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Sampling device

A sampling device and extraction pump technology, applied in the direction of sampling device, etc., can solve problems such as time-consuming

Inactive Publication Date: 2021-05-14
张桂芳
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It should be understood that this is a time consuming operation and that every movement of the packer is affected by the collapse of the borehole wall

Method used

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Embodiment Construction

[0024] A sampling device includes a first everted diaphragm assembly and a second everted diaphragm assembly. Figure 1-2 A first everted diaphragm assembly 10 and a second everted diaphragm assembly 30 are shown for defining and forming a constant travel volume in a wellbore, tubing, or the like. As used, the term "wellbore" shall be construed to refer to a wellbore passing through a formation, pipe or similar cylindrical volume having two open and accessible ends, i.e. a generally horizontal borehole geometry shape. As explained more fully hereinafter, the diaphragm 14 is everted through the bore and is operably connected to the inverted diaphragm 34 . When the diaphragm 14 is inverted, the diaphragm 34 overturns to form a constant volume therebetween through the bore.

[0025] figure 1 More particularly shown is a first everted diaphragm assembly 10 including a first canister 12 for housing a first diaphragm 14 . A withdrawal tube 16 is connected to the first diaphragm ...

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Abstract

The invention relates to a sampling device for taking a fluid sample in a borehole; the device comprises a first everted diaphragm assembly and a second everted diaphragm assembly; the first everted diaphragm assembly comprises a first tank for receiving a first diaphragm and the first diaphragm, and an extraction tube is connected to the first diaphragm to allow a sampling material to be extracted from a wellbore when the first diaphragm is totally or partially everted; the extraction tube extends through an end of the first tank and also serves as a tether to invert the first diaphragm from the bore into the first tank; a booster pump is connected to the first tank to expand the first tank to evert the first diaphragm into the borehole; the sampling device further comprises a perforated pipe, a connecting piece, a functional device and a draw-off pump. By means of the everted diaphragm design of the device and the analysis device, samples can be sampled in the drilling advancing direction, and parameter data such as sample flow and components can be obtained in real time.

Description

technical field [0001] The present invention relates to a sampling device and, more particularly, to a sampling device which forms a progressive sampling volume along a wellbore, pipe or the like. Background technique [0002] In many cases, stepwise sampling is required in wellbores, pipelines, etc. to determine the distribution of fluids or fluid substances in the wellbore. Sometimes it is also necessary to isolate a portion of the wellbore to extract or inject fluids. These operations are typically accomplished using a straddle packer that is inserted into the wellbore at the desired location and then expanded to seal the wellbore wall, leaving an exposed portion of the wellbore for sampling and / or isolation . [0003] The packer has the potential to become lodged in the wellbore by material dislodged from one side of the wellbore. This problem is more likely to arise in horizontal wellbores, where the device may be supported by the side of the wellbore during insertio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/14
CPCG01N1/14
Inventor 不公告发明人
Owner 张桂芳
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