CN203626717U - Drillable type casing float collar float shoe - Google Patents
Drillable type casing float collar float shoe Download PDFInfo
- Publication number
- CN203626717U CN203626717U CN201320665171.7U CN201320665171U CN203626717U CN 203626717 U CN203626717 U CN 203626717U CN 201320665171 U CN201320665171 U CN 201320665171U CN 203626717 U CN203626717 U CN 203626717U
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- China
- Prior art keywords
- float
- spring
- base
- float collar
- shell body
- 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 - Lifetime
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- 230000008878 coupling Effects 0.000 claims abstract description 4
- 238000010168 coupling process Methods 0.000 claims abstract description 4
- 238000005859 coupling reaction Methods 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 15
- 239000002184 metal Substances 0.000 claims description 14
- 239000004568 cement Substances 0.000 abstract description 10
- 238000005553 drilling Methods 0.000 abstract description 10
- 238000010276 construction Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 208000034656 Contusions Diseases 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Abstract
The utility model relates to a drillable type casing float collar float shoe. The drillable type casing float collar float shoe at least comprises a float collar shell body and a float shoe shell body, connecting threads are arranged on the upper edge of the float collar shell body and the upper edge of the float shoe shell body, the upper end of the float shoe shell body is connected with a drainage cover through the connecting threads of the float shoe shell body, threads are arranged on the inner side and the outer side of the lower edge of the float collar shell body and the inner side and the outer side of the lower edge of the float shoe shell body, and the lower edge of the float collar shell body and the lower edge of the float shoe shell body are connected with a coupling through the external threads. The drillable type casing float collar float shoe is characterized in that the lower edge of the he float collar shell body and the lower edge of the float shoe shell body are connected with a valve base through the internal threads, the upper portion of the vale base is in threaded connection with a spring base, through holes are formed in the axis of the spring base and the axis of the valve base, the upper portion of a valve rod is inserted in the through hole in the axis of the spring base, a valve element is fixed to the lower portion of the valve rod, the valve element is blocked in the through hole of the axis of the valve base, a spring is connected with the valve rod in a sleeved mode, the upper end of the spring is fixedly connected with the spring base, and the lower end of the spring is fixedly connected with the valve element. The drillable type casing float collar float shoe can effectively prevent cement paste from flowing backwards and reduce well cementation accidents, meanwhile prepares for third-opening drilling, saves construction time, reduces well drilling cost and shortens the well drilling period.
Description
Technical field
The utility model relates to cementing tool field, particularly a kind of drillable metal casing float collar float plug for oil development well cementing operation.
Background technology
Existing well cementation float collar float plug, valve core structure the non-integral property, in the time being applied to large angle of inclination horizontal well, the sealing performance of spool and forward and reverse bearing capacity are had a strong impact on, and even cause that cement paste flows backwards, and causes well cementation accident, spool inner sleeve is steel structure material in addition, 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
The purpose of this utility model is to provide one can effectively prevent that cement paste from flowing backwards, and success rate is high, the drillable metal casing float collar float plug that drilling time is short.
The utility model solves the technical scheme that its technical problem adopts: drillable metal casing float collar float plug, which comprises at least float collar housing and float shoe housing, on float collar float plug housing, all there is connecting thread on edge, wherein float shoe housing upper end is connected with drainage lid by its connecting thread, under float collar float plug housing, all there is screw thread along inside and outside both sides, under float collar float plug housing, edge is by its external screw thread connection coupling, it is characterized in that: under float collar float plug housing, edge is connected with valve seat by its internal thread, spring base has been threaded above valve seat, 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 shutoff is at valve seat axis through-hole place, valve rod is socketed with spring outward, spring upper end is fixedly connected with spring base, spring lower end is fixedly connected with spool.
Between described valve seat and float collar float plug housing, be also socketed with sealing ring.
Described outside, valve seat middle part is the external screw thread being threaded with edge under float collar housing and the cannelure of placing sealing ring, and convex annular edge is arranged at valve seat top, and convex annular is annular pressure cap holddown groove along inner side, and pressure cap is crimped in pressure cap holddown groove.
Described pressure cap upper surface and convex annular are along being also fixed with sealing mat 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 the annular inner wall structure of spool outer wall and pressure cap matches, and the axle center place of spool top has the fixing hole for connecting valve rod.
Described spring base is made up of base, upper spring seat and fixed bar; Wherein base is circulus, and base inner wall below is internal thread, and base is connected with the external screw thread of valve seat annular convex edge outer wall by its internal thread; Base upper end is fixedly connected with upper spring seat by fixed bar, 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 spring fixed seat, and spring upper end is fixedly connected with spring fixed seat.
Described base upper end is fixedly connected with upper spring seat by three fixed bars.
The beneficial effects of the utility model are that this drillable metal casing float collar float plug is arranged between horizontal well casing pipe junction button, can guide sleeves tubing string along pit shaft smoothly down to shaft bottom, in cementing operation, cement paste enters valve seat below in sleeve pipe, back down the spool of valve seat axis through-hole top through the through hole at valve seat axle center place, sealing annular space space, when bruising when plug goes downwards to after choke position, spool is the descending valve seat axis through-hole that blocks under the back pressure of cement paste and spring force effect, spool bears buffer brake and closes sleeve pipe internal channel, plays unidirectional choked flow effect.Guarantee 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 that cement paste from flowing backwards, reduce well cementation accident and occur, be three to spud in into ready simultaneously, when follow-up 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 utility model is further illustrated.
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, drainage lid; 4, box cupling; 5, spring base; 6, valve rod; 7, spring; 8, spool; 9, pressure cap; 10, sealing mat; 11, valve seat; 12, sealing ring; 13, convex annular edge; 14, pressure cap holddown groove; 15, base; 16, upper spring seat; 17, fixed bar.
The specific embodiment
In this drillable metal casing float collar float plug, float collar structural representation as shown in Figure 1, float shoe structural representation as shown in Figure 2, which comprises at least float collar housing 1 and float shoe housing 2, on float collar float plug housing, all there is connecting thread on edge, wherein float shoe housing 2 upper ends are connected with drainage lid 3 by its connecting thread, under float collar float plug housing, all there is screw thread along inside and outside both sides, under float collar float plug housing, edge is by its external screw thread connection coupling 4, under float collar float plug housing, edge is connected with valve seat 11 by its internal thread, the valve seat 11 tops spring base 5 that has been threaded, the shaft core position of spring base 5 and valve seat 11 all has through hole, valve rod 6 tops are plugged in the through hole of spring base 5 shaft core positions, valve rod 6 bottoms are fixed with spool 8, spool 8 shutoff are at valve seat 11 axis through-hole places, the outer spring 7 that is socketed with of valve rod 6, spring 7 upper ends are fixedly connected with spring base 5, spring 7 lower ends are fixedly connected with spool 8.
This drillable metal casing float collar float plug is arranged between horizontal well casing pipe junction button, can guide sleeves tubing string along pit shaft smoothly down to shaft bottom, in cementing operation, cement paste enters valve seat 11 belows in sleeve pipe, back down the spool 8 of valve seat 11 axis through-hole tops through the through hole at valve seat 11 axle center places, sealing annular space space, when bruising when plug goes downwards to after choke position, spool 8 is descending valve seat 11 axis through-holes that block under the back pressure of cement paste and spring 7 elastic force effects, spool 8 bears buffer brake and closes sleeve pipe internal channel, plays unidirectional choked flow effect.Guarantee 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 that cement paste from flowing backwards, reduce well cementation accident and occur, be three to spud in into ready simultaneously, when follow-up construction, float collar, float shoe spool easily drill, save the engineering time, reduce drilling cost, shorten drilling period.
Between valve seat 11 and float collar float plug housing, be also socketed with sealing ring 12, junction is sealed, the structure of valve seat 11 as shown in Figure 3, valve seat 11 outsides, middle part are and the cannelure along the external screw thread being threaded and placement sealing ring 12 under float collar float plug housing, there is convex annular on valve seat 11 tops along 13, convex annular is annular pressure cap holddown groove 14 along inner side, and pressure cap 9 is crimped in pressure cap holddown groove 14, and pressure cap 9 upper surfaces and convex annular are along being also fixed with sealing mat 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 the annular inner wall structure of spool 8 outer walls and pressure cap 9 matches, and the axle center place of spool 8 tops has the fixing hole for connecting valve rod 6, sees Fig. 5.
In the descending shutoff valve seat 11 axis through-hole processes of spool 8, because spool 8 is to contact by inclined plane with the pressure cap 9 on valve seat 11, therefore can better play plugging action, the gap that sealing mat 10 also may exist shutoff place simultaneously seals, and has increased the reliability of device.
As shown in Figure 6, it is made up of base 15, upper spring seat 16 and fixed bar 17 structure of spring base 5; Wherein base 15 is circulus, and base 15 inwall belows are internal thread, and base 15 is connected along the external screw thread of outer wall with valve seat 11 convex annular by its internal thread; Base 15 upper ends are fixedly connected with upper spring seat 16 by fixed bar 17, wherein fixed bar 17 is three, upper spring seat 16 is coaxial with ring-shaped base 15, upper spring seat 16 shaft core positions have the through hole of grafting valve rod 6, upper spring seat 16 bottoms are spring fixed seat, and spring 7 upper ends are fixedly connected with spring fixed seat.
Cement paste enters top by the gap between 5 three fixed bars of spring base after backing down valve seat 11.
The parts that the present embodiment does not describe 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 (7)
1. drillable metal casing float collar float plug, which comprises at least float collar housing (1) and float shoe housing (2), on float collar float plug housing, all there is connecting thread on edge, wherein float shoe housing (2) upper end is connected with drainage lid (3) by its connecting thread, under float collar float plug housing, all there is screw thread along inside and outside both sides, under float collar float plug housing, edge is by its external screw thread connection coupling (4), it is characterized in that: under float collar float plug housing, edge is connected with valve seat (11) by its internal thread, spring base (5) has been threaded above valve seat (11), 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) shutoff is at valve seat (11) axis through-hole place, the outer spring (7) that is socketed with of valve rod (6), spring (7) upper end is fixedly connected with spring base (5), spring (7) lower end is fixedly connected with spool (8).
2. drillable metal casing float collar float plug according to claim 1, is characterized in that: between described valve seat (11) and float collar float plug housing, be also socketed with sealing ring (12).
3. drillable metal casing float collar float plug according to claim 1, it is characterized in that: described outside, valve seat (11) middle part is the external screw thread being threaded with the lower edge of float collar housing (1) and the cannelure of placing sealing ring (12), there is convex annular on valve seat (11) top along (13), convex annular is annular pressure cap holddown groove (14) along (13) inner side, and pressure cap (9) is crimped in pressure cap holddown groove (14).
4. drillable metal casing float collar float plug according to claim 3, is characterized in that: described pressure cap (9) upper surface and convex annular are also fixed with sealing mat (10) along between (13) inside side walls.
5. drillable metal casing float collar float plug according to claim 3, it is characterized in that: described pressure cap (9) is circulus, the annular inner wall of pressure cap (9) is the inclined-plane with closing in, the annular inner wall structure of spool (8) outer wall and pressure cap (9) matches, and the axle center place of spool (8) top has the fixing hole for connecting valve rod (6).
6. drillable metal casing float collar float plug according to claim 1, is characterized in that: described spring base (5) is made up of base (15), upper spring seat (16) and fixed bar (17); Wherein base (15) is circulus, and base (15) inwall below is internal thread, and base (15) is connected along the external screw thread of outer wall with valve seat (11) convex annular by its internal thread; Base (15) upper end is fixedly connected with upper spring seat (16) by fixed bar (17), 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 spring fixed seat, and spring (7) upper end is fixedly connected with spring fixed seat.
7. drillable metal casing float collar float plug according to claim 6, is characterized in that: described base (15) upper end is fixedly connected with upper spring seat (16) by three fixed bars (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320665171.7U CN203626717U (en) | 2013-10-28 | 2013-10-28 | Drillable type casing float collar float shoe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320665171.7U CN203626717U (en) | 2013-10-28 | 2013-10-28 | Drillable type casing float collar float shoe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203626717U true CN203626717U (en) | 2014-06-04 |
Family
ID=50813206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320665171.7U Expired - Lifetime CN203626717U (en) | 2013-10-28 | 2013-10-28 | Drillable type casing float collar float shoe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203626717U (en) |
Cited By (2)
| 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 |
| CN113216897A (en) * | 2021-05-27 | 2021-08-06 | 刘峰铄 | Float collar float shoe for well cementation construction |
-
2013
- 2013-10-28 CN CN201320665171.7U patent/CN203626717U/en not_active Expired - Lifetime
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 |
| CN113216897A (en) * | 2021-05-27 | 2021-08-06 | 刘峰铄 | Float collar float shoe for well cementation construction |
| CN113216897B (en) * | 2021-05-27 | 2022-07-08 | 大庆市天德忠石油科技有限公司 | Float collar float shoe for well cementation construction |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140604 |
|
| CX01 | Expiry of patent term |