CN113970012A - Fixing pin fixing method for underwater production manifold in steel cylinder under seabed mud surface - Google Patents
Fixing pin fixing method for underwater production manifold in steel cylinder under seabed mud surface Download PDFInfo
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- CN113970012A CN113970012A CN202111281484.8A CN202111281484A CN113970012A CN 113970012 A CN113970012 A CN 113970012A CN 202111281484 A CN202111281484 A CN 202111281484A CN 113970012 A CN113970012 A CN 113970012A
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- Prior art keywords
- production manifold
- fixing
- fixing pin
- steel cylinder
- pin
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/12—Laying or reclaiming pipes on or under water
- F16L1/16—Laying or reclaiming pipes on or under water on the bottom
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/06—Placing concrete under water
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/52—Submerged foundations, i.e. submerged in open water
- E02D27/525—Submerged foundations, i.e. submerged in open water using elements penetrating the underwater ground
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/12—Laying or reclaiming pipes on or under water
- F16L1/20—Accessories therefor, e.g. floats or weights
- F16L1/201—Anchor rods
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Mechanical Engineering (AREA)
- Foundations (AREA)
Abstract
The invention discloses a fixing pin fixing method for an underwater production manifold in a steel cylinder under a seabed mud surface, which comprises the following steps: constructing a bearing foundation of the underwater production manifold; setting a preformed hole; the production pipe is gathered in water and positioned; chiseling a mounting hole of a fixing pin; and installing the fixing pin. According to the fixing pin fixing method disclosed by the invention, after the underwater production manifold is in place, the hole is formed on the concrete foundation bearing the underwater production manifold, and the fixing pin is installed, so that the underwater production manifold can be fixed on the concrete foundation, and is not limited by the in-place position of the underwater production manifold. The method disclosed by the invention is convenient to construct, low in manufacturing cost, capable of meeting the fixing requirement of the underwater production manifold in the steel cylinder under the mud surface of the sea bed, is an economical and efficient fixing method, is suitable for fixing the production manifold in the underwater steel cylinder in the navigation area, and has wide application prospect in oil and gas development engineering in the Bohai sea navigation area.
Description
Technical Field
The invention relates to the field of ocean engineering development, in particular to a fixing pin fixing method for an underwater production manifold in a steel cylinder under a seabed mud surface.
Background
In a Bohai sea navigation area, in order to guarantee navigation safety, a traffic department does not allow an ocean engineering development facility higher than a seabed mud surface to be established in the area. Therefore, the development facility needs to be provided with a steel cylinder protection facility which is positioned below the mud surface and is used for loading the underwater production manifold, so that the collision between the development facility and the ship on the channel is avoided, the interference to the channel is reduced, and the development of oil and gas resources in the navigation area is realized. When the steel cylinder protective facility is used, due to the limitation of installation accuracy, the actual in-place position of the underwater production manifold has certain uncertainty, so that the fixing method of the underwater production manifold needs to have the capability of adjusting according to the actual in-place position of the underwater production manifold while ensuring the fixing stability.
Disclosure of Invention
The invention aims to provide a fixing pin fixing method for an underwater production manifold in a steel cylinder under a seabed mud surface, which is used for solving the problem that the underwater production manifold cannot be adjusted according to the actual in-place position of the underwater production manifold while the fixing stability of the underwater production manifold is ensured.
The invention provides a fixing pin fixing method for an underwater production manifold in a steel cylinder under a seabed mud surface, which comprises the following steps:
carrying out foundation construction on the underwater production manifold: pouring concrete to the bottom in the steel cylinder and leveling to form a concrete foundation;
setting a prepared hole: the bottom of the production manifold is provided with an anti-sinking plate, and at least four preformed holes are preset in the anti-sinking plate of the production manifold;
the production pipe is gathered in water and positioned: hoisting a production manifold to enter water, placing the production manifold on the concrete foundation to form an underwater production manifold, and determining the actual in-place position of the underwater production manifold;
chiseling a mounting hole of a fixing pin: according to the actual in-place position of the underwater production manifold, respectively chiseling mounting holes into the concrete foundation one by one along the reserved holes, wherein each reserved hole and the corresponding mounting hole form a long hole which penetrates through each other;
installing a fixing pin: and according to the requirement that a fixing pin is installed on each long hole which penetrates through each other, installing the fixing pin and injecting cement slurry into the reserved hole.
Preferably, in the step of providing the preformed hole, the inner diameter of the preformed hole is slightly larger than the outer diameter of the fixing pin, and the upper portion of the preformed hole is flared outwards.
Preferably, during said step of bringing the production tubing into water and in place, a diver is required to observe the bringing of the production tubing into water and in place in the vicinity of the steel cylinder.
Preferably, the drilling of the mounting hole of the fixing pin is manually performed, and a diver uses a cutting device to remove concrete on the concrete foundation opposite to the prepared hole.
Preferably, the mounting and fixing pin specifically comprises the steps of:
step S51: a diver inserts a fixing pin into the preformed hole, and the fixing pin penetrates through the preformed hole until extending into the mounting hole;
step S52: respectively injecting cement slurry into the preformed holes, wherein the cement slurry flows into the mounting holes along the preformed holes and gradually diffuses from bottom to top until the cement slurry is filled in all the selected preformed holes;
step S53: static a period of time, treat the grout sclerosis, the fixed pin is wrapped up by the grout of sclerosis, the production manifold passes through under water the fixed pin is fixed on the concrete basis.
Preferably, in the step S53, the upper portion of the fixing pin is fixedly connected to the underwater production manifold through hardened cement paste, and the lower portion of the fixing pin is fixedly connected to the concrete foundation through hardened cement paste, so that the underwater production manifold is anchored to the concrete foundation through the fixing pin.
Compared with the prior art, the invention has the beneficial effects that:
the invention discloses a fixing pin fixing method for an underwater production manifold in a steel cylinder under a seabed mud surface. The method disclosed by the invention is convenient to construct, low in manufacturing cost and simple in operation process, and reduces the installation difficulty; a device does not need to be arranged on the steel cylinder, so that the influence on the vibration sinking and the structural strength of the steel cylinder is avoided; the method can meet the fixing requirement of the underwater production manifold in the steel cylinder under the mud surface of the sea bed, is an economical and efficient fixing method, is suitable for fixing the production manifold in the underwater steel cylinder in the navigation area, and has wide application prospect in oil and gas development engineering in the Bohai sea navigation area.
Drawings
FIG. 1 is a side view of a steel cylinder with a subsea production manifold in place as provided in example 1 of the present invention;
FIG. 2 is a schematic view of a prepared hole and a cement hole provided in example 1 of the present invention;
fig. 3 is a schematic view of the installation of the fixing pin provided in embodiment 1 of the present invention;
fig. 4 is a schematic view of the fixing pin of embodiment 1 of the present invention being wrapped with hardened cement slurry.
Detailed Description
The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Example 1
Embodiment 1 provides a fixing pin fixing method of a subsea production manifold in a steel cylinder located below a mud surface of a seabed, the fixing pin fixing method comprising the steps of:
step S1: bearing foundation construction of underwater production manifold
Concrete is poured and leveled to the bottom inside the steel cylinder 1 to form a concrete foundation 100, which is used as a load-bearing foundation for the subsea production manifold 2, as shown in fig. 1.
In order to ensure the levelness of the installation of the subsea production manifold 2, leveling is performed after the concrete is poured.
Step S2: setting a prepared hole
The bottom of the production manifold is provided with an anti-sinking plate, and at least four preformed holes 3 are preset on the anti-sinking plate of the production manifold;
specifically, the inside diameter of the prepared hole 3 is slightly larger than the outside diameter of the fixing pin 5. Preferably, the upper part of the preformed hole 3 is flared outwards.
Step S3: the production pipe is gathered into water and put in place
And hoisting the production manifold by a floating crane, introducing water into the production manifold, placing the production manifold on a concrete foundation 100 to form the underwater production manifold 2, and determining the actual in-place position of the underwater production manifold 2.
Due to the limited accuracy of the hoisting, it may happen that the actual in-situ position of the subsea production manifold 2 deviates from the designed position.
In order to avoid collision with the steel cylinder 1 during lowering of the production manifold, it is necessary for the diver to observe the production manifold entering water and being in place near the steel cylinder 1.
Step S4: mounting hole for chiseling fixing pin
According to the actual in-place position of the underwater production manifold 2, mounting holes 4 are respectively chiseled into the concrete foundation 100 along the preformed holes 3 one by one, each preformed hole 3 and the corresponding mounting hole 4 form a long hole which penetrates through each other, each long hole which penetrates through each long hole is used for mounting a fixing pin 5, wherein the mounting holes 4 are used for arranging the parts of the fixing pins 5 penetrating into the concrete foundation 100, and the parts are shown in fig. 2.
Specifically, drilling of the mounting hole for the fixing pin is manually performed, and a diver removes concrete on the concrete foundation 100 opposite to the prepared hole 3 using an excavating apparatus such as a pneumatic pick, a breaking hammer, or the like.
Step S5: selecting four preformed holes, installing a fixing pin and injecting cement slurry into the preformed holes according to the requirement that each through long hole is provided with one fixing pin 5, and specifically comprising the following steps:
step S51: a diver inserts a fixing pin 5 into the preformed hole 3, and the fixing pin 5 penetrates through the preformed hole 3 until extending into the mounting hole 4;
step S52: respectively injecting cement slurry 200 into the preformed holes 3, wherein the cement slurry 200 flows into the mounting holes 4 along the preformed holes 3 and gradually spreads from bottom to top until the cement slurry 200 is filled in four selected preformed holes 3;
step S53: standing for a period of time, when the cement paste is hardened, the fixing pin 5 is wrapped by the hardened cement paste, and the underwater production manifold 2 is fixed on the concrete foundation 100 through the fixing pin 5.
Wherein, 5 upper portions of fixed pin are through hardened grout and 2 fixed connection of underwater production manifold, and 5 lower parts of fixed pin are through hardened grout and concrete foundation 100 fixed connection, and then realized passing through 5 anchor of fixed pin with the underwater production manifold 2 on concrete foundation 100 to reach the purpose of fixed underwater production manifold 2, as shown in fig. 3 and 4.
Since the anti-sinking plate and the concrete foundation 100 are both formed of high-strength structures, it is possible to ensure that the bonding strength of the fixing pin 5 satisfies the requirements.
The invention discloses a fixing pin fixing method for an underwater production manifold in a steel cylinder under a seabed mud surface, which is characterized in that after the underwater production manifold 2 is in place, a hole is formed in a concrete foundation 100 bearing the underwater production manifold 2, and a fixing pin 5 is installed, so that the underwater production manifold 2 can be fixed on the concrete foundation 100, and the underwater production manifold 2 is not limited by the in-place position of the underwater production manifold 2. The method disclosed by the invention is convenient to construct, low in manufacturing cost, capable of meeting the fixing requirement of the underwater production manifold 2 in the steel cylinder below the mud surface of the sea bed, is an economical and efficient fixing method, is suitable for fixing the production manifold in the underwater steel cylinder in the navigation area, and has wide application prospect in oil and gas development engineering in the Bohai sea navigation area.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (6)
1. A method for securing a fixed pin of an underwater production manifold in a steel cylinder located below the mud surface of the seabed, comprising:
carrying out foundation construction on the underwater production manifold: pouring concrete to the bottom in the steel cylinder (1) and leveling to form a concrete foundation (100);
setting a prepared hole: the bottom of the production manifold is provided with an anti-sinking plate, and at least four preformed holes (3) are arranged on the anti-sinking plate of the production manifold in advance;
the production pipe is gathered in water and positioned: hoisting a production manifold to enter water, placing the production manifold on the concrete foundation (100) to form an underwater production manifold (2), and determining the actual in-place position of the underwater production manifold (2);
chiseling a mounting hole of a fixing pin: according to the actual in-place position of the underwater production manifold (2), mounting holes (4) are respectively chiseled into the concrete foundation (100) one by one along the preformed holes (3), and each preformed hole (3) and the corresponding mounting hole (4) form a long hole which penetrates through each other;
installing a fixing pin: and according to the requirement that a fixing pin (5) is installed on each long hole penetrating through each other, installing the fixing pin and injecting cement slurry into the reserved hole.
2. The method for fixing the fixing pin of the subsea production manifold in the steel cylinder under the mud surface of the seabed according to claim 1, wherein in the step of providing the prepared hole, the inner diameter of the prepared hole (3) is slightly larger than the outer diameter of the fixing pin (5), and the upper portion of the prepared hole (3) is flared outward.
3. Method for fixing the anchor pin of a subsea production manifold in a steel cylinder under the mud surface of the seabed, according to claim 1, characterized in that in the step of bringing the production manifold into water and in place, it is necessary for a diver to observe the bringing of the production manifold into water and in place in the vicinity of the steel cylinder (1).
4. A method of fixing a fixing pin for a subsea production manifold in a steel cylinder under the mud surface of a seabed according to claim 1, characterized in that the drilling of the mounting hole of the fixing pin is performed manually, and a diver uses a cutting device to remove the concrete on the concrete foundation (100) opposite to the prepared hole (3).
5. The method for securing a securing pin for a subsea production manifold in a steel cylinder located below a mud surface of a seabed according to claim 1, wherein the installation of the securing pin comprises in particular the steps of:
step S51: a diver inserts the fixing pin (5) into the preformed hole (3), and the fixing pin (5) penetrates through the preformed hole (3) until extending into the mounting hole (4);
step S52: respectively injecting cement slurry (200) into the preformed holes (3), wherein the cement slurry (200) flows into the mounting holes (4) along the preformed holes (3) and gradually diffuses from bottom to top until the cement slurry (200) is filled in all the selected preformed holes (3);
step S53: static a period of time, treat the grout sclerosis, fixed pin (5) are wrapped up by the grout of sclerosis, underwater production manifold (2) are passed through fixed pin (5) are fixed on concrete basis (100).
6. The method for fixing the anchor pin of the subsea production manifold in the steel cylinder below the mud surface of the seabed according to claim 5, wherein in the step S53, the upper portion of the anchor pin (5) is fixedly connected to the subsea production manifold (2) by the hardened cement paste, and the lower portion of the anchor pin (5) is fixedly connected to the concrete foundation (100) by the hardened cement paste, thereby realizing the anchoring of the subsea production manifold (2) to the concrete foundation (100) by the anchor pin (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111281484.8A CN113970012A (en) | 2021-11-01 | 2021-11-01 | Fixing pin fixing method for underwater production manifold in steel cylinder under seabed mud surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111281484.8A CN113970012A (en) | 2021-11-01 | 2021-11-01 | Fixing pin fixing method for underwater production manifold in steel cylinder under seabed mud surface |
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| Publication Number | Publication Date |
|---|---|
| CN113970012A true CN113970012A (en) | 2022-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111281484.8A Pending CN113970012A (en) | 2021-11-01 | 2021-11-01 | Fixing pin fixing method for underwater production manifold in steel cylinder under seabed mud surface |
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| CN (1) | CN113970012A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201963273U (en) * | 2010-12-08 | 2011-09-07 | 中国海洋石油总公司 | Deep-water underwater pipe manifold structure |
| CN104060971A (en) * | 2014-06-19 | 2014-09-24 | 中国海洋石油总公司 | Assembly type underwater manifold structure |
| CN204552707U (en) * | 2015-04-14 | 2015-08-12 | 中国海洋石油总公司 | A kind of two sufficient Split type novel subsea manifold operator guards |
| CN106051307A (en) * | 2016-07-19 | 2016-10-26 | 航天晨光股份有限公司 | Combined fast-assembly pipeline support and mounting method thereof |
| CN107313723A (en) * | 2017-07-21 | 2017-11-03 | 中国海洋石油总公司 | Slidingtype super large caliber subsea manifold |
| CN206786136U (en) * | 2017-05-25 | 2017-12-22 | 大连船舶重工集团有限公司 | A kind of anchoring pile type subsea manifold support system |
| CN108222058A (en) * | 2018-02-14 | 2018-06-29 | 天津大学 | A kind of bucket foundation and its construction method with adjustable anti-buckling device |
| CN110439495A (en) * | 2019-08-21 | 2019-11-12 | 中海油能源发展股份有限公司 | A kind of subsea production system protective device |
| CN112682007A (en) * | 2020-12-22 | 2021-04-20 | 中海石油(中国)有限公司 | Wet-type protection system for oil and gas production under seabed mud surface |
| CN112727408A (en) * | 2020-12-03 | 2021-04-30 | 中海石油(中国)有限公司 | Installation method of oil-gas production dry-type protection structure located under seabed mud surface |
-
2021
- 2021-11-01 CN CN202111281484.8A patent/CN113970012A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201963273U (en) * | 2010-12-08 | 2011-09-07 | 中国海洋石油总公司 | Deep-water underwater pipe manifold structure |
| CN104060971A (en) * | 2014-06-19 | 2014-09-24 | 中国海洋石油总公司 | Assembly type underwater manifold structure |
| CN204552707U (en) * | 2015-04-14 | 2015-08-12 | 中国海洋石油总公司 | A kind of two sufficient Split type novel subsea manifold operator guards |
| CN106051307A (en) * | 2016-07-19 | 2016-10-26 | 航天晨光股份有限公司 | Combined fast-assembly pipeline support and mounting method thereof |
| CN206786136U (en) * | 2017-05-25 | 2017-12-22 | 大连船舶重工集团有限公司 | A kind of anchoring pile type subsea manifold support system |
| CN107313723A (en) * | 2017-07-21 | 2017-11-03 | 中国海洋石油总公司 | Slidingtype super large caliber subsea manifold |
| CN108222058A (en) * | 2018-02-14 | 2018-06-29 | 天津大学 | A kind of bucket foundation and its construction method with adjustable anti-buckling device |
| CN110439495A (en) * | 2019-08-21 | 2019-11-12 | 中海油能源发展股份有限公司 | A kind of subsea production system protective device |
| CN112727408A (en) * | 2020-12-03 | 2021-04-30 | 中海石油(中国)有限公司 | Installation method of oil-gas production dry-type protection structure located under seabed mud surface |
| CN112682007A (en) * | 2020-12-22 | 2021-04-20 | 中海石油(中国)有限公司 | Wet-type protection system for oil and gas production under seabed mud surface |
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Application publication date: 20220125 |