Riser pipe construction technique of artificial island well drilling

Abstract

The invention discloses a construction process matched with a water stop pipe for an artificial island, and solves the problem for rapid, safe and accurate construction by the water stop pipe for the artificial island. The method comprises the whole process of prefabricating the water stop pipe, measuring and dropping a line, suspending the water stop pipe, piling, connecting and reaching elevation height. During prefabrication of the water stop pipe, a groove and an aligning ring are arranged on the pipe outside which a suspending ear is arranged; for convenience of suspending and accurate positioning, a pile-hoisting balancing stand and a pile location limiter are researched; the prior pipe-machine bound pile-hoisting is replaced by pile-hoisting combining a crane and the pile-hoisting balancing stand; the pile location limiter is used for preventing the water stop pipe from deviating when positioned; the aligning ring is used for the connection of pipes; the connecting groove is welded fully to reach the requirement of whole strength of the water stop pipe. The construction process can shorten construction time and improve construction quality, and has safety and convenience.

Description

technical field [0001] The invention provides a construction method for an artificial island drilling water-resisting conduit. The invention solves the problem of rapid, safe and accurate construction of the artificial island drilling water-resisting conduit, and belongs to the technical field of civil engineering construction in the early stage of a beach oil drilling project. Background technique [0002] In the process of oil exploitation in the beach area, due to the weak foundation of the artificial island and the corrosion of seawater, the difficulty of drilling and oil production is increased. At present, the main solution is to install the water riser at the preset wellhead position. The water riser is a casing that is lowered from the offshore drilling platform to the shallow seabed. Its main function is to isolate seawater, form a drilling fluid circulation channel, and at the same time serve as a supporting structure for the wellhead of the offshore platform. The ...

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Problems solved by technology

Since the construction of the riser is a civil construction method, whether its precision can meet the drilling requirements has become a technical bottleneck for the construction of the riser. Previously, there was no mature construction method for the riser of artificial island drilling.

At present, domestic offshore oil exploration and development widely adopt the method of offshore oil land production, that is, to build offshore oil land production platforms in beach areas, usually called artificial islands, and construct drilling and water-resisting conduits on artificial islands. After the construction is completed, it is difficult to drill and produce oil at the position of the water riser. It is very difficult to accurately construct the drilling water riser on the artificial island. Only 1 or 2 construction units in China have carried out the construction of the artificial island drilling water riser, and they all use the bundled type. Hoisting and ordinary piling methods, because the construction technology is only suitable for civil engineering standards, the construction effect of the completed drilling riser is not good, the construction speed is slow, the construction quality is poor, and the safety factor is low

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