: including float collar shell, shell；
The shell is detachably connected float collar shell；
It is equipped with nylon ball and cage in the float collar shell, uniformly distributed on the same cross section of the cage there are three brackets, described
The free end of bracket forms the gap for accepting nylon ball, and the groove formation between the nylon ball, float collar shell and bracket is led
Chute, the gap between the bracket is less than the diameter of nylon ball, and the surface that the bracket on cage is contacted with nylon ball is arc-shaped
Fillet, arc fillet is in rounding off on the surface of bracket；
It is equipped with block ring in the shell, block ring is the cavity of cone, and the cavity of the cone is divided into big conus portion, recessed
Groove portion, roundlet tapering, the concave part are the groove equipped with spherical surface, and the spheric curvature of groove and nylon ball surface curvature one
It causes, the block ring, float collar shell and bracket form the flotation chamber for nylon ball free movement.
2. a kind of float-ball type anti-backflow float collar according to claim 1, it is characterised in that: big conus portion in the block ring,
Concave part, roundlet tapering surface rounding off.
3. a kind of float-ball type anti-backflow float collar according to claim 1, it is characterised in that: contacted on the bracket with nylon ball
The arc-shaped fillet in surface, the arc fillet be protrusion fan-shaped fillet.
4. a kind of float-ball type anti-backflow float collar according to claim 1, it is characterised in that: contacted on the bracket with nylon ball
The arc-shaped fillet in surface, curved circular angle spherical groove, the groove curvature is consistent with nylon ball surface curvature.
5. a kind of float-ball type anti-backflow float collar according to claim 1, it is characterised in that: the shell is ceramal system
At.
6. a kind of float-ball type anti-backflow float collar according to claim 1, it is characterised in that: the choked flow ring surface is coated with one layer
High temperature resistance to erosion hard films.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820651288.2U CN208220721U (en) | 2018-05-03 | 2018-05-03 | A kind of float-ball type anti-backflow float collar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820651288.2U CN208220721U (en) | 2018-05-03 | 2018-05-03 | A kind of float-ball type anti-backflow float collar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208220721U true CN208220721U (en) | 2018-12-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820651288.2U Active CN208220721U (en) | 2018-05-03 | 2018-05-03 | A kind of float-ball type anti-backflow float collar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208220721U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114041396A (en) * | 2021-07-17 | 2022-02-15 | 广西壮族自治区地质环境监测站 | Abandonment mine nursery stock afforestation maintenance is with driping irrigation equipment |
-
2018
- 2018-05-03 CN CN201820651288.2U patent/CN208220721U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114041396A (en) * | 2021-07-17 | 2022-02-15 | 广西壮族自治区地质环境监测站 | Abandonment mine nursery stock afforestation maintenance is with driping irrigation equipment |
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