Wellhead butt joint device and butt joint method thereof

Abstract

The invention relates to the technical field of well repair, in particular to a well mouth butt joint device and a butt joint method thereof.The well mouth butt joint device comprises a semi-ring horizontal supporting frame, a first bolt, a semi-ring clamping block, a centering calibration assembly, a calibration device, a pulley, a first supporting frame, a second supporting frame, an anti-collision assembly and a rubber anti-collision pad; one ends of the two semi-ring horizontal supporting frames are fixedly connected through a plurality of first bolts, each semi-ring horizontal supporting frame is fixedly provided with a semi-ring clamping block, the centering calibration assembly comprises a plurality of sets of calibration devices, each set of calibration device comprises two pulleys, the first supporting frames are fixedly connected with the centering calibration assembly, and the second supporting frames are fixedly connected with the centering calibration assembly. The multiple second supporting frames are all connected with the centering calibration assembly in a clamped mode, each anti-collision assembly comprises two rubber anti-collision pads, an upper pipe sleeve and a lower pipe sleeve can be aligned, the upper pipe sleeve can be prevented from shaking, the welding quality and the welding efficiency are improved, installation is convenient, operation is easy, semi-ring clamping blocks can be replaced, and the welding efficiency is improved. And the device is also suitable for flange connection and pipe sleeve installation of other well drilling.

Description

technical field [0001] The invention relates to the technical field of well workover, in particular to a wellhead docking device and a docking method. Background technique [0002] Drilling wells that exploit subsurface thermal resources (mainly natural steam, hot water and hot brine, etc.) are called geothermal wells. The so-called geothermal heat refers to the thermal resources inside the earth that can be economically utilized by human beings. As the mine goes deeper, it is always getting hotter. The deeper the hole, the higher the temperature at the bottom. [0003] In the construction of geothermal wells, when the casings need to be installed, several casings are welded in sequence, the casings need to be vertically hoisted, and then the lower end of the lifted casing and the upper end of the casing located in the wellhead assembly During welding, since the pipe sleeve is hoisted, it is easy to shake, resulting in the two pipe sleeves not being aligned, which makes w...

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Problems solved by technology

[0003] During the construction of geothermal wells, when it is necessary to install pipe sleeves, several pipe sleeves are welded in sequence, and the pipe sleeves need to be lifted vertically, and then the lower end of the hoisted pipe sleeve and the upper end of the pipe sleeve located in the wellhead assembly For welding, because the pipe sleeve is lifted, it is easy to shake, which will cause the two pipe sleeves to be out of alignment, which will cause difficulties in welding, and the hoisted pipe sleeve will shake and skew during the welding process, which will affect the welding quality and seriously cause The welding is skewed and needs to be cut and welded again, so it is necessary to design a wellhead docking device and its docking method

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