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A Long Stroke Pushing and Rotating Device for Natural Gas Hydrate Core Tube

A technology of rotating device and core tube, which is applied in the field of long-stroke pushing rotating device for natural gas hydrate sampling pipes, which can solve problems such as core instability and pressure leakage, reduce deflection changes, reduce friction, and improve sealing and pressure-holding performance Effect

Active Publication Date: 2020-05-22
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing core tube transfer device can only complete the horizontal push of the core tube; during the horizontal movement, the core is unstable and swings; due to the use of dynamic seals, pressure leakage will occur, so the existing core tube transfer device is still good. room for improvement

Method used

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  • A Long Stroke Pushing and Rotating Device for Natural Gas Hydrate Core Tube
  • A Long Stroke Pushing and Rotating Device for Natural Gas Hydrate Core Tube
  • A Long Stroke Pushing and Rotating Device for Natural Gas Hydrate Core Tube

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Embodiment Construction

[0034] The following examples can make those skilled in the technical field understand the present invention more comprehensively, but do not limit the present invention in any way.

[0035] Such as figure 1 As shown, a long-stroke pushing and rotating device for a natural gas hydrate core tube includes a high-pressure cylinder 4 for transferring the core tube and a core tube grab bar 21, and also includes an active slider structure 11, a supporting slider structure 12, The core tube supports the slide structure 13 .

[0036] The high-pressure cylinder 4 has multiple sections, and each section is connected by a flange 5 . The two ends of the high-pressure cylinder body 4 are respectively connected to the driving box 3 and the rear end cover 23 by bolts. Drive motors 1,9 are installed in the drive box 3 . Drive motors 1 and 9 are AC servo motors.

[0037] Such as figure 2 , the inside of the high-pressure cylinder 4 is provided with a slide rail 19 along the axial directi...

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Abstract

The invention relates to the technical field of long-stroke pushing and rotating, and aims to provide a long-stroke pushing and rotating device for a natural gas hydrate sampling tube. The device comprises a high-pressure cylinder body used for transferring a rock core tube and a rock core tube grabbing rod arranged in the high-pressure cylinder body, and further comprises a driving sliding blockstructure arranged on a sliding rail and used for driving a spline shaft through a lead screw, a rock core tube grabbing rod supporting sliding block structure and a rock core tube supporting slidingtable structure. The rock core tube grabbing rod is arranged on the driving sliding block structure and the rock core tube grabbing rod supporting sliding block structure in a sleeving mode. After therock core tube is grabbed, during horizontal pushing or rotating motion, the shaking of the rock core tube grabbing rod is reduced; the deflection change of the rock core tube grabbing rod under theaction of a cantilever is reduced; and a driving mode of magnetic coupling is adopted, so that original dynamic seal is changed to static seal, and the sealing pressure maintaining performance of a system is improved.

Description

technical field [0001] The invention relates to the technical field of long-stroke pushing and rotating, in particular to a long-stroke pushing and rotating device for a natural gas hydrate sampling pipe. Background technique [0002] Gas hydrates widely exist in the seabed and terrestrial permafrost. Due to the special living conditions of gas hydrates, it is of profound significance for scientists to study gas hydrate core samples under in-situ pressure. With the improvement of oil and gas drilling technology and ocean deep water sampling technology, scientists have the opportunity to directly study natural gas hydrates. Through the implementation of exploration projects and the use of pressure-holding coring technology to obtain cores of natural gas hydrates in situ and analyze the core samples, researchers can fully understand the occurrence forms, physical properties and formation mechanical properties of natural gas hydrates. Other parameters provide a theoretical bas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/24G01N33/22
CPCG01N33/22G01N33/24
Inventor 陈家旺任自强高巧玲王玉红乐晓凌肖婧
Owner ZHEJIANG UNIV
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