Sand-discharge oil production method and equipment

A wellhead device and oil layer technology, which is applied in the fields of fluid production, earthwork drilling, wellbore/well components, etc., can solve the problem that the top and bottom of the packer cannot be connected, the mixed fluid flow rate is slow, and the oil well casing pressure and dynamic fluid level data cannot be recorded. And other issues

Inactive Publication Date: 2003-08-20
SHENGLI OIL FIELD LONGDI GASOLINEEUM TECH EQUIP
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Problems solved by technology

Due to the large cross-sectional area of ​​the annular space, the flow rate of the mixed fluid in the annular space is slow, and the sand part of the oil layer sinks and falls on the packer, causing the sand of the packer to be buried.
This will cause the oil well to be overhauled and the pump to be pumped up, and the sand from the oil layer will enter the jet pump, block the flow channel, and the pumping operation cannot be carri

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  • Sand-discharge oil production method and equipment
  • Sand-discharge oil production method and equipment
  • Sand-discharge oil production method and equipment

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Embodiment Construction

[0012] As shown in the accompanying drawings, a sand discharge oil production device of the present invention has a wellhead (3) with a flow channel, and the power fluid inlet (2) on the wellhead passes through the flow channel and the wellbore (9) in the wellhead. The downhole power fluid pipe (4) in the wellhead is connected, the mixed fluid outlet (11) on the wellhead device is connected with the downhole mixed fluid pipe (10) in the wellbore through the flow channel in the wellhead device, and the downhole power fluid pipe and the downhole mixing fluid The liquid pipe is connected with the hydraulic jet pump (5) in the pump barrel (8), and the cross-sectional area of ​​the flow path of the downhole mixed liquid pipe is small, so that the flow rate of the mixed liquid containing sand is far greater than the sedimentation velocity of sand produced in the reservoir. It flows upward through the wellhead device to the ground to prevent sand production and settlement in the reser...

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Abstract

The present invention provides sand-discharge oil production method and equipment. The driving liquid is fed to downhole hydraulic jet pump so that the mixed liquid of the driving liquid and stratum liquid is pumped to ground via the mixed liquid pipe with small cross section. The tail pipe in the lower part of the hydraulic jet pump is locked to the inner wall of well. The method and equipment of the present invention can produce oil in a simple process with high yield and low cost.

Description

technical field [0001] The invention relates to a crude oil extraction method and a device thereof, especially a crude oil extraction method in a sand producing oil reservoir. Background technique [0002] In the process of crude oil extraction, due to the influence of factors such as oil layer structure, crude oil physical properties, formation water composition, etc., oil recovery methods and devices must adapt to the requirements of various oil reservoirs such as sand production, wax content, water corrosion, and oil thickness. Sand production in oil reservoirs is regarded as the first factor affecting crude oil production. Sand-producing reservoirs are widely distributed and difficult to control. Many oil reservoirs with rich reserves are unable to produce normally or even shut down due to sand production. At present, sand control methods are adopted for most of the production of sand-producing reservoirs, that is, to prevent formation sand from flo...

Claims

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Application Information

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IPC IPC(8): E21B43/18E21B43/29
Inventor 张树华
Owner SHENGLI OIL FIELD LONGDI GASOLINEEUM TECH EQUIP
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