Method for arranging hoisting points and floating-supported conduit frame with skirt pile sleeves

Abstract

The invention relates to a method for arranging a hoisting point and a floating-supported conduit frame with skirt pile sleeves. The floating-supported conduit frame comprises a conduit frame main body, wherein the bottom of the conduit frame main body is provided with an underwater framework, a plurality of horizontal layers are arranged on the underwater framework, and a plurality of water-isolating sleeve guides are arranged on the horizontal layers; both sides of the underwater framework are provided with a plurality of main upright leg pipe columns, and ice cones are arranged on the main upright leg pipe columns; and a skirt pile sleeves are arranged on the plane of the conduit frame main body beyond the four corners, and the skirt pile sleeves are connected with the main upright leg pipe columns into a whole through a plurality of support rods to form an open type straight leg conduit frame structure with the skirt pile sleeves. The hoisting points are arranged on the top of the skirt pile sleeves. The method structurally increases the loading capacity of the supporting conduit frame, and the conduit frame is applicable to loading larger upper blocks; the penetration depth of piles driven into the bottom of the sea and pile driving refusal risk caused by marine pile driving work can be reduced, and hoisting can not be influenced by well mouth guides and the ice cones arranged on conduit frame pile legs; and the marine installation process of the conduit frame is furthest simplified, and marine installation cost and risk are also reduced.

Description

technical field [0001] The invention relates to a jacket, in particular to a floating jacket with a skirt pile sleeve and a method for setting a lifting point, belonging to the field of offshore oil engineering. Background technique [0002] In offshore oil development projects, various platforms such as oil production platforms, living platforms, and central processing platforms need to be built offshore. The platform generally mainly includes: offshore engineering blocks, offshore support-jackets, single points and other offshore engineering structures. [0003] With the development of large oil and gas fields, the platform structure is getting larger and larger, and the load on the upper block has increased sharply. The traditional block hoisting and installation method has become very difficult. It is necessary to use the block float-over installation method as a jacket for the block support. Floatover jackets are usually used. [0004] Such as figure 1 As shown, the ...

AI Technical Summary

Problems solved by technology

[0007] 1. Since the lifting point 5 is set under the horizontal layer 1 of the jacket, more wellhead guides 2 are set on the jacket, which restricts the lifting rope 6 from crossing the horizontal layer to connect the lifting point 5, causing the angle of the lifting rope 6 to increase, increasing the Hoisting height of the crane

Therefore, a floating crane with stronger hoisting capacity is required, which increases the equipment cost

[0008] 2. The lifting rope is relatively close to the wellhead guide 2, and the jacket is easy to collide with the wellhead guide 2 during hoisting operations

[0011] 2) If the lifting point is moved upwards above the ice cone 4, the local force on the root 10 of the main leg tube column 3 will increase, and the strength of the root of the main leg tube column 3 needs to be strengthened, resulting in an increase in the material consumption of the leg column , the weight of the entire jacket will increase, and the cost of materials, construction and installation will increase accordingly

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