CN202990958U - Outer packer for casing pipe - Google Patents
Outer packer for casing pipe Download PDFInfo
- Publication number
- CN202990958U CN202990958U CN201220688981XU CN201220688981U CN202990958U CN 202990958 U CN202990958 U CN 202990958U CN 201220688981X U CN201220688981X U CN 201220688981XU CN 201220688981 U CN201220688981 U CN 201220688981U CN 202990958 U CN202990958 U CN 202990958U
- Authority
- CN
- China
- Prior art keywords
- hole
- blind hole
- side direction
- valve
- axial hole
- 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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Abstract
The utility model discloses an outer packer for a casing pipe and relates to a packer for a plugging oil-water well, in particular to the outer packer for the casing pipe. The outer packer comprises an upper connector, a central pipe, a lower connector, a rubber barrel component and a valve connector, wherein the upper connector is connected with the upper end of the central pipe; the outside of the central pipe is sleeved with the rubber barrel component; the lower part of the rubber barrel component is connected with the upper part of the valve connector; the lower part of the valve connector is connected with the lower connector; an upper lateral blind hole and a lower lateral blind hole are formed in the valve connector; the upper lateral blind hole is adjacent to the lower lateral blind hole; a first axial hole, a second axial hole and a third axial hole are formed in the valve connector; a radial through-hole is formed in one side of the lower lateral blind hole; a pressure-limiting valve is mounted in the upper lateral blind hole; and a check valve is mounted in the lower lateral blind hole. According to the outer packer for the casing pipe, the structure is simple, the work is reliable, a broken plug can effectively seal a liquid inlet channel in a pipe column downgoing process, and the check valve can be prevented from being opened in advance.
Description
Technical field
The utility model relates to the packer that the oil-water well shutoff is used, and is specially a kind of external casing packer.
Background technology
The inflatable packer that oil-field flooding is used is in the packing element internal pressure during higher than the packing element external pressure, packing element expands outwardly, and realizes the sealing oil casing annular space.
Existing external casing packer complex structure, and disconnected plug sealing load is low, is difficult to guarantee sealing.
Summary of the invention
The purpose of this utility model is to provide a kind of simple in structure, sealing effectiveness external casing packer preferably.
The technical scheme that realizes above-mentioned purpose is: a kind of external casing packer, it is characterized in that: comprise top connection, central tube, lower contact, packing element assembly and valve union, top connection is connected with the upper end of central tube, the packing element assembly is sleeved on outside central tube, the bottom of packing element assembly is connected with the top of valve union, and the bottom of valve union is connected with lower contact; Have side direction blind hole and lower side direction blind hole on described valve union, upper side direction blind hole is adjacent with lower side direction blind hole, also have the first axial hole, the second axial hole and the 3rd axial hole on described valve union, one end of described the first axial hole and the second axial hole is communicated with the valve union upper end, the other end of the first axial hole and the second axial hole is communicated with upper side direction blind hole, the 3rd axial hole one end passes lower side direction blind hole and is communicated with upper side direction blind hole, the other end of the 3rd axial hole is communicated with the valve union lower surface, the end sealing that described the 3rd axial hole is communicated with the valve union lower surface; A side in lower side direction blind hole is provided with radial direction through hole, and described radial direction through hole is communicated with the sealed end of lower side direction blind hole, the external port sealing of described radial direction through hole; The in-built limited valve of described upper side direction blind hole, fill the first sealing ring on pressure limiting valve, the first axial hole is arranged at the inner one side of side direction blind hole, described the second axial hole and the 3rd axial hole are arranged at the middle part of side direction blind hole, the middle part of described pressure limiting valve is provided with cannelure, make between the second axial hole and the 3rd axial hole to be connected, the outer end of described pressure limiting valve cuts off by first and is fixed in upper side direction blind hole, and the outer end of upper side direction blind hole is provided with the first pressure cap; Be provided with one way valve in described lower side direction blind hole, described the 3rd axial hole is placed in the inboard of lower side direction blind hole, the inner periphery of described one way valve is provided with the second sealing ring, the outer end of described one way valve is set with spring, the outer end of described one way valve cuts off by second and is fixed in lower side direction blind hole, and the outer end of lower side direction blind hole is provided with the second pressure cap; Be provided with joint ring in described valve union, disconnected plug is installed on joint ring, described disconnected plug is provided with sealing ring with the inner port sealing of radial direction through hole between joint ring and slug.
Compared with prior art, the utility model is simple in structure, reliable operation, and in the lower tubular column process, disconnected plug can effective sealing inlet opening passage, prevents that one way valve from opening in advance.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 be in Fig. 1 A-A to sectional view;
Fig. 3 be in Fig. 1 B-B to sectional view.
The specific embodiment
As shown in Figure 1, the utility model comprises top connection 1, central tube 2, lower contact 3, packing element assembly 4 and valve union 5, top connection 1 is connected with the upper end of central tube 2, packing element assembly 4 is sleeved on outside central tube 2, the bottom of packing element assembly 4 is threaded with the top of valve union 5, the lower end of central tube 2 is threaded with valve union 5 upper ends, and the bottom of valve union 5 is connected with lower contact 3.
Have side direction blind hole 6 and lower side direction blind hole 7 on described valve union 5, upper side direction blind hole 6 is adjacent with lower side direction blind hole 7; Also have the first axial hole 8, the second axial hole 9 and the 3rd axial hole 10 on described valve union 5, one end of described the first axial hole 8 and the second axial hole 9 is communicated with valve union 5 upper ends, the other end of the first axial hole 8 and the second axial hole 9 is communicated with upper side direction blind hole 6, the 3rd axial hole 10 1 ends pass lower side direction blind hole 7 and are communicated with upper side direction blind hole 6, the other end of the 3rd axial hole 10 is communicated with valve union 5 lower surfaces, the end sealing that described the 3rd axial hole 10 is communicated with valve union 5 lower surfaces; A side in lower side direction blind hole 7 is provided with radial direction through hole 11, and described radial direction through hole 11 is communicated with the sealed end of lower side direction blind hole 7, the external port sealing of described radial direction through hole 11.
The in-built limited valve 12 of upper side direction blind hole 6, the first sealing ring 13 is housed on pressure limiting valve 12, the first axial hole 8 is arranged at the inner one side of side direction blind hole 6, described the second axial hole 9 and the 3rd axial hole 10 are arranged at the middle part of side direction blind hole 6, the middle part of described pressure limiting valve 12 is provided with cannelure 14, make between the second axial hole 9 and the 3rd axial hole 10 to be connected, the outer end of described pressure limiting valve 12 cuts off 15 by first and is fixed in upper side direction blind hole 6, and the outer end of upper side direction blind hole 6 is provided with the first pressure cap 16.
Be provided with one way valve 17 in described lower side direction blind hole 7, the 3rd axial hole 10 is placed in the inboard of lower side direction blind hole 7, the inner periphery of described one way valve 17 is provided with the second sealing ring 18, the outer end of described one way valve 17 is set with spring 19, the outer end of described one way valve 17 cuts off 20 by second and is fixed in lower side direction blind hole 7, and the outer end of lower side direction blind hole 7 is provided with the second pressure cap 21; Be provided with joint ring 23 in described valve union 5, disconnected plug 22 is installed on joint ring 23, described disconnected plug 22 is provided with sealing ring 24 with the inner port sealing of radial direction through hole 11 between joint ring 23 and slug 22.
Operating principle of the present utility model:
in work progress, disconnected plug 22 is with radial direction through hole 11 sealings, make pressure can not act on the end of one way valve 17, when replacing plug by packer valve union 5, touch the disconnected plug 22 that is sealed on radial direction through hole 11 disconnected, when the replacement plug runs to block ring, make and form sealing in sleeve pipe, pressure raises, act on the end of one way valve 17 through radial direction through hole 11, cut off when cutting off 20 setting value and cut off when pressure reaches second, one way valve 17 is opened, liquid is through lower side direction blind hole 7, the 3rd axial hole 10, the second axial hole 9 enters in the expansion chamber of 4 of central tube 2 and packing element assemblies, packing element assembly 4 is expanded form sealing with borehole wall close contact.Simultaneously, pressure in expansion chamber acts on the end of pressure limiting valve 12 through the first axial hole 8, when the pressure in expansion chamber reaches first of pressure limiting valve 12 and cuts off 15 shearing setting value, first cuts off 15 cuts off, pressure limiting valve 12 outwards moves, and hole the 3rd axial hole 10 and the second axial hole 9 are closed, and the size that overlap overpressure this moment has no effect to the pressure in expansion chamber, namely on packer without impact, realize that safety is setting.Well head bleeds off pressure when being zero, and one way valve 17 is autoshutdown under spring 19 and external pressure effect.
Claims (1)
1. external casing packer, it is characterized in that: comprise top connection, central tube, lower contact, packing element assembly and valve union, top connection is connected with the upper end of central tube, the packing element assembly is sleeved on outside central tube, the bottom of packing element assembly is connected with the top of valve union, and the bottom of valve union is connected with lower contact; Have side direction blind hole and lower side direction blind hole on described valve union, upper side direction blind hole is adjacent with lower side direction blind hole, also have the first axial hole, the second axial hole and the 3rd axial hole on described valve union, one end of described the first axial hole and the second axial hole is communicated with the valve union upper end, the other end of the first axial hole and the second axial hole is communicated with upper side direction blind hole, the 3rd axial hole one end passes lower side direction blind hole and is communicated with upper side direction blind hole, the other end of the 3rd axial hole is communicated with the valve union lower surface, the end sealing that described the 3rd axial hole is communicated with the valve union lower surface; A side in lower side direction blind hole is provided with radial direction through hole, and described radial direction through hole is communicated with the sealed end of lower side direction blind hole, the external port sealing of described radial direction through hole; The in-built limited valve of described upper side direction blind hole, fill the first sealing ring on pressure limiting valve, the first axial hole is arranged at the inner one side of side direction blind hole, described the second axial hole and the 3rd axial hole are arranged at the middle part of side direction blind hole, the middle part of described pressure limiting valve is provided with cannelure, make between the second axial hole and the 3rd axial hole to be connected, the outer end of described pressure limiting valve cuts off by first and is fixed in upper side direction blind hole, and the outer end of upper side direction blind hole is provided with the first pressure cap; Be provided with one way valve in described lower side direction blind hole, described the 3rd axial hole is placed in the inboard of lower side direction blind hole, the inner periphery of described one way valve is provided with the second sealing ring, the outer end of described one way valve is set with spring, the outer end of described one way valve cuts off by second and is fixed in lower side direction blind hole, and the outer end of lower side direction blind hole is provided with the second pressure cap; Be provided with joint ring in described valve union, disconnected plug is installed on joint ring, described disconnected plug is provided with sealing ring with the inner port sealing of radial direction through hole between joint ring and slug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220688981XU CN202990958U (en) | 2012-12-14 | 2012-12-14 | Outer packer for casing pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220688981XU CN202990958U (en) | 2012-12-14 | 2012-12-14 | Outer packer for casing pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202990958U true CN202990958U (en) | 2013-06-12 |
Family
ID=48562149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220688981XU Expired - Lifetime CN202990958U (en) | 2012-12-14 | 2012-12-14 | Outer packer for casing pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202990958U (en) |
-
2012
- 2012-12-14 CN CN201220688981XU patent/CN202990958U/en not_active Expired - Lifetime
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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: 20130612 |
|
| CX01 | Expiry of patent term |