CN112878944A - Novel multi-wellhead suction anchor and using method thereof - Google Patents
Novel multi-wellhead suction anchor and using method thereof Download PDFInfo
- Publication number
- CN112878944A CN112878944A CN202110223230.4A CN202110223230A CN112878944A CN 112878944 A CN112878944 A CN 112878944A CN 202110223230 A CN202110223230 A CN 202110223230A CN 112878944 A CN112878944 A CN 112878944A
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- main cylinder
- novel multi
- suction anchor
- main
- thick bamboo
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- 238000000034 method Methods 0.000 title claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 27
- 239000010959 steel Substances 0.000 claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 18
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 18
- 241001330002 Bambuseae Species 0.000 claims description 18
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 18
- 239000011425 bamboo Substances 0.000 claims description 18
- 239000013535 sea water Substances 0.000 claims description 10
- 239000002689 soil Substances 0.000 claims description 9
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 3
- 238000005553 drilling Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000005086 pumping Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Images
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
-
- 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
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/0007—Equipment or details not covered by groups E21B15/00 - E21B40/00 for underwater installations
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- 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)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention relates to a novel multi-wellhead suction anchor and a using method thereof, belonging to the technical field of deepwater drilling. The suction anchor comprises a main cylinder and an extension steel plate, wherein the main cylinder is a hollow cylinder with an opening at the bottom end, the top end of the main cylinder is provided with the extension steel plate, the extension steel plate is circumferentially distributed along the axis of the main cylinder, a shaft is fixed in the extension steel plate, and the top end of the main cylinder is provided with a water suction port. The invention adjusts the traditional shaft inside to the shaft outside, improves the number of portable shafts, realizes simultaneous operation of multiple wells, improves the operation efficiency, reduces the overall weight, saves the manufacturing cost and ensures the operation safety of hoisting equipment.
Description
Technical Field
The invention relates to a novel multi-wellhead suction anchor and a using method thereof, belonging to the technical field of deepwater drilling.
Background
In the deepwater drilling process, the guarantee of the stability of a wellhead is the key for successful well construction, and the stability of the wellhead is generally guaranteed by using a deepwater suction anchor at present. The suction anchor is generally a cylindrical structure with a closed upper end and an open lower end, a shaft is arranged in the suction anchor, a water outlet reserved on a top plate is connected with a pumping device, the suction anchor firstly sinks into the seabed by self weight to a certain depth to form a closed environment in the process of penetration and sinking, then a water pump at the top is used for pumping water to enable the inside and the outside of the anchor body to form pressure difference, the anchor body continues to sink under the action of the inside and outside pressure difference until the anchor body sinks into the seabed by a specified depth, and the shaft sinks into the seabed along with the suction anchor.
The existing deep water suction anchor well head technology mainly adopts a single-pile multi-well head suction anchor to perform well drilling operation, but the inner space of the single-pile multi-well head suction anchor is limited, the number of sleeved mineshafts is small, the weight is large, and the operation risk of a hoisting device is high.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the novel multi-wellhead suction anchor, which improves the number of the carried wellholes, realizes the simultaneous operation of multiple wells, improves the operation efficiency, reduces the overall weight, saves the manufacturing cost and ensures the operation safety of the hoisting equipment.
The invention also provides a using method of the novel multi-wellhead suction anchor.
The technical scheme of the invention is as follows:
the utility model provides a novel multi-well mouth suction anchor, includes the main section of thick bamboo and extends the steel sheet, and wherein, the main section of thick bamboo is bottom open-ended hollow circular cylinder, and main section of thick bamboo top sets up the extension steel sheet, and the extension steel sheet is the circumference along main section of thick bamboo axis and distributes, extends steel sheet internal fixation pit shaft, and the main section of thick bamboo top sets up the water sucking mouth.
Preferably, the number of the extension steel plates is at least 4, and the specific number is adjusted according to actual operation requirements.
Preferably, set up the fretwork round hole on the extension steel sheet, the pit shaft of easy to assemble.
Preferably, the top end of the main cylinder is provided with a vent valve which communicates the main cylinder with the seawater, so that the water inlet resistance is reduced, and the main cylinder is convenient to install in place quickly.
Preferably, the diameter of the main cylinder is 2.5-3.5m, the diameter of the single-pile multi-wellhead suction anchor is 5-6m, the diameter is reduced by about half, the overall weight of the suction anchor is reduced, and meanwhile, the shaft is changed from an internal shaft to an external shaft, so that the number of the portable shafts is greatly increased, and the operation efficiency is improved.
Preferably, the water suction port is connected with a suction pump, and seawater in the main cylinder is pumped out through the suction pump.
Preferably, the main tube and the extension steel plate are made of hard alloy steel.
The use method of the novel multi-wellhead suction anchor comprises the following operation steps:
(1) the main cylinder penetrates into the seabed soil layer for a certain depth through self weight;
(2) the suction pump sucks the seawater in the main cylinder through the water suction port to generate negative pressure in the main cylinder, the main cylinder continues to penetrate into the seabed soil layer under the action of the negative pressure until the seawater is completely penetrated, and the shaft sinks into the seabed soil layer along with the main cylinder.
The invention has the beneficial effects that:
1. the invention adjusts the traditional shaft inside to the shaft outside, improves the number of portable shafts, realizes simultaneous operation of multiple wells, improves the operation efficiency, reduces the overall weight, saves the manufacturing cost and ensures the operation safety of hoisting equipment.
2. The invention has simple structure and convenient manufacture, and can be quickly applied to the market.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic top view of the present invention;
wherein: 1. a main barrel; 2. a water suction port; 3. a vent valve; 4. hollowing out the round hole; 5. and (3) extending the steel plate.
Detailed Description
The present invention will be further described by way of examples, but not limited thereto, with reference to the accompanying drawings.
Example 1:
as shown in fig. 1-2, this embodiment provides a novel multi-well suction anchor, including a main section of thick bamboo 1 and extension steel sheet 5, wherein, a main section of thick bamboo 1 is the open-ended hollow circular cylinder in bottom, and a main section of thick bamboo 1 top sets up extension steel sheet 5, and extension steel sheet 5 is the circumference along a main section of thick bamboo axis and distributes, extends steel sheet 5 internal fixation pit shaft, and a main section of thick bamboo 1 top sets up water sucking mouth 2.
The number of the extension steel plates 5 is 4.
The hollow round hole 4 is formed in the extension steel plate 5, and a shaft is convenient to install.
The diameter of the main cylinder 1 is 2.5m, the diameter of the single-pile multi-wellhead suction anchor is 5-6m, the diameter is reduced by about half, the overall weight of the suction anchor is reduced, and meanwhile, the shaft is changed from being internally arranged to being externally arranged, so that the number of the portable shafts is greatly increased, and the operation efficiency is improved.
The water suction port 2 is connected with a suction pump, and seawater in the main cylinder is pumped out through the suction pump.
The main cylinder 1 and the extension steel plate 5 are made of hard alloy steel, and the surfaces of the main cylinder and the extension steel plate are subjected to corrosion prevention and rust prevention treatment.
The use method of the novel multi-wellhead suction anchor comprises the following operation steps:
(1) the main cylinder penetrates into the seabed soil layer for a certain depth through self weight;
(2) the suction pump sucks the seawater in the main cylinder through the water suction port to generate negative pressure in the main cylinder, the main cylinder continues to penetrate into the seabed soil layer under the action of the negative pressure until the seawater is completely penetrated, and the shaft sinks into the seabed soil layer along with the main cylinder.
Example 2:
the utility model provides a novel multi-well mouth suction anchor, the structure is as embodiment 1 the difference lies in, 1 top of a main section of thick bamboo sets up breather valve 3, and breather valve 3 reduces into the water resistance with a main section of thick bamboo 1 and sea water intercommunication, makes things convenient for a main section of thick bamboo to install fast and targets in place. The diameter of the main cylinder is 3.5 m.
Claims (8)
1. The utility model provides a novel multi-well mouth suction anchor, its characterized in that, includes the main section of thick bamboo and extends the steel sheet, wherein, the main section of thick bamboo is bottom open-ended hollow circular cylinder, and the main section of thick bamboo top sets up and extends the steel sheet, extends the steel sheet and is the circumference along the main section of thick bamboo axis and distributes, extends steel sheet internal fixation pit shaft, and the main section of thick bamboo top sets up the water sucking mouth.
2. The novel multi-well suction anchor of claim 1, wherein at least 4 of the extension steel plates are provided.
3. The novel multi-well suction anchor of claim 1, wherein the elongated steel plate is provided with hollowed-out circular holes.
4. The novel multi-well suction anchor of claim 1, wherein a vent valve is provided at the top end of the main cylinder.
5. The novel multi-well suction anchor of claim 1, wherein the primary barrel is 2.5-3.5m in diameter.
6. The novel multi-well suction anchor of claim 1, wherein the suction port is connected to a suction pump.
7. The novel multi-well suction anchor of claim 1, wherein the main barrel and the extension steel plate are made of hard alloy steel.
8. The method of using the novel multi-well suction anchor of claim 6, comprising the steps of:
(1) the main cylinder penetrates into the seabed soil layer for a certain depth through self weight;
(2) the suction pump sucks the seawater in the main cylinder through the water suction port to generate negative pressure in the main cylinder, the main cylinder continues to penetrate into the seabed soil layer under the action of the negative pressure until the seawater is completely penetrated, and the shaft sinks into the seabed soil layer along with the main cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110223230.4A CN112878944A (en) | 2021-03-01 | 2021-03-01 | Novel multi-wellhead suction anchor and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110223230.4A CN112878944A (en) | 2021-03-01 | 2021-03-01 | Novel multi-wellhead suction anchor and using method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112878944A true CN112878944A (en) | 2021-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110223230.4A Pending CN112878944A (en) | 2021-03-01 | 2021-03-01 | Novel multi-wellhead suction anchor and using method thereof |
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| Country | Link |
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| CN (1) | CN112878944A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114687700A (en) * | 2022-03-28 | 2022-07-01 | 中国石油大学(华东) | Suction anchor wellhead device suitable for oil gas recovery of deep sea shallow layer multi-gas commingled production accident |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104843146A (en) * | 2015-05-12 | 2015-08-19 | 中国石油大学(华东) | Bionic suction anchor |
| US20200198735A1 (en) * | 2017-09-07 | 2020-06-25 | Equinor Energy As | Marine suction anchor |
| CN111594090A (en) * | 2020-06-17 | 2020-08-28 | 广州海洋地质调查局 | Novel many well heads deep water suction anchor |
| CN111827916A (en) * | 2020-07-31 | 2020-10-27 | 广州海洋地质调查局 | Large deepwater suction anchor with multiple well mouths for pile group |
| WO2021032686A1 (en) * | 2019-08-22 | 2021-02-25 | Fmc Kongsberg Subsea As | Subsea wellhead support system and associated method of installing a subsea wellhead support system |
| CN214403506U (en) * | 2021-03-01 | 2021-10-15 | 中国石油大学(华东) | Novel multi-wellhead suction anchor |
-
2021
- 2021-03-01 CN CN202110223230.4A patent/CN112878944A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104843146A (en) * | 2015-05-12 | 2015-08-19 | 中国石油大学(华东) | Bionic suction anchor |
| US20200198735A1 (en) * | 2017-09-07 | 2020-06-25 | Equinor Energy As | Marine suction anchor |
| WO2021032686A1 (en) * | 2019-08-22 | 2021-02-25 | Fmc Kongsberg Subsea As | Subsea wellhead support system and associated method of installing a subsea wellhead support system |
| CN111594090A (en) * | 2020-06-17 | 2020-08-28 | 广州海洋地质调查局 | Novel many well heads deep water suction anchor |
| CN111827916A (en) * | 2020-07-31 | 2020-10-27 | 广州海洋地质调查局 | Large deepwater suction anchor with multiple well mouths for pile group |
| CN214403506U (en) * | 2021-03-01 | 2021-10-15 | 中国石油大学(华东) | Novel multi-wellhead suction anchor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114687700A (en) * | 2022-03-28 | 2022-07-01 | 中国石油大学(华东) | Suction anchor wellhead device suitable for oil gas recovery of deep sea shallow layer multi-gas commingled production accident |
| CN114687700B (en) * | 2022-03-28 | 2023-09-29 | 中国石油大学(华东) | Suction anchor wellhead device suitable for oil gas recovery of deep sea shallow layer multi-gas combined mining accident |
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