Single-barrel four-well wellhead device and oil (gas) extraction tree

Abstract

The invention discloses a single-barrel four-well wellhead device and an oil (gas) extraction tree, which comprise a four-hole pile pipe waterproof base plate, a waterproof pile pipe, four groups of same single-well wellhead devices and four groups of oil (gas) extraction trees, and the single-well wellhead devices and the oil (gas) extraction trees are not interfered with one another, and four refilling holes are arranged at the top of the four-hole pile pipe waterproof base plate; the refilling holes are used for refilling cement into an annular space between the four-hole pile pipe waterproof base disc and the waterproof pile pipe, and the four-hole pile pipe waterproof base disc is installed at the top of the waterproof pile pipe in an embedded mode. According to the single-barrel four-well wellhead device and the oil (gas) extraction tree, the four relatively independent well holes are designed in the same waterproof pile pipe base disc through the quick connecting structures, and the four relatively independent single-well wellhead devices and the oil (gas) extraction tree share the same pile pipe waterproof base disc and waterproof pile pipe; the problem that the installation space of the ocean platform is limited is effectively avoided; meanwhile, the sealing reliability is further improved by sharing the waterproof pile pipe, the drilling efficiency is improved, and the drilling and production cost is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of offshore platform oil and gas, in particular to a single-tube four-well wellhead device and an oil (gas) tree. Background technique [0002] Based on the current situation that my country's exploitation of offshore oil and gas resources is seriously unbalanced, strengthening the development and utilization of offshore oil and gas resources will not only alleviate the current situation of my country's tight utilization of energy resources, but also further improve the structure of my country's energy exploitation. The development of offshore oil and gas drilling platform technology is an important link in the exploitation of marine energy resources. Improving drilling platform technology can not only provide guarantee for the safe construction of offshore oil and gas exploration, but also demonstrate to the world my country's ability and technical level in the application of marine technology. Therefore, ...

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Problems solved by technology

[0004] Although my country has achieved localization in some relatively advanced offshore oil and gas equipment, it basically stays in the manufacture of structural parts, the corresponding supporting technology lags behind, and equipment innovation is relatively slow. Key equipment and technologies are still in the hands of foreign companies. It affects the large-scale development and utilization of offshore oil and gas in my country. For this reason, we propose a single-tube four-well wellhead device and an oil (gas) tree

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