CN103061706A - Casing float shoe for well cementation - Google Patents
Casing float shoe for well cementation Download PDFInfo
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- CN103061706A CN103061706A CN2012105912103A CN201210591210A CN103061706A CN 103061706 A CN103061706 A CN 103061706A CN 2012105912103 A CN2012105912103 A CN 2012105912103A CN 201210591210 A CN201210591210 A CN 201210591210A CN 103061706 A CN103061706 A CN 103061706A
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- float shoe
- valve seat
- float
- casing
- spool
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Abstract
The invention relates to a casing float shoe for well cementation. The casing float shoe is characterized by at least comprising a float shoe body (1), a valve seat (3), a valve core (4) and a coupling (5) which are of cylindrical structure. The float shoe casing (1) is small in diameter, the coupling (5) is large in diameter, the float shoe casing (1) is located in a round bucket of the coupling (5), a hemispherical float coupling casing upper cover (11) is arranged at the upper end of the float shoe casing (1), and a hole (12) is arranged in the middle of the hemispherical float coupling casing upper cover (11). The casing float shoe is reliable in sealing performance, wide in suitable range and capable of being suitable for drilling well cementation process of bores, inclined wells and horizontal wells, is a special tool for fixing the wells, and is connected between casing connection fasteners. A float coupling and a float shoe valve core close a casing inner channel.
Description
Technical field
The present invention relates to a kind of well cementation casing float shoe.
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 shoe 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 shoe, 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 the 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 the 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.
Advantage of the present invention is: 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 the sleeve joint shackle, float collar, float shoe spool are 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; 11, float collar case top lid; 12, perforate.
The specific embodiment
As shown in Figure 1, a kind of well cementation casing float shoe, 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 the 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 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, 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 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 (4)
1. well cementation casing float shoe, 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 the hemispherical float collar case top lid (11).
2. a kind of well cementation casing float shoe according to claim 1, it is characterized in that: described 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.
3. a kind of well cementation casing float shoe 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 according to claim 2, 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 |
|---|---|---|---|
| CN201210591210.3A CN103061706B (en) | 2012-12-31 | 2012-12-31 | A kind of well cementation casing float shoe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210591210.3A CN103061706B (en) | 2012-12-31 | 2012-12-31 | A kind of well cementation casing float shoe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103061706A true CN103061706A (en) | 2013-04-24 |
| CN103061706B CN103061706B (en) | 2016-04-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210591210.3A Active CN103061706B (en) | 2012-12-31 | 2012-12-31 | A kind of well cementation casing float shoe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103061706B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110357563A (en) * | 2019-07-04 | 2019-10-22 | 四川达灿石油设备有限公司 | A kind of cementing operation cement base float collar float plug |
| CN111426497A (en) * | 2020-04-05 | 2020-07-17 | 新疆正通石油天然气股份有限公司 | Casing buckling evaluation method in inclined shaft well cementation process |
| CN115898327A (en) * | 2023-03-01 | 2023-04-04 | 山东健源石油工程技术有限公司 | Rotary self-guiding type float shoe for horizontal well |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995025874A1 (en) * | 1994-03-18 | 1995-09-28 | Weatherford U.S., Inc. | Valve for use in float equipment |
| US20040118560A1 (en) * | 2002-12-18 | 2004-06-24 | Johnson Michael R. | Apparatus and method for drilling a wellbore with casing and cementing the casing in the wellbore |
| CN2713130Y (en) * | 2004-08-06 | 2005-07-27 | 张同群 | Casing float collar and float shoe |
| CN201024980Y (en) * | 2007-04-29 | 2008-02-20 | 大庆石油管理局 | An oil field well fixing and self irrigation collision assembly |
| CN201074499Y (en) * | 2007-07-04 | 2008-06-18 | 中国石油天然气股份有限公司 | Float shoe for bare eye expansion system |
| CN201090174Y (en) * | 2007-10-17 | 2008-07-23 | 吉林石油集团有限责任公司 | Steel body sealing float collar and float shoe for oil field well-cementing |
| CN203022684U (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 shoe device for cementing |
-
2012
- 2012-12-31 CN CN201210591210.3A patent/CN103061706B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995025874A1 (en) * | 1994-03-18 | 1995-09-28 | Weatherford U.S., Inc. | Valve for use in float equipment |
| US20040118560A1 (en) * | 2002-12-18 | 2004-06-24 | Johnson Michael R. | Apparatus and method for drilling a wellbore with casing and cementing the casing in the wellbore |
| CN2713130Y (en) * | 2004-08-06 | 2005-07-27 | 张同群 | Casing float collar and float shoe |
| CN201024980Y (en) * | 2007-04-29 | 2008-02-20 | 大庆石油管理局 | An oil field well fixing and self irrigation collision assembly |
| CN201074499Y (en) * | 2007-07-04 | 2008-06-18 | 中国石油天然气股份有限公司 | Float shoe for bare eye expansion system |
| CN201090174Y (en) * | 2007-10-17 | 2008-07-23 | 吉林石油集团有限责任公司 | Steel body sealing float collar and float shoe for oil field well-cementing |
| CN203022684U (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 shoe device for cementing |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110357563A (en) * | 2019-07-04 | 2019-10-22 | 四川达灿石油设备有限公司 | A kind of cementing operation cement base float collar float plug |
| CN111426497A (en) * | 2020-04-05 | 2020-07-17 | 新疆正通石油天然气股份有限公司 | Casing buckling evaluation method in inclined shaft well cementation process |
| CN111426497B (en) * | 2020-04-05 | 2021-04-30 | 新疆正通石油天然气股份有限公司 | Casing buckling evaluation method in inclined shaft well cementation process |
| CN115898327A (en) * | 2023-03-01 | 2023-04-04 | 山东健源石油工程技术有限公司 | Rotary self-guiding type float shoe for horizontal well |
| CN115898327B (en) * | 2023-03-01 | 2023-05-02 | 山东健源石油工程技术有限公司 | Rotary self-guiding type floating shoe for horizontal well |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103061706B (en) | 2016-04-20 |
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