CN109611050A - A kind of dedicated subsea equipment in deep water gas field - Google Patents
A kind of dedicated subsea equipment in deep water gas field Download PDFInfo
- Publication number
- CN109611050A CN109611050A CN201811323331.3A CN201811323331A CN109611050A CN 109611050 A CN109611050 A CN 109611050A CN 201811323331 A CN201811323331 A CN 201811323331A CN 109611050 A CN109611050 A CN 109611050A
- Authority
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- China
- Prior art keywords
- pressure well
- ring
- well head
- load
- low pressure
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Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 230000005465 channeling Effects 0.000 claims description 14
- 239000007937 lozenge Substances 0.000 claims description 4
- 238000010073 coating (rubber) Methods 0.000 claims description 2
- 230000000903 blocking effect Effects 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 4
- XQCFHQBGMWUEMY-ZPUQHVIOSA-N Nitrovin Chemical compound C=1C=C([N+]([O-])=O)OC=1\C=C\C(=NNC(=N)N)\C=C\C1=CC=C([N+]([O-])=O)O1 XQCFHQBGMWUEMY-ZPUQHVIOSA-N 0.000 description 3
- 230000005484 gravity Effects 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 206010016256 fatigue Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/035—Well heads; Setting-up thereof specially adapted for underwater installations
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a kind of dedicated subsea equipment in deep water gas field, including high-pressure well mouth, low pressure well head, be connected to low pressure well head and stretched sheathed tube；The first load-bearing ring is provided on the lateral wall of the high-pressure well mouth, the high-pressure well mouth is overlapped on the first support portion of the low pressure well head inner sidewall by the first load-bearing ring；Pressure retaining ring is provided with above the first load-bearing ring, it is opened up on the radial outside wall for forcing retaining ring fluted, there is gap between the radially inner side wall for forcing retaining ring and the lateral wall of the high-pressure well mouth, the retaining mechanism of an annular is wedged downwards in the gap.By adopting the above technical scheme, high-pressure well mouth, low pressure well head can be locked to together by force, to enhance the connection between high-pressure well mouth, low pressure well head, improves load transmission situation and stress distribution situation, increases the service life of high-pressure well mouth, low pressure well head.
Description
Technical field
The present invention relates to a kind of dedicated subsea equipments in deep water gas field, belong to oil-gas exploration and development technical field.
Background technique
Underwater well head system and other subsequent for being drilled that well operations are closely related, in low pressure well head or underwater well head system
Accident occurs for any one part, all can cause irreversible influence to the exploitation of whole mouth well.Underwater well head system is complete at present
External import is relied on, underwater well head production and Site Service concentration rest in the well head company hand of American-European countries, mainly include
The FMC Corp. in the U.S., GE-VetcoGray company, Cameron company, Drill-Quip company and Norway
AkerSolutions company etc., Foreign Underwater well head supplier there are delivery cycle long (at least 1 year or more), because supply by
The problems such as limitation, restricts China in the exploration and development in deep water field, carries out production domesticization research to underwater well head and service aid
Have become the task of top priority.But the inadaptable domestic operation on the sea requirement of certain designs of import underwater well port system, is being drilled well operations
Land prepare and field operation during, cause land is difficult to install, land transport is difficult, field operation is difficult, there is accident after
The problems such as without solution.
Currently, the China depth of water is more than 500 meters of deepwater work, commonly use well head be pressure rating 10000psi,
The underwater well head of 15000psi, hung between high-pressure well mouth and low pressure well head by gravity, elastic lock ring limit etc. modes be connected
It connects, there are certain intervals between high-pressure well mouth and low pressure well head, can occur slightly to shake during production.On the one hand, China is deep
The more gas fields in water sea area, underwater well head shakes larger, the conventional underwater well head without rigid locking mechanism and is shaking during exploitation
Lower fatiguability is acted on, leads to service life reduction, is unsatisfactory for the needs exploited for a long time；On the other hand, right under the overall situation of low oil price
For subsea fields exploitation projects tens billion of easily, the pressure of cost control is huge.Pass through exploration early period, drillng operation
It is known that gas field payzone pressure is usually less than 10000psi, the subsea equipment of 10000psi can meet exploitation needs.If
Using the underwater well head system, subsea production tree system, subsea manifold system of pressure rating 15000psi, though reliability is higher,
But expensive, pole is unfavorable for the deepwater development status under low oil price.
Summary of the invention
Therefore, the purpose of the present invention is to provide a kind of safe and reliable underwater well heads suitable for the 500-3000 meters of depth of water
Device.
To achieve the goals above, a kind of dedicated subsea equipment in deep water gas field of the invention, including it is high-pressure well mouth, low
Kill-job mouth, be connected to low pressure well head and stretched sheathed tube；The first load-bearing ring, institute are provided on the lateral wall of the high-pressure well mouth
High-pressure well mouth is stated to be overlapped on by the first load-bearing ring on the first support portion of the low pressure well head inner sidewall；In first load-bearing
It is provided with pressure retaining ring above ring, fluted, the pressure locking is opened up on the radial outside wall for forcing retaining ring
There is gap between the radially inner side wall of ring and the lateral wall of the high-pressure well mouth, described in the retaining mechanism of an annular is wedged downwards
So as to making the pressure lock circumferential radial outside expansion in gap, be provided on the inner sidewall of the low pressure well head with
The fin that the groove matches, when circumferential radial outside expansion is locked in the pressure, the fin is able to enter the groove
It is interior.
The lateral wall lower end of the retaining mechanism is provided with lozenges.
Anti-gas channeling gasket ring is provided on the lateral wall of the first load-bearing ring.
It is provided with centering ring on the lower outside wall of the high-pressure well mouth, is arranged on the inner sidewall of the low pressure well head
There is directing shoulder, the centering ring is supported on the directing shoulder.
The dedicated subsea equipment in deep water gas field further includes anti-gas channeling mud pad, on the lateral wall of the stretched sheathed tube
It is provided with the second load-bearing ring, the second load-bearing ring is overlapped on the second support portion of the anti-gas channeling mud pad.
The second anti-gas channeling gasket ring is provided on the second load-bearing ring.
By adopting the above technical scheme, the dedicated subsea equipment in deep water gas field of the invention, the beneficial effect is that:
1, safe and reliable.On the one hand, compared to hung between high-pressure well mouth and low pressure well head by gravity, elastic lock ring limit
Etc. the conventional subsea wellhead assembly that is connected of modes, subsea equipment of the present invention pressure lock is provided with outside high-pressure well mouth
High-pressure well mouth, low pressure well head can be locked to together by tight ring by force, to enhance the connection between high-pressure well mouth, low pressure well head,
Improve load transmission situation and stress distribution situation, increases the service life of high-pressure well mouth, low pressure well head；On the other hand, in high-pressure well
Designing between mouth, low pressure well head and between mud pad, low pressure well head has anti-gas channeling gasket ring, prevents gas accumulation well head under water
Device, subsea production tree, subsea blowout preventer are formed about hydrate, influence the movement of underwater well head and preventer.
2, economy is strong.Underwater well head system, subsea production tree system, subaqueous pipe according to pressure rating 15000psi
Remittance system, though reliability is higher, and it is expensive.And gas field payzone pressure is usually less than 10000psi, 10000psi's is underwater
Wellhead assembly can meet common exploitation needs, use the underwater well head system of pressure rating 10000psi, submerged production
Tree system, subsea manifold system, there is huge economy, and the present invention improves the underwater well of 10000psi by simple structure
The reliability of mouth device, while price is low more than the underwater well head system of 15000psi.
3, adaptable.It can select to weld different size casings below low pressure well head according to operation needs；Selection peace
Dress does not install mud pad；Pressure retaining ring is installed on high-pressure well mouth or is not installed in selection；Selection is below high-pressure well mouth
Weld different size casings.It is combined with each other by different mode, to meet different job requirements.
Detailed description of the invention
Fig. 1 is the dedicated subsea equipment mounting structure schematic diagram in deep water gas field of the invention.
Fig. 2 is the top view of Fig. 1.
Fig. 3 is the portion the A partial enlarged view in Fig. 1.
Fig. 4 is that high-pressure well mouth does not install the structural schematic diagram for forcing retaining ring.
Fig. 5 is that retaining ring is forced to be mounted on the structural schematic diagram on the lateral wall of high-pressure well mouth.
Fig. 6 is the structural schematic diagram of low pressure well head.
Specific embodiment
Below by way of the drawings and specific embodiments, the present invention is described in further detail.
As shown in figs 1 to 6, a kind of dedicated subsea equipment in deep water gas field of the invention, including high-pressure well mouth 1, low pressure
Well head 2, the stretched sheathed tube 3 for being connected to low pressure well head 2, anti-gas channeling mud pad 4.
The first load-bearing ring 11 is provided on the lateral wall of the high-pressure well mouth 1, the high-pressure well mouth 1 passes through the first load-bearing
Ring 11 is overlapped on the first support portion 21 of 2 inner sidewall of low pressure well head.
It is provided in the top of the first load-bearing ring 11 and forces retaining ring 5, the radial outside wall for forcing retaining ring 5
On open up fluted 51, have gap between the radially inner side wall for forcing retaining ring 5 and the lateral wall of the high-pressure well mouth
100, the retaining mechanism 6 of an annular is wedged downwards in the gap 100 so as to making the pressure retaining ring 5 to radial outside
Expansion, is provided with the fin 22 matched with the groove 51 on the inner sidewall of the low pressure well head 2, when the pressure is locked
Ring 5 is able to enter in the groove 51 to fin 22 described when radial outside expansion, can be by force by high-pressure well mouth 1, low pressure well
Mouth 2 is locked to together, to enhance the connection between high-pressure well mouth 1, low pressure well head 2, improves load transmission situation and stress distribution
Situation increases the service life of high-pressure well mouth 1, low pressure well head 2.
The lateral wall lower end of the retaining mechanism 6 is provided with lozenges 61, when retaining mechanism 6 moves down, passes through
Lozenges 61 is set, can relatively easily be entered in the gap 100.
It is provided with centering ring 12 on the lower outside wall of the high-pressure well mouth 1, on the inner sidewall of the low pressure well head 2
It is provided with directing shoulder 23, the centering ring 12 is supported on the directing shoulder 23.
The second load-bearing ring 31 is provided on the lateral wall of the stretched sheathed tube 3, the second load-bearing ring 31 is overlapped on institute
It states on the second support portion 41 of anti-gas channeling mud pad 4.
Anti-gas channeling gasket ring 13 and elastic spacing ring 14, the bullet are provided on the lateral wall of the first load-bearing ring 11
Be provided with inclined-plane 141 on the lateral wall of property stop collar, be provided with shoulder 24 on the inner sidewall of the low pressure well head, when installation with
Moving down for the high-pressure well mouth 1, the elastic spacing ring 14 due to its lateral wall withstand on the inner sidewall of low pressure well head 2 from
And shunk to radially inner side, when elastic spacing ring 14 is moved to shoulder 24, the elastic spacing ring loses 2 inside of low pressure well head
The extruding of wall to radial outside to expand, to be blocked by shoulder 24.Anti-gas channeling is provided on second support portion 41
Rubber coating.Design has anti-gas channeling gasket ring between high-pressure well mouth, low pressure well head and between mud pad, low pressure well head, prevents day
Right gas is gathered in subsea equipment, subsea production tree, subsea blowout preventer and is formed about hydrate, influences underwater well head and blowout prevention
The movement of device.
Gas field payzone pressure is usually less than 10000psi, according to the underwater well head system of pressure rating 15000psi, water
Lower production tree system, subsea manifold system, though reliability is higher, and it is expensive.And the subsea equipment of 10000psi is just
It can satisfy common exploitation needs, use the underwater well head system of pressure rating 10000psi, subsea production tree system, underwater
Manifold system, there is a huge economy, the present invention by simple structure improve 10000psi subsea equipment can
By property, while price is low more than the underwater well head system of 15000psi.
Obviously, above-described embodiment is only intended to clearly illustrate example, and does not limit the embodiments.For
For those of ordinary skill in the art, other various forms of variations or change can also be made on the basis of the above description
It is dynamic.There is no necessity and possibility to exhaust all the enbodiments.And obvious variation extended from this or change
It moves still within the protection scope of the invention.
Claims (8)
1. a kind of dedicated subsea equipment in deep water gas field, is made of device noumenon, it is characterised in that: including high-pressure well mouth, low
Kill-job mouth, be connected to low pressure well head and stretched sheathed tube；The first load-bearing ring, institute are provided on the lateral wall of the high-pressure well mouth
High-pressure well mouth is stated to be overlapped on by the first load-bearing ring on the first support portion of the low pressure well head inner sidewall；In first load-bearing
It is provided with pressure retaining ring above ring, fluted, the pressure locking is opened up on the radial outside wall for forcing retaining ring
There is gap between the radially inner side wall of ring and the lateral wall of the high-pressure well mouth, described in the retaining mechanism of an annular is wedged downwards
So as to making the pressure lock circumferential radial outside expansion in gap, be provided on the inner sidewall of the low pressure well head with
The fin that the groove matches, when circumferential radial outside expansion is locked in the pressure, the fin is able to enter the groove
It is interior.
2. the dedicated subsea equipment in deep water gas field as described in claim 1, it is characterised in that: in the outer of the retaining mechanism
Side wall lower ends are provided with lozenges.
3. the dedicated subsea equipment in deep water gas field as described in claim 1, it is characterised in that: in the first load-bearing ring
Anti-gas channeling gasket ring is provided on lateral wall.
4. the dedicated subsea equipment in deep water gas field as described in claim 1, it is characterised in that: under the high-pressure well mouth
It is provided with centering ring on portion's lateral wall, directing shoulder is provided on the inner sidewall of the low pressure well head, the centering ring is supported in
On the directing shoulder.
5. the dedicated subsea equipment in deep water gas field according to any one of claims 1-4, it is characterised in that: the deep water gas
The dedicated subsea equipment in field further includes anti-gas channeling mud pad, and the second load-bearing ring is provided on the lateral wall of the stretched sheathed tube,
The second load-bearing ring is overlapped on the second support portion of the anti-gas channeling mud pad.
6. the dedicated subsea equipment in deep water gas field as claimed in claim 5, it is characterised in that: on second support portion
It is provided with anti-gas channeling rubber coating.
7. the dedicated subsea equipment in deep water gas field according to any one of claims 1-4, it is characterised in that: described first
It is provided with elastic spacing ring on the lateral wall of load-bearing ring, is provided on the inner sidewall of the low pressure well head for blocking the bullet
The shoulder of property stop collar.
8. the dedicated subsea equipment in deep water gas field as claimed in claim 7, it is characterised in that: outside the elastic spacing ring
Inclined-plane is provided on side wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811323331.3A CN109611050A (en) | 2018-11-08 | 2018-11-08 | A kind of dedicated subsea equipment in deep water gas field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811323331.3A CN109611050A (en) | 2018-11-08 | 2018-11-08 | A kind of dedicated subsea equipment in deep water gas field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109611050A true CN109611050A (en) | 2019-04-12 |
Family
ID=66003235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811323331.3A Pending CN109611050A (en) | 2018-11-08 | 2018-11-08 | A kind of dedicated subsea equipment in deep water gas field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109611050A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111219161A (en) * | 2020-04-17 | 2020-06-02 | 上海临希智能科技有限公司 | Wellhead system for underwater resource exploitation |
| CN113605853A (en) * | 2021-08-27 | 2021-11-05 | 中海石油(中国)有限公司 | Low-pressure wellhead capable of being connected back |
| CN114233232A (en) * | 2021-12-06 | 2022-03-25 | 中海石油(中国)有限公司 | High-pressure wellhead based on self-elevating drilling platform operation and matched tool thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111219161A (en) * | 2020-04-17 | 2020-06-02 | 上海临希智能科技有限公司 | Wellhead system for underwater resource exploitation |
| CN113605853A (en) * | 2021-08-27 | 2021-11-05 | 中海石油(中国)有限公司 | Low-pressure wellhead capable of being connected back |
| CN113605853B (en) * | 2021-08-27 | 2023-02-24 | 中海石油(中国)有限公司 | Low-pressure wellhead capable of being connected back |
| CN114233232A (en) * | 2021-12-06 | 2022-03-25 | 中海石油(中国)有限公司 | High-pressure wellhead based on self-elevating drilling platform operation and matched tool thereof |
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