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Down-hole ultrasonic oscillation unfreezing device and method

An ultrasonic and water injection well technology, which is applied to vibration generating devices, earth-moving drilling, wellbore/well components, etc. The effect of operating efficiency, reducing operating costs, and saving operating time

Inactive Publication Date: 2019-03-12
CHINA NAT OFFSHORE OIL CORP +1
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  • Abstract
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Problems solved by technology

The water distributor works for a long time in the water injection well, and the precipitated and deposited solid suspended particles in the water phase appear to be supersaturated with a certain salt, which adheres to the inner wall of the pipe string and forms scale. Scale in the interlayer of the water distributor core causes the water distributor core to jam in the working cylinder, affecting the salvage of the water distributor core

Method used

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  • Down-hole ultrasonic oscillation unfreezing device and method
  • Down-hole ultrasonic oscillation unfreezing device and method
  • Down-hole ultrasonic oscillation unfreezing device and method

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Embodiment Construction

[0023] The detailed description and technical content of the present invention are described below with the accompanying drawings, but the accompanying drawings are only provided for reference and description, and are not intended to limit the present invention.

[0024] as attached figure 1 As shown, the present invention provides a downhole ultrasonic vibration unblocking device, which is used for the unblocking operation of tools in the pipe string of the original water injection well. There is a positioning seal 6 and a water distributor mandrel 10. The positioning seal 6 and the water distributor mandrel 10 cooperate with the packer 11 and the gravel-filled completion layer 12 at the lower part of the original water injection well string through a sealing module 16. The original water injection well string also includes The water layer 14 and the artificial bottom 15, the water layer 14 has a perforation section 13.

[0025] The jam-releasing device of the present invent...

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Abstract

The invention discloses a down-hole ultrasonic oscillation unfreezing device and method. The unfreezing device comprises a power supply and a cable collection and release device which are placed on the ground, a cable winds the cable collection and release device, and a depth positioning tool and an ultrasonic oscillation transducer are connected to the lower end of the cable; the ultrasonic oscillation transducer can extend to the upper portion or interior of a down-hole water distributor core for unfreezing operation. The depth positioning tool comprises a cable guiding connector and a magnetic positioning tool; the ultrasonic oscillation transducer comprises an axial ultrasonic transmitter and a radial ultrasonic transmitter. According to the down-hole ultrasonic oscillation unfreezingdevice and method, the problem can be effectively solved that since a water distributor is used for layered water injection of an existing offshore oilfield flooding well, the water distributor is frozen. Accordingly, the operation of a mobile pipe column is avoided, the operation intensity is lowered, the operation time is shortened, and the operation cost is reduced.

Description

technical field [0001] The invention relates to an downhole operation device, in particular to a downhole tool jamming problem by using an downhole ultrasonic vibration unblocking device for downhole tool jamming. Background technique [0002] In oilfield development, it is often necessary to use water injection to replenish formation energy to enhance oil recovery. Oilfield water injection strings generally use the method of lowering the water distributor into the oil pipe for layered water injection. The water distributor works for a long time in the water injection well, and the precipitated and deposited solid suspended particles in the water phase appear to be supersaturated with a certain salt, which adheres to the inner wall of the pipe string and forms scale. Scaling in the interlayer of the water distributor core caused the water distributor core to jam in the working cylinder, affecting the salvage of the water distributor core. [0003] In order to solve the abov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B31/107E21B28/00E21B43/20
CPCE21B28/00E21B31/107E21B43/20
Inventor 崔国亮田发超李孟超苏毅李含秀郭雯霖刁东镇何能欣姜雨省刘明发刘华伟张玮
Owner CHINA NAT OFFSHORE OIL CORP
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