Downhole oil-water separator
An oil-water separator and hydrophilic technology, applied in wellbore/well components, production fluids, earth-moving drilling, etc., can solve the problems of difficult connection, low separation efficiency, and small amount of raw liquid, and achieve simple and compact structure and separation effect. Good results
Pending Publication Date: 2020-04-10
NO 719 RES INST CHINA SHIPBUILDING IND
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Problems solved by technology
[0006] (1) When the hydrocyclone is applied downhole, it will be limited by the size of the downhole space, so that the amount of raw liquid that can be processed is small and the separation efficiency is low
[0007] (2) The structure is relatively complex, and when it is arranged underground, it will encounter the problem of difficult connection with other components, and it is difficult to maintain and replace
Method used
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[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiment is only one of the embodiments of the present invention, not all the embodiments. .
[0023] Such as figure 1 As shown, this embodiment provides a downhole oil-water separator, which extracts oil from downhole, performs oil-water separation downhole, and transports the separated oil to the ground, including a motor 17, a pump 16, a sand settling pipe 15, and a raw liquid pipe 14. Coupling 13, protective cap 12, lower outlet pipe 11, middle joint 8, upper outlet pipe 7, hydrophilic filter 6, barrier 5, lipophilic filter 4, upper joint 3, oil outlet pipe 1; the pump 16 is connected with the sand pipe 15 through a pipeline, the sand pipe 15 is connected with the intermediate joint 8 through threads, the raw liquid pipe 14 is respective...
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The invention relates to the technical field of oilfield exploitation, and provides a downhole oil-water separator. Oil extraction is carried out downhole, oil-water separation is carried out downhole, and the separated oil liquid is conveyed to the ground. The separator comprises a motor, a pump, a sand settling tube, an original liquid tube, a coupling, a protective cap, a lower water outlet pipeline, one-way valves, a middle joint, an upper water outlet pipeline, a hydrophilic filter, a barrier, an oleophilic filter, an upper joint and an oil outlet pipeline. The downhole oil-water separator is simple in structure and efficient in separation, the original liquid after sand settling is filtered twice by using the hydrophilic filter and the oleophilic filter, so that the oil liquid separated from the original solution is conveyed to the ground through the oil outlet pipeline and the one-way valve, and the water liquid is injected into a water injection layer below the original liquidlayer through the upper water outlet pipeline, the one-way valve and the lower water outlet pipeline.
Description
Technical field [0001] The invention relates to the technical field of oil field exploitation, in particular to a downhole oil-water separator. Background technique [0002] With the deepening of the oilfield development process, the problem of high water content in produced fluids cannot be ignored. High water content will reduce production efficiency and increase oil production costs. Therefore, how to achieve efficient oil-water separation downhole has become an urgent problem to be solved. Downhole oil-water separation technology can realize the oil-water separation of the raw liquid in the wall of the oil well bore, inject the separated water into the non-oil production layer, and transport the separated oil to the surface. This technology has broad application prospects. [0003] The Chinese patent "A large flow downhole oil-water separator equipped with lifting tubing for offshore use (ZL201410096073.5)" discloses a downhole oil-water separator that uses multi-stage hydro...
Claims
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Login to View More IPC IPC(8): E21B43/38E21B43/40
CPCE21B43/38E21B43/40
Inventor 郑天平黄亚农陆锦锦毋迪毛旭耀刘贻欧
Owner NO 719 RES INST CHINA SHIPBUILDING IND