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Underground generation device

A technology of power generation device and shaft coupling device, which is applied in the direction of engine components, wellbore/well components, machines/engines, etc., can solve the problems of complex structure of reducer and magnetic coupling, low power, easy wear, etc., to increase work Reliability, reduce manufacturing difficulty, and reduce the effect of coaxiality requirements

Inactive Publication Date: 2010-06-09
SHENGLI PETROLEUM ADMINISTRATION BUREAU DRILLING TECH ACAD SINOPEC
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AI Technical Summary

Problems solved by technology

The rotor shaft of the generator is connected to the transmission through magnetic coupling, which avoids the contact between the coil and the bearing and the drilling fluid. However, the structure of the reducer and the magnetic coupling structure are complex, and the sliding contact surface of the magnetic coupling is easy to wear when working in the drilling fluid, and the power is small

Method used

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  • Underground generation device
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Embodiment Construction

[0013] Now in conjunction with the accompanying drawings of the description, the present invention will be further described.

[0014] figure 1 It is a schematic diagram of the downhole power generation device. The downhole power generation device includes a driving sub-joint 21 , a connecting sub-joint 22 and a motor sub-joint 23 . The device is installed in the drill collar 1, the upper part of the downhole power generation device is a filter screen 12, the upper part of the impeller 3 is equipped with the impeller pressure cap 2, the guide tube 13 is installed between the impeller 3 and the drill collar 1, and the rotary seal 5 passes through the seal The gland 4 is pressed tightly, the centralizer 14 is placed on the upper end of the plug 15, the coupling device 6 is installed on the upper end of the motor drive shaft 7, and is elastically connected to the lower end of the impeller drive shaft 16, which reduces the coaxiality requirements of the system. The short joint 2...

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Abstract

The invention discloses a generation device which provides electric energy support to underground instruments and tools and comprises three parts, including a drive short section, a connecting short section and a motor short section. In the device, an impeller drive shaft and a motor shaft are divided into a two section type structure, and the middle part of the impeller drive shaft and the middle part of the motor shaft can be connected through a coupler which can be used for aligning, therefore, the coaxiality requirement of a shaft system is efficiently lowered; a special design structure is adopted on an impeller, and therefore, the output power is larger and above 1kW; a rotor and a stator of the motor are soaked in a hydraulic oil, and therefore, the manufacture difficulty is lowered, and the working reliability is increased. The invention can provide electric energy with large power and also can stably and reliably work underground.

Description

Technical field: [0001] The invention relates to a device for downhole power generation in petroleum engineering, in particular to a power generation device for providing electric energy support for downhole instruments and tools. Background technique: [0002] Modern oil and gas drilling technology involves downhole data measurement of various parameters and provides formation data and drilling engineering information required in the drilling process through the telemetry system. In the downhole measurement tool, the data obtained by the sensor installed in the drill string near the drill bit is transmitted to the ground through the signal remote transmission device for the ground operators to analyze and judge. There are two ways for downhole measurement tools to obtain power downhole, battery pack and turbine generator. Due to the limited battery capacity, the duration of high current work is short, and its safety performance is difficult to guarantee at high temperatures...

Claims

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Application Information

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IPC IPC(8): E21B47/00E21B49/00F03B13/02
Inventor 陈威吕官云孙峰马哲王义峰
Owner SHENGLI PETROLEUM ADMINISTRATION BUREAU DRILLING TECH ACAD SINOPEC
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