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Well clean-up sand washing device and method

A technology of well washing and sand flushing, which is used in earth-moving drilling, wellbore/well components, cleaning equipment, etc. The effect of liquid speed and strong sprinting force

Inactive Publication Date: 2016-02-17
金湖县支点石油科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the low-pressure and high-permeability water wells (oil wells) completed with large-diameter casings, it is always difficult to balance the bottom-hole sprinting force and sand-carrying capacity with the conventional positive circulation or recirculation circulation well washing and sand washing methods.

Method used

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  • Well clean-up sand washing device and method
  • Well clean-up sand washing device and method
  • Well clean-up sand washing device and method

Examples

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Embodiment

[0020] Example: such as Figure 1-3 As shown, the present invention provides a specific embodiment of a well washing and sand washing device, which includes a faucet, a double-layer concentric oil pipe whose top is connected to the water faucet, a well washing device connected to the bottom end of the double-layer concentric oil pipe, and a water source Water source well casing 19 on the well. Wherein the water source well casing pipe 19 bottom deposits sand 18.

[0021] The faucet includes the lifting sub-joint 1 located above, the multi-flow joint 4 connected with the lifting sub-joint 1, the well flushing inlet 2 connected with the high-pressure pump truck pump and connected with the multi-flow joint 4, connected with the multi-flow joint 4 and located in the washing The well-flushing outlet 3 below the well inlet 2, the faucet joint cap 5 stuck on the side of the multi-flow joint 4, the pressure-bearing bearing 6 that is in contact with the faucet joint cap 5, is connecte...

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Abstract

The invention discloses a well clean-up sand washing device and method. The well clean-up sand washing device comprises a faucet, a double-layer concentric oil pipe and a well clean-up device, wherein the faucet is provided with double flow channels and can rotate freely; the double-layer concentric oil pipe is connected with the faucet and is provided with a center channel and an annular flow channel; the well clean-up device is connected with the double-layer concentric oil pipe and can wash and jet flow for swabbing. By means of the well clean-up sand washing device and method, the technological requirements for being high in sprint force and sand-carrying capacity, capable of overcoming the defect of stratum low-pressure loss and the like can be met in the well clean-up sand washing process of a water well, and wellbore immediate vicinity blockage can be eliminated to a certain degree through the well clean-up device with the negative pressure swabbing function.

Description

technical field [0001] The invention relates to the field of well washing and sand washing of oil and water wells in oil fields, in particular to a well washing and sand washing device and method for concentric oil pipes of oil and water wells. Background technique [0002] With the continuous deepening of oilfield exploitation, the demand for water in oilfields is increasing, and the number of water wells (oil wells) has also increased significantly. There are also more and more failures caused by sand production at the bottom of wells or blockage of mechanical impurities. The washing of water wells (oil wells) The workload of well flushing is also increasing. However, in the low-pressure and high-permeability water wells (oil wells) completed with large-diameter casings, it is always difficult to balance the bottom-hole sprinting force and sand-carrying capacity with the conventional positive circulation or recirculation circulation washing and sand washing methods. Cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B37/00
CPCE21B37/00
Inventor 鲁延瑞
Owner 金湖县支点石油科技有限责任公司
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