CN203022684U - Casing float shoe device for cementing - Google Patents
Casing float shoe device for cementing Download PDFInfo
- Publication number
- CN203022684U CN203022684U CN201220746013XU CN201220746013U CN203022684U CN 203022684 U CN203022684 U CN 203022684U CN 201220746013X U CN201220746013X U CN 201220746013XU CN 201220746013 U CN201220746013 U CN 201220746013U CN 203022684 U CN203022684 U CN 203022684U
- Authority
- CN
- China
- Prior art keywords
- float shoe
- valve seat
- float
- spool
- box cupling
- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to a casing float shoe device for cementing. The device is characterized in that the device at least comprises a float shoe shell (1), a valve seat (3), a valve plug (4) and a coupling (5), which are in excircle-shaped structures; the float shoe shell (1) has is small in diameter; the coupling (5) is big in diameter; the float shoe shell (1) is located in a bucket of the coupling (5); a hemispherical float collar shell upper cover (11) is arranged at the upper end of the float shoe shell (1); and a hole (12) is formed in the middle of the hemispherical float collar shell upper cover (11). The device has the advantages that the device has reliable sealability and wide application scope, can be suitable for drilling and cementing processes of ultradeep wells, inclined wells and horizontal wells, is a special tool for cementing and is connected between casing connection buckles; and the channel in the casing is closed by the float collar, the float shoe and the valve plug.
Description
Technical field
The utility model relates to a kind of well cementation casing float shoe device.
Background technology
This product solved the well cementation of previously used float-ball type with the nylon ball of casing float collar, float shoe in ultradeep well non-refractory, in inclined shaft, horizontal well because its action principle is to work by buoyancy and inside and outside differential pressure, and float collar, float shoe are limited by borehole condition in well can not vertical center to cause nylon ball effectively oppositely not seal to cause the phenomenon that continues to flow.This product is iron spool, high temperature resistant, oppositely sealing is float collar, the float shoe by spring action forced resetting formula, be not subjected to even horizontal well well condition restriction of large hole deviation, spool can set valve seat and seal fully, effectively solve the phenomenon that pressure release continues to flow after inclined shaft, horizontal cementing bruising, avoided staying cement plug.
The utility model content
The purpose of this utility model is to provide a kind of well cementation casing float shoe of the drilling well shaft fixing technology for ultradeep well, inclined shaft and horizontal well.
The purpose of this utility model is to realize like this, a kind of well cementation casing float shoe device, it is characterized in that: comprise at least float shoe housing, valve seat, spool, box cupling, float shoe housing, valve seat, spool, box cupling are the outer ring structure, the float shoe diameter of the housing is little, and the box cupling diameter is large, and the float shoe casing base falls within the drum of box cupling, there is hemispherical float collar case top lid float shoe housing upper end, perforate in the middle of hemispherical float collar case top lid.
Described box cupling bottom is socketed with valve seat, valve seat and box cupling seal by sealing ring, the funnel opening is arranged in the middle of valve seat, spool and valve seat are flexibly connected, the funnel opening of valve seat has flat sealed circle pressure cap and flat sealed circle from top to bottom successively, makes spool and valve base sealing, and the spool upper end is connected with connecting rod, connecting rod stretches out upper end spring base via hole, is socketed spring between spring base and funnel open upper end face.
Described flat sealed circle pressure cap and flat sealed circle inner arm and spool outer arm are the V word shape.
Described flat sealed circle pressure cap is crimped on the flat sealed circle.
The utility model has the advantages that: comprise float shoe housing, valve seat, spool, box cupling, float shoe housing, valve seat, spool, box cupling are the outer ring structure, the float shoe diameter of the housing is little, the box cupling diameter is large, the float shoe casing base falls within the drum of box cupling, the box cupling bottom is socketed with valve seat, valve seat and box cupling seal by sealing ring, it is reliable that it has sealing performance, wide accommodation in the drilling well shaft fixing technology applicable to ultradeep well, inclined shaft and horizontal well, is a kind of well cementation special tool, be connected between sleeve joint shackle, float collar, float shoe spool are closed the sleeve pipe internal channel.
Description of drawings
The utility model is described in further detail below in conjunction with the embodiment accompanying drawing:
Fig. 1 is the utility model example structure schematic diagram.
In figure, 1, the float collar housing; 2, connecting rod; 3, valve seat; 4, spool; 5, box cupling; 6, spring; 7, sealing ring; 8, flat sealed circle; 9, flat sealed circle pressure cap; 10, spring base; 11, float collar case top lid; 12, perforate.
The specific embodiment
As shown in Figure 1, a kind of well cementation casing float shoe device, at least comprise float shoe housing 1, valve seat 3, spool 4, box cupling 5, float shoe housing 1, valve seat 3, spool 4, box cupling 5 are the outer ring structure, float shoe housing 1 diameter is little, and box cupling 5 diameters are large, and float shoe housing 1 is located in the drum of box cupling 5, there is hemispherical float collar case top lid 11 float shoe housing 1 upper end, perforate 12 in the middle of hemispherical float collar case top lid 11.
Box cupling 5 bottoms are socketed with valve seat 3, valve seat 3 seals by sealing ring 7 with box cupling 5, the funnel opening is arranged in the middle of valve seat 3, spool 4 is flexibly connected with valve seat 3, the funnel opening of valve seat 3 has flat sealed circle pressure cap 9 and flat sealed circle 8 from top to bottom successively, makes spool 4 and valve seat 3 sealings, and spool 4 upper ends are connected with connecting rod 2, connecting rod 2 stretches out upper end spring base 10 via holes, socket spring 6 between spring base 10 and funnel open upper end face.
Be tightly connected in order to make to form between flat sealed circle pressure cap 9 and flat sealed circle 8 and spool 4, flat sealed circle pressure cap 9 and flat sealed circle 8 inner arms and spool 4 outer arms are the V word shape, and flat sealed circle pressure cap 9 is crimped on flat sealed circle 8.
In the setting of casing process, by well head slush balancing sleeve external and internal pressure, after having descended sleeve pipe, turn on pump circulates, pressure-acting bottom spool 4 is opened, outside cement paste blow-off pipe string, absolutely empty of sealing pipe string outer shroud is closed at back pressure and the spring force effect bottom spool of cement paste after well cementation, bear buffer brake, close the sleeve pipe internal channel.
During setting of casing, float shoe is arranged on bunch tube bottom, and float collar is arranged on the bunch tube choke position.During well cementing operation, spool is opened under the pressure-acting of liquid, and after plug went downwards to choke position, spool was got back to initial position under the effect of spring, plays unidirectional choked flow and accurately controls cement plug function of height in sleeve pipe.
The utility model mounting method:
1. float collar uses in bunch tube bottom ,-20 meters left and right, 10 meters, General Requirements interval between float collar, float shoe.
2. when entering well, float collar, the two pincers of float shoe thread requirement link closely, and guarantee bonding strength and the seal request of tool using.
3. in the setting of casing process, mud grouting in sleeve pipe continuously, the amount of pouring into of mud will conform to the sleeve pipe internal volume that enters well, prevents from causing because fluid column pressure reduction inside and outside sleeve pipe is excessive the damage of float collar, float shoe and the complexity of down-hole.
The parts that the present embodiment is not described in detail and structure belong to well-known components and common structure or the conventional means of the industry, here not narration one by one.
Claims (4)
1. well cementation casing float shoe device, it is characterized in that: comprise at least float shoe housing (1), valve seat (3), spool (4), box cupling (5), float shoe housing (1), valve seat (3), spool (4), box cupling (5) are the outer ring structure, float shoe housing (1) diameter is little, box cupling (5) diameter is large, float shoe housing (1) is located in the drum of box cupling (5), there is hemispherical float collar case top lid (11) float shoe housing (1) upper end, perforate (12) in the middle of hemispherical float collar case top lid (11).
2. a kind of well cementation casing float shoe device according to claim 1, it is characterized in that: be socketed with valve seat (3) bottom described box cupling (5), valve seat (3) seals by sealing ring (7) with box cupling (5), the funnel opening is arranged in the middle of valve seat (3), spool (4) is flexibly connected with valve seat (3), the funnel opening of valve seat (3) has flat sealed circle pressure cap (9) and flat sealed circle (8) from top to bottom successively, make spool (4) and valve seat (3) sealing, spool (4) upper end is connected with connecting rod, connecting rod stretches out upper end spring base (10) via hole, be socketed spring (6) between spring base (10) and funnel open upper end face.
3. a kind of well cementation casing float shoe device according to claim 2, it is characterized in that: described flat sealed circle pressure cap (9) and flat sealed circle (8) inner arm and spool (4) outer arm are the V word shape.
4. a kind of well cementation casing float shoe device according to claim 2, it is characterized in that: described flat sealed circle pressure cap (9) is crimped on flat sealed circle (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220746013XU CN203022684U (en) | 2012-12-31 | 2012-12-31 | Casing float shoe device for cementing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220746013XU CN203022684U (en) | 2012-12-31 | 2012-12-31 | Casing float shoe device for cementing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203022684U true CN203022684U (en) | 2013-06-26 |
Family
ID=48646675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220746013XU Expired - Fee Related CN203022684U (en) | 2012-12-31 | 2012-12-31 | Casing float shoe device for cementing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203022684U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103061706A (en) * | 2012-12-31 | 2013-04-24 | 中国石油集团川庆钻探工程有限公司长庆固井公司 | Casing float shoe for well cementation |
-
2012
- 2012-12-31 CN CN201220746013XU patent/CN203022684U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103061706A (en) * | 2012-12-31 | 2013-04-24 | 中国石油集团川庆钻探工程有限公司长庆固井公司 | Casing float shoe for well cementation |
| CN103061706B (en) * | 2012-12-31 | 2016-04-20 | 中国石油集团川庆钻探工程有限公司长庆固井公司 | A kind of well cementation casing float shoe |
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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: 20130626 Termination date: 20171231 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |