Ball valve for sampling, natural gas hydrate fidelity sampler and sampling method

A sampler and ball valve technology, applied in the sampling field of energy development, can solve the problems of limited pressure holding effect, complex sealing process and sealing structure of natural gas hydrate sampler, etc.

Active Publication Date: 2020-10-27
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a ball valve for sampling, a natural gas hydrate fidelity sampler, and a sampling method to solve the problems in the prior art that the sealing process and sealing structure of the natural gas hydrate sampler are very complicated and the pressure-holding effect is limited. The sampler is quickly sealed and opened, and the pressure is stable to improve the fidelity of the sample

Method used

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  • Ball valve for sampling, natural gas hydrate fidelity sampler and sampling method
  • Ball valve for sampling, natural gas hydrate fidelity sampler and sampling method
  • Ball valve for sampling, natural gas hydrate fidelity sampler and sampling method

Examples

Experimental program
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Effect test

Embodiment 1

[0048] Such as figure 1 and figure 2 A ball valve for sampling is shown, which includes a matching shell and a valve core 801, the valve core 801 is fixedly connected with a pin 802 that is partially located outside the shell, and the part of the pin 802 that is located outside the shell cooperates with the steering head 803; The first piston 804 that drives the steering head 803 to rotate. One end of the bolt 802 is fixedly connected with the valve core 801, and the other end protrudes out of the casing; and the end of the bolt 802 outside the casing is polygonal, and the steering head 803 includes a square hole matching the polygon; the steering head 803 is sleeved on the bolt 802 outside. Sealing rubber rings 805 matching with the valve core 801 are provided on both ends of the housing.

[0049] In this embodiment, the pressure accumulator in the fidelity sampler is used as the power source of the first piston 804. The pressure accumulator releases pressure to push the ...

Embodiment 2

[0052] Such as Figure 1 to Figure 3 In the shown ball valve for sampling, on the basis of Embodiment 1, a boss 810 is set on the first piston 804, and a spiral track matching the boss 810 is set on the housing, and the boss 810 slides and fits in the spiral track The output end of the first piston 804 is connected to the bearing 811, the bearing 811 is fixed with the guide post 812, the steering head 803 is provided with a waist-shaped hole 813 matching the guide post 812, and the guide post 812 is slidably fitted in the waist-shaped hole 813.

[0053] When the present embodiment works, the first piston 804 moves downward as a whole. Due to the limitation of the boss 810, it can only rotate downward along the spiral track on the housing, and the output end of the first piston 804 is fitted with a bearing, so the upper end of the first piston 804 The guide post can not be rotated, but still keeps going straight down. The guide post moves in the waist-shaped hole and at the sam...

Embodiment 3

[0055] Natural gas hydrate fidelity sampler, such as Figure 4 As shown, it includes a sleeve 9, a pilot drill 7 located at the lower end of the sleeve 9, and an inner cylinder 4 located inside the sleeve 9. The lower end of the inner cylinder 4 is connected to the claw 5 and the valve 6 in turn, and a pressure accumulator is arranged inside the sleeve 9. 3. The valve 6 is a ball valve for sampling, and the first piston 804 is powered by the pressure accumulator 3 .

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Abstract

The invention discloses a ball valve for sampling, a natural gas hydrate fidelity sampler and a sampling method. The ball valve comprises a shell and a valve core which are matched with each other, the valve core is fixedly connected with a plug pin partially located outside the shell, and the part, located outside the shell, of the plug pin is matched with a steering head; and the ball valve further comprises a first piston for driving the steering head to rotate. The invention aims to provide a ball valve for sampling, a natural gas hydrate fidelity sampler and a sampling method. The problems that in the prior art, the sealing process and the sealing structure of a natural gas hydrate sampler are very complex, and the pressure maintaining effect is limited are solved, rapid sealing and opening of the sampler are achieved, pressure stability is guaranteed, and the fidelity degree of a sample is improved.

Description

technical field [0001] The invention relates to the field of sampling for energy development, in particular to a ball valve for sampling, a natural gas hydrate fidelity sampler and a sampling method. Background technique [0002] Natural gas hydrate is an ice-like crystalline substance distributed in deep-sea sediments or land permafrost, formed by natural gas and water under high-pressure and low-temperature conditions. It is a new type of energy with high combustion value, clean and pollution-free. Wide distribution and huge reserves are the strategic commanding heights of future global energy development. In the study of gas hydrate, sample sampling is one of the most intuitive and important research methods. [0003] Different from conventional oil and gas drilling coring, since gas hydrates need to be taken out under a stable pressure state to avoid their decomposition, a pressure-holding method is required for sampling. The early technology used a core remover with a...

Claims

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Application Information

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IPC IPC(8): G01N1/08
CPCG01N1/08
Inventor 胡刚徐简繁王国荣李洪宇莫丽王文钟林张先凡马建波
Owner SOUTHWEST PETROLEUM UNIV
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