Subsurface electric control stepless position adjusting structure

An adjustable structure, stepless technology, applied in the direction of wellbore/well components, production fluid, earthwork drilling and production, etc., can solve the problem that remote control tools are difficult to realize electric drive, and achieve the effect of reducing assembly time

Active Publication Date: 2012-12-26
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The invention provides a downhole electric control stepless position adjustment structure to solve the problem that the existing remote control tools are difficult to realize electric drive

Method used

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  • Subsurface electric control stepless position adjusting structure
  • Subsurface electric control stepless position adjusting structure

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specific Embodiment approach

[0025] Such as figure 1 with figure 2 As shown, the downhole electronically controlled stepless position adjustment structure according to the embodiment of the present invention includes: a base pipe 2 and a motor, a deceleration device and a transmission device sleeved on the base pipe 2 . The motor, deceleration device and transmission device are all ring-shaped, so as to make full use of the annular space of the oil casing annulus, and realize the relative position adjustment of downhole components without affecting the liquid flow channel of the base pipe.

[0026] The motor includes: an annular motor output shaft, and the annular motor output shaft is rotatably sleeved on the base pipe 2 . Further, the motor is, for example, a ring-shaped motor or a ring-shaped permanent magnet synchronous motor, and the motor also includes: a ring-shaped stator 7 and a rotor 8 arranged between the stator 7 and the ring-shaped motor output shaft, and the rotor 8 Located in the annular...

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Abstract

The invention discloses a subsurface electric control stepless position adjusting structure, which comprises a base pipe (2) and a motor, a speed reducer and a transmission device which are arranged on the base pipe (2) in a sleeving manner, wherein the motor comprises an annular motor output shaft which is rotatably arranged on the base pipe in a sleeving manner; the speed reducer comprises an annular NN type planetary gear reducer with a small tooth number difference; and the transmission device comprises a threaded pipe (23) which is rotatably arranged outside the base pipe in a sleeving manner and is connected with a secondary internal gear (15). A transmission nut sleeve (35) is arranged outside the threaded pipe (23) in a sleeving manner through threaded connection and can move up and down relative to the base pipe (2); an upper sliding sleeve (30) is in threaded connection with the upper end of the transmission nut sleeve (35) and is arranged outside the transmission nut sleeve (35) in a sleeving manner; and a lower sliding sleeve (37) is in threaded connection with the lower end of the transmission nut sleeve (35) and is arranged outside the transmission nut sleeve (35) in a sleeving manner.

Description

technical field [0001] The invention relates to the field of oil production machinery, in particular to an electronically controlled stepless downhole position adjustment structure, the main function of which is to remotely control the action of downhole oil production equipment. Background technique [0002] Most conventional well completions are derived from the development of oil and gas fields using simple vertical wells on land or on platforms. In this development mode, once the oil well produces, it will not be produced according to the designed oil production rate due to the decrease of reservoir pressure, the rise of water cut or other downhole problems. With the development of drilling technology in the 1980s and 1990s, especially the emergence of high-angle / horizontal wells, extended-reach wells and multilateral wells, the number of production wells has decreased, while the single well production has increased. In addition, reservoir conditions and harsh environme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/00
Inventor 黄鹏沈泽俊张卫平钱杰李明王新忠
Owner PETROCHINA CO LTD
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