CN112727408A - Installation method of oil-gas production dry-type protection structure located under seabed mud surface - Google Patents
Installation method of oil-gas production dry-type protection structure located under seabed mud surface Download PDFInfo
- Publication number
- CN112727408A CN112727408A CN202011413657.2A CN202011413657A CN112727408A CN 112727408 A CN112727408 A CN 112727408A CN 202011413657 A CN202011413657 A CN 202011413657A CN 112727408 A CN112727408 A CN 112727408A
- Authority
- CN
- China
- Prior art keywords
- steel cylinder
- dry
- cylinder
- mud surface
- caisson
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000009434 installation Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 24
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 41
- 239000010959 steel Substances 0.000 claims abstract description 41
- 230000001681 protective effect Effects 0.000 claims abstract description 12
- 238000005553 drilling Methods 0.000 claims abstract description 9
- 241000191291 Abies alba Species 0.000 claims abstract description 5
- 238000010276 construction Methods 0.000 claims abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 239000004575 stone Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002689 soil Substances 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/18—Making embankments, e.g. dikes, dams
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D23/00—Caissons; Construction or placing of caissons
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
- E02D7/18—Placing by vibrating
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
- E21B43/013—Connecting a production flow line to an underwater well head
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Paleontology (AREA)
- Structural Engineering (AREA)
- Geology (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses an installation method of an oil-gas production dry-type protection structure located under the mud surface of a seabed. The installation method comprises the following steps: excavating a foundation pit at a construction position according to the size of the dry type protective structure for oil and gas production; placing the steel cylinder in the foundation pit and vibrating and sinking the steel cylinder to be below the mud surface; removing the upper cylinder of the steel cylinder to expose the mud surface in the cylinder; excavating in the steel cylinder to a preset depth below the mud surface; installing a riser, a wellhead head and a protective cover; paving a broken stone cushion layer at the bottom of the steel cylinder; installing a prefabricated dry caisson in the steel cylinder; installing a Christmas tree to complete the connection of the pipe cable in the dry caisson; completing the drilling and completion operation; the connection between the dry caisson and the external pipe cable is completed; dismantling the middle cylinder of the steel cylinder; and backfilling the foundation pit and burying the dry caisson below the mud surface. The installation method is simple to operate, saves the installation cost, is beneficial to improving the integrity of the oil-gas production dry-type protection structure, and provides a new method for installing the oil-gas production dry-type protection structure under the seabed mud surface.
Description
Technical Field
The invention relates to an installation method of an oil-gas production dry-type protection structure located under the mud surface of a seabed, and belongs to the technical field of ocean engineering.
Background
In ocean engineering, subsea production systems have a wide range of applications due to their significant economic and technical advantages. The underwater production system is generally positioned above a mud surface, and an underwater production facility is protected by adopting a firm enough foundation and a protection structure through which a fishing net can slide, so that the harmony and the coexistence of fishery and oil gas production are realized. The installation method of the protective structure above the mud surface is that the anti-sinking plate is installed firstly and then the upper protective structure is installed. However, in the navigation area, the safety of navigation and underwater production facilities is considered, an underwater production system needs to be moved below the mud surface of the seabed, and the installation mode of the existing underwater protection structure cannot meet the installation requirement.
Disclosure of Invention
The invention aims to provide an installation method of an oil and gas production dry type protection structure located under the mud surface of a seabed, which has the characteristic of high installation efficiency.
The invention provides an installation method of an oil and gas production dry type protection structure positioned below a seabed mud surface, which comprises the following steps:
(1) excavating a foundation pit at a construction position according to the size of the dry type protective structure for oil and gas production;
(2) placing a steel cylinder in the foundation pit and vibrating and sinking the steel cylinder below a mud surface, wherein the steel cylinder comprises a lower cylinder, a middle cylinder and an upper cylinder, the upper end of the lower cylinder is positioned in the foundation pit, and the height of the lower cylinder is not less than that of the dry caisson;
(3) removing the upper cylinder of the steel cylinder to expose the mud surface of the steel cylinder;
(4) excavating in the steel cylinder to a preset depth below a mud surface;
(5) installing a riser, a wellhead head and a protective cover;
(6) paving a gravel cushion layer at the bottom of the steel cylinder;
(7) installing the prefabricated dry caisson in the steel cylinder;
(8) installing a Christmas tree to complete the connection of the pipe cable in the dry caisson;
(9) the drilling ship is in place to complete the drilling and completion operation;
(10) completing the connection of the dry caisson and an external pipe cable;
(9) removing the middle cylinder of the steel cylinder;
(10) and backfilling the foundation pit and burying the dry caisson below the mud surface.
In the above installation method, in the step (2), the steel cylinder is vibrated and sunk to a depth below the mud surface which is not less than the height of the dry caisson.
In the above installation method, in the step (4), the predetermined depth is not less than the height of the dry caisson.
In the mounting method, in the step (6), the height of the gravel cushion layer is 0.8-1.2 m.
In the above installation method, in the step (7), the steel cylinder and the caisson are connected by grouting.
The installation method of the invention has the following beneficial effects:
the installation method provided by the invention is simple to operate, saves the installation cost, and is beneficial to improving the integrity of the oil-gas production dry-type protection structure, so that a new method is provided for installation of the oil-gas production dry-type protection structure under the seabed mud surface in the field of installation of the oil-gas production protection structure.
Drawings
Fig. 1 is a schematic diagram of excavation of a foundation pit and vibration sinking of a steel cylinder.
Fig. 2 is a schematic upper cylinder removal of a steel cylinder.
Fig. 3 is a schematic view of the steel cylinder being excavated to a predetermined depth below the mud surface.
Figure 4 is a schematic view of the installation of the riser, wellhead head and shield.
FIG. 5 is a schematic view of a gravel cushion layer laid on the bottom of the foundation pit.
Fig. 6 is a schematic diagram of the connection of the cast concrete and the steel cylinder for the installation of the prefabricated dry caisson.
Fig. 7 is a schematic diagram of the installation of a christmas tree to complete the umbilical connection inside the caisson.
FIG. 8 is a schematic illustration of the drill ship in position to complete the drilling and completion operation.
Fig. 9 is a schematic view of the completion of the caisson with external umbilical connection.
FIG. 10 is a schematic drawing with the second section of steel cylinder removed.
Fig. 11 is a schematic view of backfilling soil burying the caisson below the mud surface.
Detailed Description
The experimental procedures used in the following examples are all conventional procedures unless otherwise specified.
Materials, reagents and the like used in the following examples are commercially available unless otherwise specified.
The installation process of the invention is explained with reference to the accompanying drawings:
(1) excavating a foundation pit at a construction position by using a dredger, wherein the size of the foundation pit is determined by the size of a protective structure, as shown in figure 1;
(2) sinking the steel cylinder to a preset depth below the mud surface through vibration sinking, and taking off the uppermost section of the steel cylinder to expose the steel cylinder out of the mud surface, as shown in figures 1 and 2;
(3) excavating into the steel cylinder to a predetermined depth below the mud surface, as shown in fig. 3;
(4) the drilling vessel is equipped with a riser, a wellhead head and a protective cover, as shown in fig. 4;
(5) paving a broken stone cushion layer at the bottom of the foundation pit, wherein the height can be 0.8-1.2 m as shown in figure 5;
(6) taking down the well head protective cover, installing the prefabricated dry caisson, and pouring concrete to be connected with the steel cylinder, as shown in figure 6;
(7) installing a Christmas tree to complete the pipe-cable connection in the caisson, as shown in FIG. 7;
(8) the drilling ship is in position to complete the drilling and completion operation, as shown in fig. 8;
(9) completing the caisson and external umbilical connection, as shown in fig. 9;
(10) removing the middle cylinder of the steel cylinder so that its top is at the desired depth below the mud surface, as shown in fig. 10;
(11) backfill buries the caisson below the mud level, as shown in fig. 11.
The steel cylinder adopted by the method comprises three sections: the upper cylinder, the middle cylinder and the lower cylinder are connected through flanges, so that the upper cylinder, the middle cylinder and the lower cylinder are convenient to disassemble, and the height of the lower cylinder is not less than that of the caisson.
Claims (5)
1. An installation method of an oil and gas production dry type protective structure located below a seabed mud surface comprises the following steps:
(1) excavating a foundation pit at a construction position according to the size of the dry type protective structure for oil and gas production;
(2) placing a steel cylinder in the foundation pit and vibrating and sinking the steel cylinder below a mud surface, wherein the steel cylinder comprises a lower cylinder, a middle cylinder and an upper cylinder, the upper end of the lower cylinder is positioned in the foundation pit, and the height of the lower cylinder is not less than that of the dry caisson;
(3) removing the upper cylinder of the steel cylinder to expose the mud surface of the steel cylinder;
(4) excavating in the steel cylinder to a preset depth below a mud surface;
(5) installing a riser, a wellhead head and a protective cover;
(6) paving a gravel cushion layer at the bottom of the steel cylinder;
(7) installing the prefabricated dry caisson in the steel cylinder;
(8) installing a Christmas tree to complete the connection of the pipe cable in the dry caisson;
(9) the drilling ship is in place to complete the drilling and completion operation;
(10) completing the connection of the dry caisson and an external pipe cable;
(9) removing the middle cylinder of the steel cylinder;
(10) and backfilling the foundation pit and burying the dry caisson below the mud surface.
2. The mounting method according to claim 1, wherein: and (2) vibrating and sinking the steel cylinder to a depth below a mud surface which is not less than the height of the dry caisson.
3. The mounting method according to claim 1 or 2, wherein: in the step (4), the predetermined depth is not less than the height of the dry caisson.
4. The mounting method according to any one of claims 1 to 3, wherein: in the step (6), the height of the gravel cushion layer is 0.8-1.2 m.
5. The mounting method according to any one of claims 1 to 4, wherein: and (7) connecting the steel cylinder and the caisson by grouting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011413657.2A CN112727408A (en) | 2020-12-03 | 2020-12-03 | Installation method of oil-gas production dry-type protection structure located under seabed mud surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011413657.2A CN112727408A (en) | 2020-12-03 | 2020-12-03 | Installation method of oil-gas production dry-type protection structure located under seabed mud surface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112727408A true CN112727408A (en) | 2021-04-30 |
Family
ID=75598217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011413657.2A Pending CN112727408A (en) | 2020-12-03 | 2020-12-03 | Installation method of oil-gas production dry-type protection structure located under seabed mud surface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112727408A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113404050A (en) * | 2021-05-27 | 2021-09-17 | 中海石油(中国)有限公司 | Installation method of integrated steel cylinder underwater protection system |
| CN113818487A (en) * | 2021-07-15 | 2021-12-21 | 海洋石油工程股份有限公司 | Integral installation method for shallow water steel cylinder underwater platform |
| CN113898324A (en) * | 2021-09-30 | 2022-01-07 | 中海石油(中国)有限公司 | Protection system and method for underwater production under seabed mud surface |
| CN113970012A (en) * | 2021-11-01 | 2022-01-25 | 中海石油(中国)有限公司 | Fixing pin fixing method for underwater production manifold in steel cylinder under seabed mud surface |
| CN113970013A (en) * | 2021-11-01 | 2022-01-25 | 中海石油(中国)有限公司 | Method for fixing stay bar of underwater production manifold in steel cylinder under seabed mud surface |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1200759A (en) * | 1982-12-08 | 1986-02-18 | Peter R. Gibb | Subsea caisson |
| CN103397871A (en) * | 2013-08-14 | 2013-11-20 | 大连理工大学 | Dry-type Christmas tree based ultra-deepwater oil and gas development system and mounting method thereof |
| US20150299974A1 (en) * | 2012-12-07 | 2015-10-22 | Adel H. Younan | Suction Caisson with Weakened Section and Method for Installing the Same |
| CN105003232A (en) * | 2015-07-23 | 2015-10-28 | 大连理工大学 | Ultra-deep marine oil and gas dry type production system, installing method of ultra-deep marine oil and gas dry type production system and evacuating method of ultra-deep marine oil and gas dry type production system |
| CN205857220U (en) * | 2016-06-14 | 2017-01-04 | 中国建筑第八工程局有限公司 | Blinding layer structure under level of ground water |
| CN108661608A (en) * | 2018-06-07 | 2018-10-16 | 中海油能源发展股份有限公司 | A kind of underwater dry-type extracting device of oil suitable for shallow water oil-gas field development |
-
2020
- 2020-12-03 CN CN202011413657.2A patent/CN112727408A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1200759A (en) * | 1982-12-08 | 1986-02-18 | Peter R. Gibb | Subsea caisson |
| US20150299974A1 (en) * | 2012-12-07 | 2015-10-22 | Adel H. Younan | Suction Caisson with Weakened Section and Method for Installing the Same |
| CN103397871A (en) * | 2013-08-14 | 2013-11-20 | 大连理工大学 | Dry-type Christmas tree based ultra-deepwater oil and gas development system and mounting method thereof |
| CN105003232A (en) * | 2015-07-23 | 2015-10-28 | 大连理工大学 | Ultra-deep marine oil and gas dry type production system, installing method of ultra-deep marine oil and gas dry type production system and evacuating method of ultra-deep marine oil and gas dry type production system |
| CN205857220U (en) * | 2016-06-14 | 2017-01-04 | 中国建筑第八工程局有限公司 | Blinding layer structure under level of ground water |
| CN108661608A (en) * | 2018-06-07 | 2018-10-16 | 中海油能源发展股份有限公司 | A kind of underwater dry-type extracting device of oil suitable for shallow water oil-gas field development |
Non-Patent Citations (1)
| Title |
|---|
| 李勇 等: "浅水油气田开发水下干式采油装置", 《中国海洋平台》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113404050A (en) * | 2021-05-27 | 2021-09-17 | 中海石油(中国)有限公司 | Installation method of integrated steel cylinder underwater protection system |
| CN113818487A (en) * | 2021-07-15 | 2021-12-21 | 海洋石油工程股份有限公司 | Integral installation method for shallow water steel cylinder underwater platform |
| CN113898324A (en) * | 2021-09-30 | 2022-01-07 | 中海石油(中国)有限公司 | Protection system and method for underwater production under seabed mud surface |
| CN113898324B (en) * | 2021-09-30 | 2023-11-14 | 中海石油(中国)有限公司 | Protection system and method for underwater production below seabed mud surface |
| CN113970012A (en) * | 2021-11-01 | 2022-01-25 | 中海石油(中国)有限公司 | Fixing pin fixing method for underwater production manifold in steel cylinder under seabed mud surface |
| CN113970013A (en) * | 2021-11-01 | 2022-01-25 | 中海石油(中国)有限公司 | Method for fixing stay bar of underwater production manifold in steel cylinder under seabed mud surface |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112727408A (en) | Installation method of oil-gas production dry-type protection structure located under seabed mud surface | |
| CN112502658A (en) | Installation method of oil gas production wet type protection structure located under seabed mud surface | |
| CN109898520B (en) | Wall-sinking construction method | |
| CN103726495B (en) | Coastal waters deep foundation pit supporting structure and construction method thereof | |
| KR101211811B1 (en) | Cast in concrete pile With precast type Caisson | |
| CN110820765A (en) | Prefabricated enclosure structure for narrow deep foundation pit and construction method | |
| CN110219359A (en) | A kind of Submersed type inspection well and its construction method | |
| CN107653878A (en) | Cast-in-situ bored pile is reusable to be longitudinally separated formula steel pile casting construction | |
| CN105714748A (en) | Excavating construction method for surge shaft in gravel and sandy soil layer | |
| US4815894A (en) | Construction and use of subsea bore holes | |
| CN211646415U (en) | Prefabricated enclosure structure for narrow deep foundation pit | |
| CN117738192A (en) | Construction method combining deep well shallow excavation and open caisson method | |
| CN111851546A (en) | Construction method for sealing precipitation of drainage well in deep foundation pit construction | |
| CN113404050A (en) | Installation method of integrated steel cylinder underwater protection system | |
| CN115614542B (en) | Pipe jacking construction method taking existing foundation pit in water as starting point | |
| CN102021912A (en) | Method for constructing special shaped deepwater cofferdams on steep rocky riverbeds | |
| CN210216519U (en) | Submarine pipeline landing section interval type soil body liquefaction resistance improving device | |
| CN201883413U (en) | Combined concrete rectangular open caisson harbor basin | |
| CN110258659B (en) | Submarine pipeline landing section interval type soil liquefaction resistance improving device and method | |
| CN214170540U (en) | Suspension sinking shaft structure | |
| CN210395398U (en) | Narrow space pile extension reinforced structure | |
| EA004841B1 (en) | A method for installing submerged oil and gas wells, and apparatus for the same | |
| CN214738266U (en) | Vertical jacking implementation structure in underwater tunnel suitable for hard stratum | |
| CN203247606U (en) | Construction structure for sewage pipe and utility tunnel of deep sludge foundation to penetrate through center trench | |
| Cashman et al. | Groundwater Control for Tunnelling Projects |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210430 |