Bottom sediment gas-retaining sampler

A seabed sediment and sampler technology, applied in the field of devices for testing or analyzing materials, can solve the problems of gas-holding sampling, precipitation and escape, affecting the validity and accuracy of sample gas analysis, etc.

Inactive Publication Date: 2005-11-09
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most existing samplers use a fixed liner. During the process of lifting to the deck, the gas components in the sample will be separated out and escape due to the decrease in pressure. in sediment samples
This affects the effectiveness and accuracy of ...

Method used

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  • Bottom sediment gas-retaining sampler
  • Bottom sediment gas-retaining sampler
  • Bottom sediment gas-retaining sampler

Examples

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Embodiment Construction

[0010] The sediment sampler of the present invention comprises a release device and a sampling device, wherein the sampling device comprises a casing 4 with an open lower end and a liner 7 positioned in the casing 4, the lower end of the casing 4 is provided with a cutter head 1, and the liner 7 is connected to the casing. The tubes 4 are connected flexibly, the upper end of the liner 4 is fixed with a piston 14, and the upper end of the piston 14 is connected with the release device 13 through a wire rope 10, and a locking mechanism for dividing the chamber of the liner 7 is set on the liner 7. The corresponding trigger mechanism is set on the top, the locking mechanism is the hinge 15 hinged on the liner wall, there are at least three hinges 15, the hinge is connected with the liner 7 through the hinge shaft 16, and the hinge 15 evenly surrounds the liner 7 on the inner wall, and its upper outer diameter is larger than that of the liner to form a protrusion 11, the hinged end...

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PUM

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Abstract

The invention relates to a device that uses physical or chemical character to testing or analyzing material. The invention supplies a seabed sediment gas keeping sampling unit that can realize subsection keeping sampling. It includes releasing device and sampling device that includes sleeve and liner tube in the sleeve. The bit is set at the bottom of the sleeve. The liner tube actively connects to the sleeve. The top of the liner tube is fixation plunger that connects to the releasing device through steel line. Lock mechanism is set on the linear tube. The corresponding trigger mechanism is set on the sleeve. The invention would sample the appointed depth seabed sediments.

Description

technical field [0001] The present invention relates to a device for testing or analyzing materials by means of determining their physical or chemical properties, in particular to a sampling device, more specifically to a liquid or fluid sampling device. Background technique [0002] Oceans have existed on Earth for 4 billion years. In this long geological age, there are innumerable things that have been input into the ocean by land rivers and the atmosphere, and things that have fallen into the seabed during human activities, including soft sediment, dust, remains of animals and plants, and cosmic dust. Scientifically, these things are collectively referred to as seabed sediments. Seabed sediments are like a thick history book, faithfully recording the changes in the earth's climate in every stage, and containing abundant energy resources. Among them, natural gas hydrate is an ice-like white solid substance formed by natural gas and water at l...

Claims

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Application Information

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IPC IPC(8): G01N1/12
Inventor 周东辉刘贵杰李巍然莫成孝姜瑞林
Owner CHINA NAT OFFSHORE OIL CORP
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