Novel marine riser lift stub clamping disc

Abstract

The invention discloses a novel marine riser lift stub clamping disc. The novel marine riser lift stub clamping disc comprises a main body. The main body comprises two same semicircular bodies, the two ends of the two semicircular bodies are substructures and parent structures which can be riveted with each other, hinge holes are formed in the substructures and the parent structures correspondingly, the two semicircular bodies are fixedly connected together through a connecting structure, and the bottom ends of the two semicircular bodies are all arranged to be acute angle clamping structurescorrespondingly. The novel marine riser lift stub clamping disc has the advantages that the bottom ends of the semicircular bodies are the acute angle clamping structures correspondingly, the acute angles are installed in corresponding tensioning rings in a clamping mode during using, the main body encloses a water-insulation pipe, the contact part of the water-insulation pipe is clamped on the step surface on the panel of the main body, through double cooperation, and the stability of the water-insulation pipe is fully ensured in the using process; when the water-insulation pipe or a drivepipe needs to be replaced, displacement of the overall water-insulation pipe series can be realized through the cooperation of a hydraulic rod, the tensioning rings and the main body, the complex processes of disassembling and reinstalling the water-insulation pipe are omitted, the efficiency of working in the ocean is greatly improved, and the cost of the working in the ocean is further reduced.

Description

technical field [0001] The invention relates to the field of chucks, in particular to a novel riser elevator chuck. Background technique [0002] Risers are used to isolate seawater during deep-sea oil drilling. Usually, drill floor chucks are used to connect and disassemble risers, and tension rings support risers to avoid buckling deformation of risers at the bottom due to excessive length of riser strings. . [0003] The traditional chuck is installed on the drilling platform and can only clamp the riser. When the riser needs to be replaced, the old pipe strings can only be disassembled in sequence and the new riser can be connected in turn. , and then put into the corresponding casing for operation. This process takes a lot of time, and the cost of offshore operations is high. The disassembly and reconnection of the riser greatly increases the cost of offshore operations, and the riser is recycled. It will take up a lot of space behind the drill floor; when downhole ma...

AI Technical Summary

Problems solved by technology

[0003] The traditional chuck is installed on the drilling platform and can only clamp the riser. When the riser needs to be replaced, the old pipe strings can only be disassembled in sequence and the new riser can be connected in turn. , and then put into the corresponding casing for operation. This process takes a lot of time, and the cost of offshore operations is high. The disassembly and reconnection of the riser greatly increases the cost of offshore operations, and the riser is recycled. It will take up a lot of space behind the drill floor; when downhole maintenance or displacement of the riser is required, all the risers need to be hoisted to the drill floor; when the drill floor is stuck with the riser, the wellhead chuck cannot perform other operations. Operation

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