Step cylinder type well mouth protection frame and construction technology
A protection frame and column technology, applied in artificial islands, water conservancy projects, infrastructure projects, etc., can solve the problems of no development value of oil and gas fields, high installation costs, low return on investment, etc. Less and more economical effect
Inactive Publication Date: 2016-12-21
NEPTUNE OFFSHORE ENG DEV
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Problems solved by technology
The offshore installation of the jacket and the upper platform requires the use of large floating cranes, the driving of steel piles requires the use of piling hammers, and it needs to be connected with the jacket grouting, and the cost of offshore installation is high
For the development of offshore oil and gas fields, the traditional jacket-type wellhead platform scheme is adopted, the total development cost is high, the return on investment is low, and even the oil and gas fields have no development value
Method used
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[0028] The present invention will be described in detail below in conjunction with the accompanying drawings and examples.
[0029] Such as figure 1 As shown, the present invention includes an upper structure and a lower structure. The upper structure is composed of a box deck 1 and a support column 2 from top to bottom. The box deck 1 and the support column 2 are connected by welding, and the lower structure is formed from top to bottom. The column 3, the upper column 4, the lower column 5 and the suction pile 7 are composed of the column 3, the upper column 4, the lower column 5 and the suction pile 7 are all connected by welding, and the column 3 is located under the supporting column 2. Connected by welding, the suction pile 7 is a suction pile with a diameter of 16m. The supporting column 2, the upper cylindrical column 4 and the lower cylindrical column 5 are provided with a water-resistant casing protective pipe 6, and holes can be opened on the top cover of the lower ...
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The invention relates to a step cylinder type well mouth protection frame and a construction technology. The step cylinder type well mouth protection frame comprises an upper structure and a lower structure. The upper structure is composed of a box type deck and a supporting column. The lower structure is composed of a stand column, an upper cylinder, a lower cylinder and a pile foundation. The box type deck is adopted for replacing an upper blocking structure of a traditional platform, the usage number of reel pipes is reduced, and the construction difficulty is lowered; during shipment transporting, the fixing scheme is simple, and the usage amount of steel for a fixing structure is small; by the adoption of the upper cylinder and the lower cylinder, a well mouth protection frame supporting structure is simplified, buoyancy force can be provided during marine installation, the requirement on a floating crane is lowered, a water isolating casing pipe protection pipe is arranged in the cylinders, so that a conductor tube armor tubing is prevented from being subjected to environment loads, and in need, a hole can be formed in a top cover of the lower cylinder so as to improve well mouth guiding; and an ultra-large diameter suction pile is adopted in the pile foundation, self-floating can be achieved during marine transportation, no large floating cranes are needed in marine installation, the well mouth protection frame can be repeatedly utilized, and economic benefits are high.
Description
technical field [0001] The invention relates to a wellhead protective frame and its construction technology, in particular to a wellhead protective frame with a stepped column and a suction pile structure with a diameter greater than 15m and its construction technology. Background technique [0002] With the development of offshore oil and gas fields, wellhead platforms and wellhead protection frames have been widely used. The conventional jacket-type wellhead platform or wellhead protection frame adopts the upper platform of the beam-column space frame structure, and the lower part adopts the jacket structure and steel pile foundation to bear the environmental load. The jacket needs to be equipped with multi-layer horizontal guide structures for the water-resisting casing. The structural form is complex, the connection rigidity is weak, and the strength requirements for the water-resisting casing are high. This conventional jacket-type structure has high requirements for c...
Claims
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IPC IPC(8): E02B17/02E02D27/16E02D27/52E02D15/08
Inventor 王翎羽王春波
Owner NEPTUNE OFFSHORE ENG DEV