Tube sampler capable of realizing under-pressure sampling, isothermal sampling and anti-shear sampling, and sampling method

A sampler and anti-shear technology, applied in the sampling device and other directions, can solve the problems of difficult piston movement, increased workload, complex structure and sealing, and achieve the effect of reducing sampling workload, avoiding shearing effect, and reliable sealing

Pending Publication Date: 2017-08-18
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the existing crude oil samplers are still unable to realize isothermal anti-shear sampling under pressure. Some samplers have a pressure difference inside and outside the pipeline during sampling, which cannot achieve the effect of eliminating shear; It needs to go through the circulation pump in the middle, so that the oil sample will be additionally sheared by the pump; although some samplers can prevent the influence of the shearing effect in the sampling process, they cannot fundamentally achieve isothermal sampling, and the oil discharged each time The same can only be treated as waste oil, which increases the workload and is not econ

Method used

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  • Tube sampler capable of realizing under-pressure sampling, isothermal sampling and anti-shear sampling, and sampling method

Examples

Experimental program
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Example Embodiment

[0035] Example one

[0036] The first embodiment provides a tubular sampler for realizing isothermal and shear-resistant sampling under pressure, which can directly sample under pressure, isothermal sampling, and shear-resistant sampling without affecting the normal transportation process of the crude oil pipeline 8, and No external force driving is required when sampling, the structure is simple, and the seal is reliable.

[0037] Such as figure 1 As shown, the tubular sampler includes a bypass pipeline 4 arranged obliquely with respect to the horizontal line. Preferably, the inlet end of the bypass pipeline 4 is set higher than the outlet end; the two ends of the bypass pipeline 4 are respectively connected to the bottom of the crude oil pipeline 8 Openable and closable communication, so as to realize sampling under pressure from the crude oil pipeline 8. The bypass pipeline 4 is used to continuously draw and seal the oil from the crude oil pipeline 8, and use the oil to continu...

Example Embodiment

[0045] Example two

[0046] Based on the tubular sampler described in the first embodiment, the second embodiment proposes a sampling method for sampling directly from the crude oil pipeline 8 under pressure, isothermal and anti-shear, without affecting the normal transportation of the crude oil pipeline 8 The process does not require additional internal and external driving devices, with simple structure and reliable sealing.

[0047] The sampling method includes the following steps:

[0048] S1. Put the tube sampler in the initial state. The initial state needs to ensure that the inlet control valve 1, the outlet control valve 7, the drain inlet valve 2 and the sampling valve 6 are all in the closed state.

[0049] S2. Connect one end of the bypass pipe 4 of the tubular sampler with the crude oil pipe 8, and disconnect the other end from the crude oil pipe 8, introduce the oil in the crude oil pipe 8 into the bypass pipe 4 in one direction, and take the bypass pipe The gas in line ...

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Abstract

The invention relates to the technical field of low-viscosity crude oil pipeline transportation equipment, in particular to a tubular sampler and a sampling method for realizing isothermal anti-shear sampling under pressure. In the tubular sampler and sampling method for realizing isothermal anti-shear sampling with pressure of the present invention, the tubular sampler includes a bypass pipeline arranged obliquely relative to the horizontal line, and the two ends of the bypass pipeline are respectively openable to the bottom of the crude oil pipeline. Closed connection, used to continuously extract and seal the oil from the crude oil pipeline; after the pressure of the sealed oil is released, when the gas is introduced into the bypass pipeline, the sealed low-viscosity oil flows out of the bypass pipeline due to its own gravity; based on The sampler proposes a sampling method. The sampler and sampling method can directly implement pressure sampling, isothermal sampling, and anti-shear sampling without affecting the normal transportation process of crude oil pipelines, and the sampling does not require external force driving, and has the advantages of small sampling workload and less waste oil. , Simple structure, reliable sealing advantages.

Description

technical field [0001] The invention relates to the technical field of low-viscosity crude oil pipeline transportation equipment, in particular to a tubular sampler and a sampling method for realizing isothermal anti-shear sampling under pressure. Background technique [0002] The safe and economical transportation of low-viscosity crude oil often adopts the modification technology of adding pour point depressant. During the pipeline transportation of low-viscosity crude oil modified by adding a pour point depressant, it is necessary to regularly detect the changes in the rheological parameters of crude oil, so it is necessary to obtain oil samples from the pipeline in time to test the fluidity of crude oil. Crude oil modified by adding pour point depressant is easily affected by shearing action and temperature change. Therefore, the oil sample should be protected from shearing and temperature changes during sampling. [0003] At present, the existing crude oil samplers ar...

Claims

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Application Information

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IPC IPC(8): G01N1/10
CPCG01N1/10
Inventor 张帆户凯张钰垚王圣洁刘凯张雅琴高乾孟小雨孟嘉岩
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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