CN205503087U - Casing float shoe - Google Patents
Casing float shoe Download PDFInfo
- Publication number
- CN205503087U CN205503087U CN201620272641.7U CN201620272641U CN205503087U CN 205503087 U CN205503087 U CN 205503087U CN 201620272641 U CN201620272641 U CN 201620272641U CN 205503087 U CN205503087 U CN 205503087U
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- Prior art keywords
- casing
- check valve
- housing
- float shoe
- pod apertures
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Abstract
The utility model discloses a casing float shoe relates to oil machinery technical field, including cylindric casing, casing one end is equipped with the internal thread that links to each other with the sleeve pipe, and the casing middle part is equipped with the check valve, is equipped with cement stone intermediate layer between check valve disk seat and the shells inner wall, and cement stone intermediate layer is equipped with the water conservancy diversion hole, and water conservancy diversion hole intercommunication check valve is outside with the casing, and casing outer wall equipartition is equipped with a plurality of strips of rightting, cement stone intermediate layer expose the part be equipped with for spherical crown form, in the middle part of and with check valve disk seat complex through -hole. Utilize casing one end internal thread to link to each other with the sleeve pipe, grout backward flow when the middle part check valve can prevent to cement the well, the strip is set upright or straight to the casing outside can play the effect from centering, and float shoe one end plays the guide effect for the interbedded spherical crown of cement stone form tip. The utility model has the advantages of simple structure, convenient operation, high temperature resistant, easy brill remove, the adherence phenomenon is avoided from centering to the accessible, has improved well cementation efficiency and cementing quality.
Description
Technical field
This utility model relates to technical field of petroleum machinery, particularly relates to a kind of casing float shoe.
Background technology
In well cementing process cased time, often the end at sleeve pipe connects float shoe, time internal check valve can be avoided cased, the mud in well flows backwards, utilize mud buoyancy to alleviate sleeve pipe gravity, guiding sleeve injects to well center and enters well smoothly, in order to avoid being hampered with transferring because sleeve bottom scraping wall cake and rock cause cannula occlusion.But the cylindric float shoe of routine has near-wall air curtain lower behind shaft bottom, and after well cementation, bottom drilling fluid is bad.
Utility model content
The casing float shoe that technical problem to be solved in the utility model is to provide a kind of simple in construction, brill easy to operate, easy removes, can avoid near-wall air curtain by self-centering, improve well cementation efficiency and cementing quality, substantially increase the service life of float shoe.
For solving above-mentioned technical problem, technical solution adopted in the utility model is:
A kind of casing float shoe, including cylindrical shell, shell one end is provided with the female thread being connected with sleeve pipe, housing central section is provided with check valve, being provided with Behavior of Hardened Cement Paste interlayer between one-way valve seat and inner walls, Behavior of Hardened Cement Paste interlayer is provided with pod apertures, pod apertures connection check valve and hull outside, housing exterior walls is laid with some righting strips, and righting strip and pod apertures are disposed on housing；Described Behavior of Hardened Cement Paste interlayer exposed parts is spherical crown shape and middle part is provided with the through hole coordinated with one-way valve seat.
Preferably, described righting strip is provided with roller, and roller centrage is vertically arranged with casing centerline.
Preferably, described pod apertures centrage is at an acute angle with casing centerline angle, and pod apertures at housing outer vent towards housing internal threads one end.
Preferably, described righting strip and pod apertures are six.
Preferably, each righting strip upper roller is two.
Preferably, described inner walls is waveform with the contact surface of Behavior of Hardened Cement Paste interlayer.
Preferably, the spool material of described check valve is polyphosphazene polymer ester material.
Use and have the beneficial effects that produced by technique scheme: utilize shell one end female thread to be connected with sleeve pipe, cement mortar backflow when middle part check valve can prevent from cementing the well, hull outside righting strip can play self-centering effect, float shoe one end is that the ball coronal end of Behavior of Hardened Cement Paste interlayer plays guide effect, can improve work efficiency.The advantage that this utility model has simple in construction, brill easy to operate, high temperature resistant, easy removes, can avoid near-wall air curtain by self-centering, improve well cementation efficiency and cementing quality.
Accompanying drawing explanation
Fig. 1 is the structural representation of this utility model embodiment one；
Fig. 2 is the outline drawing of Fig. 1；
Fig. 3 is the schematic diagram of embodiment two；
In figure: 1-housing, 2-female thread, 3-check valve, 4-Behavior of Hardened Cement Paste interlayer, 5-pod apertures, 6-righting strip, 7-roller, 31-valve seat, 32-spool.
Detailed description of the invention
With detailed description of the invention, this utility model is described in further detail below in conjunction with the accompanying drawings.
Embodiment one: a kind of casing float shoe as shown in Figure 1, 2, including cylindrical shell 1, housing 1 one end is provided with the female thread 2 being connected with sleeve pipe, check valve 3 it is provided with in the middle part of housing 1, being provided with Behavior of Hardened Cement Paste interlayer 4 between check valve 3 valve seat 31 and housing 1 inwall, Behavior of Hardened Cement Paste interlayer 4 is provided with pod apertures 5, and it is outside with housing 1 that pod apertures 5 connects check valve 3, housing 1 outer wall is laid with some righting strips 6, and righting strip 6 and pod apertures 5 are disposed on housing 1；Described Behavior of Hardened Cement Paste interlayer 4 exposed parts is spherical crown shape and middle part is provided with the through hole coordinated with check valve 3 valve seat 31.
Embodiment two: as it is shown on figure 3, described righting strip 6 is provided with roller 7, roller 7 centrage is arranged with housing 1 central axis, and each righting strip 6 upper roller 7 is two, and remaining structure is with embodiment one.Roller 7 can reduce the frictional force between float shoe and shaft in wall, promotes sleeve pipe to transfer smoothly.
Above-mentioned housing 1 inwall is waveform with the contact surface of Behavior of Hardened Cement Paste interlayer 4, can improve frictional force therebetween, and Behavior of Hardened Cement Paste interlayer 4 exposed parts is spherical crown shape, play guide effect, can reduce the resistance of down tube process, guiding sleeve is transferred smoothly, improves work efficiency reduction completion period；The through hole coordinated with check valve 3 valve seat 31 it is provided with in the middle part of Behavior of Hardened Cement Paste interlayer 4；Righting strip 6 and pod apertures 5 are both designed as six；Pod apertures 5 centrage is at an acute angle with housing 1 centerlines, and pod apertures 5 can be greatly improved well cementation efficiency at housing 1 outer vent towards housing 1 female thread 2 one end, pod apertures 5 this set.The spool 32 material selection polyphosphazene polymer ester material of check valve 3, has the characteristic that brill high temperature resistant, easy removes.
During operation, this utility model one end is connected with sleeve pipe and transfers entrance pit shaft, utilize the righting strip 6 outside housing 1 to make float shoe possess Self-centering Action；When carrying out cementing job, overpressure can back down check valve 3 spool 32, and cement mortar enters casing annulus from pod apertures 5；After cementing job terminates, on check valve 3, under spring effect, inner elements of check valve 32 resets, and inner elements of check valve 32 coordinates the Guan Bi realizing check valve 3 with valve seat 31, cement mortar backflow when preventing from cementing the well.
In sum, the advantage that this utility model has simple in construction, brill easy to operate, high temperature resistant, easy removes, cement mortar backflow when check valve can prevent from cementing the well in the middle part of utilization, hull outside righting strip can play self-centering effect, is greatly improved well cementation efficiency and cementing quality.
Claims (7)
1. a casing float shoe, it is characterized in that: include cylindrical shell (1), housing (1) one end is provided with the female thread (2) being connected with sleeve pipe, housing (1) middle part is provided with check valve (3), Behavior of Hardened Cement Paste interlayer (4) it is provided with between check valve (3) valve seat (31) and housing (1) inwall, Behavior of Hardened Cement Paste interlayer (4) is provided with pod apertures (5), pod apertures (5) connection check valve (3) is outside with housing (1), housing (1) outer wall is laid with some righting strips (6), and righting strip (6) and pod apertures (5) are disposed on housing (1)；Described Behavior of Hardened Cement Paste interlayer (4) exposed parts is spherical crown shape and middle part is provided with the through hole coordinated with check valve (3) valve seat (31).
Casing float shoe the most according to claim 1, it is characterised in that: described righting strip (6) is provided with roller (7), and roller (7) centrage is arranged with housing (1) central axis.
Casing float shoe the most according to claim 1 and 2, it is characterised in that: described pod apertures (5) centrage is at an acute angle with housing (1) centerlines, and pod apertures (5) at housing (1) outer vent towards housing (1) female thread (2) one end.
Casing float shoe the most according to claim 3, it is characterised in that: described righting strip (6) and pod apertures (5) are six.
Casing float shoe the most according to claim 2, it is characterised in that: each righting strip (6) upper roller (7) is two.
Casing float shoe the most according to claim 1, it is characterised in that: described housing (1) inwall is waveform with the contact surface of Behavior of Hardened Cement Paste interlayer (4).
Casing float shoe the most according to claim 1, it is characterised in that: spool (32) material of described check valve (3) is polyphosphazene polymer ester material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620272641.7U CN205503087U (en) | 2016-04-05 | 2016-04-05 | Casing float shoe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620272641.7U CN205503087U (en) | 2016-04-05 | 2016-04-05 | Casing float shoe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205503087U true CN205503087U (en) | 2016-08-24 |
Family
ID=56734767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620272641.7U Active CN205503087U (en) | 2016-04-05 | 2016-04-05 | Casing float shoe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205503087U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113374443A (en) * | 2021-07-21 | 2021-09-10 | 濮阳三力诚信石油设备有限公司 | Self-rotating drillable reaming float shoe |
-
2016
- 2016-04-05 CN CN201620272641.7U patent/CN205503087U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113374443A (en) * | 2021-07-21 | 2021-09-10 | 濮阳三力诚信石油设备有限公司 | Self-rotating drillable reaming float shoe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |