CN208830942U - Wellhead hookup - Google Patents
Wellhead hookup Download PDFInfo
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- CN208830942U CN208830942U CN201821256262.4U CN201821256262U CN208830942U CN 208830942 U CN208830942 U CN 208830942U CN 201821256262 U CN201821256262 U CN 201821256262U CN 208830942 U CN208830942 U CN 208830942U
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- seal
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- gasket ring
- casing
- concave step
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Abstract
The utility model provides a kind of wellhead hookup, belongs to oil well rig field.The device includes: fastener, gland, cone, shell, first seal, greasing mouth, the first gasket ring, second seal, the second gasket ring and casing coupling；Inner walls are peripherally disposed concave step, and the second gasket ring, second seal, the first gasket ring, first seal and cone sequentially be inlaid in the shell in the concave step of wall；Greasing mouth is set on the outer wall of shell, and is communicated with the first gasket ring；Fastener is detachably connected with gland and shell, casing coupling and casing connection, cone, first seal, the first gasket ring, second seal and the second gasket ring inner wall offset respectively with the outer wall of casing.While device provided by the utility model meets wellhead casing pipe suspension seal request, well head pressure-bearing is identical as the former bearing capacity of wellhead assembly, reduces well control risk.
Description
Technical field
The utility model belongs to oil well rig technical field, in particular to wellhead hookup.
Background technique
With the extension of time, production casing is in shaft bottom by earth's surface aqueous corrosion, the caused operation of rock stress variation
After damage, it may occur that situations such as deforming, corrosion failure, causing the oil well halt production underproduction and well control out of control.Therefore, it is necessary to will fail
Casing is taken.When underground takes failure casing, need to change well head and by original wellhead hookup, such as ring steel
Plate, casing head hanger etc. are removed.The leakproofness of wellhead hookup after dismounting is destroyed, and it is hidden that there are well control safeties
Suffer from.Therefore, it is necessary to provide when a kind of underground takes failure casing, there is no the well heads for changeing the well control safety problem after well head
Suspension arrangement.
The wellhead hookup that the relevant technologies use includes suspension main body, hangings seals and locating part.Hang main body master
It to include doughnut-shaped steel plate, for connecting with oil pipe, hangings seals are limited for being sealed between doughnut-shaped steel plate and oil pipe
Part is used for the position of stationary annular steel plate.
Designer has found the relevant technologies, and there are following technical problems:
There are safety problems when doughnut-shaped steel plate is connect with oil pipe, and welding quality not can guarantee, and well head bearing capacity is far low
In former wellhead hookup, there are well control safety hidden danger.
Utility model content
The utility model embodiment provides a kind of wellhead hookup, can solve above-mentioned technical problem.Particular technique side
Case is as follows:
On the one hand, the utility model embodiment provides a kind of wellhead hookup, and described device includes: fastener, pressure
Lid, cone, shell, first seal, greasing mouth, the first gasket ring, second seal, the second gasket ring and casing coupling；
The inner walls are peripherally disposed a concave step, second gasket ring, the second seal, described
First gasket ring, the first seal and the cone are sequentially embedded in the concave step of the inner walls；
The greasing mouth is set on the outer wall of the shell, and is communicated with first gasket ring；
The fastener is detachably connected with the gland and the shell, described sleeve pipe box cupling and casing connection, institute
State the inner wall of cone, the first seal, first gasket ring, the second seal and second gasket ring respectively with
The outer wall of described sleeve pipe offsets.
Optionally, the concave step includes the first concave step and the second concave step；
The tilt angle of second concave step is greater than the tilt angle of first concave step；
Second gasket ring, the second seal, first gasket ring and the first seal are sequentially embedded in institute
It states in the first concave step, the cone is embedded in second concave step.
Optionally, the outer diameter of described sleeve pipe box cupling is greater than the internal diameter of the cone.
Optionally, the gland is detachably connected with described sleeve pipe box cupling.
Optionally, the gland is detachably connected with the shell.
Optionally, the housing bottom offers the bolt hole for connecting with casing head flange.
Optionally, the bottom end of the shell is also provided with steel ring slot compatible with described sleeve pipe head flange flange hole.
Optionally, pressure communication hole is offered on the shell, and pressure gauge is installed on the pressure communication hole.
Optionally, the greasing mouth is detachably connected with the shell.
Optionally, the quantity of the greasing mouth is 2-6.
When technical solution provided by the embodiment of the utility model has the benefit that underground takes failure casing, beat
It pulls failure casing out, the lower end of shell is connect with casing head flange, casing coupling connecting sleeve, from the inside tripping in of shell.
By the casing of tripping in and tunica pipe tie-back cementing.Casing is above mentioned after well cementation, successively by the second gasket ring, second seal, the first pad
Ring, first seal, cone are sleeved on sleeve outer wall, and are be inlaidd in the shell in the concave step of wall.Transfer casing, casing
Box cupling generates downward pressure to cone, and then generates pressure to first seal, second seal, makes first seal and the
Two sealing element dilatancies realize the sealing between casing and shell, inject stop-leak compound by greasing mouth, improve the sealing of device
Performance.By being detachably connected with gland, shell, fixed device does not move fastener.Dress provided by the utility model
Set meet wellhead casing pipe suspension seal request while, well head pressure-bearing with original the bearing capacity of wellhead assembly it is identical, reduce well
Control risk.
Detailed description of the invention
It, below will be to required in embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing to be used is briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the utility model
Example is applied, it for those of ordinary skill in the art, without creative efforts, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is wellhead hookup structural schematic diagram provided by the embodiment of the utility model.
Appended drawing reference respectively indicates:
1- fastener,
2- gland,
3- cone,
4- shell,
5- first seal,
6- greasing mouth,
The first gasket ring of 7-,
8- second seal,
The second gasket ring of 9-,
10- casing coupling,
11- steel ring slot.
Specific embodiment
Unless otherwise defined, all technical terms used in the utility model embodiment all have and those skilled in the art
Normally understood identical meaning.To keep the purpose of this utility model, technical solution and advantage clearer, below in conjunction with attached
Figure is described in further detail the utility model embodiment.
The utility model embodiment provides wellhead hookup, and as shown in Fig. 1, which includes: fastener 1, pressure
Lid 2, cone 3, shell 4, first seal 5, greasing mouth 6, the first gasket ring 7, second seal 8, the second gasket ring 9 and casing coupling
10。
4 inner wall of shell is peripherally disposed concave step, the second gasket ring 9, second seal 8, the first gasket ring 7,
One sealing element 5, cone 3 are sequentially embedded in the concave step of 4 inner wall of shell.
Greasing mouth 6 is set on the outer wall of shell 4, and is communicated with the first gasket ring 7.
Fastener 1 is detachably connected with gland 2 and shell 4, casing coupling 10 and casing connection, and cone 3, first seals
Part 5, the first gasket ring 7, second seal 8 and the second gasket ring 9 inner wall offset respectively with the outer wall of casing.
When underground takes failure casing, failure casing is salvaged, the lower end of shell 4 is connect with casing head flange, casing
10 connecting sleeve of box cupling, from the inside tripping in of shell 4.By the casing of tripping in and tunica pipe tie-back cementing.Casing is above mentioned after well cementation,
Successively the second gasket ring 9, second seal 8, the first gasket ring 7, first seal 5, cone 3 are sleeved on sleeve outer wall, and inlayed
In the concave step of 4 inner wall of shell.Casing is transferred, casing coupling 10 generates downward pressure to cone 3, and then to first
Sealing element 5, second seal 8 generate pressure, and first seal 5 and 8 dilatancy of second seal is made to realize casing and shell 4
Between sealing, by greasing mouth 6 inject stop-leak compound, improve the sealing performance of device.Fastener 1 by with gland 2, shell 4
Be detachably connected, fixed device does not move.Device provided by the utility model meets wellhead casing pipe suspension seal request
While, well head pressure-bearing is identical as the former bearing capacity of wellhead assembly, reduces well control risk.
In order to make have enough on cone 3 and first seal 5, the first gasket ring 7, second seal 8 and the second gasket ring 9
Pressure, extruding to first seal 5, the first gasket ring 7, second seal 8 and the second gasket ring 9 is realized, to realize this dress
Set the sealing between casing, after transferring casing tie-back cementing, using workover rig by sleeve lift to the top of shell 4, and benefit
Apply suspending weight load 200KN or more with the weight of casing itself, to realize above-mentioned extruding sealing.
Device provided by the embodiment of the utility model will be summarized respectively below:
Optionally, concave step includes the first concave step and the second concave step, the tilt angle of the second concave step
Greater than the tilt angle of the first concave step.
As shown in Fig. 1,4 inner wall of shell is peripherally disposed concave step, and concave step includes the first spill platform
Rank and the second concave step.In order to outer with above-mentioned second gasket ring 9, second seal 8, the first gasket ring 7 and first seal 5
Wall offsets, and the tilt angle of the first concave step is 90 °.
Second gasket ring 9, second seal 8, the first gasket ring 7, first seal 5 are sequentially embedded in the first concave step,
Cone 3 is embedded in the second concave step.
It is understood that the second gasket ring 9, second seal 8, the first gasket ring 7, first seal 5 and cone 3 all cover
On casing, second gasket ring 9, second seal 8, the first gasket ring 7, first seal 5 and cone 3 are applied by shell 4
Towards the pressure in the center of circle, to realize the sealing to casing and above-mentioned parts clearance, and then the sealing between casing and device is realized.
It is understood that the second gasket ring 9, second seal 8, the first gasket ring 7, the diameter of first seal 5 and cone 3 are identical,
To realize extruding of 4 inner wall of shell to above-mentioned component, and then realize the sealing between casing.
In order to offset with the conical outer wall of cone 3, the angle of the second concave step is 90 ° -170 °.For example, 90 °, 100 °,
110 °, 120 °, 130 °, 140 °, 150 °, 160 °, 170 ° etc..
It is understood that the cone angle of cone 3 should be in order to offset with the second concave step on 4 inner wall of shell
The cone angle of two concave steps is adapted, to achieve the effect that the two mutual extrusion, sealing.It is exemplary, when the second concave step is opened
If angle when being 100 °, the cone angle of 3 outer wall of cone can be 80 °, be offseted with realizing with the second concave step.
Optionally, the outer diameter of casing coupling 10 is greater than the internal diameter of cone 3.
When operation, after casing coupling 10 and casing connection, G.I.H, in order to make the upper end of casing coupling 10 Yu cone 3
It offsets, downward pressure is generated to cone 3, it is to be understood that the internal diameter of cone 3 is greater than the outer diameter of casing, but is less than casing
The outer diameter of box cupling 10 prevents casing coupling 10 from by cone 3, and then make to cover so that cone 3 limits casing coupling 10
Pipe is extruded in cone 3 by casing coupling 10, is applied pressure to first seal 5, second seal 8, is made first seal 5
The sealing between casing and shell 4 is realized with 8 dilatancy of second seal.
Optionally, gland 2 is detachably connected with casing coupling 10.It is exemplary, it can be threaded connection etc..
Gland 2 is extruded in cone 3 after connecting with casing coupling 10, is padded to the first seal 5, first of 3 lower section of cone
Ring 7, second seal 8 and the second gasket ring 9 apply pressure, carry out extruding sealing.
Optionally, as shown in Fig. 1, gland 2 is detachably connected with shell 4.
The upper end of gland 2 and shell 4 offers through-hole, it is to be understood that through-hole and 4 upper end of shell on gland 2
Through-hole is adapted, i.e. permission fastener 1 connects the two fastener also cross gland 2 and shell 4.As an example, tightly
Firmware 1 can be bolt.By the way that gland 2 and shell 4 to be bolted, avoids using fire operation, avoids fire hazard,
The quality of connection that ensure that device reduces well control risk.
Optionally, the bottom end of shell 4 offers the bolt hole for connecting with casing head flange.
Shell 4 is connected by bolt hole, steel ring and casing head flange.The quantity of bolt hole is 2-6, exemplary, can be with
It is 2,4,6 etc..
Optionally, as shown in Fig. 1,4 bottom end of shell is also provided with steel ring slot compatible with casing head flange flange hole
11.The quantity of steel ring slot 11 is determined according to the quantity of casing head flange flange hole, can be 4-8, such as 4,6,8
Deng.The diameter of steel ring slot 11 is identical as the flange bore dia of casing head flange, to realize casing head flange and the present apparatus
Connection.
Optionally, pressure communication hole is offered on shell 4, pressure communication is equipped with pressure gauge on hole.
In order to detect the pressure between oil jacket annulus, convenient for the management of oil well, on the outer wall of shell 4, it is located at greasing mouth 6
Lower end pressure communication hole is set, pressure communication is equipped with pressure gauge on hole.
As shown in Fig. 1, third concave step is provided on the outer wall of shell 4, greasing mouth 6 is arranged in third concave step
It is interior.In order to guarantee that the stability and fastness of greasing mouth 6, the length that greasing mouth 6 stretches out on 4 outer wall of shell are less than or equal to shell
The outer diameter of 4 third concave step of body.
As an example, third concave step can be the concave step of the rectangular shaped opened up along 4 outer wall of shell,
It can be the concave step with certain radian.
As shown in Fig. 1, the second gasket ring 9 can be air ring ring, and internal diameter is greater than the outer diameter of casing, to be sleeved on down
On the casing entered.As an example, the second gasket ring 9 can also be made of two diameters, the identical semicircular ring of material, operation
When, the second gasket ring 9 is sleeved on casing respectively and is packed into the concave step of shell 4, bear from upper sleeve, cone 3,
The pressure of first seal 5, the second gasket ring 7 and second seal 8.
As shown in Fig. 1, second seal 8 is placed on 9 top of the second gasket ring, and second seal 8 can be ring type seal,
Its internal diameter is greater than the outer diameter of casing, and to be sleeved on casing, outer diameter is greater than the internal diameter of the first concave step, to be embedded in the
In one concave step, and extruding is generated to casing, realizes the sealing between casing and second seal 8 and shell 4.
The inner wall of second seal 8 offsets with casing, and the inner wall of outer wall and shell 4 offsets, between casing and shell 4
Gap is sealed.As an example, it is identical to can be two materials for second seal 8, the identical semicircular ring sealing of radius
Circle when operation, can first be put into half semicircle annular seal, then put the other half semicircle annular seal.
As shown in Fig. 1, the first gasket ring 7 is equipped with above second seal 8, the first gasket ring 7 is depot fat gasket ring, and internal diameter is big
In the outer diameter of casing, to be sleeved on casing.In order to make the stop-leak compound injected from greasing mouth 6 enter first seal 5 and the
Between two sealing elements 8, and casing and the gap of first seal 5, second seal 8 are sealed, are set on the first gasket ring 7
It is equipped with equally distributed through-hole, stop-leak compound is injected by greasing mouth 6, stop-leak compound is uniformly distributed by the through-hole on the first gasket ring 7,
Realize sealing.
Optionally, greasing mouth 6 is detachably connected with shell 4.It is exemplary, it can be threaded connection etc..
Optionally, the quantity of greasing mouth 6 is 2-6, exemplary, can be 2,4,6 etc..Greasing mouth 6 is along shell 4
It is circumferentially disposed on 4 outer wall of shell, and is connected with the first gasket ring 7.
Through-hole identical with the first gasket ring 7 is equipped in greasing mouth 6, to inject stop-leak compound in the first gasket ring 7.In order to protect
That demonstrate,proves greasing mouth 6 stablizes installation, and greasing mouth 6 is located within the third concave step that 4 outer wall of shell opens up.I.e. without departing from shell 4
The third concave step of outer wall.
As shown in Fig. 1, first seal 5 can be ring type seal, and internal diameter is greater than the outer diameter of casing, to be set with
On casing.
Cone 3 is equipped with above first seal 5, cone 3 is round conical ring, is sleeved on sleeve outer wall.As an example,
It is identical that cone 3 is also possible to two materials, the identical semicircle conical ring composition of diameter.
As shown in Fig. 1, the second concave step of the outer wall with shell 4 of cone 3 offsets, in order to allow cone 3 and shell
Body 4 offsets, and realizes sealing function, and the cone angle of 3 outer wall of cone should mutually be fitted with the cone angle of the second concave step of shell 4
Match.
Wellhead hookup provided by the embodiment of the utility model is by first seal 5 and second seal 8 to device
It is sealed between casing, high performance stop-leak compound is injected by greasing mouth 6, it is close to further progress between device and casing
Envelope, the casing of tripping in is extruded in cone 3 after connecting with casing coupling 10, can not only give first seal 5, the first gasket ring 7,
Second seal 8, the second gasket ring 9 apply pressure, carry out the sealing between device and casing, meanwhile, the bearing capacity of cone 3 with
The bearing capacity of former wellhead hookup is identical, and ensure that sealing performance, improves the utilization efficiency of wellhead hookup.
By replacing various sizes of cone 3, first seal 5, the first gasket ring 7, second seal 8 and the second gasket ring 9,
It can be adapted for the suspension of different size casings and can guarantee the leakproofness of well head, reduce well control risk.
Wellhead hookup provided by the embodiment of the utility model is small in size, and structure is simple, has stronger adaptability, can
To be suitable for the change casing workover treatment of existing all kinds of oil wells, well.
The foregoing is merely the illustrative embodiments of the utility model, the protection model that is not intended to limit the utility model
It encloses, within the spirit and principle of the utility model, any modification, equivalent replacement, improvement and so on should be included in this
Within the protection scope of utility model.
Claims (10)
1. a kind of wellhead hookup, which is characterized in that described device includes: fastener (1), gland (2), cone (3), shell
(4), first seal (5), greasing mouth (6), the first gasket ring (7), second seal (8), the second gasket ring (9) and casing coupling
(10)；
Shell (4) inner wall is peripherally disposed concave step, second gasket ring (9), the second seal
(8), first gasket ring (7), the first seal (5) and the cone (3) are sequentially embedded in the shell (4) inner wall
In the concave step；
The greasing mouth (6) is set on the outer wall of the shell (4), and communicates with first gasket ring (7)；
The fastener (1) is detachably connected with the gland (2) and the shell (4), described sleeve pipe box cupling (10) and set
Pipe connection, the cone (3), the first seal (5), first gasket ring (7), the second seal (8) and institute
The inner wall for stating the second gasket ring (9) offsets with the outer wall of described sleeve pipe respectively.
2. wellhead hookup according to claim 1, which is characterized in that the concave step includes the first concave step
With the second concave step；
The tilt angle of second concave step is greater than the tilt angle of first concave step；
Second gasket ring (9), the second seal (8), first gasket ring (7) and the first seal (5) are sequentially
It is embedded in first concave step, the cone (3) is embedded in second concave step.
3. wellhead hookup according to claim 1, which is characterized in that the outer diameter of described sleeve pipe box cupling (10) is greater than institute
State the internal diameter of cone (3).
4. wellhead hookup according to claim 1, which is characterized in that the gland (2) and described sleeve pipe box cupling
(10) it is detachably connected.
5. wellhead hookup according to claim 1, which is characterized in that the gland (2) and the shell (4) are removable
Unload connection.
6. wellhead hookup according to claim 1, which is characterized in that shell (4) bottom end offer for and
The bolt hole of casing head flange connection.
7. wellhead hookup according to claim 6, which is characterized in that the bottom end of the shell (4) be also provided with
The compatible steel ring slot of described sleeve pipe head flange flange hole (11).
8. wellhead hookup according to claim 1, which is characterized in that offer pressure communication on the shell (4)
Hole is equipped with pressure gauge on the pressure communication hole.
9. wellhead hookup according to claim 1, which is characterized in that the greasing mouth (6) and the shell (4) can
Dismantling connection.
10. wellhead hookup according to claim 9, which is characterized in that the quantity of the greasing mouth (6) is 2-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821256262.4U CN208830942U (en) | 2018-08-06 | 2018-08-06 | Wellhead hookup |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821256262.4U CN208830942U (en) | 2018-08-06 | 2018-08-06 | Wellhead hookup |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208830942U true CN208830942U (en) | 2019-05-07 |
Family
ID=66308347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821256262.4U Active CN208830942U (en) | 2018-08-06 | 2018-08-06 | Wellhead hookup |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208830942U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110805407A (en) * | 2018-08-06 | 2020-02-18 | 中国石油天然气股份有限公司 | Wellhead suspension device |
-
2018
- 2018-08-06 CN CN201821256262.4U patent/CN208830942U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110805407A (en) * | 2018-08-06 | 2020-02-18 | 中国石油天然气股份有限公司 | Wellhead suspension device |
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