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A long-stroke pushing and rotating device for pressure-holding core tubes in a pressure-holding transfer system

A transfer system and core tube technology, which is applied in the direction of extraction of undisturbed cores, earthwork drilling, etc., can solve problems such as core instability and pressure leakage, and achieve the effects of reducing deflection changes, friction and jitter.

Active Publication Date: 2020-06-16
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 pressure-holding core tubes in a pressure-holding transfer system
  • A long-stroke pushing and rotating device for pressure-holding core tubes in a pressure-holding transfer system
  • A long-stroke pushing and rotating device for pressure-holding core tubes in a pressure-holding transfer system

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Embodiment Construction

[0038] 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.

[0039] Such as figure 1As shown, a long-stroke pushing and rotating device for a pressure-holding core tube in a pressure-holding transfer system includes a high-pressure cylinder 4 for transferring the core tube and a core tube gripping rod 11, and also includes an auxiliary support slider structure 9, an active The slider structure 10 and the core tube support slider structure 13 .

[0040] 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 21 by bolts. A drive motor 1 is installed on the front end face of the drive box 3, and a drive motor 7 is installed on the left end face. The drive motors 1 and 7 are AC servo motors.

[...

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Abstract

The invention relates to the technical field of pressure-maintaining transfer, and aims at providing a long-stroke pushing and rotating device for a pressure-maintaining core barrel in a pressure-maintaining transfer system. The device comprises a high-pressure cylinder, and the interior of the high-pressure cylinder is provided with a substrate. The substrate is provided with an auxiliary supportsliding block structure, an active sliding block structure, and a core barrel sliding block structure. A screw is installed at the bottom of the auxiliary support sliding block structure, and the active sliding block structure forms a ball screw pair with the screw through a nut installed at the bottom. A spline shaft is installed at the top of the auxiliary support sliding block structure and the active sliding block structure. Core barrel grabbing rods are disposed at the central parts of the active sliding block structure and the auxiliary support sliding block structure and the top of thecore barrel sliding block structure. The spline shaft and the screw are driven by a drive box disposed at the front end of the high-pressure cylinder and a motor to operate. The device can complete the horizontal pushing, and also can complete the rotating operation of the core barrel. Moreover, the device can reduce the shake of the core barrel grabbing rods, and enables the operation to be morestable.

Description

technical field [0001] The invention relates to the technical field of pressure-holding transfer, in particular to a long-stroke pushing and rotating device for a pressure-holding core tube in a pressure-holding transfer system. Background technique [0002] Natural gas hydrate is considered to be a clean strategic alternative energy source in the future, and has an important impact on global warming, submarine landslides, and marine drilling safety. Since gas hydrates can only exist in high-pressure and low-temperature environments, it is of profound significance for scientists to study gas hydrate core samples under in-situ pressure. With the improvement of gas hydrate pressure-holding coring technology, scientists can obtain natural gas hydrate pressure-holding core samples under in-situ pressure, and analyze the core samples to fully understand the occurrence form, physical properties and formation of gas hydrate Mechanical properties and other parameters provide a theo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B25/00E21B25/18E21B25/10
CPCE21B25/005E21B25/10E21B25/18
Inventor 陈家旺任自强高巧玲肖婧
Owner ZHEJIANG UNIV
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