CN103527139B - Drillable metal casing float collar float shoe device - Google Patents
Drillable metal casing float collar float shoe device Download PDFInfo
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- CN103527139B CN103527139B CN201310513068.5A CN201310513068A CN103527139B CN 103527139 B CN103527139 B CN 103527139B CN 201310513068 A CN201310513068 A CN 201310513068A CN 103527139 B CN103527139 B CN 103527139B
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- float
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- valve seat
- fixing
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Abstract
The present invention relates to a kind of drillable metal casing float collar float shoe device, it at least includes float collar housing and float shoe housing, along all there being connection screw thread on float collar float plug housing, wherein float shoe housing upper end is connected through threaded having drain lid, screw thread is all had inside and outside edge under float collar float plug housing, along by its external screw thread connection coupling under float collar float plug housing, it is characterized in that: under float collar float plug housing, have valve seat along by the connection of its female thread, threaded above valve seat have spring base, the shaft core position of spring base and valve seat all has through hole, valve rod top is plugged in the through hole of spring base shaft core position, stem lower portion is fixed with spool, spool blocks at valve seat axis through-hole, spring it is socketed with outside valve rod, spring upper end is fixing with spring base to be connected, lower spring end is fixing with spool to be connected.It can effectively prevent cement mortar from flowing backwards, and reduces well cementation accident and occurs, be three to spud in into ready simultaneously, save the engineering time, reduce drilling cost, shortens drilling period.
Description
Technical field
The present invention relates to cementing tool field, a kind of drillable metal casing float collar float shoe device in oil development well cementing operation.
Background technology
Existing well cementation float collar float plug, valve core structure the non-integral property, when being applied to big angle's well, sealing property and forward and reverse bearing capacity of spool are severely impacted, and even cause cement mortar to flow backwards, cause well cementation accident, additionally spool inner sleeve is steel structure material, PDC drill bit secondary spuds in and creeps into difficulty, and the engineering time is longer, and progress is crept in serious restriction.
Summary of the invention
It is an object of the invention to provide one can effectively prevent cement mortar from flowing backwards, and success rate is high, the drillable metal casing float collar float shoe device that drilling time is short.
The present invention solve its technical problem use technical scheme: drillable metal casing float collar float shoe device, it at least includes float collar housing and float shoe housing, along all there being connection screw thread on float collar float plug housing, wherein float shoe housing upper end is connected through threaded having drain lid, screw thread is all had inside and outside edge under float collar float plug housing, along by its external screw thread connection coupling under float collar float plug housing, it is characterized in that: under float collar float plug housing, have valve seat along by the connection of its female thread, threaded above valve seat have spring base, the shaft core position of spring base and valve seat all has through hole, valve rod top is plugged in the through hole of spring base shaft core position, stem lower portion is fixed with spool, spool blocks at valve seat axis through-hole, spring it is socketed with outside valve rod, spring upper end is fixing with spring base to be connected, lower spring end is fixing with spool to be connected.
Sealing ring also it is socketed with between described valve seat and float collar float plug housing.
In the middle part of described valve seat, outside is and the external screw thread being threadingly connected under float collar housing and the cannelure of placement sealing ring, and convex annular edge is arranged at valve seat top, and convex annular then fixes groove for annular pressure cap along inner side, and pressure cap is crimped on pressure cap and fixes in groove.
Described pressure cap upper surface and convex annular are further fixed on sealing gasket between inside side walls.
Described pressure cap is circulus, and the annular inner wall of pressure cap is the inclined-plane with closing in, and spool outer wall matches with the annular inner wall structure of pressure cap, has the fixing hole for connecting valve rod at the axle center above spool.
Described spring base is made up of base, upper spring seat and fixing bar；Wherein base is circulus, is female thread below base inner wall, and base is connected with the external screw thread of valve seat annular convex edge outer wall by its female thread；Base upper end is connected by fixing bar and upper spring seat are fixing, and upper spring seat is coaxial with ring-shaped base, and upper spring seat shaft core position has the through hole of grafting valve rod, and upper spring seat bottom is then spring fixed seat, and spring upper end is fixing with spring fixed seat to be connected.
Described base upper end is connected by three fixing bars and upper spring seat are fixing.
The invention has the beneficial effects as follows that this drillable metal casing float collar float shoe device is arranged between horizontal well casing pipe junction button, can with guide sleeves tubing string along pit shaft smoothly down to shaft bottom, in cementing operation, cement mortar enters below sleeve pipe inner seat, through hole at valve seat axle center backs down the spool above valve seat axis through-hole, sealing annular space space, during bruising after plug goes downwards to choke position, spool is descending under the back pressure and spring force effect of cement mortar blocks valve seat axis through-hole, spool bears buffer brake and closes sleeve pipe internal channel, plays unidirectional choked flow effect.Ensure annular space drilling fluid proper flow, particularly in the oil gas well cementing operation of casing programme complexity, forward and reverse bearing capacity is high, can effectively prevent cement mortar from flowing backwards, reduce well cementation accident and occur, be three to spud in into ready simultaneously, during subsequent construction, float collar, float shoe spool easily drill, save the engineering time, reduce drilling cost, shorten drilling period.
Accompanying drawing explanation
Below in conjunction with embodiment accompanying drawing, the present invention is further described.
Fig. 1 is float collar structural representation；
Fig. 2 is float shoe structural representation；
Fig. 3 is valve seat construction schematic diagram；
Fig. 4 is pressure cap structural representation；
Fig. 5 is valve core structure schematic diagram；
Fig. 6 is spring seat structure schematic diagram；
In figure: 1, float collar housing；2, float shoe housing；3, drain lid；4, box cupling；5, spring base；6, valve rod；7, spring；8, spool；9, pressure cap；10, sealing gasket；11, valve seat；12, sealing ring；13, convex annular edge；14, pressure cap fixes groove；15, base；16, upper spring seat；17, fixing bar.
Detailed description of the invention
Embodiment 1
nullIn this drillable metal casing float collar float plug, float collar structural representation is as shown in Figure 1，Float shoe structural representation is as shown in Figure 2，It at least includes float collar housing 1 and float shoe housing 2，Along all there being connection screw thread on float collar float plug housing，Wherein float shoe housing 2 upper end is connected through threaded having drain lid 3，Screw thread is all had inside and outside edge under float collar float plug housing，Along by its external screw thread connection coupling 4 under float collar float plug housing，Valve seat 11 is had along by the connection of its female thread under float collar float plug housing，Threaded above valve seat 11 have spring base 5，The shaft core position of spring base 5 and valve seat 11 all has through hole，Valve rod 6 top is plugged in the through hole of spring base 5 shaft core position，Valve rod 6 bottom is fixed with spool 8，Spool 8 blocks at valve seat 11 axis through-hole，Spring 7 it is socketed with outside valve rod 6，Spring 7 upper end is fixing with spring base 5 to be connected，Spring 7 lower end is fixing with spool 8 to be connected.
This drillable metal casing float collar float shoe device is arranged between horizontal well casing pipe junction button, can with guide sleeves tubing string along pit shaft smoothly down to shaft bottom, in cementing operation, cement mortar enters below sleeve pipe inner seat 11, through hole at valve seat 11 axle center backs down the spool 8 above valve seat 11 axis through-hole, sealing annular space space, during bruising after plug goes downwards to choke position, spool 8 is descending under the back pressure and spring 7 elastic force effect of cement mortar blocks valve seat 11 axis through-hole, spool 8 bears buffer brake and closes sleeve pipe internal channel, plays unidirectional choked flow effect.Ensure annular space drilling fluid proper flow, particularly in the oil gas well cementing operation of casing programme complexity, forward and reverse bearing capacity is high, can effectively prevent cement mortar from flowing backwards, reduce well cementation accident and occur, be three to spud in into ready simultaneously, during subsequent construction, float collar, float shoe spool easily drill, save the engineering time, reduce drilling cost, shorten drilling period.
Embodiment 2
Sealing ring 12 also it is socketed with between valve seat 11 and float collar float plug housing, junction is sealed, the structure of valve seat 11 is as shown in Figure 3, in the middle part of valve seat 11, outside is and the external screw thread being threadingly connected under float collar float plug housing and the cannelure placing sealing ring 12, there is convex annular on valve seat 11 top along 13, convex annular then fixes groove 14 for annular pressure cap along inner side, and pressure cap 9 is crimped on pressure cap and fixes in groove 14, and pressure cap 9 upper surface and convex annular are further fixed on sealing gasket 10 between inside side walls.
As shown in Figure 4, pressure cap 9 is circulus to the structure of pressure cap 9, and the annular inner wall of pressure cap 9 is the inclined-plane with closing in, and spool 8 outer wall matches with the annular inner wall structure of pressure cap 9, has the fixing hole for connecting valve rod 6, see Fig. 5 at the axle center above spool 8.
During spool 8 descending closure valve seat 11 axis through-hole, owing to spool 8 is to be contacted by inclined plane with the pressure cap 9 on valve seat 11, therefore, it is possible to preferably play plugging action, gap that may be present at closure is also sealed by sealing gasket 10 simultaneously, adds the reliability of device.
Embodiment 3
As shown in Figure 6, it is made up of the structure of spring base 5 base 15, upper spring seat 16 and fixing bar 17；Wherein base 15 is circulus, is female thread below base 15 inwall, and base 15 is connected along the external screw thread of outer wall with valve seat 11 convex annular by its female thread；Base 15 upper end is connected by fixing bar 17 is fixing with upper spring seat 16, wherein fixing bar 17 is three, upper spring seat 16 is coaxial with ring-shaped base 15, upper spring seat 16 shaft core position has the through hole of grafting valve rod 6, upper spring seat 16 bottom is then spring fixed seat, and spring 7 upper end is fixing with spring fixed seat to be connected.
Cement mortar passes through after backing down valve seat 11 above the gap entrance between 5 three fixing bars of spring base.
Parts that the present embodiment describes the most in detail and structure belong to the well-known components of the industry and common structure or conventional means, describe the most one by one.
Claims (1)
- null1. drillable metal casing float collar float shoe device，It at least includes float collar housing (1) and float shoe housing (2)，Along all there being connection screw thread on float collar float plug housing，Wherein float shoe housing (2) upper end is connected through threaded having drain lid (3)，Screw thread is all had inside and outside edge under float collar float plug housing，Along by its external screw thread connection coupling (4) under float collar float plug housing，It is characterized in that: under float collar float plug housing, have valve seat (11) along by the connection of its female thread，Valve seat (11) top is threaded spring base (5)，The shaft core position of spring base (5) and valve seat (11) all has through hole，Valve rod (6) top is plugged in the through hole of spring base (5) shaft core position，Valve rod (6) bottom is fixed with spool (8)，Spool (8) blocks at valve seat (11) axis through-hole，Spring (7) it is socketed with outside valve rod (6)，Spring (7) upper end is fixing with spring base (5) to be connected，Spring (7) lower end is fixing with spool (8) to be connected；Described spring base (5) is made up of base (15), upper spring seat (16) and fixing bar (17)；Wherein base (15) is circulus, is female thread below base (15) inwall, and base (15) is connected along the external screw thread of outer wall with valve seat (11) convex annular by its female thread；Base (15) upper end is connected by fixing bar (17) and upper spring seat (16) are fixing, upper spring seat (16) is coaxial with base (15), upper spring seat (16) shaft core position has the through hole of grafting valve rod (6), upper spring seat (16) bottom is then spring fixed seat, and spring (7) upper end is fixing with spring fixed seat to be connected；Outside described valve seat (11) middle part it is and the external screw thread being threadingly connected under float collar float plug housing and the cannelure placing sealing ring (12), convex annular edge (13) is arranged at valve seat (11) top, convex annular then fixes groove (14) for annular pressure cap along (13) inner side, and pressure cap (9) is crimped on pressure cap and fixes in groove (14)；Described pressure cap (9) is circulus, and the annular inner wall of pressure cap (9) is the inclined-plane with closing in, and spool (8) outer wall matches with the annular inner wall structure of pressure cap (9), has the fixing hole for connecting valve rod (6) at the axle center of spool (8) top；Sealing ring (12) also it is socketed with between described valve seat (11) and float collar float plug housing；Described pressure cap (9) upper surface and convex annular are further fixed on sealing gasket (10) between (13) inside side walls；Described base (15) upper end is connected by three fixing bars (17) and upper spring seat (16) are fixing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310513068.5A CN103527139B (en) | 2013-10-28 | 2013-10-28 | Drillable metal casing float collar float shoe device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310513068.5A CN103527139B (en) | 2013-10-28 | 2013-10-28 | Drillable metal casing float collar float shoe device |
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| Publication Number | Publication Date |
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| CN103527139A CN103527139A (en) | 2014-01-22 |
| CN103527139B true CN103527139B (en) | 2017-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310513068.5A Active CN103527139B (en) | 2013-10-28 | 2013-10-28 | Drillable metal casing float collar float shoe device |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107143304A (en) * | 2017-06-19 | 2017-09-08 | 中国石油集团川庆钻探工程有限公司长庆固井公司 | Anti- plug floating float collar device and cementing method |
| CN109736747B (en) * | 2019-02-13 | 2022-02-25 | 牡丹江北方油田机械有限公司 | Self-guiding choke assembly |
| CN115306348B (en) * | 2022-10-12 | 2022-12-06 | 东营市源鑫石油科技有限公司 | Self-filling type float collar float shoe for well cementation |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2713130Y (en) * | 2004-08-06 | 2005-07-27 | 张同群 | Casing float collar and float shoe |
| US20070246224A1 (en) * | 2006-04-24 | 2007-10-25 | Christiaan Krauss | Offset valve system for downhole drillable equipment |
| 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 |
| CN103032051B (en) * | 2012-12-31 | 2015-09-16 | 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 collar |
| CN203114239U (en) * | 2013-03-11 | 2013-08-07 | 盘锦泰辉实业有限公司 | Multi-functional horizontal type float collar float shoes with drilling function |
| CN203626717U (en) * | 2013-10-28 | 2014-06-04 | 中国石油集团川庆钻探工程有限公司长庆固井公司 | Drillable type casing float collar float shoe |
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| CN103527139A (en) | 2014-01-22 |
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