CN113236174A - Down-inserting type limiting well lid and preparation method thereof - Google Patents
Down-inserting type limiting well lid and preparation method thereof Download PDFInfo
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- CN113236174A CN113236174A CN202110624881.4A CN202110624881A CN113236174A CN 113236174 A CN113236174 A CN 113236174A CN 202110624881 A CN202110624881 A CN 202110624881A CN 113236174 A CN113236174 A CN 113236174A
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- manhole cover
- coating
- handle
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- cover body
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- 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
-
- 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
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- 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
- E21B41/02—Equipment or details not covered by groups E21B15/00 - E21B40/00 in situ inhibition of corrosion in boreholes or wells
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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)
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
本发明涉及一种下插式限位井盖及其制备方法，包括如下部件：井盖本体，所述井盖本体底部设置有若干支撑腿，所述井盖本体为圆形井盖，沿所述井盖本体的周壁方向上设置有一圈环形凸起，所述凸起被配置为与采油井的井口外壁面相适配；第一把手和第二把手，所述第一把手和所述第二把手对称设置在所述井盖本体上。所述的下插式限位井盖，优选地，所述井盖本体、所述凸起以及所述支撑腿上均喷涂有耐腐蚀涂层。本发明在井盖表面喷砂和喷涂耐腐蚀涂层，大大提高了井盖的抗腐蚀性，延长了井盖的使用寿命，降低海上采油的成本。
The invention relates to a bottom-inserted limit manhole cover and a preparation method thereof, comprising the following components: a manhole cover body, a plurality of support legs are arranged at the bottom of the manhole cover body, the manhole cover body is a circular manhole cover, and the manhole cover body is a circular manhole cover, and the manhole cover body is formed along the peripheral wall of the manhole cover body. A ring of annular protrusions are arranged in the direction, and the protrusions are configured to match the outer wall surface of the wellhead of the oil production well; a first handle and a second handle, the first handle and the second handle are symmetrically arranged on the well cover body superior. In the said down-insertion limit manhole cover, preferably, the manhole cover body, the protrusions and the support legs are all sprayed with a corrosion-resistant coating. By blasting sand and spraying anti-corrosion coating on the surface of the well cover, the invention greatly improves the corrosion resistance of the well cover, prolongs the service life of the well cover, and reduces the cost of offshore oil production.
Description
Technical Field
The invention relates to a downward inserting type limiting well cover and a preparation method thereof, and belongs to the technical field of offshore oil exploration.
Background
As the well mouth area of the offshore oil platform is provided with a certain number of functional holes according to production operation requirements, the functional holes mainly comprise square cover plate holes during well drilling and completion, round cover plate holes during well drilling and completion and well repair, small holes in the middle of a round cover plate during well repair and the like, and the production operation of an oil field is convenient to implement.
With the development of offshore oil fields, the field operations (cross and parallel) of oil fields are increased, and the operations (drilling and completion, well repair and the like) related to holes are also increased greatly. During such operations, due to environmental, personnel, implements, etc., different levels of risk are presented to the safety of the operation (implements, personnel, etc.): (1) the operation area is irregular, which is not beneficial to area isolation; (2) severe weather such as strong wind and rainstorm; (3) the hole cover plate is hidden; (4) the operation space is narrow; (5) equipment, personnel, etc.
Because the production time of each offshore platform is different, the types of the cover plates are also different, and the cover plates are roughly divided into the following wellhead cover plates according to carding: the safety belt of the individual platform wellhead cover plate has no proper hanging point. In general, the well mouth round cover plate has low height of the surrounding edge, and the condition of untight cover is easy to occur. In addition, the mark for forbidding trampling is not obvious, and once trampling by mistake, the risk of overturning exists. Because the old well lid is not added with the anti-overturning design, the overturning event is easy to occur when the well lid is in the virtual shield or even in the normal operation, meanwhile, the field operation (crossing and parallel) of the oil field is increased along with the development of the offshore oil field, and the operation (drilling and completion, well repair and the like) related to the hole is also greatly increased. In the process of such operations, due to the environment, personnel, implements and the like, risks are brought to the operation (implements, personnel and the like) safety to different degrees, in recent years, accidents that many operators fall from the wellhead area of the top deck occur in various sea areas, the wellhead area becomes a great safety challenge in the operation, and in order to prevent similar accidents from happening again, from the safety perspective, how to improve engineering, how to manage and raise measures and the like are urgent.
Disclosure of Invention
The invention provides a downward-inserting type limiting well lid and a preparation method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a spacing well lid of formula of inserting down which characterized in that includes following part:
the manhole cover comprises a manhole cover body, wherein a plurality of supporting legs are arranged at the bottom of the manhole cover body, the manhole cover body is a round manhole cover, a circle of annular bulges are arranged in the peripheral wall direction of the manhole cover body, and the bulges are configured to be matched with the outer wall surface of a wellhead of a production well;
the manhole cover comprises a first handle and a second handle, wherein the first handle and the second handle are symmetrically arranged on the manhole cover body.
The spacing well lid of formula of inserting down, preferably, the well lid body protruding and all the spraying has corrosion resistant coating on the supporting leg.
The down-inserting type limit well lid is preferably characterized in that the total thickness of the corrosion-resistant coating is more than 250 micrometers.
The down-inserting type limiting well lid is preferably characterized in that the corrosion-resistant coating comprises a primer coating, an intermediate paint coating and a finish paint coating, and the thickness ratio of the primer coating to the intermediate paint coating to the finish paint coating is (2-3): (5-7): (2-3).
The down-inserting type limit well lid is characterized in that the thickness ratio of the primer coating to the intermediate coating to the finish coating is 2: 5: 2.
the down-inserting type limiting well lid is characterized in that preferably, the primer coating is an epoxy zinc-rich primer coating, the intermediate paint coating is a chlorosulfonated micaceous iron intermediate paint coating, and the finish paint coating is a polyurethane finish paint coating.
The down-inserting type limiting well lid is preferably characterized in that the content of zinc in the epoxy zinc-rich primer coating is 50-85 wt%.
Spacing well lid of formula of inserting down, preferably, well lid body with still the spraying has the sand blasting layer between the corrosion resistant coating, the grade on sand blasting layer is Sa 2.5 ═ 2.5.
The lower insertion type limit well lid preferably comprises a first handle and a first fixing part, wherein the first fixing part is configured to be fixed on the outer wall surface of the protrusion;
the second handle includes a second holding portion and a second fixing portion configured to be fixed on an outer wall surface of the protrusion.
Based on the down-inserting type limit well lid, the invention also provides a preparation method of the device, preferably, the preparation method comprises the following steps:
and welding the well lid body with the supporting legs, the first handle and the second handle together to form the downward-inserting type limiting well lid, then performing sand blasting on the surface of the downward-inserting type limiting well lid, and finally performing sand blasting on the corrosion-resistant coating.
Due to the adoption of the technical scheme, the invention has the following advantages:
1. aiming at an in-service platform, the device mainly improves the operation safety of a wellhead area, the transformation amount of a round cover plate is as small as possible, and a reasonable and feasible wellhead cover plate transformation, protection equipment and corresponding management improvement and modification scheme which are divided into sea areas are provided without transforming a large cover plate; the safety measure is 'safe and environment-friendly, convenient to operate and easy to modify', aiming at a later-stage newly-built platform, a unified and standardized standard of well head circular cover plates and hole protection is formulated, and accident potential hazards are reduced to the lowest from the source with the minimum investment.
2. The downwards-inserted limiting well cover is provided with the protrusions, so that the protrusions are matched with the well mouth edge wall, and the supporting legs are arranged on the well cover, so that the well cover is prevented from being overturned and collapsed to cause casualties after people trample the well cover.
3. The invention sandblasts and sprays the corrosion-resistant coating on the surface of the well lid, thereby greatly improving the corrosion resistance of the well lid, prolonging the service life of the well lid and reducing the cost of offshore oil extraction.
Drawings
Fig. 1 is a side view of a downward insertion type limiting well lid according to an embodiment of the present invention;
fig. 2 is a top view of the downward insertion type limiting well lid according to the embodiment of the present invention;
fig. 3 is a schematic structural view of a first handle in the downward-inserting limit well lid according to the embodiment of the present invention;
fig. 4 is a schematic structural view of a second handle in the downward insertion type limiting well lid provided in the embodiment of the present invention;
the respective symbols in the figure are as follows:
1-a well lid body, 101-a bulge; 2-supporting legs; 3-a first handle, 301-a first hand-held portion, 302-a first fixed portion; 4-second handle, 401-second hand-held part, 402-second fixed part; 5-oil production well.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention are described clearly and completely below, and it is obvious that the described embodiments are some, not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. As used herein, the terms "first," "second," "third," "fourth," and the like do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
As shown in fig. 1 and 2, the invention provides a downward-inserting type limiting well lid, which comprises the following components:
the manhole cover comprises a manhole cover body 1, wherein a plurality of supporting legs 2 are arranged at the bottom of the manhole cover body 1, the manhole cover body 1 is a round manhole cover, a circle of annular bulges 101 are arranged in the circumferential wall direction of the manhole cover body 1, and the bulges 101 are configured to be matched with the outer wall surface of a wellhead of a production well 5;
the manhole cover comprises a first handle 3 and a second handle 4, wherein the first handle 3 and the second handle 4 are symmetrically arranged on the manhole cover body 1.
In a preferred embodiment of the present invention, as shown in fig. 1, the manhole cover body 1, the protrusions 101 and the supporting legs 2 are coated with a corrosion-resistant coating.
In a preferred embodiment of the invention, the total thickness of the corrosion-resistant coating is more than 250 μm.
In a preferred embodiment of the invention, the corrosion-resistant coating comprises a primer coating, a middle paint coating and a top paint coating, and the thickness ratio of the primer coating to the middle paint coating to the top paint coating is (2-3): (5-7): (2-3).
In a preferred embodiment of the invention, the ratio of the thicknesses of the primer coating, the intermediate lacquer coating and the top lacquer coating is 2: 5: 2.
in a preferred embodiment of the invention, the primer coating is an epoxy zinc-rich primer coating, the intermediate paint coating is a chlorosulfonated micaceous iron intermediate paint coating, and the finish coating is a polyurethane finish coating.
In a preferred embodiment of the invention, the content of zinc in the epoxy zinc-rich primer coating is 50-85 wt%.
In a preferred embodiment of the invention, a sand blasting layer is further sprayed between the manhole cover body 1 and the corrosion-resistant coating, and the grade of the sand blasting layer is Sa-2.5.
In a preferred embodiment of the present invention, as shown in fig. 3 and 4, the first handle 3 includes a first hand-held portion 301 and a first fixing portion 302, the first fixing portion 302 being configured to be fixed to an outer wall surface of the projection 101;
the second handle 4 includes a second hand-held portion 401 and a second fixing portion 402, and the second fixing portion 402 is configured to be fixed to an outer wall surface of the boss 101.
In the invention, the corrosion resistance of the well lid is greatly improved due to the adoption of the epoxy zinc-rich primer, and the corrosion resistance of the well lid is directly influenced by the zinc content, and the influence of the zinc content in the primer on the corrosion resistance of the well lid is compared through the following table 1:
TABLE 1 influence of Zinc content in epoxy Zinc-rich primer on Corrosion resistance of manhole cover
The corrosion resistance time of the well lid in the table 1 is based on a salt spray corrosion resistance test (GB/T10125-1997), the well lid is continuously corroded by salt spray in a salt spray environment, the unidirectional corrosion spread of a scratch is less than or equal to 2.0mm, and the corrosion resistance time of a scratch-free area without rusting, cracking and peeling is short. As can be seen from table 1, the corrosion resistance time of the manhole cover is gradually prolonged as the zinc content in the primer is increased.
On the other hand, the thickness of the primer layer, the intermediate paint layer and the finish paint layer also affects the corrosion resistance of the manhole cover, as shown in table 2:
TABLE 2 Effect of thickness of primer, intermediate and topcoat layers on well lid Corrosion resistance
The corrosion resistance time of the well lid in the table 2 is based on a salt spray corrosion resistance test (GB/T10125-1997), the well lid is continuously corroded by salt spray in a salt spray environment, the unidirectional corrosion spread of the scratch is less than or equal to 2.0mm, and the corrosion resistance time of the scratch-free area without rusting, cracking and peeling is short. As can be seen from table 2, the corrosion resistance time of the manhole cover is gradually prolonged as the thickness of the primer increases.
In the practical application of an offshore platform, taking 860mm round well cover design as an example, considering the principle that the requirement of welding distance is limited and the limit distance is close to the round well cover as much as possible, the distance between the lower inserted support leg 2 (steel pipe) and the inner edge of the wellhead is recommended to be 40 mm; in combination with field trial experiments and experience, the plunge distance is recommended to be 350 mm. The height of the bulge 101 is 45mm, and the thickness of the well lid body 1 is 10 mm. The diameter of steel pipe is 50mm, and the quantity of steel pipe is 3, uses well lid centre of a circle as central evenly distributed. The length of the first handle 301 and the second handle 401 is 204mm, the length of the first fixing portion 302 and the second fixing portion 402 is 60mm, the first handle 301 and the first fixing portion 302 are connected by welding through a steel pipe, and the length of the steel pipe is 84 mm. In addition, on one hand, the finish paint layer is red paint, so that the finish paint layer is obvious and easy to see by oil extraction personnel, and meanwhile, words such as 'pressing down strictly' are sprayed on the well cover, so that the oil extraction personnel are further reminded of pressing down by mistake.
Based on the downwards inserted limit well lid, the invention also provides a preparation method of the well lid, which comprises the following steps:
and welding the well lid body 1 with the supporting legs 2, the first handle 3 and the second handle 4 together to form the downward-inserted limiting well lid, then blasting sand on the surface of the downward-inserted limiting well lid, and finally spraying the corrosion-resistant coating.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110624881.4A CN113236174A (en) | 2021-06-04 | 2021-06-04 | Down-inserting type limiting well lid and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110624881.4A CN113236174A (en) | 2021-06-04 | 2021-06-04 | Down-inserting type limiting well lid and preparation method thereof |
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| CN113236174A true CN113236174A (en) | 2021-08-10 |
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| CN206054722U (en) * | 2016-09-21 | 2017-03-29 | 泰州东远动力设备有限公司 | Multi-jaw chuck formula manhole cover |
| CN208136935U (en) * | 2018-04-09 | 2018-11-23 | 孟祥琦 | A kind of Manhole cover assembly |
| CN210597351U (en) * | 2019-05-29 | 2020-05-22 | 浙江瑞森路政设施有限公司 | Non-bearing square manhole cover |
| CN210595882U (en) * | 2019-07-09 | 2020-05-22 | 江苏山力漆业有限公司 | Graphene modified waterborne epoxy heavy-duty anticorrosive paint |
| CN211057863U (en) * | 2019-11-04 | 2020-07-21 | 傅卫江 | Municipal administration prevents subsiding well lid |
| CN111719590A (en) * | 2020-07-27 | 2020-09-29 | 中建六局建设发展有限公司 | An observation well wellhead protection device that can automatically observe the water level |
| CN212003103U (en) * | 2020-04-10 | 2020-11-24 | 中国海洋石油集团有限公司 | Offshore oil production platform deck well head cover plate with locking and positioning functions |
| CN112796697A (en) * | 2020-12-31 | 2021-05-14 | 中国华冶科工集团有限公司 | Mine downward deep hole protection device and protection method |
-
2021
- 2021-06-04 CN CN202110624881.4A patent/CN113236174A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060127178A1 (en) * | 2004-05-03 | 2006-06-15 | Neenah Foundry Company | Socket hinged construction casting assembly |
| CN204435425U (en) * | 2015-01-30 | 2015-07-01 | 天津市铁成科技发展有限公司 | A kind of waterproof anti-corrosion manhole cover system |
| CN206054722U (en) * | 2016-09-21 | 2017-03-29 | 泰州东远动力设备有限公司 | Multi-jaw chuck formula manhole cover |
| CN208136935U (en) * | 2018-04-09 | 2018-11-23 | 孟祥琦 | A kind of Manhole cover assembly |
| CN210597351U (en) * | 2019-05-29 | 2020-05-22 | 浙江瑞森路政设施有限公司 | Non-bearing square manhole cover |
| CN210595882U (en) * | 2019-07-09 | 2020-05-22 | 江苏山力漆业有限公司 | Graphene modified waterborne epoxy heavy-duty anticorrosive paint |
| CN211057863U (en) * | 2019-11-04 | 2020-07-21 | 傅卫江 | Municipal administration prevents subsiding well lid |
| CN212003103U (en) * | 2020-04-10 | 2020-11-24 | 中国海洋石油集团有限公司 | Offshore oil production platform deck well head cover plate with locking and positioning functions |
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| CN112796697A (en) * | 2020-12-31 | 2021-05-14 | 中国华冶科工集团有限公司 | Mine downward deep hole protection device and protection method |
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Application publication date: 20210810 |