CN209040809U - Fixed seating nipple - Google Patents
Fixed seating nipple Download PDFInfo
- Publication number
- CN209040809U CN209040809U CN201821444176.6U CN201821444176U CN209040809U CN 209040809 U CN209040809 U CN 209040809U CN 201821444176 U CN201821444176 U CN 201821444176U CN 209040809 U CN209040809 U CN 209040809U
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- China
- Prior art keywords
- cylinder
- screw thread
- lift valve
- air inlet
- gas lift
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Abstract
The utility model discloses a kind of fixed seating nipples, including cylinder, gas lift valve mounting groove and conical surface thread seal connection structure are provided on the cylinder body outer wall, conical surface thread seal connection structure includes connection screw thread hole, sealing cone and air inlet, connection screw thread hole is axially arranged along cylinder, and connection screw thread hole one end is connected to gas lift valve mounting groove, and sealing cone is arranged in the other end, air inlet is arranged radially along cylinder, and air inlet is connected to by sealing cone with connection screw thread hole.
Description
Technical field
The utility model relates to a kind of oil tool more particularly to a kind of fixed seating nipples, are applicable to oil/gas well and open
Hair, is particularly suitable in high pressure high corrosion gas well operation.
Background technique
In the recovery process of oil/gas well, gaslift is a kind of commonly oil recovery, draining mode.Gas-lift production is using artificial
Compressed gas is injected oil pipe bottom by lifting method, is produced liquid with stratum and is mixed, gas expands in a liquid, reduces the close of liquid
Fluid column weight in degree and oil pipe, declines the flowing pressure gradient in oil pipe, to reduce bottom hole flowing pressure, it is established that by liquid
Body gives rise to the producing pressure differential on ground.
Gas lift valve is mounted on seating nipple, then seating nipple is connected on oil pipe and is specified with oil pipe tripping in deep
Degree, ground controls the opening and closing of gas lift valve by applied pressure by annulus mode, so that annular space gas enters in oil pipe, thus real
Existing artificial lift effect.
Seating nipple plays the role of receiving gas lift valve as gaslift tool, to link up annular space and oil pipe.Traditional work
Cylinder mostly welding structure, and the mode being connected with gas lift valve using NPT screw thread.
Using traditional work barrel structure, there are the following problems:
One, intensity is not high.Welding structure is under downhole corrosion and hot environment, it is easier to and it is cracked, so as to cause work
Make cylinder strength reduction, or even the accidents such as rupture, leakage occur.
Two, sealing reliability is bad.The type of attachment of gas lift valve and seating nipple is NPT screw thread, is required when in use in spiral shell
Raw material band is wound on line, is just able to achieve sealing.And reliability of the raw material band under corrosion and high temperature and pressure hole condition be not high, is easy hair
Phenomena such as raw leakage.
Three, loosely to the protection of gas lift valve.Conventional operation cylinder be gaslift valve position two sides welding (or with screw twist
On) block baffle, to protect gas lift valve.The baffle of this structure is easy to fall off when tubing string meets card or scratches, to cause
Gas lift valve occurs damage and even fails.
From the above, it is seen that conventional fixed-type seating nipple is poorly suitable for corrosion well, gas well and high angle hole.
Summary of the invention
The purpose of the utility model is to overcome the above problems existing for existing fixed seating nipple, provide a kind of fixed
Seating nipple.The utility model can be realized the air seal within 70MPa, and intensity is higher, good reliability.
To achieve the above object, the technical solution adopted in the utility model is as follows:
A kind of fixed seating nipple, it is characterised in that: including cylinder, gas lift valve mounting groove is provided on the cylinder body outer wall
With conical surface thread seal connection structure, conical surface thread seal connection structure includes connection screw thread hole, sealing cone and air inlet, is connected
It connecing threaded hole and is axially arranged along cylinder, connection screw thread hole one end is connected to gas lift valve mounting groove, and sealing cone is arranged in the other end, into
Stomata is arranged radially along cylinder, and air inlet is connected to by sealing cone with connection screw thread hole.
Jackscrew is provided on the outer wall of the cylinder tail portion, jackscrew is connected on cylinder by fine thread for fixing gaslift
Valve.
The air inlet is the blind hole for facing outwardly circular direction from the inner circle of cylinder and processing.
Using utility model has the advantages that
One, seal form is relatively reliable: the utility model uses the conical surface-thread seal type of attachment, relatively NPT form,
Air seal can be realized without twining raw material band in this type of attachment, and performance is relatively reliable.Experiment proves that this structure can be effectively
Realize the hermetic seal within 70MPa.
Two, intensity is higher: the cylinder of utility model works cylinder uses monolithic construction, and intensity is higher.
Three, can protect gas lift valve: valve is mounted in the slot of its cylinder by utility model works cylinder, and two sides have protection
Function, without addition baffle or cover board the defencive function to gas lift valve can be realized, can make gas lift valve rise lower tubular column when from
It scratches and collides.Meanwhile having a jackscrew on the top of cylinder, it can prevent gas lift valve from generating shaking after tightening.
Detailed description of the invention
FIG. 1 is a schematic structural view of the utility model；
Fig. 2 is the portion the A enlarged structure schematic diagram in Fig. 1；
In the figure, it is marked as 1, cylinder, 2, jackscrew, 3, connection screw thread hole, 4, sealing cone, 5, air inlet.
Specific embodiment
Embodiment 1
A kind of fixed seating nipple, including cylinder 1 are provided with gas lift valve mounting groove and conical surface spiral shell on 1 outer wall of cylinder
Line Hermetical connecting structure, conical surface thread seal connection structure include connection screw thread hole 3, sealing cone 4 and air inlet 5, connect spiral shell
Pit 3 is connected to along the axial setting of cylinder 1,3 one end of connection screw thread hole with gas lift valve mounting groove, and sealing cone 4 is arranged in the other end, into
Stomata 5 is arranged radially along cylinder 1, and air inlet 5 is connected to by sealing cone 4 with connection screw thread hole 3.
In the present embodiment, it is provided with jackscrew 2 on the 1 tail portion outer wall of cylinder, jackscrew 2 is connected to cylinder by fine thread
For fixing gas lift valve on 1.
In the present embodiment, the air inlet 5 is the blind hole for facing outwardly circular direction from the inner circle of cylinder 1 and processing.
The seating nipple of the utility model is connect conical surface thread seal is changed to by NPT threaded connection with the type of attachment of valve
Structure, and butt joint carries out the tables such as sandblasting and spraying prescription formula, avoids thread gluing.
The structure of the utility model is monoblock type.That is the cylinder of seating nipple does not weld or other connection structures.
There is a square groove on the cylinder of utility model works cylinder, for installing gas lift valve, and the two sides of slot are (except reserved screw thread
Outside wrench position) retain its tube structure, for protecting gas lift valve.
There is a jackscrew 2 in the tail portion of utility model works cylinder, is connected on cylinder by fine thread.By tightening jackscrew
2, gas lift valve tail portion can be held out against, prevent from shaking.
Embodiment 2
The present embodiment combination attached drawing is described further the utility model, as shown in the figure:
A kind of fixed seating nipple, primary structure include cylinder 1 and jackscrew 2.Conical surface spiral shell is used between gas lift valve and cylinder 1
Line Hermetical connecting structure (as shown in Figure 2), generation the case where to avoid thread gluing and damaging sealing surface, sealing cone 4 with connect spiral shell
Pit 3 takes blasting treatment.The air inlet 5 of seating nipple uses cross-drilled hole form, i.e., faces outwardly circular direction processing from the inner circle of cylinder 1
One blind hole, to link up annular space and oil pipe.Gas lift valve is mounted in the axial square groove of cylinder 1, can play the work of protection gas lift valve
With.
The working principle of the utility model are as follows: gas lift valve is mounted on seating nipple, is lowered into designated depth, ground with oil pipe
Face passes through applied pressure by annulus gas injection.Gas is injected by gas lift valve, then by the air inlet of seating nipple, and then injects oil pipe, thus complete
At artificial lift.Due to the presence of the ball-and-seat of gas lift valve, the fluid in oil pipe may not flow into oil jacket annulus.
Claims (3)
1. a kind of fixed seating nipple, it is characterised in that: including cylinder (1), gas lift valve peace is provided on cylinder (1) outer wall
Tankage and conical surface thread seal connection structure, conical surface thread seal connection structure include connection screw thread hole (3), sealing cone (4)
With air inlet (5), connection screw thread hole (3) is axially arranged along cylinder (1), and connection screw thread hole (3) one end and gas lift valve mounting groove connect
Logical, sealing cone (4) are arranged in the other end, and air inlet (5) is arranged radially along cylinder (1), and air inlet (5) passes through sealing cone (4)
It is connected to connection screw thread hole (3).
2. fixed seating nipple according to claim 1, it is characterised in that: be provided on the outer wall of cylinder (1) tail portion
Jackscrew (2), jackscrew (2) are connected on cylinder (1) by fine thread for fixing gas lift valve.
3. fixed seating nipple according to claim 2, it is characterised in that: the air inlet (5) is from the interior of cylinder (1)
The blind hole of disc circular direction processing outwardly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821444176.6U CN209040809U (en) | 2018-09-05 | 2018-09-05 | Fixed seating nipple |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821444176.6U CN209040809U (en) | 2018-09-05 | 2018-09-05 | Fixed seating nipple |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209040809U true CN209040809U (en) | 2019-06-28 |
Family
ID=67032299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821444176.6U Active CN209040809U (en) | 2018-09-05 | 2018-09-05 | Fixed seating nipple |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209040809U (en) |
-
2018
- 2018-09-05 CN CN201821444176.6U patent/CN209040809U/en active Active
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