CN103032051A - Casing float collar for well cementation - Google Patents
Casing float collar for well cementation Download PDFInfo
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- CN103032051A CN103032051A CN2012105901113A CN201210590111A CN103032051A CN 103032051 A CN103032051 A CN 103032051A CN 2012105901113 A CN2012105901113 A CN 2012105901113A CN 201210590111 A CN201210590111 A CN 201210590111A CN 103032051 A CN103032051 A CN 103032051A
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- valve seat
- float collar
- spool
- casing
- coupling
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Abstract
The invention relates to a casing float collar for well cementation. The casing float collar is characterized by at least comprising a float collar shell, a valve seat, a valve core and a coupling, wherein the float collar shell, the valve seat, the valve core and the coupling are of outer circular structures; the float collar shell has a small diameter; the coupling has a large diameter; the float collar shell is positioned in a drum of the coupling; the valve seat is sleeved on the bottom of the coupling; the valve seat and the coupling are sealed through a seal ring; a funnel opening is formed in the middle of the valve seat; the valve core is movably connected with the valve seat; the funnel opening of the valve seat is provided with a flat seal ring pressing cap and a flat seal ring from top to bottom in sequence, so that the valve core is sealed with the valve seat; the upper end of the valve core is connected with a connecting rod; the connecting rod extends out of an upper spring seat via hole; and a spring is sleeved between a spring seat and the upper end face of the funnel opening. The casing float collar for well cementation has the advantages of reliable sealing property, wide application range and capability of being suitable for well drilling and cementing processes of ultra-deep wells, inclined wells and horizontal wells, is a tool special for well cementation and is connected between casing connecting buckles; and a passage in the casing is closed by the float collar and a float shoe valve core.
Description
Technical field
The present invention relates to a kind of well cementation casing float collar.
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 large hole deviation even horizontal well well condition restriction, spool can set valve seat and seal fully, effectively solve the phenomenon that pressure release continues to flow after inclined shaft, the horizontal cementing bruising, avoided staying cement plug.
Summary of the invention
The well cementation casing float collar that the purpose of this invention is to provide a kind of drilling well shaft fixing technology for ultradeep well, inclined shaft and horizontal well.
The object of the present invention is achieved like this, a kind of well cementation casing float collar, it is characterized in that: comprise at least the float collar housing, valve seat, spool, box cupling, the float collar housing, valve seat, spool, box cupling is the outer ring structure, the float collar diameter of the housing is little, the box cupling diameter is large, the float collar 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, the funnel opening is arranged in the middle of the valve seat, and spool and valve seat are flexibly connected, and the funnel opening of valve seat has flat sealed circle pressure cap and flat sealed circle from top to bottom successively, make spool and valve base sealing, the spool upper end is connected with connecting rod, and 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.
Advantage of the present invention is: a kind of well cementation casing float collar, it is characterized in that: comprise at least the float collar housing, valve seat, spool, box cupling, the float collar housing, valve seat, spool, box cupling is the outer ring structure, the float collar diameter of the housing is little, the box cupling diameter is large, the float collar 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, and it is reliable that it has sealing performance, wide accommodation, applicable to ultradeep well, in the drilling well shaft fixing technology of inclined shaft and horizontal well, be a kind of well cementation special tool, be connected between the sleeve joint shackle float collar, the float shoe spool is closed the sleeve pipe internal channel.
Description of drawings
The invention will be further described below in conjunction with the embodiment accompanying drawing:
Fig. 1 is embodiment of the invention structural representation.
Among the 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.
The specific embodiment
As shown in Figure 1, a kind of well cementation casing float collar, at least comprise float collar housing 1, valve seat 3, spool 4, box cupling 5, float collar housing 1, valve seat 3, spool 4, box cupling 5 is the outer ring structure, float collar housing 1 diameter is little, box cupling 5 diameters are large, float collar housing 1 is located in the drum of box cupling 5, 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 the valve seat 3, and spool 4 is flexibly connected with valve seat 3, and 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 sealings, spool 4 upper ends are connected with connecting rod 2, and 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 the 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 the flat sealed circle 8.
In the setting of casing process, by well head slush balancing sleeve external and internal pressure, turn on pump circulates after having descended sleeve pipe, pressure-acting bottom spool 4 is opened, outside the 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 the well cementation, bear buffer brake, close the sleeve pipe internal channel.
During setting of casing, float shoe is installed in bunch tube bottom, and float collar is installed in 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 the sleeve pipe.
Mounting method of the present invention:
1. float collar uses in the bunch tube bottom, and the General Requirements interval is about 10 meters-20 meters between float collar, the float shoe.
2. float collar, the two pincers of float shoe thread requirement link closely when entering well, guarantee bonding strength and the seal request of tool using.
3. in the setting of casing process, continuous mud grouting in sleeve pipe, 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 the sleeve pipe is excessive the damage of float collar, float shoe and the complexity of down-hole.
The parts that 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 one by one narration.
Claims (3)
1. well cementation casing float collar, it is characterized in that: comprise at least float collar housing (1), valve seat (3), spool (4), box cupling (5), float collar housing (1), valve seat (3), spool (4), box cupling (5) is the outer ring structure, float collar housing (1) diameter is little, box cupling (5) diameter is large, float collar housing (1) is located in the drum of box cupling (5), box cupling (5) bottom is 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 the 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, is socketed spring (6) between spring base (10) and funnel open upper end face.
2. a kind of well cementation casing float collar according to claim 1, 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.
3. a kind of well cementation casing float collar according to claim 1, it is characterized in that: described flat sealed circle pressure cap (9) is crimped on the flat sealed circle (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210590111.3A CN103032051B (en) | 2012-12-31 | 2012-12-31 | A kind of well cementation casing float collar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210590111.3A CN103032051B (en) | 2012-12-31 | 2012-12-31 | A kind of well cementation casing float collar |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103032051A true CN103032051A (en) | 2013-04-10 |
| CN103032051B CN103032051B (en) | 2015-09-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210590111.3A Active CN103032051B (en) | 2012-12-31 | 2012-12-31 | A kind of well cementation casing float collar |
Country Status (1)
| Country | Link |
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| CN (1) | CN103032051B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103527139A (en) * | 2013-10-28 | 2014-01-22 | 中国石油集团川庆钻探工程有限公司长庆固井公司 | Drillable casing pipe float collar float shoe device |
| CN105239958A (en) * | 2015-10-29 | 2016-01-13 | 中国石油集团渤海钻探工程有限公司 | Novel bumping-and-pressing-type float collar |
| CN112983348A (en) * | 2021-04-30 | 2021-06-18 | 纬达石油装备有限公司 | Floating hoop and floating shoe and using method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4687019A (en) * | 1985-11-18 | 1987-08-18 | Mayfield Windel O | Float valve assembly |
| CN2713130Y (en) * | 2004-08-06 | 2005-07-27 | 张同群 | Casing float collar and float shoe |
| CN201507273U (en) * | 2009-10-23 | 2010-06-16 | 扬州市驰城石油机械有限公司 | Kelly bar splash valve |
| CN102628346A (en) * | 2012-05-09 | 2012-08-08 | 常熟市石油固井工具有限公司 | Self-filling type flow velocity-regulable float collar-float shoe device |
| CN203022685U (en) * | 2012-12-31 | 2013-06-26 | 中国石油集团川庆钻探工程有限公司长庆固井公司 | Casing float collar device for cementing |
-
2012
- 2012-12-31 CN CN201210590111.3A patent/CN103032051B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4687019A (en) * | 1985-11-18 | 1987-08-18 | Mayfield Windel O | Float valve assembly |
| CN2713130Y (en) * | 2004-08-06 | 2005-07-27 | 张同群 | Casing float collar and float shoe |
| CN201507273U (en) * | 2009-10-23 | 2010-06-16 | 扬州市驰城石油机械有限公司 | Kelly bar splash valve |
| CN102628346A (en) * | 2012-05-09 | 2012-08-08 | 常熟市石油固井工具有限公司 | Self-filling type flow velocity-regulable float collar-float shoe device |
| CN203022685U (en) * | 2012-12-31 | 2013-06-26 | 中国石油集团川庆钻探工程有限公司长庆固井公司 | Casing float collar device for cementing |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103527139A (en) * | 2013-10-28 | 2014-01-22 | 中国石油集团川庆钻探工程有限公司长庆固井公司 | Drillable casing pipe float collar float shoe device |
| CN105239958A (en) * | 2015-10-29 | 2016-01-13 | 中国石油集团渤海钻探工程有限公司 | Novel bumping-and-pressing-type float collar |
| CN105239958B (en) * | 2015-10-29 | 2017-07-18 | 中国石油集团渤海钻探工程有限公司 | A kind of new impact pressing floating hoop |
| CN112983348A (en) * | 2021-04-30 | 2021-06-18 | 纬达石油装备有限公司 | Floating hoop and floating shoe and using method thereof |
| CN112983348B (en) * | 2021-04-30 | 2021-07-23 | 纬达石油装备有限公司 | Floating hoop and floating shoe and using method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103032051B (en) | 2015-09-16 |
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