CN204024614U - Counter-flow resisting bridge type eccentric injection mandrel - Google Patents
Counter-flow resisting bridge type eccentric injection mandrel Download PDFInfo
- Publication number
- CN204024614U CN204024614U CN201420278466.3U CN201420278466U CN204024614U CN 204024614 U CN204024614 U CN 204024614U CN 201420278466 U CN201420278466 U CN 201420278466U CN 204024614 U CN204024614 U CN 204024614U
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- Prior art keywords
- spool
- valve
- counter
- valve pocket
- bridge type
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- Expired - Lifetime
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- 238000002347 injection Methods 0.000 title claims abstract description 37
- 239000007924 injection Substances 0.000 title claims abstract description 37
- 230000002093 peripheral effect Effects 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 32
- 210000002445 nipple Anatomy 0.000 claims description 27
- 238000007789 sealing Methods 0.000 claims description 11
- 229910010293 ceramic material Inorganic materials 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 3
- 241000283216 Phocidae Species 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000011010 flushing procedure Methods 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Lift Valve (AREA)
Abstract
The utility model discloses a kind of counter-flow resisting bridge type eccentric injection mandrel, in this injection well downhole flow regulator, the valve seat of one way valve is provided with the anti-bias guide pillar assembling with spool sleeve, between anti-bias guide pillar and spool, be provided with the valve spring that closes for pushing tow spool, between the outer peripheral face of spool and the internal face of valve pocket, there is anti-clamping stagnation gap, in use, the anti-bias guide pillar that spool assembles by its upper sleeve is realized anti-bias guiding movement, by closing valve spring, realize again the effect of unidirectional control, anti-clamping stagnation gap between spool and valve pocket can guarantee that foreign material can not be stuck between the outer peripheral face of spool and the internal face of valve pocket, thereby the foreign material that make to be mixed in current are not affecting the movement of spool in valve pocket, make the movement of spool in valve pocket more smooth.
Description
Technical field
The utility model relates to oilfield exploitation field, relates in particular to a kind of counter-flow resisting bridge type eccentric injection mandrel.
Background technology
At present, oil field enters the high water-cut development later stage, along with the long-term erode rock skeleton of injected water causes loosening, especially at polymer, turn and polymer profile control, proceed to after follow-up waterflooding development, the eccentric injection mandrel that down-hole string adopts is Open architecture, when separate water injection well stops note-step-down-well-flushing, along with water injection pressure reduces suddenly, liquid in layering can carry polymer clump or sand enters injection well downhole flow regulator and water injection string, thereby stop up the well-flushing passage of water-distributing tool and water injection packer, cause tester to carry out dropping-fishing test by G.I.H, anti-flushing well is obstructed, cause dispensing period of validity short, even cannot dispensing.
Chinese patent literature CN20270717U discloses a kind of anti counter-flowing eccentric injection mandrel, this injection well downhole flow regulator comprises seating nipple main body, in the sidewall of seating nipple main body, offer the inclined to one side hole of axial setting, the both sides in hole are provided with valve pocket partially, the inner aperture of valve pocket is communicated with inclined to one side hole, aperture, outer end is communicated with the mounting groove of offering in the periphery of seating nipple main body, between the outer peripheral face of the wall surface of the hole of each valve pocket and seating nipple main body, all connect and be provided with weep hole, and be respectively fitted with one way valve in each valve pocket position, one way valve comprises that screw is connected to the valve seat in the groove bottom of mounting groove, that between the spool of the T shape of shutoff in valve pocket and spool and valve seat, assembles closes valve spring, wherein the head outer peripheral face of spool and the wall surface of the hole of valve pocket coordinate along the length direction guiding of valve pocket, be that spool directly coordinates to play the effect that guiding is slided with the wall surface of the hole of valve pocket, while having foreign material to enter between the outer peripheral face of spool and the wall surface of the hole of valve pocket like this, the slip of spool in valve pocket there will be the situation of clamping stagnation, even when the interference of foreign material is more serious, spool can be stuck in valve pocket, so that there is the situation that water outlet is not smooth in injection well downhole flow regulator, affect normally carrying out of seperated layer water injection.
Utility model content
The purpose of this utility model is to provide a kind of counter-flow resisting bridge type eccentric injection mandrel, is intended to solve the situation of the easy clamping stagnation of weep hole position one way valve of seating nipple main body in prior art.
In order to realize above object, in the utility model, the technical scheme of counter-flow resisting bridge type eccentric injection mandrel is as follows:
Counter-flow resisting bridge type eccentric injection mandrel, comprise seating nipple main body, the barrel of seating nipple main body is provided with valve pocket and the one way valve in weep hole position, one way valve comprises the valve seat being fixed on barrel and is assemblied in the spool in valve pocket, valve seat is provided with the anti-bias guide pillar with the assembling of spool sleeve, between anti-bias guide pillar and spool, be provided with the valve spring that closes for pushing tow spool, between the outer peripheral face of spool and the internal face of valve pocket, there is anti-clamping stagnation gap.
One end towards valve seat of spool offers the blind hole of inserting for anti-bias guide pillar, between the wall surface of the hole of blind hole and the outer peripheral face of anti-bias guide pillar, has assemblage gap, closes valve spring in described assemblage gap.
One end of the valve seat dorsad of spool is provided with the sealing surface of taper.
Valve seat submerges in valve pocket, and the periphery of valve seat is provided with the external screw thread being threaded with the internal face of valve pocket.
On the internal face of valve pocket, convex with block at valve seat the gear edge towards a side of spool.
Spool is the block that ceramic materials is made.
On valve seat, offer through hole.
In the barrel of seating nipple main body, be fitted with blanking plug, the cross-sectional area of crossing water nozzle on blanking plug is not more than the cross-sectional area of described through hole.
In the barrel of seating nipple main body, be fitted with blanking plug, through hole has more than two, and the cross-sectional area sum of each through hole is greater than the cross-sectional area of crossing water nozzle on blanking plug.
Valve pocket and one way valve all have two, and each valve pocket and one way valve be corresponding setting respectively.
In the utility model, the valve seat of one way valve is provided with the anti-bias guide pillar assembling with spool sleeve, between anti-bias guide pillar and spool, be provided with the valve spring that closes for pushing tow spool, between the outer peripheral face of spool and the internal face of valve pocket, there is anti-clamping stagnation gap, in use, the anti-bias guide pillar that spool assembles by its upper sleeve is realized anti-bias guiding movement, by closing valve spring, realize again the effect of unidirectional control, anti-clamping stagnation gap between spool and valve pocket can guarantee that foreign material can not be stuck between the outer peripheral face of spool and the internal face of valve pocket, thereby the foreign material that make to be mixed in current are not affecting the movement of spool in valve pocket, make the movement of spool in valve pocket more smooth.
Further, valve seat submerges in valve pocket, the periphery of valve seat is provided with the external screw thread being threaded with the internal face of valve pocket, compared with prior art, when valve seat is installed, without offer again corresponding mounting groove in the periphery of seating nipple, and rely on valve seat being threaded in valve pocket to fix valve seat, thereby make the overall structure of seating nipple main body can be not destroyed, functional reliability be better.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of embodiment of the utility model;
Fig. 2 is the structural representation of blanking plug in Fig. 1;
Fig. 3 is that the A-A of Fig. 1 is to sectional view;
Fig. 4 is the structural representation of the valve seat of one way valve in Fig. 3.
The specific embodiment
The embodiment of counter-flow resisting bridge type eccentric injection mandrel in the utility model: as shown in Figures 1 to 4, this injection well downhole flow regulator is a kind of bridge-type single current eccentric injection mandrel, it comprises seating nipple and blanking plug 9, seating nipple is by the top connection 1 being threaded successively from top to bottom, upper steel bushing 3, seating nipple main body 4, lower steel bushing 5 and lower contact 8 form, the connection of thread of adjacent component is respectively equipped with hermetically-sealed construction, the central passage of seating nipple main body 4 is main channel, in the barrel of seating nipple main body 4, offer two pairs of passageway bridges that are arranged symmetrically with 19 and an inclined to one side hole 20, the bottom in hole 10 is provided with bottom opening 16 partially, bottom opening 16 is communicated with main channel, passageway bridge 19 and partially hole 20 be extending axially along seating nipple main body 4 all, the hypomere in hole 20 is communicated with by 14Yu main channel, inlet opening partially, epimere is communicated with external by valve pocket and weep hole successively, valve pocket has two and be arranged symmetrically in the both sides in inclined to one side hole 20, in two valve pockets, be respectively equipped with one way valve 21.One way valve 21 is by the valve seat 211 setting gradually from outside to inside, close valve spring 212 and spool 213 formations, wherein spool 213 adopts ceramic materials to make, valve seat 211 is threaded on the internal face of valve pocket by the external screw thread arranging on its outer peripheral face, and on the internal face of valve pocket, convex with block at valve seat 211 the annular gear edge of a section towards spool 213, at the middle part of valve seat 211, convex with the anti-bias guide pillar 214 extending towards spool 213, anti-bias guide pillar 214 is inserted in the blind hole of offering on spool 213, and close valve spring 212, be installed between anti-bias guide pillar 214 and spool 213, the two ends of closing valve spring 212 respectively pushing tow at valve seat 211 on the end face of spool 213 and the wall surface of the hole of blind hole, and between the outer peripheral face of spool 213 and the chamber wall of valve pocket, have annular anti-clamping stagnation gap.Valve pocket is the stepped hole that outer imperial palace is little, the internal face of valve pocket is provided with in the spool 213 annular valve port of valve seat 211 1 sides dorsad, this annular valve port and spool 213 pass through cone match, so that the sealing effectiveness of spool 213 on valve port is more reliable, one end of the valve seat dorsad 211 of spool 213 is provided with the sealing surface of taper.On valve seat 211, offer four through holes 215 of arranging around anti-bias guide pillar 214, the cross-sectional area sum of these four through holes 215 and corresponding delivery port is greater than the cross-sectional area of blanking plug water nozzle, produces chock pressure difference when preventing that water from passing through delivery port.
Blanking plug comprises fishing head 22, gland 23, O type cushion rubber, stage clip 25, torsion spring 26, camshaft 27, cam 28 and seal 29, in seal 29, be provided with the axial upwardly extending inner chamber in self sealss body lower surface, the top of inner chamber is water chamber section, the spaced apart delivery port that is provided with along the circumferential direction on water chamber section sidewall, it below water chamber section, is plunger shaft section, in plunger shaft section, sealing is provided with temporarily stifled piston 33, temporarily stifled piston 33 is fixed together with the chamber wall of plunger shaft section by the shear pin 31 radially arranging, shear pin 31 can be cut off when injection hydraulic pressure reaches shear pin yield shear stress, temporarily stifled piston 33 is sealed and matched by being arranged on sealing ring on its side face and the chamber wall of plunger shaft section.The lower end of seal 29 is connected with filter screen set 37, the lower end of filter screen set is connected with the end stifled 36, filter screen set 37 has formed the intake antrum section of blanking plug, between intake antrum section and plunger shaft section, be provided with water nozzle 35, intake antrum section is communicated with plunger shaft section by water nozzle, and the cross-sectional area of crossing the mouth of a river of water nozzle 35 is less than the gross area of the delivery port of water chamber section, between water nozzle and sealed body cavity wall, by sealing ring, is sealed and matched.The elongated worry hole of extending vertically of offering on the perisporium of filter screen set 37 has formed the water inlet of blanking plug.Blanking plug is provided with six groups, three road sealing ring, wherein, upper and lower in delivery port on seal outer peripheral face is provided with Liang Zu tetra-road sealing rings, on the side face at the end stifled 36, is provided with one group of two seals circle, and blanking plug is sealed and matched by these San Zu six road sealing rings and the inclined to one side hole of injection well downhole flow regulator.
In the endoporus of upper steel bushing 3, be fitted with centralizer body 2, centralizer body 2 is fixedly connected with by bolt 17 screw threads with the top end face of seating nipple main body 4.The support 6 that has been threaded in the lower end of seating nipple main body 4, the lower end of support 6 is connected with guide way 7.In the inclined to one side hole of seating nipple main body 4,10 inside walls are respectively equipped with seal section 11, middle seal section 13 and lower seal section 15 from top to bottom, three groups of sealing rings on blanking plug respectively with three corresponding being sealed and matched of seal section, inlet opening in seating nipple main body 4 and weep hole are enclosed in respectively in each self-corresponding seal cavity, and the filter screen set 37 of inlet opening 14, blanking plug 9, water nozzle 35 form a waterflood path with weep hole 12, one way valve 21.
In use to pressure water injection in the inlet opening 14 of bridge-type single current eccentric injection mandrel, injected water in inlet opening 14 enters water nozzle 35 inner chambers by filter screen 20, arrive temporarily stifled piston 33 lower surfaces, when pressure reaches certain limit, pin 31 is cut off, and now weep hole 12 is communicated with water nozzle 35 inner chambers, inlet opening 14, and the injected water in inlet opening 14 promotes one way valve by weep hole 23 and moves radially, and it is outside to enter bridge-type single current eccentric injection mandrel, down-hole string is realized normal water filling.When stopping the situations such as note, test step-down, close valve spring 212 one way valve 21 spools 213 are resetted, between reliable preventing layer, flow backwards, cause the waste of invalid water filling, the energy.
In operation process, if blanking plug 9 need to be pulled out to inclined to one side hole 10, after pulling out, impurity in tubing string, dirt etc. can be after entering inclined to one side hole 10, by bottom opening 16, enter tubing string bottom, thereby can, in the interior obstruction in hole 10 partially, not prevent that when blanking plug 9 from dropping into again, phenomenon not in place is thrown in generation.
In the above-described embodiments, valve pocket and one way valve all have two, and each valve pocket and one way valve be corresponding setting respectively, to increase the water yield of whole injection well downhole flow regulator, avoid occurring in water outlet place the problem that current stop up, in other embodiments, the number of valve pocket and one way valve can be also a pair of or more than two pairs.
In the above-described embodiments, valve seat is threaded connection and is fixed in valve pocket, and in other embodiments, valve seat also can be fixed on the outer peripheral face of seating nipple main body or be fixed in the barrel of seating nipple main body by structures such as welding, riveted joints.
In the above-described embodiments, anti-bias guide pillar is inserted in spool, and in other embodiments, anti-bias guide pillar also can be sleeved on spool.
Claims (10)
1. counter-flow resisting bridge type eccentric injection mandrel, comprise seating nipple main body, the barrel of seating nipple main body is provided with valve pocket and the one way valve in weep hole position, one way valve comprises the valve seat being fixed on barrel and is assemblied in the spool in valve pocket, it is characterized in that, valve seat is provided with the anti-bias guide pillar with the assembling of spool sleeve, is provided with the valve spring that closes for pushing tow spool between anti-bias guide pillar and spool, has anti-clamping stagnation gap between the outer peripheral face of spool and the internal face of valve pocket.
2. counter-flow resisting bridge type eccentric injection mandrel according to claim 1, it is characterized in that, one end towards valve seat of spool offers the blind hole of inserting for anti-bias guide pillar, between the wall surface of the hole of blind hole and the outer peripheral face of anti-bias guide pillar, has assemblage gap, closes valve spring in described assemblage gap.
3. counter-flow resisting bridge type eccentric injection mandrel according to claim 1, is characterized in that, one end of the valve seat dorsad of spool is provided with the sealing surface of taper.
4. counter-flow resisting bridge type eccentric injection mandrel according to claim 1, is characterized in that, valve seat submerges in valve pocket, and the periphery of valve seat is provided with the external screw thread being threaded with the internal face of valve pocket.
5. counter-flow resisting bridge type eccentric injection mandrel according to claim 4, is characterized in that, on the internal face of valve pocket, convex with block at valve seat the gear edge towards a side of spool.
6. counter-flow resisting bridge type eccentric injection mandrel according to claim 1, is characterized in that, spool is the block that ceramic materials is made.
7. according to the counter-flow resisting bridge type eccentric injection mandrel described in any one in claim 1 to 6, it is characterized in that, on valve seat, offer through hole.
8. counter-flow resisting bridge type eccentric injection mandrel according to claim 7, is characterized in that, in the barrel of seating nipple main body, is fitted with blanking plug, and the cross-sectional area of crossing water nozzle on blanking plug is not more than the cross-sectional area of described through hole.
9. counter-flow resisting bridge type eccentric injection mandrel according to claim 7, is characterized in that, in the barrel of seating nipple main body, is fitted with blanking plug, and through hole has more than two, and the cross-sectional area sum of each through hole is greater than the cross-sectional area of crossing water nozzle on blanking plug.
10. according to the counter-flow resisting bridge type eccentric injection mandrel described in any one in claim 1 to 6, it is characterized in that, valve pocket and one way valve all have two, and each valve pocket and one way valve be corresponding setting respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420278466.3U CN204024614U (en) | 2014-05-28 | 2014-05-28 | Counter-flow resisting bridge type eccentric injection mandrel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420278466.3U CN204024614U (en) | 2014-05-28 | 2014-05-28 | Counter-flow resisting bridge type eccentric injection mandrel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204024614U true CN204024614U (en) | 2014-12-17 |
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ID=52064498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420278466.3U Expired - Lifetime CN204024614U (en) | 2014-05-28 | 2014-05-28 | Counter-flow resisting bridge type eccentric injection mandrel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204024614U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109209295A (en) * | 2018-11-02 | 2019-01-15 | 天津诚泽畅石油技术有限公司 | Downhole production and backwash dual function valve |
| CN113216914A (en) * | 2021-06-09 | 2021-08-06 | 门万龙 | Layered injection allocation device |
-
2014
- 2014-05-28 CN CN201420278466.3U patent/CN204024614U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109209295A (en) * | 2018-11-02 | 2019-01-15 | 天津诚泽畅石油技术有限公司 | Downhole production and backwash dual function valve |
| CN109209295B (en) * | 2018-11-02 | 2023-11-24 | 天津诚泽畅石油技术有限公司 | Underground production and backwashing dual-function valve |
| CN113216914A (en) * | 2021-06-09 | 2021-08-06 | 门万龙 | Layered injection allocation device |
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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: 20141217 |
|
| CX01 | Expiry of patent term |