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A short-process pre-separation water treatment device for oilfield produced fluid

A technology of water treatment device and production fluid, which is applied in the direction of multi-stage serial refining process, hydrocarbon oil treatment, petroleum industry, etc., and can solve the problems such as the solid content of the water outlet of the device is not up to standard, and the device cannot separate mud and sand, etc. Achieve the effect of reducing construction investment, occupying less land, and reducing the volume of the device

Active Publication Date: 2018-02-23
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the device still has two problems. One is that when the incoming liquid contains mud and sand, the device cannot separate the mud and sand; The solid content of the produced water at the outlet sometimes does not meet the standard, so it cannot be directly reinjected into the well

Method used

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  • A short-process pre-separation water treatment device for oilfield produced fluid
  • A short-process pre-separation water treatment device for oilfield produced fluid
  • A short-process pre-separation water treatment device for oilfield produced fluid

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Embodiment Construction

[0030] See figure 1 and Figure 9 As shown, the primary oil-water separation cyclone 2 and the secondary oil-water separation cyclone 3 are connected in series, and the middle outlet of the primary oil-water separation cyclone 2 is connected with the inlet of the secondary oil-water separation cyclone 3. The upper outlets of the secondary oil-water separation cyclone are all connected to the oil discharge pipeline 8; It is also connected to the cyclone 1. The outlet of the upper horizontal pipe of the trapezoidal pipe is connected with the oil discharge pipeline 8, and the outlet of the lower horizontal pipe is connected with the drain pipeline 13 to discharge the separated water.

[0031] The cyclone 1, the primary oil-water separation cyclone 2 and the secondary oil-water separation cyclone 3 are all cyclones, and their structure and working principle are basically the same as "an axial flow cyclone separator with the same direction of flow , Chinese Patent, Patent Applic...

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Abstract

The invention relates to a short-process water pre-separation apparatus for oilfield produced fluid, applied to the treatment of oilfield produced fluid. More than one oil-water separation cyclones are connected in series, a middle outlet of one previous oil-water separation cyclone is connected to an inlet of the next oil-water separation cyclone, all upper outlets of the oil-water separation cyclones are connected to an oil discharge pipeline, a middle outlet of the final oil-water separation cyclone is connected to an inlet of a trapezoidal pipe, an inlet of the previous oil-water separation cyclone is also connected to a gas-liquid-sand separator. Since the gas-liquid-sand separator is used, gas and sand are effectively separated; a floatation treatment system enables suspending solid and oil drops in produced fluid to be better removed.

Description

technical field [0001] The invention relates to a treatment system for oil well output fluid in oil field development, in particular to a short-flow pre-separation water treatment device for oil field output fluid. Background technique [0002] After decades of development, most oilfields in China have entered a period of high water cut or even extremely high water cut, and the volume of produced liquid has continued to increase, which has brought a series of problems such as increased load and energy consumption to the oilfield surface treatment system. The production fluid pretreatment at the front end of the gathering and transportation process can realize 30%-50% sewage reinjection on the spot, reduce the burden on the gathering and transportation system, and reduce production costs. [0003] Traditional hydrocyclones can only separate gas-liquid or separate oil-water two-phase with large oil-water density difference, and have poor removal effect on suspended solids in s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G53/02C10L3/10
CPCC10G53/02C10G2300/1033C10G2300/208C10L3/101C10L3/106C10L2290/08
Inventor 肖建洪郝金克安申法付法栋马继良王刚刘正栾智勇徐传雨朱秀娟于滨陈玲
Owner CHINA PETROLEUM & CHEM CORP
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