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Underground electric stepless flow control valve

A flow control valve, a stepless technology, applied in the direction of mining fluid, wellbore/well components, earthwork drilling and production, etc., can solve the problems of inability to adjust the flow rate accurately, and the size of the flow valve opening in the stratification, etc., to achieve structural Simple, simple ground equipment, the effect of continuous flow regulation

Active Publication Date: 2015-05-06
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a downhole electronically controlled stepless flow control valve to solve the problem that the existing flow control tools cannot steplessly adjust the size of the valve port of the flow valve in the stratification downhole.
The present invention can also solve the problem that the prior art cannot accurately adjust the flow rate under different pressure differences downhole

Method used

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  • Underground electric stepless flow control valve
  • Underground electric stepless flow control valve
  • Underground electric stepless flow control valve

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Embodiment Construction

[0026] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.

[0027] Such as figure 1 As shown, the downhole electronically controlled stepless flow control valve according to the embodiment of the present invention includes: a base pipe and a motor sleeved on the base pipe, a reduction device, a transmission device and a valve port kit,

[0028] The motor includes: an annular motor output shaft, that is, a hollow shaft (not shown in the figure), and the annular motor output shaft is rotatably sleeved on the base pipe. The motor is, for example, a ring motor or a ring permanent magnet synchronous motor. The motor can be connected to the wellhead through armored cables or powered by a downhole power supply.

[0029] The reduction device includes: an annular NN type planetary gear reducer 5...

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Abstract

The invention discloses an underground electric stepless flow control valve. The underground electric stepless flow control valve comprises base pipes, and a motor, a speed reduction device, a transmission device and a valve port sleeve part, which are sleeved on the base pipes. The motor comprises an annular motor output shaft which is sleeved on the base pipes in a rotating way. The speed reduction device comprises an annular NN-type small-tooth difference planetary gear reducer (5). The annular NN-type small-tooth difference planetary gear reducer (5) comprises an annular input shaft and an output shaft. The input shaft of the annular NN-type small-tooth difference planetary gear reducer is connected with the annular motor output shaft. The transmission device comprises a threaded pipe (6) and a transmission nut sleeve (9), wherein the threaded pipe (6) is sleeved outside the base pipes in a rotating way, and is connected with the output shaft of the annular NN-type small-tooth difference planetary gear reducer; and the transmission nut sleeve (9) is in threaded connection with and sleeved on the threaded pipe (6), and moves up and down relative to the base pipes (2).

Description

technical field [0001] The invention relates to the field of oil production machinery, in particular to an electronically controlled stepless flow control valve for downhole, the main function of which is to remotely control the size adjustment of the valve port of the downhole flow valve. Background technique [0002] In technologies such as layered mining, layered fine water injection, and horizontal well water control and water plugging, the downhole flow control tool is one of the key links. This tool needs to have the function of adjusting layered flow rate according to changes in geological conditions to achieve optimization. Mining or injecting to further improve water injection effect, prevent early flooding and enhance recovery. The realization principle of the downhole flow control tool is to realize the opening and closing of the flow control nozzle and the adjustment of the size of the flow section by changing the relative positional relationship of the cylindric...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/12
Inventor 黄鹏钱杰张国文张卫平薛建军李明
Owner PETROCHINA CO LTD
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